J. Mater. Sci. Technol. ›› 1992, Vol. 8 ›› Issue (6): 401-405.

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

SUN Daqian ZHOU Zhenfeng ZHAO Zongju ** Welding Division,Jilin University of Technology,Changchun,130025,China+ To whom correspondence should be addressed   

  1. WeldingDivision,JilinUniversityofTechnology,Changchun,130025,China;WeldingDivision,JilinUniversityofTechnology,Changchun,130025,China;WeldingDivision,JilinUniversityofTechnology,Changchun,130025,China
  • 收稿日期:1992-11-28 修回日期:1992-11-28 出版日期:1992-11-28 发布日期:2009-10-10

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

SUN Daqian ZHOU Zhenfeng ZHAO Zongju ** Welding Division,Jilin University of Technology,Changchun,130025,China+ To whom correspondence should be addressed   

  • Received:1992-11-28 Revised:1992-11-28 Online:1992-11-28 Published:2009-10-10

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摘要： <正> The effect of Ca,Ba,Bi and Al on the amountof carbide in ductile iron weld metal,themicrostructural characteristics of ADI weld metaland the effect of heat treatment process on themicrostructure and mechanical properties of ADIweld metal have been studied.On this basis theoptimum composition of weld and the optimumheat 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.Theductile iron welded joint free from eutectic carbidecan be produced by using this electrode beforeaustempering and the weld metal obtained afteraustempering has a microstructure and mechanicalproperties similar to those of ADI.The mechanicalproperties of welded joints can match the require-ment of ADI.

Abstract: 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.

Key words: electrode, arc welding, austempered ductile iron