YD carbide rods welding tecnnology.

Welding technology: YD type electrode are made on oxygen - acetylene flame surfacing welding, using the welding tip should be larger than ordinary gas welding carbon steel used in the tip. The flame should be transferred into neutral or slightly partial carbonizing flame. Neutral flame should strictly control the tip of the flame core position, can't come into contact with carbide particles and workpiece surface, in order to avoid burnt, which is higher than the common welding tip, this is the key of affecting the service life of wear-resistant surfacing layer, do not ignore.


Welding should be as far as possible when using flat position, other position welding should be used when appropriate clamping fixture. Work site must be well ventilated to avoid harmful to health.


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YD RODS FROM SIX STAR HARDMETAL

Few real one PDC CUTTER for oil drilling.

In China at presents, it is very few can produce the good quality PDC CUTTERS for oil field applications, but we are the few real one.

PDC Cutter(Polycrystalline diamond compact) is composed of polycrystalline diamond layer and tungsten carbide substrate.The polycrystalline diamond layer possesses extremely high hardness and abrasion resistance whereas the tungsten Carbide substrate would greatly improve the malleability and weld ability of the whole composite.

Product Description

1. High hardness, abrasion resistance and impact resistance

2. High speed

3. Cutter layout is force balanced to drill a precise round hole and reduce bit whirl

4. Gauge pads have tungsten carbide inserts for maximum wear resistance

5. The diamond layer with thickness over 1 mm increases abrsion resistence of PDC cutter.

6. Sintered at high pressure and temperature

Usage: It can be used in making wire-drawing die, Geological bit, oil bit, PCD cutting tools, wood cutting tool, and polishing Jewels.

PCD is a diamond combo produced by synthetic diamond sintered with bond under high temperature and high pressure; It has very high wearability and high thermal stability. Its widely used in petroleum extraction, diamond machining, geology drill and mechanical processing tools.

PCD series have lower wearability than TSP series. It is the first choice for nature diamond cutting & polishing nowadays. We can provide different shapes and different sizes of PCD.

Item (D)(mm) (T) (mm) Thickness(t) (mm) Diamond Chamfer (mm)

1308 13.44± 0.03 8.00± 0.10 2.30± 0.20 0.30± 0.10

1313 13.44± 0.03 13.20± 0.10 2.30± 0.20 0.30± 0.10

1608 15.88/16.00± 0.03 8.00± 0.10 2.30± 0.20 0.30± 0.10

1613 15.88/16.00± 0.03 13.20± 0.10 2.30± 0.20 0.30± 0.10

1908 19.05± 0.05 8.00± 0.10 2.30± 0.20 0.30± 0.10

1913 19.05± 0.05 13.20± 0.10 2.30± 0.20 0.30± 0.10

1916 19.05± 0.05 16.31± 0.10 2.30± 0.20 0.30± 0.10

PDC(Polycrystalline diamond compact) is composed of polycrystalline diamond layer and tungsten carbide substrate.

The polycrystalline diamond layer possesses extremely high hardness and abrasion resistance whereas the tungsten Carbide substrate would greatly improve the malleability and weld ability of the whole composite.

PDC Cutter with best carbide substrate High hardness, High speed,abrasion resistance and impact resistance.

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Method of superhard materials and metal matrix composite materials and petroleum drill stabilizer and oil drilling.

Diamond superhard materials usually refers to the kind of material, for example: natural diamond, synthetic polycrystalline diamond PCD, polycrystalline diamond composite piece of PDC and impregnated diamond sintering and cubic boron nitride CBN has a very high hardness and wear resistance of the material. Superhard material and metal materials, especially steel composite can be made into excellent comprehensive performance of superhard wear-resistant tools. Currently widely used in petroleum drilling tools, geological exploration, mining engineering, and special cutting tools, abrasive wear parts, etc. Existing technology in general sintering, non-pressure immersion or brazing method, connected superhard materials and alloy steel. These methods, the implement process is complex, high cost, and high temperature in the process of sintering welding heat can significantly reduce the comprehensive performance of superhard materials and metal substrate.

