【摘要】 回火脆化是Cr-Mo钢最严重的失效形式。文中对12Cr2Mo1和12Cr1MoV钢进行低温系列冲击试验,确定其韧脆转变温度(DBTT)。结合P的非平衡晶界偏聚理论,分析回火脆性的主要影响因素。运用经验公式估算合金元素对钢的韧脆性能的影响,结果表明,P的含量大大影响了钢的脆性,而Cr、Mo等元素在抑制回火脆性方面具有重要作用。更多还原

【Abstract】 Temper brittleness is its serious fault form.A series of impact tests were made on12Cr2Mo1and12Cr1MoV samples.Ductile-brittle transition temperatures(DBTT)were ascertained of two type materials.Combine the non-equilibrium grain-boundary segregation theory of P,analysis the major effect factor of temper brittleness.Calculations of empiristic formu la indicate that the content of P influence the brittleness of steel smartly and the influence of Cr and Mo are smarter.更多还原