Transactions of Materials and Heat Treatment

Title：Research and finite element analysis on properties of “bone layer” material for new “fist type” forging die

Authors： Chen Yanhong Xia Yufeng Liao Hailong Zhang Xue Peng Mengxia

Unit： Chongqing University

KeyWords： hot forging die iron based superalloy multi-pass hot compression microstructure mechanical properties

ClassificationCode：TG316

year,vol(issue):pagenumber：2022,47(5):204-210

Abstract：

In order to adapt to the process environment of high temperature and heavy load for large forgings, a new type of “fist type” forging die was designed, which was mainly composed of “skin layer”, “bone layer” and cast steel matrix. Then, taking the iron based superalloy JX03 as the “bone layer”, its microstructure and mechanical properties changes law before and after multi-pass hot compression were studied. At the same time, the service condition of iron based superalloy JX03 as “bone layer” was analyzed by the finite element simulation software DEFORM, the microstructure changes of materials before and after multi-pass hot compression were observed by optical microscope (OM), X-ray diffraction (XRD) and energy dispersive spectrometer (EDS), and the mechanical properties changes were observed by microhardness test. The results show that the more sorbite distribution in iron based superalloy JX03 leads to better comprehensive mechanical properties, and the alloy carbides mainly composed of Cr23C6 form dispersion strengthening. However, the decreasing of strengthening element content at the jojnt surface has a negative effect on the bonding strength, but the microhardness of iron based speralloy JX03 is improved after hot compression. Thus, the finite element analysis shows that iron based superalloy JX03 as a “bone layer” can provide better structural support in the boss and side wall and provide enough stress buffer in the platform and depression.

Funds：

国家自然科学基金资助项目（51775068）

作者简介：陈沿宏（1997-），男，硕士研究生，E-mail：cyh1021767795@163.com；通信作者：夏玉峰（1972-），男，博士，教授，E-mail：xyfeng@cqu.edu.cn

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