A kind of preparation method of high-strength saddle shell

Abstract

The invention discloses a method for preparing a high-strength saddle shell. The method includes the following steps: 1) material selection: the chemical composition mass percentage of steel is: C: 0.2-0.3, Mn: 1.1-1.4, Si: 0.2-0.3 0.3, B: 0.002-0.0035, the rest is Fe and unavoidable impurities; 2) Flat stamping forming: Stamping into the saddle shell body of the required shape and size; 3) Pressing and bending: the saddle shell The edge of the body body is subjected to bending treatment to obtain a formed saddle shell; 4) Quenching: placed in a protective gas N 2 5) Tempering treatment; 6) Sand blasting treatment; 7) Painting treatment to obtain the finished product. The material selected in the invention has low processing difficulty, and the strength and wear resistance are greatly improved after special heat treatment after forming.

Description

technical field [0001] The invention belongs to the technical field of auto parts manufacturing, and in particular relates to a preparation method of a high-strength saddle shell. Background technique [0002] The car saddle shell is an important part of the car saddle assembly. It is in direct contact with the bottom plate of the trailer box and bears a large positive load. Therefore, the saddle shell is required to have high strength and certain wear resistance. Sexuality, the surface of the saddle shell often wears out during use, and the resulting compensation is relatively high. At present, the plates used in the production of saddle shells are mostly low-carbon steel cold-formed plates with a thickness of 8 mm. [0003] With the development of the lightweight trend of automobiles, the self-weight of automobiles is gradually decreasing, but the load capacity of automobiles is gradually increasing, which requires the saddle shell to have greater load-carrying capacity, ...

AI Technical Summary

Problems solved by technology

The upgrade of material strength leads to the need to invest in equipment with greater stamping capacity, and the investment cost increases accordingly; and the higher the material strength, the more difficult it is to stamp for parts with complex shapes such as saddle shells, and the bending angle It is easy to crack or the bending is not in place, and the product quality is difficult to guarantee; in addition, although the strength of the material is upgraded, the hardness of the material surface is still low (HB180-250), the wear resistance of the shell is poor, and the wear rate of the shell is still high. Compensation is still high

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