材料工程Issue(1)：57-63,7.
热处理避免和消除20钢厚壁高压管应变时效脆化实验研究
Experimental Study on Eliminating and Preventing 20 Steel Thick-wall High Pressure Pipes from Strain Aging Embrittlement with Heat Treatment
摘要
Abstract
Strain aging embrittlement of 20 steel thick-wall high pressure pipes is an important factor which has a great effect on the pipe long-term operating safety. Lots of heat treatments which were commonly used in engineering were adopted to eliminate or prevent the strain aging brittleness. The effect of the treatments was evaluated by Charpy V-notch impact absorption energy. Microstructure and fracture of specimen morphologies were observed by optical microscopy, scanning electron microscopy and transmission electron microscopy. Microstructure change of materials after different heat treatments was also discussed. The results show that the strain aging embrittlement comes into being in rolling process and is enhanced during the bend-forming process of the pipes. Different heat treatments have different effects to eliminate or prevent the strain aging brittleness, among which normalizing plus high temperature tempering is most effective. The deformation degree has a significant effect on recovering the impact properties of materials and whether aging or not after pre-deformation does not have significant effect on the heat treatment efficiency.关键词
热处理/20钢/应变时效脆化/性能恢复Key words
heat treatment/ 20 steel/ strain aging embrittlement/ property recovery分类
矿业与冶金引用本文复制引用
李梦丽,王威强,李爱菊,崔好选,陈忠友..热处理避免和消除20钢厚壁高压管应变时效脆化实验研究[J].材料工程,2011,(1):57-63,7.基金项目
山东大学研究生自主创新基金资助(yzc09061) （yzc09061）
