High boron wear-resisting casting steel and preparation process thereof

Abstract

The present invention discloses one kind of antiwear high-boron cast steel and its preparation process. The antiwear high-boron cast steel has the chemical components including C 0.10-0.50 wt%, B 0.8-5.0 wt%, Cu 0.3-0.6 wt%, Mn 0.8-2.0 wt%, Cr 1.0-2.5 wt%, Si less than 1.5 wt%, Ti 0.08-0.20 wt%, Ce 0.04-0.12 wt%, Mg 0.02-0.18 wt%, N 0.06-0.18 wt%, S less than 0.05 wt%, P less than 0.05 wt%, and Fe and inevitable impurity for the rest. Its preparation process includes smelting in an electric furnace while adding ferromanganese, frrroboron and Al to deoxidize, composite modification of molten steel, fast cooling, and low temperature tempering to eliminate stress. The present invention has simple production process, low production cost and other advantages.

Description

technical field [0001] The invention belongs to the field of metal wear-resistant material manufacturing, and relates to a cast steel, in particular to a high-boron wear-resistant cast steel and a preparation method thereof. Background technique [0002] Due to the great danger of wear and failure of mechanical products, various industrial sectors have listed their wearable parts as key research topics. Improving the quality of materials resistant to abrasive wear is the key to improving the life of wearable parts. In terms of anti-abrasive wear materials, nickel-hard white cast iron and high-chromium white cast iron are widely used at home and abroad. Chinese invention patent CN1039267 has reported the composition and preparation technology of a kind of wear-resistant high-chromium cast iron, and the specific chemical composition (by weight percentage) of this cast iron is 2.9~3.2%C, 0.4~0.8%Si, 0.4~1.0%Mn , 1.2-2.0% Mo, 18.0-20.0% Cr, 4.0-5.0% V, 0.8-1.2% Cu, 0.05-0.5% RE...

AI Technical Summary

Problems solved by technology

However, the bonding strength between the boride-containing wear-resistant layer obtained by the surfacing process and the base material is low, and it is easy to crack or even peel off under impact wear conditions, while the boride-containing wear-resistant layer obtained by the surface boronizing process is thin and difficult to Resists heavy-duty high-stress abrasive wear