Laser Dissimilar Welding of AISI 430F and AISI 304 Stainless Steels

Materials

Aleksandra Świerczyńska¹  Krzysztof Pańcikiewicz²  Paulina Hućko²  Marek Tumidajewicz³ 

[1] Faculty of Mechanical Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland;Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Kraków, Poland;RaQun Sp. z o.o., Fabryczna 4, 38-300 Gorlice, Poland;

关键词: laser welding;    austenitic stainless steel;    martensitic stainless steel;    dissimilar welded joint;    microstructure;    sulfide inclusions;   

DOI  :  10.3390/ma13204540

来源: DOAJ

【 摘 要 】

A dissimilar autogenous laser welded joint of AISI 430F (X12CrMoS17) martensitic stainless steel and AISI 304 (X5CrNi18-10) austenitic stainless steel was manufactured. The welded joint was examined by non-destructive visual testing and destructive testing by macro- and microscopic examination and hardness measurements. With reference to the ISO 13919-1 standard the welded joint was characterized by C level, due to the gas pores detected. Microscopic observations of AISI 430F steel revealed a mixture of ferrite and carbides with many type II sulfide inclusions. Detailed analysis showed that they were Cr-rich manganese sulfides. AISI 304 steel was characterized by the expected austenitic microstructure with banded δ-ferrite. Martensitic microstructure with fine, globular sulfide inclusions was observed in the weld metal. The hardness in the heat-affected zone was increased in the martensitic steel in relation to the base metal and decreased in the austenitic steel. The hardness range in the weld metal, caused by chemical inhomogeneity, was 184–416 HV0.3.

【 授权许可】

Unknown