二次热循环对2.25Cr-1Mo-0.25V钢再热裂纹敏感性的影响  

Effect of Secondary Cycle on Reheat Cracking Susceptibility of 2.25Cr-1Mo-0. 25V Steels

作　　者：卜华全[1] 任明皓[1] 

机构地区：[1]合肥通用机械研究院,安徽合肥230031

出　　处：《压力容器》2017年第12期1-7,共7页Pressure Vessel Technology

基　　金：国家重点研发计划项目(2016YFC0801901)

摘　　要：通过对2.25Cr-1Mo-0.25V钢及其焊缝金属进行不同二次热循环下的Gleeble试验,证实经过二次热循环后,2.25Cr-1Mo-0.25V钢母材的断面收缩率(ROA值)在各种焊后热处理温度下均有显著的提高,再热裂纹敏感性由原来的稍敏感降低为不敏感;对于焊缝金属来说,经过FG(R)-WM和IC(R)-WM的二次热循环模拟后,其ROA值均较CG(R)-WM有所提高,再热裂纹敏感性有所降低;而SC(R)-WM的模拟对其再热裂纹敏感性的影响不大。This article concerned with the reheat cracking sensitivity of 2.25Cr-lMo-0.25V steels. Gleeble test have been made with different secondary weld thermal cycle on 2.25Cr-lMo-0.25V steels and its weldment. The result demonstrated that reduction of area （ROA） of 2.25Cr-lMo-0.25V steels has in- creased with secondary cycle in different PWHT. The susceptibility of reheat cracking decreased from slightly susceptibility to not susceptibility. As for weldment of 2.25Cr-lMo-0.25V steel, the ROA of FG（R）-WM and IC（R）-WM are larger then that of CG（ R）-WM, SC （R）-WM has little change with susceptibility of reheat cracking.

关 键 词：Gleeble试验 二次热循环 再热裂纹 

分 类 号：TH49[机械工程—机械制造及自动化] TH142[一般工业技术—材料科学与工程]