Development of a New Electrode for Arc Wclding of Austempercd Ductile Iron(ADI)  

作　　者：孙大谦 周振丰 赵宗举 

机构地区：[1]Welding Division,Jilin University of Technology,Changchun,130025,China

出　　处：《Journal of Materials Science & Technology》1992年第6期401-405,共5页材料科学技术（英文版）

摘　　要：The effect of Ca,Ba,Bi and Al on the amount of carbide in ductile iron weld metal,the microstructural characteristics of ADI weld metal and the effect of heat treatment process on the microstructure and mechanical properties of ADI weld metal have been studied.On this basis the optimum composition of weld and the optimum heat treatment process of ADI weld metal were de- termined and a new electrode for arc cold-welding (i.e.,without preheat) of ADI was developed.The ductile iron welded joint free from eutectic carbide can be produced by using this electrode before austempering and the weld metal obtained after austempering has a microstructure and mechanical properties similar to those of ADI.The mechanical properties of welded joints can match the require- ment of ADI.The effect of Ca,Ba,Bi and Al on the amount of carbide in ductile iron weld metal,the microstructural characteristics of ADI weld metal and the effect of heat treatment process on the microstructure and mechanical properties of ADI weld metal have been studied.On this basis the optimum composition of weld and the optimum heat treatment process of ADI weld metal were de- termined and a new electrode for arc cold-welding (i.e.,without preheat) of ADI was developed.The ductile iron welded joint free from eutectic carbide can be produced by using this electrode before austempering and the weld metal obtained after austempering has a microstructure and mechanical properties similar to those of ADI.The mechanical properties of welded joints can match the require- ment of ADI.

关 键 词：ELECTRODE arc welding austempered ductile iron 

分 类 号：TB3-55[一般工业技术—材料科学与工程]