PM硬质合金钢CPM-M4粉末高速钢 高碳\合金钢板

High speed steel belongs to high carbon high alloy ledeburite steel, special steel is with special heat treatment in the powder metallurgy high speed steel can obtain high hardness (HRC63 ~ 70), and, and, in 550 ~ 600 ℃ can still maintain a high hardness (HRC 60 or above), and high wear resistance of heat-resistant wear-resistant steel class, its main use for the fabrication of various machine tool cutting tools, mold is partly used in high load, high temperature air bearings and special alloy wear parts, etc.
Metallurgical powder high speed steel, powder metallurgy high speed steel, for short or PM high speed steel. By powder metallurgy method (atomized powder under the hot isostatic pressing treatment) was dense steel billet, then through ing, rolling, etc. The thermal deformation of high speed steel profiles, hereinafter referred to as powder high speed steel. Uniform powder high speed steel group, tiny grain, eliminates the fused cast high speed steel is difficult to avoid segregation, so than fused cast high speed steel of the same component has higher toughness and abrasion resistance, but also has the properties and the heat treatment deformation of small, ed grinding performance is good wait for an advantage. Vastly excels the fused cast high speed steel powder high speed steel carbide content in the allowed range, improved the hardness to HRC67 above, to further improve the wear resistance. If directly made by adopting the method of sintering density or powder ing shape tool, mold or parts close to finished product to the size of the grey piece, save work can achieve more, save material and reduce production costs. Powder high speed steel price although fused cast high speed steel is higher than the same ingredients, but because of superior performance, long service life, used to make costly multitool broach, gear hob, cutter and so on, it still has the significant economic benefits.
High speed steel since 1900, the production of high speed steel is used mostly traditional metallurgical method, namely, ingot casting and ing rolling technology. Owing to the high amount of alloy steel, the chemical composition is complex, ingot casting - size, cooling speed slow and so on, during the solidification will inevitably produce the coarse ledeburite organization carbide segregation. Carbide segregation is a serious quality problems that exist in the high speed steel, segregation is not only to steel ing, rolling and hot working cause difficulties, but also obviously damage the properties of the steel, and limits the increase of high speed steel alloy content, impact on the development of high speed steel.
Legal system since 1960 s, the field of powder metallurgy atomization in high quality pre alloy powder obtained rapid development, plus a cold, hot isostatic pressing machine and application, the advent of making high performance alloy material was produced by powder metallurgy technology. Powder metallurgy high speed steel is obtained by this new process and new type of high alloy steel essful precedent. Powder metallurgy technology not only solved the carbide organization quality problems that exist in the traditional metallurgical technology, but also opened up a difficult or impossible to produce a general casting process of high alloy content of the new way of high speed steel..

粉末冶金高速工具钢由于其制造工艺的独特性, 与铸锻高速钢比较, 具有一系列优异性能： 1： 无偏析, 晶粒细小, 碳化物细小；2：热加工性好；3：可磨削性好：4： 热处理变形小；5： 力学性能(韧性, 硬度, 高温硬度)佳；6： 扩大了高速钢合金含量, 创造了新的超硬高速钢。7： 扩大了使用领域，因此, 粉冶高速钢作为一种新型钢类在高速钢中占有重要的地位。