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现在,一般根据高速钢的硬度和由光学金相法测定的组织特征(碳化物的不均匀性,奥氏体的晶粒度等)来评定高速钢的质量。但是,实际的晶粒度等)来评定高速钢的质量。但是,实际上常常遇到在同样的硬度和显微组织的情况下,高速钢具有十分不同的工艺性能和使用性能。这种差别是由于不能为光学金相法所显示的,高速钢的不同的精细结构所引起的。可
Nowadays, the quality of high-speed steel is generally evaluated according to the hardness of high-speed steel and the microstructure characteristics determined by optical metallography (carbide unevenness, austenite grain size, etc.). However, the actual grain size, etc.) to assess the quality of high-speed steel. However, in fact, often encountered in the case of the same hardness and microstructure, high-speed steel has very different process performance and performance. The difference is due to the different fine structures of HSS that can not be demonstrated by optical metallography. can