Existing technology and adopt the way of interference fit of the tungsten carbide tooth set fixed on the steel substrate, the method of the method of cemented carbide tooth column machining accuracy requirement is very high, generally need to be adopted to reach the final assembly size of grinding. But for the high temperature of polycrystalline diamond and cubic boron nitride polycrystalline, due to its shape and size of the error is bigger, not directly use the method of interference fit with fixed on the metal substrate, can only adopt the method of grinding, to the final assembly size. And this kind of superhard material grinding is difficult, time is long, the cost is high, so difficult to directly on industrial application will superhard material cylinder fixed on the metal substrate.
Widely used in oil drilling tool stabilizer to stable drilling borehole wall, controlling well track and repair, especially in the directional well and horizontal well, the wearability of downhole stabilizer put forward higher requirements. The downhole stabilizer is mainly to the widespread use of tungsten carbide hard alloy as its surface wear-resisting layer, commonly used on the steel substrate Mosaic, welding tungsten carbide tungsten carbide cylinder block or welding tungsten carbide, etc. In directional well and horizontal well, as a result of contact with the casing load is bigger, the drilling tool with tungsten carbide as wear-resisting layer stabilizer wear serious, life is short, downhole stabilizer after the impact of the accuracy of wellbore trajectory control. In order to improve the wear resistance and service life of the downhole stabilizer, can adopt the method of the invention above on the steel substrate Mosaic polycrystalline diamond cylinder to replace tungsten carbide cylinder as its wear-resisting layer, due to the wear resistance of polycrystalline diamond cylinder is around 90-100 times of tungsten carbide cylinder, thus can greatly improve the wear resistance of drill stabilizer.

By the same method, in the roller bit tooth bit body or claw back, cone surface, enchase diamond polycrystalline cylinder or polycrystalline diamond teeth, as a gauge or trimming tooth, replace the current use of tungsten carbide tooth, can greatly improve the wear resistance of drill bits and gauge ability, keep the bit diameter and trim sidewall effect.

There is another application, in the current set with tungsten carbide tooth on the basis of using shape memory alloy tube collar for a horse collar cemented carbide tooth column, the Mosaic interference to tooth holes on the surface of the roller, because the superelasticity of shape memory alloys with high damping shock absorption properties, can cushion the impact of the external load stress, avoid teeth fracture.

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Carbide cutting tools industry trends.

With the progress of science and technology, we are in a rapid development period, advanced manufacturing technology application of cnc machine tools, greatly reduce the auxiliary time of parts processing, greatly improved productivity. When general aviation parts processing, shorten the auxiliary time, cutting accounted for the proportion of time increases accordingly, in order to further improve the productivity of machine tools, must increase cutting speed, this also is in recent decades the main reason for the rapid development of high speed cutting technology. High-speed machining the earliest light alloy is mainly used in the aviation industry, has now become a aviation manufacturing industry to improve processing efficiency and quality, the main way to reduce the processing cost.

In aviation parts processing, high speed cutting is a large number of applications, mainly has the following several reasons:

(1) in order to maximize the weight loss and meet other requirements, many of the artifacts, wall panels, "overall manufacturing method", namely remove allowance on large pieces of blank, the formation of thin wall, fine steel structural parts, need to remove a large number of metal materials, cutting time lead to take parts total production time proportion is very big, so one of the ways to improve productivity is to adopt the high-speed cutting processing.

(2) aircraft parts of complex structure, high accuracy, stiffness of thin-walled parts, thin steel structure is poor, try to reduce the radial cutting force and thermal deformation of machining, only using high-speed machining can meet these requirements.

(3) the difficult-to-machine materials, such as high temperature nickel base alloy, titanium alloy, high strength structural steel adopted by modern aviation products, the material strength, high hardness, impact resistance, easy processing of hardening, high cutting temperature and tool wear serious, belong to the hard processing material. Generally adopt the low cutting speed for processing, if the high speed cutting, not only can greatly improve the productivity and can effectively reduce the tool wear, improve the quality of the surface of the parts. High-speed machining is different from the traditional machining technology of machining mechanism and the application advantages, it is a conceptual change in nc machining process. According to the material and structure characteristics of aviation products, in order to realize high speed machining must be advanced in order to ensure the high speed cutting tools. High-speed cutting tools must have good wear resistance and high strength and toughness, advanced cutting tool materials, excellent geometric structure parameters of cutting tool coating technology, reasonable and highly dynamic balance system, safe and reliable way of clamping, as well as the high concentricity of the blade precision and so on.

