金属材料焊接热影响区自然冷却组织转变曲线图的提出与应用  

Proposal and Application of Welding HAZ Natural Cooling Transformation Curve of Metal Materials

作　　者：柳阳 廉晓洁[1,2] 范光伟[1,2] 赵振铎[1,2] 罗刚[1,2] 李建春[1,2] 张寿禄[1,2] LIU Yang;LIAN Xiaojie;FAN Guangwei;ZHAO Zhenduo;LUO Gang;LI Jianchun;ZHANG Shoulu(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron&Steel(Group)Co.,Ltd.,Taiyuan 030003,China;Technology Center,Shanxi Taiyuan Stainless Steel Co.,Ltd.,Taiyuan 030003,China)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《热加工工艺》2022年第23期109-112,117,共5页Hot Working Technology

基　　金：中国科协青年人才托举工程(2018QNRC001);山西省自然科学基金项目(201801D121076);国家重点研发计划项目(2016YFB0300201);山西省科技重大专项项目(20181101015);山西省重点研发计划项目(201903D121092)。

摘　　要：传统焊接条件下连续冷却组织转变图(简称SHCCT图)中的冷却曲线为恒冷速,而实际焊接过程中的冷却为自然散热,这二者的区别导致SHCCT图无法直接用于预测焊接热影响区的组织与性能。鉴于此,提出了金属材料焊接热影响区自然冷却组织转变曲线图(SHNCT图)。在SHNCT图绘制中,采用焊接热模拟的自然冷却曲线,更加贴近实际焊接的热循环曲线,得到的HAZ组织与性能范围可直接用于指导焊接生产。测定了TSZ410不锈钢在不同t_(1300/250)下焊接热影响区的晶粒尺寸、相比例、硬度与冲击功,并绘制了SHNCT图。The cooling rate in simulated HAZ continuous cooling transformation(SHCCT) diagram under traditional welding condition is constant, while the cooling in actual welding process is natural heat dissipation. The difference between the two processes causes that the SHCCT diagram cannot directly predict the microstructure and performance of the welding HAZ. Therefore, the simulated HAZ natural cooling transformation curve(SHNCT) of metal materials was proposed. During the drawing of the SHNCT diagram, the natural cooling curve duiring welding thermal simulation was used, which is closer to the thermal cycle curve of actual welding. The obtained HAZ structure and performance can be directly used for the guidance of welding production. The grain size, phase ratio, hardness and impact energy of TSZ410 stainless steel HAZ at different t_(1300/250) were measured, and the SHNCT diagram was drawn.

关 键 词：不锈钢 焊接热影响区 热模拟 

分 类 号：TG406[金属学及工艺—焊接]