Method for improving the cementing performance of AlSi-coated sheet after hot forming

Abstract

The application belongs to the technical field of steel material application, and discloses a method for improving the cementing performance of AlSi plated sheet after hot forming. The method comprises the following steps: (1) surface mechanical treatment: after the hot forming of the AlSi plated sheet, the surface of the steel sheet to be connected is impacted by silicon carbide or alumina particles with a particle size of 60-120 mesh; (2) surface cleaning: after removing the contaminants on the surface of the sheet by acetone or ethanol, the sheet is washed with clean water and dried; (3) gluing: structural glue is applied, and after the application, the structural glue is compacted to prepare a pull-shear joint; (4) curing and tensile test: the joint is cured at 180±10 DEG C for 25-30 min, and after the curing, a static tensile test is carried out at a tensile rate of 5 mm / min. According to the application, the surface of the hot-formed AlSi plated sheet is mechanically treated, the influence of micro-cracks on the cementing performance is overcome, the selection of structural glue, the thickness of the glue layer and the curing parameters are designed, the pull-shear performance of the cementing joint of the hot-formed AlSi plated sheet is improved, and the strength design requirements of the joint of the automobile structural part are met.

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