摘要
研究了淬火７００℃回火的２Ｃｒ１２ＭｏＶＮｂＮｉＮＢ耐热钢在５５０～６５０℃时效０～５０００ｈ的硬度与屈服强度、抗拉强度之间的关系。发现①当Ｐ＜２０．７ｘ１０８时，钢中第二相数量、大小、形状、分布，基体中合金元素含量、位错密度均发生显著变化。②当Ｐ≥２０．７ｘ１０３时，ＨＶ３０、与的变化不同步。
the relations between the Vicker hardness and ultimate strength of 2Cr12MoV-NbNiNB thermal resistant steel hardened and tempered at 700℃ ,and subsequently agingat 550-650℃ for 0-5 000h, are studied.The results show that①when L-M parameterP is less than 20.7×103, the amount、size and distribution of the second phases in thesteel, the content of alloy elements and the dislocation density in the matrix are correl-ated with the hardness. yield strength and ultimate strength. ②When P is larger thna20.7×103. It results that the change of the hardness HV30 and yield strength are not associated with the ultimate strength,the linear relations between HV30;and is11O more.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
1996年第3期102-106,共5页
Journal of Mechanical Engineering
关键词
耐热钢
硬度
抗拉强度
线性关系
使用寿命
Thermal resistant steel Hardness Ultimate strengthLinearrelation Residual life
