자동차용 도금강재의 저항 점용접부 특성

김기철; 차준호; 박화순; Ki Choi Kim; Joon Ho Cha; Hwa Soon Park

Korean Journal of Materials Research, Vol.14, No.4, 239-245, April, 2004

DOI10.3740/MRSK.2004.14.4.239 Export Citation

자동차용 도금강재의 저항 점용접부 특성

Resistance Spot Weldability of Coated Steels for Automobile Applications

김기철^†, 차준호, 박화순¹

포항산업과학연구원
¹부경대학교

Ki Choi Kim^†, Joon Ho Cha, and Hwa Soon Park¹

Research Institute of Industrial Science & Technology, Korea
¹Pukyong University, Korea

E-mail:

Resistance spot weldability of coated steels for automobile applications was investigated. Test samples were prepared from commercial products of 0.8 mm in thickness. Based on the tensile-shear test, surface quality examination and cracking behavior, it was clear that aluminized steels showed good weldability. Microstructural inspection revealed that the coated materials was piled up at the split zone in the welding of aluminized steels. It was also demonstrated that no weld crack was found in the aluminized steel weld metal even the welding was carried out with higher current. However, through thickness cracks were detected at the weld metal of zinc coated steel. Small particles were found on the crack surface of zinc coated steel weld metal. It was thought that zinc vapor played key role to form the weld crack.

Keywords:Aluminized steel;Zinc coated steel;Resistance spot welding;Weld crack

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[1] Asamura T, ISIJ, 77(7), 891 (1991)

[2] Takechi H, ISIJ, 78(3), 339 (1992)

[3] Asada H, Eriguchi T, Soga S, Proc., Japan Welding Society, 56, Apr., 176 (1995) (1995)

[4] Ohara M, Saito T, Jour. of Japan Welding Society, 63(4), 277 (1994)

[5] Saito T, Jour. of Japan Welding Society, 60(6), 484 (1991)

[6] Izawa Y, Teramoto A, Fukuda S, Proc., Japan Welding Society, 61, Sep. 242 (1997) (1997)

[7] Izawa Y, Teramoto A, Fukuda S, Proc., Japan Welding Society, 61, Sep., 244 (1997) (1997)

[8] Warnecke W, Froeber J, Bode R, SAE Technical Paper Series, 1999-01-0022 (1999)

[9] Froeber J, Warnecke W, Technical Report, Thyssen Krupp Stahl AG (2000) (2000)

[10] Yajiang L, Yonglan Z, Corrosion, 234 (1995)

[11] Li YJ, Wang XL, Zhang YL, British Corrosion Jour., 28(2), 149 (1993)

[12] Bahadur A, Sharma TL, Parida N, Mukherjee N, Mohanty ON, Jour. of Materials Science, 28, 5375 (1993)

[13] Shin WC, Min JK, Shur CC, Jour. of Korean Welding Society, 28(11), 1010 (1990)

[14] Torii K, Kandono Y, Tamura Y, Trans. of Japan Welding Society, 2(1), 77 (1971)

[15] Kim HB, Lee CH, Jour. of Korean Welding Society, 15(5), 420 (1997)