| In large-scale industrial production, the deterioration of materials caused by wear and tear of mechanical parts were considerable, and the downtime loss of production caused by replacing a number of scrapped parts was also significant. As a result, a kind of large area wear-resistant composite plate structure was widely used.a new manufacturing process of large area wear-resistant composite board was developed, and the method was called: alloy powder surfacing with self-shielded flux-cored wire welding.Orthogonal test had been made to analyze the several factors of self-shielded flux-cored wire welding process, and the parameters of the process were optimized. Then, fixing other parameters, the width and thickness of the alloy powder were adjusted in order to obtain the maximum formability of weld metal.The cross-section profile of the surfacing weld metal was extracted through VC + + program, and the dilution rate was obtained using the program called National Instruments Vision Assistant.Based on the research of alloy powder surfacing with self-shielded flux-cored wire welding process, the relations between the dilution rate and several processing parameters, such as the current, the voltage, the width and the thickness of alloy powder, etc, was obtained; At the same time, the effect of the processing parameters on the transition coefficient of C, Cr was obtained, as well as the proportion of primary carbide. Through calculation, the deposition efficiency of the new method was higher than ordinary single-wire self-shielded flux-cored wire welding technology. If the sing-wire deposition efficiency was higher than 10kg / h, a highly effective wear-resistant plate manufacturing methods could be called.Using the alloy powder surfacing with self-shielded flux-cored wire welding technology, the proportion of primary carbide could reach 65% -70%, the wear resistance coefficient could reach 6-8 times of the D237.
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