• CN：11-2187/TH
• ISSN：0577-6686

›› 1980, Vol. 16 ›› Issue (1): 72-77.

• 论文 •

### 硅锰钼钒钢低温回火脆性问题的研究

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

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.