|
KMID : 0896220030230010171
|
|
Journal of Daegu Health College
2003 Volume.23 No. 1 p.171 ~ p.183
|
|
|
Mechanical Properties of Overlayers by Carbide Addition in MIG Welding of Steel
|
|
Park Jeong-Sik
|
|
|
Abstract
|
|
|
|
It was attempted to improve the wear resistance of steel under the load condition by making a formation of the thick surface hardening alloy layers. The thick surface hardening alloy layers were formed on SS41C steel overlayed by MIG welding process with Cr_(3)C_(2) and WC powder addition. Effects of the dispersion of Cr_(3)C_(2) and WC powders on hardness and wear characteristics of the alloys were investigated. The following results were obtained. Most of Cr_(3)C_(2) powders are melted in the molten pool, and during solidification M_(23)C_(6) appeared. But, most of WC powders are dispersed nearly uniform as unmelted particles in the matrix alloy. With increasing addition of Cr_(3)C_(2) and WC powders, the hardness and specific wear resistance of the overlay weld alloys increased and reached H_(RC)58 at Cr_(3)C_(2)+WC powders addition rate of 70 g/min. It is considered that excellent wear resistance of the overlayed alloys was due to M_(23)C_(6) and dispersed WC powders and increased 7 times at Cr_(3)C_(2)+WC powders addition rate of 70 g/min than that of the powder-free overlaying layers.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|