论文部分内容阅读
高速钢是近代制造金属切削刀具的主要材料之一,改进高速钢热处理工艺,对提高切削寿命,降低成本,具有极重要的意义。高速钢含有大量的合金碳化物很难溶解在奥氏体固溶体内。此外高速钢的临界点与其熔化温度很接近,所以淬火时若稍有过热,即引起熔化。高速钢内含有大量的合金元素,因而导热性较低,其导热性仅及碳钢的1/2～1/3。因此高速钢的传统热处理方法是二次预热(即低温、中温预热),随后高温加热,最后进行冷却。至
High-speed steel is one of the main materials for manufacturing metal cutting tools in modern times. Improving high-speed steel heat treatment process is of great significance to improving cutting life and reducing costs. High-speed steel containing a large amount of alloy carbide is difficult to dissolve in the austenite solid solution. In addition, the critical point of high-speed steel and its melting temperature is very close, so quenching if a little overheating, causing melting. High-speed steel contains a large number of alloying elements, and thus lower thermal conductivity, thermal conductivity and carbon steel only 1/2 ~ 1/3. Therefore, the traditional high-speed steel heat treatment method is the second preheating (ie, low temperature, medium temperature preheating), followed by high temperature heating, and finally cooling. to