S.Q. Wang
,
Q.C. Jiang
,
X.H. Cui and Z.M. He(School of Materials Science and Engineering
,
Jilin University of Technology
,
Changchun 130025
,
China) Manuscript received in revised form 15 September 1998
金属学报(英文版)
By the modification, network carbide was disconnected at 1100℃ through uneven dissolution at higher energy places in carbide, where there is twin or lattice distortion,and granulated at 1130℃ through element diffusion. The stability of M7C3 carbide was decreased owing to the modification reducing the segregations of Cr and M0, thus the temperature, at which uneven dissolution of carbide commenced, was decreased. Also lattice distortion or defect such as twin in carbide was increased by the modification, which prompted widespread disconnections in carbide. In addition, the modification prompted element diffusion to accelerate the kinetics process of carbide granulation.
关键词:
ledeburite steel
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