模拟焊后热处理对P690QL1钢组织和力学性能的影响

Guo Dashan,Zhang Peng,Wang Jiuqing,Pang Huiyong,Sang Deguang,Xiao Chunjiang,Wang Tong

Wide and Heavy Plate（2022）

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Abstract

通过模拟焊后热处理(SPWHT)试验,研究SPWHT对调质状态P690QL1钢组织和力学性能的影响.结果表明:P690QL1钢经过调质处理,获得粒状贝氏体、板条贝氏体和马氏体组织,其中贝氏体含量较高,马氏体含量较低,细小碳化物弥散分布在马氏体、贝氏体基体和晶界上.经过SPWHT处理,板条束合并,板条贝氏体和马氏体减少,粒状贝氏体增多,贝氏体基体上析出的碳化物数量增多,导致P690QL1钢的强度和塑性降低,冲击韧性无明显变化.

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