A new preparation technology of structural-gradient materials without a brittle transition zone in a Mn-Si-Cr-B bainitic cast steel
A new preparation technology of structural-gradient materials without a brittle transition zone in a Mn-Si-Cr-B bainitic cast steel
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Mn-Si-Cr-B贝氏体铸钢无脆性过渡区组织梯度材料制备新工艺
DOI：
10.1007/s41230-018-8057-7
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发表时间：
2018-07
期刊：
影响因子：
1.6
通讯作者：
Jiang Wen qiang
中科院分区：
文献类型：
--
作者：
Zhao Yu guang;Wang Zhe;Xu Xiao feng;Zhang Ming zhe;Jiang Wen qiang
In the present work, a unique gradient cooling heat treatment process (GCHT) for a Mn-Si-Cr-B bainitic cast steel was developed, and microstructure and mechanical properties were examined by OM, SEM, EBSD and a uniaxial tensile test. The results showed that the structural-gradient-material (SGM) with a gradient microstructure from granular bainite to martensite was successfully produced, and it exhibited a good ductility (~13.8%) at one end and an excellent ultimate strength (~1,720 MPa) at the other end. In between the bainite and martensite, a transition region with a superior combination of tensile strength and ductility (1,700 MPa and 11.1%) was obtained, which is different from the normal knowledge of a brittle transition region. Moreover, through changing the gradient of cooling rate, the optimized SGM with a new gradient microstructure from pearlite to martensite showed a more stable structural gradient and an improved ductility (22.8%) at one end. The microstructure variation in the sample was mainly related to the carbon diffusion rate during heat treatment, and the diffusion rate could be controlled by regulating the cooling velocity. Therefore, the SGMs with different gradient microstructures could be designed to meet the needs of different properties. As a result, this work provides a new approach for preparation of the gradient structured steel, which has potential for practical application for dual-property automobile parts.
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影响因子：
4
作者：
R. G. Baggerly
通讯作者：
R. G. Baggerly
DOI：
10.1007/bf02656714
发表时间：
1985-01-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
TOMITA, Y;OKABAYASHI, K
通讯作者：
OKABAYASHI, K
影响因子：
1.6
作者：
Xiang Chen;E. Vuorinen;J. Grahn
通讯作者：
Xiang Chen;E. Vuorinen;J. Grahn
影响因子：
1.5
作者：
J. Shields
通讯作者：
J. Shields
DOI：
10.1016/s1006-706x(14)60035-2
发表时间：
2014-02
影响因子：
2.5
作者：
Lin-na Duan;Yu Chen;Qing-you Liu;S. Jia;C. Jia
通讯作者：
Lin-na Duan;Yu Chen;Qing-you Liu;S. Jia;C. Jia