Carbide Spray Coating Influence on Wear Behavior of Carburized Steel against Two Counter-Rollers

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Please use this identifier to cite or link to this item: https://irlib.pccu.edu.tw/handle/987654321/30874

Title:	Carbide Spray Coating Influence on Wear Behavior of Carburized Steel against Two Counter-Rollers
Authors:	Chiu, Liu-Ho Yeh, Shu-Hung Chen, Bo-Rong Chang, Heng
Contributors:	Dept Mech Engn
Keywords:	carburizing carbide coating wear counter-roller
Date:	2015
Issue Date:	2015-11-03 16:43:35 (UTC+8)
Abstract:	The wear behavior of carburized SNCM 220 steel subjected to cold treatment and carbide spray coating is investigated. WC/Co coatings in 15 +/- 5 mu m thickness were deposited on SNCM 220 specimens in a high velocity oxy-fuel (HVOF) process. Specimens were subjected to wear test under normal loads of 95.9 N at 180 rpm on a dry block-on-roller tester and to two different counter-roller materials with hardness values of 42 and 60 HRC. Wear test result after 12 h showed that the cumulative mass loss measurement of carburized SNCM 220 under 188 K subzero treatment was 15 mg, improved from 37 mg mass loss of SNCM 220 steel without cold treatment. In addition, the cumulative mass loss of carburized SNCM 220 specimens with sprayed carbide coating decreased from 37 mg to 4 mg. Moreover, wear tested specimens with HVOF coatings countered with 42 HRC rollers have resulted higher mass losses than those countered with 60 HRC rollers. Analysis of the wear microstructures has revealed the effects of the cold treatment and HVOF coatings. It has shown that 42 HRC counter roller induced plastic deformation on the specimen surface, which is detrimental to the specimen wear resistance. The compatibility of counter-roller and specimen hardness becomes the major factor to improve the wear of SNCM 220 steel.
Relation:	MATERIALS TRANSACTIONS 卷: 56 期: 3 頁碼: 333-339
Appears in Collections:	[機械工程系暨機械工程學系數位機電研究所] 期刊論文

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