The development direction of cutting tool materials and applications
At present, in the field of aircraft manufacturing, high speed steel cutting tools account for about 60% of the total amount of all kinds of cutting tool always, cemented carbide cutting tools account for about 35% of the total amount of cutting tool, superhard cutting tools (cubic boron nitride, diamond) accounted for less than 5% total all cutting tools and in the future, as the aviation new materials constantly emerging, the increase of hard cutting, dry cutting application, carbide cutting tools, coated tools, ceramic cutting tool, cubic boron nitride cutting tool and the proportion of polycrystalline diamond cutting tools will be greatly increased.

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PDC Cutter with best carbide substrate High hardness, High speed,abrasion resistance and impact resistance.

Diamond single crystal and industrialization.

The development of large single crystal diamond is not enough for our country. Here consists of two aspects of content:

PDC Cutter with best carbide substrate High hardness, High speed,abrasion resistance and impact resistance.

Synthesis method of large particles diamond single crystal seed crystal; (2) the epitaxial growth method is adopted to develop large single crystal diamond. Synthesis method of large particles diamond single crystal seed crystal, although it has about 6 mm of big domestic single crystal, there are 10 mm or study plan, but it is rare in the market. While Japan's sumitomo corporation available synthetic diamond single crystal diamond tool adopted the larger particles.
Epitaxial growth method is used to develop large single crystal diamond, should cause our great attention. Some people think that the epitaxial growth cannot obtain diamond single crystal, but in natural crystal growth is a kind of phenomenon, starting with a lot of small crystal bud, grew up in a basement, crystal sprouts grow up step by step, gradually reduce the crystal quantity. We call this phenomenon "geometric elimination law", we can use this to explain the fact that may develop into single crystal diamond thin film.
Cubic boron nitride composite and its development of functional materials
The current domestic research and production of cubic boron nitride composite strength is quite weak, research institutes and universities are limited in several, is 1 ~ 2 production enterprises. The original thinking of cubic boron nitride should account for 25% ~ 30% of superhard material, after decades of development also accounted for only 5% ~ 5%, this is an unreasonable phenomenon. Not to mention its composite functional materials was developed.
A, cubic boron nitride composite sheet of restricted to henan an enterprise, its diameter is ф (30 ~ 35) mm, the technology will need to be further improved, especially the uniformity, stability, if can industrialization, as its development prospect will be considerable.
B, cubic boron nitride functional research domestic visible may simply be at jilin university. So far in the world with high temperature and high pressure method in laboratory under the condition of maximum size of the synthesis of cubic boron nitride single crystal is only 3 mm. Especially most of the growth of the crystal shape is irregular, unfit for device research applications. For this, the researchers conducted a functional device with high purity flake synthesis, cubic boron nitride single crystal is obtained nearly millimeter level surface with optical flatness, shape rules of high purity flake cubic boron nitride single crystal. As we have laid the foundation for the further study on its properties.
Cubic boron nitride crystal is a typical Ⅲ - V compound, its resistivity is 1010 Ω. Cm, 13 w/cm. The thermal conductivity K, can tolerate high temperature of 1200 ° C, and have the most wide direct band gap of 6.4 eV, so also is a kind of very important excellent semiconductor material, it in high temperature and high power broadband device microelectronics has a broad application prospect. Cubic boron nitride with sphalerite structure, belongs to the macroscopic symmetry F43m - Td group, also can have a second order nonlinear optical effect. It can be used to make optical higher harmonic generator, electro-optic modulator, visible and ultraviolet light converter, optical rectifier, optical parametric amplifier and so on. Cubic boron nitride as diamond still has a strong ability to resist radiation, to the preparation of radiation devices. Therefore, the preparation of cubic boron nitride materials research to the national economy in various fields, especially in the aerospace, military and other harsh environmental conditions application breakthrough device has important practical significance.
Due to the sheet, the synthesis of cubic boron nitride crystal provided can be used as the properties of crystal material, make us in the study of nature of cubic boron nitride is very apparent success. For example, with the development of lamellar cubic boron carbide, then can be obtained with diamond CVD method will cover up the ideal semiconductor devices. So the functional sex of the cubic boron nitride research becomes the more important!


From the above content, we have a lot of work needs to be done in superhard materials. We often say that the 21st century is the century of diamond, it is not only in the development and application of abrasive, more will be the development and utilization of functional. Our country has a good study atmosphere, with a large number of old and new combined with development of science and technology talents. We totally believe in the near future comprehensive catch up with and surpass the advanced world level.

