The Paton Welding Journal, 2014, №12



2014 №12 (01)

DOI of Article 10.15407/tpwj2014.12.02

2014 №12 (03)

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The Paton Welding Journal, 2014, #12, 8-10 pages  

Tribotechnical properties of deposited metal of 50Kh9S3G type with increased sulphur content

V.V. Osin

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
Steels alloyed with sulphur (for instance, silchrome) are widely applied in manufacture of tools for cold rolling of metal. Their reconditioning repair requires materials ensuring deposited metal composition close to that of baze metal. The work is a study of sulphur influence on tribotechnical properties of deposited metal of 50Kh9S3G type. Sulphur content in the deposited metal was varied in the range of 0.02 to 1.70%. Investigations revealed that sulphur forms complex sulphides, which prevent seizure of interacting metal surfaces, thus increasing deposited sample wear resistance. To ensure optimum tribotechnical properties of deposited metal, volume content of complex sulphides of the main alloying elements should be within 1.5 to 2.0 %, and their dimensions should be ≤0.02 mm. This condition is ensured at total content of sulphur of 0.5-0.8 % in the deposited metal. At lower sulphur content the quantity of forming sulphides is insufficient to make an essential influence on deposited metal properties. At higher sulphur content the forming coarse sulphide inclusions are less strongly retained by deposited metal matrix and during testing they crumble and are removed from the wearing zone. This adversely affects wear resistance of deposited metal and contacting part. 10 Ref., 2 Tables, 3 Figures.
 
 
Keywords: deposition, deposited metal, sulphur alloying, sulphides, tribotechnical properties
 
 
Received:                20.10.14
Published:               29.12.14
 
 
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