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在马氏体形成过程中所残留的奥氏体,能够显著地影响钢的验证应力和疲劳性能。因此,为了在生产中得到良好的质量控制及在研究工作中追踪转变过程,希望能够准确地测量残余奥氏体的量。钢中残余奥氏体的量是受合金元素和冷却速率影响的。它在高合金(低马氏体转变点)钢中最显著,但在合金含量低的情况以及合碳量低到0.5%的普碳钢中,也曾发现相当数量的残余奥氏体。在有利的条件下,金相、膨胀和饱和磁强法也能对残余奥氏体作适
The retained austenite during martensite formation can significantly affect the proof stress and fatigue properties of the steel. Therefore, in order to get good quality control in production and follow the process of transformation in the research, it is hoped that the amount of retained austenite can be accurately measured. The amount of retained austenite in the steel is affected by alloying elements and cooling rate. It is most pronounced in high alloy (low martensitic transformation point) steels, but a significant amount of retained austenite has also been found in low alloy steels and in general carbon steels with carbon contents as low as 0.5%. In favorable conditions, metallography, expansion and saturation magnetisation can also be suitable for the retained austenite