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我所与沈阳重型机器厂合作,在去年进行了锤击式碎矿机锤头耐磨面的硬质合金堆焊试验。经过多次试验,用配制的低碳钢芯塗铁合金药皮的电焊条堆焊后,堆焊层的硬度及红硬性均达到斯大林尼特硬质合金的指标。锤头经400～600℃预热后进行堆焊,可不产生或只产生极细微的横向裂纹,质量完全达到设计要求。堆焊焊条配方及所用原材料列于下表。原材料的粉碎、钝化及筛分粒度与
In cooperation with Shenyang Heavy Machinery Factory, we carried out the hardmetal surfacing test of hammerhead hammerhead wear surface last year. After several tests, with the preparation of low-carbon steel coated iron alloy coating electrode surfacing, surfacing layer hardness and red hardness have reached Stalinitte carbide indicators. Hammer by 400 ~ 600 ℃ after preheating surfacing, can produce or produce very fine horizontal cracks, the quality of fully meet the design requirements. Surfacing electrode formulations and raw materials used are listed in the following table. The smashing of raw materials, passivation and screening and particle size