焊接工艺对ZL116合金焊缝力学性能及组织的影响  

Effect of Welding Process on Mechanical Properties and Microstructure of ZL116 Alloy Welds

作　　者：孟晓东 张荣强 郝圆亮 王子阳 李波 崔婧钰 邢昌勇 郑宗文 MENG Xiao-dong;ZHANG Rong-qiang;HAO Yuan-liang;WANG Zi-yang;LI Bo;CUI Jing-yu;XING Changyong;ZHENG Zong-wen(Hebei Steel Research Dekai Technology Co.,Ltd.,Baoding 072750,Hebei,China)

机构地区：[1]河北钢研德凯科技有限公司,河北保定072750

出　　处：《铸造》2023年第10期1272-1276,共5页Foundry

摘　　要：利用线切割机从ZL116铸造合金上切取尺寸为100 mm×35 mm×10 mm试样,将切取的试样开单V型坡口,设置坡口间距为2 mm,通过采用反变形法将直径2.0 mm的焊丝垫在距坡口3 mm的位置进行焊接,随后利用X光检测焊接完成的试样,利用电子万能拉伸试验机对试样的力学性能进行检测,利用光学显微镜对焊接后的组织进行观察。试验结果表明:当焊接电流为115 A、保护气流量为25 L/min时,焊缝的力学性能最优,焊接性能可以达到母材的标准要求,这是因为焊接区域金属凝固过冷度较大,且远超铸造组织进而导致α-Al晶粒形态的优化。The wire cutting machine was used to cut 100 mmx35 mmx10 mm samples from ZL116 casting alloy.The sample was cut with a single V-shaped groove,and the groove spacing was set to 2 mm.The welding wire with a diameter of 2.0 mm was welded at a position 3 mm from the groove by the anti-deformation method.Then the welded specimens were examined by X-ray.The mechanical properties of the samples were tested by electronic universal tensile testing machine and the microstructure after welding was observed by optical microscope.The test results showed that when the current welding was 115A and the protection gas flow was 25 L/min,the mechanical properties of the weld were the best,and the welding performance could meet the standard requirements of the base metal.The supercooling degree of metal solidification in the welding area was larger than that of the casting structure,which leaded to the optimization ofα-Al grain morphology.

关 键 词：反变形法 焊接 力学性能 组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG404[金属学及工艺—金属材料]