焊后热处理温度对T91焊口硬度的影响
Hot Working Technology(2012)
Abstract
对按照规范焊接的3组T91试样进行不同温度(640、760和880℃)的焊后热处理,再对三组试样进行硬度测试并观察母材、HAZ及焊缝的组织。结果表明:焊后热处理超温导致焊缝硬化、HAZ软化,焊缝组织粗大;焊后热处理温度不足导致焊缝硬化,但HAZ的硬度变化不大。
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Key words
post-weld heat treatment,T91,hardness,temperature
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