焊接热输入对HQ130钢焊接热影响区组织硬度的影响  

EFFECT OF WELDING HEAT INPUT ON MICROSTRUCTURES AND HARDNESS IN THE HAZ OF HQ130 STEEL

作　　者：孙俊生[1] 武传松[1] 李亚江[1] 

机构地区：[1]山东工业大学连接技术研究所,济南250061

出　　处：《金属学报》1999年第9期999-1004,共6页Acta Metallurgica Sinica

基　　金：教育部优秀年轻教师基金

摘　　要：MIG／MAG焊接热输入包括焊接电弧热流和熔滴带入熔他的热熔量两部分，本文以作者提出的焊接热输入分布模型为基础，建立了熔池流场和温度场的数值分析模型，采用数值模拟技术研究了焊接热输入对HQ130钢焊接热影响区（HAZ）组织和硬度的影响规律，给出了不同焊接热输入时HAZ不同部位奥氏体晶粒尺寸及组织和硬度的计算结果，实验表明，HQ130钢焊接热循环及HAZ组织。For metal-inert gas/metal-active gas arc welding (MIG/MAG), the welding heat inputincludes the arc heat flux on the surface of workpiece and the volumetric distribution of droplets heat contentwithin the weldpool. Based on the distribution model of the welding heat input, which was put forwardby the author, a numerical analysis model of the fluid flow and temperature field of MIG/MAG weldpoolwas set up in this paper. Numerical simulation technique is employed to study the effects of welding heatinput on the microstructure and hardness in HAZ of HQ130 steel, and to give out the calculation resultsof austenite grain size, microstructure and hardness in different part of the HAZ under the condition ofthe differeni welding heat inputs. Experimental results indicated that the predicted weld thermal cycle,microstructure and hardness of the HAZ coincide with the measured results.

关 键 词：焊接热输入 分布模型 HQ130钢 组织性能 硬度 

分 类 号：TG402[金属学及工艺—焊接] TG142[一般工业技术—材料科学与工程]