焊接热循环峰值温度对ASTM4130钢热影响区组织和性能的影响

Hot Working Technology(2010)

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Abstract
采用Gleeble-3500热模拟试验机对ASTM4130钢进行不同热循环峰值温度下的焊接热模拟试验,并对其组织、冲击韧性和硬度进行了分析和测试。结果表明:峰值温度超过固态相变点的热影响区性能恶化,组织以粒状贝氏体、上贝氏体和针状马氏体为主,其中粗晶区韧性最差。而粗晶区经过640℃焊后回火1.5 h,韧性得到改善,硬度下降。
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Key words
welding thermal simulation,ASTM4130 steel,impact toughness,microstructure
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