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Look at the future development of cutting tool from the airline industry demand

Entering the 21st century, competition in the market driving machines technology as the forerunner of advanced manufacturing technology is developing at unprecedented speed, aviation parts and components manufacturing also has entered in the digital manufacturing technology for the development of the characteristics of The Times. Advanced aviation product requirements aviation parts has more excellent performance, lower cost and higher environmental protection, and machining process requirement has faster speed, higher reliability, high repeat precision and reproducibility. Traditional tool cannot meet the above requirements, cutting tool industry and entered the "high precision, high efficiency, high reliability and specialty" of the new pattern of modern cutlery production. High speed and high efficiency cutting with the progress of science and technology, we are in a rapid development period, advanced manufacturing technology application of nc machine tools, greatly reduce the auxiliary time of parts processing, greatly improved productivity. When general aviation parts processing, shorten the auxiliary time, cutting accounted for the proportion of time increases accordingly, in order to further improve the productivity of machine tools, must increase cutting speed, this also is in recent decades the main reason for the rapid development of high speed cutting technology. High-speed machining the earliest light alloy is mainly used in the aviation industry, has now become a aviation manufacturing industry to improve processing efficiency and quality, the main way to reduce the processing cost.

In aviation parts processing, high speed cutting is a large number of applications, mainly has the following several reasons:

(1) in order to maximize the weight loss and meet other requirements, many of the artifacts, wall panels, "overall manufacturing method", namely remove allowance on large pieces of blank, the formation of thin wall, fine steel structural parts, need to remove a large number of metal materials, cutting time lead to take parts total production time proportion is very big, so one of the ways to improve productivity is to adopt the high-speed cutting processing.

(2) aircraft parts of complex structure, high accuracy, stiffness of thin-walled parts, thin steel structure is poor, try to reduce the radial cutting force and thermal deformation of machining, only using high-speed machining can meet these requirements.

(3) the difficult-to-machine materials, such as high temperature nickel base alloy, titanium alloy, high strength structural steel adopted by modern aviation products, the material strength, high hardness, impact resistance, easy processing of hardening, high cutting temperature and tool wear serious, belong to the hard processing material. Generally adopt the low cutting speed for processing, if the high speed cutting, not only can greatly improve the productivity and can effectively reduce the tool wear, improve the quality of the surface of the parts. High-speed machining is different from the traditional machining technology of machining mechanism and the application advantages, it is a conceptual change in nc machining process. According to the material and structure characteristics of aviation products, in order to realize high speed machining must be advanced in order to ensure the high speed cutting tools. High-speed cutting tools must have good wear resistance and high strength and toughness, advanced cutting tool materials, excellent geometric structure parameters of cutting tool coating technology, reasonable and highly dynamic balance system, safe and reliable way of clamping, as well as the high concentricity of the blade precision and so on.

To be continued.

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Carbide die life of more than ten times that of steel or even dozens of times

Carbide die life of more than ten times that of steel or even dozens of times, hard alloy moulds only high hardness, high strength, corrosion resistance, high temperature resistant and low expansion coefficient, are generally use cobalt tungsten carbide.

As the market standard material YG3, YG6, YG6X YG8. YG15, YG20, YG20C, YG25 and HU20 HU222, HWN1 (non-magnetic alloy mold), etc., using native carbide material, low pressure sintering and other special craft, toughness is better than the regular production, life will also improve 3-5 times.

Hard alloy moulds according to use can be divided into four categories:
The first category for cemented carbide drawing die, most of this kind of mould of cemented carbide mould. At present the main brand of wire drawing die YG8, YG6, YG3, followed by the YG15, YG6X, YG3X, developed some new brands, such as used in high-speed wire drawing new brand YL, and from the number of imported wire drawing die CS05 (YLO. 5), CG20 (YL20), CG40 (YL30); K10/19 dated, ZK20 / ZK30.

The second type of mold is cold cold heading die, plastic mould, the main brands are YC20C, YG20, YG15, CT35 and YJT30 MO15.
The third type of mould is used for magnetic material production of non-magnetic alloy mold, such as series of YSN YSN (20, 25, 30, 35, including 40) and steel bonded magnetic mold brand TMF.

The fourth class for hot-work die, this kind of alloy temporary top brands, the market needs to increase. Cemented carbide mould is: cold heading die, cold punching die, drawing die, hexagonal die, screw die, etc.

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