• CN:11-2187/TH
  • ISSN:0577-6686

›› 1980, Vol. 16 ›› Issue (1): 72-77.

• 论文 • 上一篇    下一篇



  1. 北京钢铁学院
  • 发布日期:1980-01-01

An Investigation of Low Temperature Temper Embrittlement of Si-Mn-Mo-V Steels with Medium Carbon Content

Qiu Yaojian;Cao Fengyu;Yang Rang   

  1. Beijing Institute of Iron and Steel Technology
  • Published:1980-01-01

摘要: 本文利用冲击韧性试验、断裂韧性试验、显微断口形貌观察及离子探针等分析方法研究了硅锰钼钒钢的低温回火脆性。试验结果表明,不含钼的硅锰钢,有明显的低温回火脆性,这个脆性出现在360℃(以下简称360℃脆性),加入钼(>0.33%)能使360℃脆性大大减弱,甚至完全被抑制。但钒含水量量从0.05到0.33%对于60℃脆性无显著影响。钼和钒对断裂韧性的影响具有与冲击韧性相似的规律。离子探针的分析结果表明,硅锰钢360℃脆性的出现是与磷沿奥氏体晶界的偏析有关。

Abstract: In this work the effect of alloying elements molybdenum and vanadium on the low temperature temper embrittlement of Si-Mn steels has been investigated by means of impact test, fracture toughness test, fractography and ion probe micro-analysis. The results of the investigation showed that Si-Mn steels have obvious low temperature temper embrittlement when molybdenum is absent. This embrittlement occurs at 360℃. The addition of about 0.3% molybdenum to this steel can greatly reduce or completely suppress the 360℃ embrittlement. Vanadium ranging from 0.05 to 0.33% has no significant influence on the 360℃ embrittlement. The behaviour of the effect of molybdenum and vanadium on fracture toughness is analogous to that of the effect on impact toughness. Based on the results of ion probe micro-analysis it has been shown that the 360℃ embrittlement of Si-Mn steels is associated with the segregation of phosphorus on the grain boundaries of prior austenite.