Transactions of Materials and Heat Treatment

Title：Influence of forging ratio on heredity rules of grain structure for die steel H13

Authors： Li Changrong Zhang Qian Wang Peng

Unit： Guizhou University Guizhou Province Key Laboratory for Metallurgical Engineering and Process Energy Saving

KeyWords：贵州省科技厅重点工业攻关项目（黔科合GY【2012】3016）

ClassificationCode：TG314

year,vol(issue):pagenumber：2017,42(10):9-12

Abstract：

To investigate the influence of forging ratio on the grain structure heredity of die steel H13, the die steel H13 was vacuum smelted in the laboratory and processed into forgings with different forging ratios, and the microstructure changes before and after forging under different forging ratios and isothermal spheroidizing at 860 ℃were observed. The results show that when the forging ratio is 1, the grain of die steel H13 after isothermal spheroidizing keeps its original grain and appears obvious heredity phenomenon. When the forging ratio increases, the grain size increases and refines, and the heredity of grain decreases. When the forging ratio is 4, the grain size is up to 8.1 with super grain level, and the heredity of grain is almost eliminated. Thus, with the forging ratio increasing, the grain is significantly broken, and the heredity of grain is obviously weakened.

Funds：

贵州省科技厅重点工业攻关项目（黔科合GY【2012】3016）

作者简介：李长荣（1963-），男，博士，教授,E-mail：cr263@163.com

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