Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments

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	Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments
其他题名	Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments
	Cui Junjun 1; Chen Liqing 1
	2017
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	33 期号:12 页码:1549-1554
摘要	To further improve the mechanical performance of a new alloyed austempered ductile iron (ADI), deep cryogenic treatment (DCT) has been adopted to investigate the effect of DCT time on the microstructure and mechanical behaviors of the alloyed ADI Fe-3.55C-1.97Si-3.79Ni-0.71Cu-0.92Mo-0.64Cr-0.36Mn-0.30 V (in wt.%). With increasing the DCT time, more austenite transformed to martensite and very fine carbides precipitated in martensite in the extended period of DCT. The amount of austenite decreased in alloyed ductile irons, while that of martensite and carbide precipitation increased. The alloyed ADI after DCT for 6 h had the highest hardness and compressive strength, which can be attributed to the formation of more plate-like martensite and the finely precipitated carbides. There was a gradual decrease in hardness and compressive strength with increasing the DCT time to 12 h because of the dissolution of M3C carbide. After tempering, there was a decrease in mechanical properties compared to the direct DCT sample, which was caused by the occurrence of Ostwald ripening of precipitated carbides. The optimum wear resistance was achieved for the alloyed ADI after DCT for 6 h. The wear mechanism of the alloyed ADI in associating with DCT is mainly consisted of micro-cutting wear and some plastic deformation wear. (c) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
其他摘要	To further improve the mechanical performance of a new alloyed austempered ductile iron (ADI), deep cryogenic treatment (DCT) has been adopted to investigate the effect of DCT time on the microstructure and mechanical behaviors of the alloyed ADI Fe-3.55C-1.97Si-3.79Ni-0.71Cu-0.92Mo-0.64Cr-0.36Mn-0.30 V (in wt.%). With increasing the DCT time, more austenite transformed to martensite and very fine carbides precipitated in martensite in the extended period of DCT. The amount of austenite decreased in alloyed ductile irons, while that of martensite and carbide precipitation increased. The alloyed ADI after DCT for 6 h had the highest hardness and compressive strength, which can be attributed to the formation of more plate-like martensite and the finely precipitated carbides. There was a gradual decrease in hardness and compressive strength with increasing the DCT time to 12 h because of the dissolution of M3C carbide. After tempering, there was a decrease in mechanical properties compared to the direct DCT sample, which was caused by the occurrence of Ostwald ripening of precipitated carbides. The optimum wear resistance was achieved for the alloyed ADI after DCT for 6 h. The wear mechanism of the alloyed ADI in associating with DCT is mainly consisted of micro-cutting wear and some plastic deformation wear.
关键词	MECHANICAL-PROPERTIES CAST-IRON BEHAVIOR HARDNESS STEEL ADI INSERTS Alloyed ductile iron Austempering Deep cryogenic treatment (DCT) Microstructure Mechanical properties
收录类别	CSCD
语种	英语
资助项目	[National High Technology Research and Development Program of China]
CSCD记录号	CSCD:6148888
引用统计	被引频次：3[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/150618
专题	中国科学院金属研究所
作者单位	1.东北大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Cui Junjun,Chen Liqing. Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2017,33(12):1549-1554.
APA	Cui Junjun,&Chen Liqing.(2017).Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,33(12),1549-1554.
MLA	Cui Junjun,et al."Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 33.12(2017):1549-1554.