Transactions of Materials and Heat Treatment

Title：A new method to manufacture the valve body by combining free forging with die forging

Authors： Hu Lin1 Lan Qiao2 Li Pu1 Yan Shuang1 Ren Dejun1 Pan Xiuxiu2

Unit： 1.Chengdu Shuangliu Hengsheng Forging Limited Liability Company 2.Sichuan University

KeyWords： valve body free forging die forging

ClassificationCode：

year,vol(issue):pagenumber：2015,40(7):19-23

Abstract：

Based on the existing problems in manufacturing the valve body with the casting method or with the traditional die forging method, such as the performance of valve body produced by casting process dissatisfying the working requirements due to high repair rate, and high die cost dissatisfying the diverse customers requirements when valve bodies were produced in small-lot production by die forging method, a new method combining free forging with die forging to manufacture valve bodies was proposed. The valve body was obtained by manufacturing the green body with free forging process, forming the final shape with die forging process, and obtaining the ultimate valve body with correcting process. This new method not only can make full use of the light tonnage equipment to obtain the valve body that satisfies the working requirements, but also solve the problems of performance of valve body manufactured by casting method. Furthermore, problems of high cost in production and diverse processing of valve body manufactured by traditional forging method were solved. The practice production of this valve body proves that the valve body manufactured by this new method not only meets the working requirements in performance, but also reduces its weight by nearly 30% compared with the valve body manufactured by traditional die forging method, which achieves the goal of cost-saving and green manufacturing.

Funds：

胡林（1963-），男，学士，工程师

Reference：

[1]廖清常. 大型铸造不锈钢阀体失效行为研究[D]. 广州：华南理工大学, 2010.

Liao Q C. Study on Failure Behavior of Large-scale Casting Stainless Steel Valve Body[D].Guangzhou：South China University of Technology, 2010.

[2]陈四维. 阀体类铸钢件的铸造工艺[J]. 东方电机, 2010, 38(2): 20-24.

Chen S W. The casting process of valve body of cast steel[J]. Dong Fang Dian Ji, 2010, 38(2): 20-24.

[3]吴永良, 帅昌银. 超低碳不锈钢阀体的试制[J]. 铸造技术, 2005, (3):250-252.

Wu Y L, Shuai C Y. Trial-manufacturing of ultra-low carbon stainless steel valve body[J]. Foundry Technology, 2005, (3):250-252.

[4]Mi G F, Liu X Y, Wang K F, et al. Application of numerical simulation technique to casting process of valve block[J]. Journal of Iron and Steel Research(International), 2009, (4):12-17.

[5]陆梦禹, 何晓宗. 防止熔模铸造阀体产生铸造缺陷的实践[J]. 中国铸造装备与技术, 2006, (1):33-34.

Lu M Y, He X Z. Practice in preventing defects occurred in valve of investment casting[J]. China Foundry Machinery & Technology, 2006, (1):33-34.

[6]高文成. 整体开模锻造电站阀体[J]. 大型铸锻件, 2010, (3):22-23.

Gao W C. The integral open die forging process for the power station valve body[J]. Heavy Casting and Forging, 2010, (3):22-23.

[7]吴斌. 阀体锻造成型工艺及模具设计[J]. 无锡职业技术学院学报, 2011, 10(1): 64-66.

Wu B. Body shape forge process and die design[J]. Journal of Wuxi Institute of Technology. 2011, 10(1): 64-66.

[8]向小琴, 喻涛. 锻造工艺对钢中组织偏析的改善[J]. 锻压技术, 2014, 39(1):11-13.

Xiang X Q, Yu T. Segregation improvement in steel by changing forging technology[J] . Forging & Stamping Technology, 2014, 39(1):11-14.

[9]李增国, 刘庚武. 阀体的锻造工艺改进[J]. 锻压技术, 2008, 32(6): 34-36.

Li Z G, Liu G W. Improvement of forging process for valve body quality[J]. Forging & Stamping Technology, 2008, 32(6): 34-36.

[10]Gontarz A. Forming process of valve drop forging with three cavities[J]. Journal of Materials Processing Technology, 2006, (1-3):228-232.

[11]胡亚民, 华林, 许树勤, 等.锻造工艺过程及模具设计[M]. 北京：中国林业出版社, 2006.

Hu Y M, Hua L, Xu S Q, et al. The Forging Process and Die Design
［M］.Beijing： China Forestry Publishing House, 2006.

Service：

【This site has not yet opened Download Service】【Add Favorite】