Transactions of Materials and Heat Treatment

Title：Improvement of forging process for valve body quality

Authors： LI Zeng-guo~1 LIU Geng-wu~2 1.Department of Mechanical and Electrical Engineering Jiangsu Animal Husbandry & Veterinary College Taizhou 225300 China 2.Department of Mechanical & Electrical Engineering Hunan Railway Professional Technology College Zhuzhou

Unit：

KeyWords： valve body forging process double forging

ClassificationCode：TG316

year,vol(issue):pagenumber：2007,32(6):34-36

Abstract：

The quality problems,such as crack,shrinkage cavity of end face,puckering etc.,existing in valve body af- ter being forged were analyzed.In forging process,the metal flowing difficulty caused by the temperature of end face of valve body being very low,the cross sections changing greater and the distribution of metal being irrational were the main reasons of quality problems.The process of the valve body was improved.The method of double forging was used,then the circle bar of middle part was forged and the blank was cut into two parts with flame cutting at last.Af- ter improvement,the amount of material was reduced,and the quality problems of crack,shrinkage and puckering of end face were solved.The experiment proves that this method is very feasible for the valve body.

Funds：

Reference：

[1]俞汉清，陈金德．金属塑性成形原理[M]．北京：机械工业出版社，1999年．
[2]刘润广．锻造工艺学[M]．哈尔滨：哈尔滨工业大学出版社，1992．

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