There are four common cracking phenomena in stainless steel stamping parts. They occur after stretching and deformation, stretching immediately after taking out from the mold, when being shocked or vibrating after deformation, or after a period of stretching deformation or during use. The horizontal or point cracks on the side wall of the stainless steel stamping part may be caused by the crystal defects of the materials such as mixed objects and ferrite. of.

The horizontal or dot -shaped cracks on the side wall of the 304 stainless steel pulling deep parts are mainly caused by miscellaneous or ironing in the material substrate. Therefore, in the production and manufacturing process of stainless steel, the following two points should be controlled:

(1) Increase the purity of the material and reduce the content of the debris in the stainless steel substrate.

(2) Improve the hot rolling and cold -rolled annealing process to reduce the iron content in the stainless steel substrate.

However, because these two manufacturing defects inevitably exist in the production process of stainless steel materials, appropriate process measures can also be taken to reduce or avoid suppression products such as processing insulation cups and pressure cookers. Crack caused by ferrite defects:

(1) The forming method is changed from Bo La Shen to the thickness.

(2) Increased the trail of the lane, increase the radius of the molded corner, and reduce the difficulty of material deformation.

(3) When processing high -quality stamping hardware, appropriately increase the viscosity of stretching oil, promote the uniform deformation of the material, and avoid excessive stress concentration.