本文研究了微量硫对W14Cr4VMn高速钢热塑性的影响:热扭转实验证实微最硫仍能危害钢的热塑性;Auger能谱仪实验发现,即使钢中的硫含量降低到0.002wt-％时,硫仍偏聚在晶界上。本文讨论了硫偏聚和微量硫危害热塑性的原因。
The effect of trace S on the hot plasticity of high speed steels has been examined. It was shown that the S content in W14Cr4VMn steel decreased from 0.01％ down to a possible lowest limit of 0.002％ the number of cycles of the hot torsion test increases about 20％ under 950-1150℃. This indicates that the hot plasticity of the high speed steels may be deteriorated even if a trace S contained. AES was observed that the S segregation occurs along the austenite grain boundaries. The reason of the S segregation and its deterioration on the hot plasticity of the steels has also been discussed.
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