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T8钢制梯形螺纹塞规的热处理工艺,我厂过去采用780～800℃加热后进行水淬油冷的做法,淬火后经常发现梯形螺纹部分产生裂纹而使塞规报废。分析其原因是截面不均,淬火后应力较大不能及时消除造成的。为了解决上述矛盾,我们采用以下的淬火介质进行等温淬火,使塞规高温时冷却速度快,低温(马氏体转变)时冷却速度慢,从而避免了低温转变
T8 steel trapezoidal thread plug gauge heat treatment process, I used to plant the past 780 ~ 800 ℃ after the water quenching oil cold practice, often found after the trapezoidal thread crack and plug the plug end of the scrap. Analysis of the reason is uneven cross-section, after quenching a larger stress can not be eliminated in time. In order to solve the above contradiction, we use the following quenching medium isothermal quenching, so that when the plug gauge cooling speed at high temperature, low temperature (martensitic transformation) cooling slow, thus avoiding the low temperature transformation