• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1996, Vol. 32 ›› Issue (3): 102-106.

• 论文 • 上一篇    下一篇

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2Cr12MoVNbNiNB耐热钢时效态硬度与抗拉强度关系

张金旺;符长璞;杜文峰   

  1. 太原重型机械学院;西安理工大学;北京重型电机厂
  • 发布日期:1996-05-01

RELATIONS BETWEEN VICKER HARDNESS AND ULTIMATE STRENGTH OF 2Cr12MoVNbNiNB THERMAL RESISTANT STEEL AFTER LONG PERIOD AGING

Zhang Jinwang;Fu Changpu;Du Wenfeng   

  1. Taiyuan Heavy Machinery Institute Xi'an University of Science and Technology Beijing Heavy-Duty Electrical Machinery plant
  • Published:1996-05-01

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＜20.7×1000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≥20.7×1000时，HV30、σ a与σ b的变化不同步，偏离线性对应关系。

关键词: 抗拉强度, 耐热钢, 使用寿命, 线性关系, 硬度

Abstract: The relations between the Vicker hardness and ultimate strength of 2Gr12MoVNbNiNB thermal resistant steel hardened and tempered at 700℃, and subsequently aging at 550℃～650℃ for 0-5000h, are studied. The results show that ①when L-M parameter P is less than 20.7 × 103, the amount、size and distribution of the second phases in the steel, the content of alloy elements and the dislocation density in the matrix are correlated with the hardness、yield strength and ultimate strength. ②When P is larger than 20.7 × 103. It results that the change of the hardness HV30 and yield strength σ0.2 are not associated with the ultimate strength, the linear relations between HV30; and σb is no more.

Key words: Hardness, Linearrelation, Residual life, Thermal resistant steel, Ultimate strength

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