GCr15轴承钢模拟连铸凝固的实验研究

IF 2.2 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Ironmaking & Steelmaking Pub Date : 2018-07-19 DOI:10.1080/03019233.2018.1498603

Jiang Danqing, Wang Rui, Zhang Qiong, Zhang Zhenqiang, W. Baojun, Ren Zhong-ming

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引用次数: 1

摘要

建立了GCr15轴承钢坯连铸过程模拟实验装置。利用该装置，在各种过热和冷却条件下铸造直径为140 mm的坯料。对凝固组织、枝晶形貌、偏析和碳化物进行了研究。结果表明，熔炼过热和冷却条件对微观组织和溶质偏析有显著影响。结果表明:钢的二次枝晶臂间距随过热度的升高而增大，随冷却速率的减小而减小;较低的过热度和较高的冷却速率促进了组织的细化。细化坯料中心等轴晶结构，降低了碳的偏析。随着冷却速率的增加，珠光体层间距得到细化，共晶碳化物的析出得到抑制。

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Experimental investigation on solidification of GCr15 bearing steel by the simulated continuous casting

ABSTRACT An experimental apparatus for simulation of continuous casting process of GCr15 bearing steel billet is established. With the apparatus, the billets of diameter 140 mm are casted in various superheats and cooling conditions. The solidification macrostructure, dendrite morphology, segregation and carbide are investigated. It is shown that melting superheats and cooling conditions remarkably influence the microstructure and solute segregation. It is found that the secondary dendrite arm spacing of the steel increases with the increase of the superheat temperature, and with decrease of the cooling rate. Lower superheat with higher cooling rate promotes the refining of the microstructure. Refining equiaxed grains structure in the centre of the billet leads to lower segregation of carbon. Furthermore, with increasing cooling rates, the spacing of the pearlite laminar is refined and the precipitation of proeutectic carbides is suppressed.

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来源期刊

Ironmaking & Steelmaking 工程技术-冶金工程

CiteScore

3.70

自引率

9.50%

发文量

125

审稿时长

2.9 months

期刊介绍： Ironmaking & Steelmaking: Processes, Products and Applications monitors international technological advances in the industry with a strong element of engineering and product related material. First class refereed papers from the international iron and steel community cover all stages of the process, from ironmaking and its attendant technologies, through casting and steelmaking, to rolling, forming and delivery of the product, including monitoring, quality assurance and environmental issues. The journal also carries research profiles, features on technological and industry developments and expert reviews on major conferences.