采用热模拟技术、显微分析方法和力学性能测试等手段,对连续油管用粒状贝氏体钢在TTG焊接过程中,接头热影响区不同部位的微观组织和宏观力学性能进行分析.与此同时,热影响区与母材组织及力学性能的对比表明,在接头热影响区中,过热粗晶区以长条状铁素体组织为主,冲击功相对较高.正火区和不完全正火区组织以多边形铁素体为主,晶粒之间晶界清晰,块状铁素体之间为片状和粒状珠光体组织,冲击功较低;回火区没有发生明显相变,晶粒尺寸比母材略有增加,组织发生了微小的回复再结晶,材料的冲击功有所回复.
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