Transactions of Materials and Heat Treatment

Title：Research and design on die structure for hot forming part

Authors： Liu Chunyu Zheng Wei

Unit： Anhui Jianghuai Automobile Co. Ltd.

KeyWords： frame reinforced plate for car B column boron steel hot stamping die colling system unloading system

ClassificationCode：TG76

year,vol(issue):pagenumber：2016,41(11):110-114

Abstract：

The die structure and working principle of hot forming for a kind of car B column frame reinforcing plate were introduced, and the boron steel after heating was formed by controlling the flow rate of cooling water in the stamping inserts through the above die. Then, the boron steel was heated to 880-950 ℃ and cooled at the minimum cooling speed with the transformation from austenite to martensite. Thus, the stamping workpiece with high strength up to 1500 MPa was obtained. Furthermore, the structure and working principle of the cooling system in the die were mainly introduced. The hot forming and cooling of boron steel are realized by this die structure. The total qualified rate of stamping surface, rabbet and hole reach 95% without wrinkling, cracking and other defects, and the requirements of precision and surface quality of vehicle for the high strength steel parts are met.

Funds：

国家科技重大专项（2014ZX04002041）

刘春雨（1981-），男，学士，高级工程师

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