Metal Cutting Tools Materials--Superhard Cutting Tool Materials

Superhard cemented carbide cutting tool materials refer to diamond and cubic boron nitride. It should be noted that the processing of general materials or heavy use of high-speed steel and cemented carbide. Only high hardness or super finishing superhard cemented carbide cutting tool has a better economic efficiency.

The diamond (one of superhard cemented carbide cutting tool materials) is the hardest material found in nature, the two points natural diamond and synthetic diamond micro hardness 10000HV.

-There are three types of diamond tool (one of superhard cemented carbide cutting tool):

1. Natural single crystal diamond tool: natural single crystal diamond particles more than 100mg (0.5 carats), expensive, and its crystal structure of the diamond tool performance impact, mainly used for precision machining of non-ferrous materials and non-metallic. Single crystal diamond tool crystalline interface has a certain direction, different crystal surface hardness and wear resistance are large differences in the selection of a plane when sharpening, otherwise affect the quality of sharpening diamond tool.

2. Synthetic polycrystalline diamond tool: alloy catalyst role by graphite under high temperature and pressure transformed from. Synthetic polycrystalline diamond synthetic diamond microcrystalline under high temperature and pressure sintering can be made into the desired shape and size, inlaid arbor. Improve the impact strength, the diamond cutter larger choice of cutting parameters. The polycrystalline diamond crystallization interface no fixed direction, freely sharpening.

3. The diamond sintered body: The sintered cemented carbide substrate layer of about 0.5mm thick polycrystalline diamond. Diamond burn sintered body better strength, allows the cutting cross-section larger, can also be interrupted cutting, Therefore, this diamond tool may be used repeatedly regrinding.

The main advantages of diamond tool:

1) High hardness and wear resistance of diamond tools.

2) The diamond tool has good thermal conductivity, low thermal expansion coefficient. Therefore, the diamond tool cutting does not produce a great thermal deformation of the precision machining beneficial.

3) Diamond cutter blade surface roughness, the cutting edge is very sharp. Therefore, it is capable of a thin layer cutting, for ultra-precision machining.

Polycrystalline diamonds is used for manufacturing sharpening cemented carbide cutting tool for grinding wheels, cutting blade and grinding wheel with marble and other stone products. The diamond tool is mainly used for the non-ferrous materials, such as the finishing of the Al-Si alloy, super finishing; high hardness of the non-metallic material, such as compression of the finishing of wood, ceramic, corundum, glass, etc.; and difficult to process composite materials processing . The diamond heat resistance temperature of only 700 to 800 ° C, its working temperature is not too high, diamond and easily with carbon affinity, it is not appropriate processing carbon black metal.

Superhard cemented carbide cutting tool materials - cubic boron nitride (CBN)

CBN is one of superhard cemented carbide cutting tool materials, transformed from hexagonal boron nitride (white graphite) under high temperature and pressure, the 1970s developed a new type of superhard cemented carbide cutting tool material.

The main advantages of CBN tools (one of superhard cemented carbide cutting tools):

1) CBN tools are second only to diamond tools with high hardness and wear resistance of 3500-4500HV,.

2) CBN tools have high thermal stability, 1300 ℃ oxidation does not occur with most metals, the iron-based material is not from a chemical action. So, they can cut high hardness steel material and heat-resistant alloy with high speed. these superhard cemented carbide cutting tool bond and diffusion wear are small.

3) CBN tools have a better thermal conductivity; such superhard cemented carbide cutting tool and steel friction coefficient are small.

4) CBN flexural strength and fracture toughness of the range between the ceramic and cemented carbide.

Because a series of advantages of the CBN materials, such superhard cemented carbide cutting tool for roughing and semi-finishing of hardened steel, chilled cast iron. Can speed cutting high temperature alloys, thermal spray materials difficult to machine materials.

CBN and cemented carbide can also be sintered into one, such a CBN sintered body, the flexural strength of up to 1.47GPa, can be used after repeated regrinding.

Chinatungsten Online can provide various sizes and grades of diamond tool and other superhard cutting tool , non-standard products are also customized according to customer requirements. Welcome to consult and purchase sales@chinatungsten.com, sales@xiamentungsten.com .

主站蜘蛛池模板: 亚洲第一综合色| 欧美日韩国产综合视频在线看| 亚洲AⅤ优女AV综合久久久| 久久综合狠狠色综合伊人| 国产色婷婷五月精品综合在线| 久久久久综合中文字幕| 亚洲国产综合欧美在线不卡| 狠狠88综合久久久久综合网| 亚洲 综合 欧美在线视频| 亚洲伊人久久成综合人影院| 五月天综合网| 日韩欧美Aⅴ综合网站发布| 色视频综合无码一区二区三区| 亚洲va欧美va国产综合| 亚洲国产免费综合| 久久综合国产乱子伦精品免费 | 狠狠色伊人亚洲综合成人| 亚洲精品第一综合99久久| 国产精品综合AV一区二区国产馆| 色青青草原桃花久久综合| 狠狠色综合网站久久久久久久| 婷婷五月综合丁香在线| 自拍三级综合影视| 亚洲 欧美 日韩 综合aⅴ视频| 狠狠综合久久综合中文88| 国产精品天干天干在线综合 | 自拍 偷拍 另类 综合图片| 久久久久久久综合日本亚洲| 狠狠色狠狠色综合伊人| 日韩无码系列综合区| 激情综合亚洲色婷婷五月 | 欧美久久天天综合香蕉伊| 欧美αv日韩αv另类综合| 色777狠狠狠综合| 亚洲国产天堂久久综合网站| 久久综合久久久| 久久综合综合久久综合| 亚洲国产成人久久综合碰| 色婷婷综合在线| 狠狠色丁香久久综合婷婷| 亚洲AV成人潮喷综合网|