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Microstructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments
Alternative TitleMicrostructure and abrasive wear resistance of an alloyed ductile iron subjected to deep cryogenic and austempering treatments
Cui Junjun1; Chen Liqing1
2017
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume33Issue:12Pages:1549-1554
AbstractTo 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.
Other AbstractTo 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.
KeywordMECHANICAL-PROPERTIES CAST-IRON BEHAVIOR HARDNESS STEEL ADI INSERTS Alloyed ductile iron Austempering Deep cryogenic treatment (DCT) Microstructure Mechanical properties
Indexed ByCSCD
Language英语
Funding Project[National High Technology Research and Development Program of China]
CSCD IDCSCD:6148888
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/150618
Collection中国科学院金属研究所
Affiliation1.东北大学
2.中国科学院金属研究所
Recommended Citation
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.
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