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- W2373590520 abstract "Spot welding properties of a new Si-Mn type ultrahigh strength hot stamping quenched steel sheet with low carbon steel sheet DC04 in different welding processing parameters was investigated.The tensile property,microhardness distribution and microstructure of welded joints were analyzed.The results show that welding current has a significant effect on nugget diameter and tensile shear stress of the joints,whereas the effect of welding time is a little smaller.There exist two kinds of region of the heat affected zone(HAZ) of the parent metal of ultrahigh strength steel sheet,namely,a soft region with its microhardness much lower than that of the parent metal and its microstructure is tempered martensite,and a hardened region with its microhardness higher than that of the parent metal and its microstructure is fine martensite.The microstructure of nugget is coarse martensite and its harness is lower than that of the parent metal of ultrahigh strength steel sheet and much higher than that of the parent metal of low carbon steel sheet.In the one-dimension tension test,the fracture of welded joints always occurred at the side of low carbon steel sheet owing to its rather coarse microstructure and low hardness of HAZ." @default.
- W2373590520 created "2016-06-24" @default.
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- W2373590520 date "2012-01-01" @default.
- W2373590520 modified "2023-09-24" @default.
- W2373590520 title "Spot Welding Property of Si-Mn Type Ultrahigh Strength Hot Stamping Quenched Steel Sheet" @default.
- W2373590520 hasPublicationYear "2012" @default.
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