Analysis of nitrogen-alloying deposited material of 1Cr13NbTi stainless steel

The nitrogen-alloying deposited material of 1Cr13NbTi stainless steel has been made though nitrogen replacing part of carbon and addition of the nitrogen-fixing elements of niobium and titanium.The precipitation behavior of carbonitride in the deposited alloy was analyzed,and the abrasive wear test of the hardfacing alloy was performed and the effect of carbonitride precipitates on the abrasive wear behaviour was studied.It was found that carbonitride particles were complex MX precipitate distributing on grain boundary and matrix of the deposited alloy with different number and size in as-welded and heat-treated conditions.In as-welded condition,primary carbonitride particles were readily precipitated from the deposited alloy with large size and morphology as they were formed during solidification.In heat treatment condition,a large number of secondary carbonitrides could precipitate-out with very fine size and great secondary hardening effect.The homogeneous distribution fine carbonitride could enhance markedly the hardness of the hardfacing alloy and decrease the depth of the grooving by the abrasive particles,that the abrasive wear resistance of the deposited alloy was improved effectively.