Transactions of Materials and Heat Treatment

Title：Influence of radial loading technique on inner crack produced in forging banded structure

Authors： Zhou Hongqing1 Zhou Hua2 Wang Jiaxuan1 Ai Yunlong1 Chen Weihua1 Wang Feiru1

Unit： 1.School of Aeronautical Manufacturing Engineering 2. Jiangxi Copper Company（Yugan）Co. Ltd.

KeyWords： forging defect banded structure radial loading

ClassificationCode：

year,vol(issue):pagenumber：2015,40(10):11-15

Abstract：

The existence of banded structure with grade 3-4 in the raw material of steel forging resulted in internal holes and cracks along the direction of banded structure distribution of raw material in the actual production for steel ball products，which seriously affects the quality of the service life of the steel ball and ball mill. The raw material with banded structure defects was researched without changing the raw materials, the main direction of deformation was changed from the original axial deformation into the radial deformation，which was vertical to the direction of banded structure distribution. Simulation experiments show that in the process of forging, the radial deformation along the bar can avoid cracks resulted from the band structure, and effectively prevent it from the cracks and expand them continually after heat treatment with forging ratio increasing from 1.3 to 3.2. A more fine grain and better performance of the steel ball forging is obtained and it is verified by experiment through above method.

Funds：

周弘庆（1990-），男，硕士研究生

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