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高铬铸铁泥浆泵衬板重1.5t直径2300mm,在铸件清理时因方法不当而敲坏,损坏面为310×40×40mm(下图)。衬板化学成分(％)为:C2.24,Mn0.88、Si0.60、P0.028、S0.06、Cr15.18、Mo1.93、Cu1.19。泥浆泵是承受冲击和磨损的部件,堆焊层应能承受较大的冲击和磨损,硬度HS≥62。焊前准备 1.铸件消除铸态应力退火。 2.消除缺口处油、锈、水、氧化皮杂质。并用砂轮打磨缺口处,直至露出金属光泽。 3.选用直流电焊机,并将焊钳用木棒接
High chromium cast iron mud pump liner weighs 1.5t diameter of 2300mm, in the casting cleanup improper and knocked bad, damaged surface is 310 × 40 × 40mm (below). Liner chemical composition (%): C2.24, Mn0.88, Si0.60, P0.028, S0.06, Cr15.18, Mo1.93, Cu1.19. Mud pump is to withstand the impact and wear parts, surfacing layer should be able to withstand greater impact and wear, hardness HS ≥ 62. Preparation before welding 1. Casting eliminate as-cast stress annealing. 2. Eliminate the gap at the oil, rust, water, scale impurities. Grind the notch with a grinding wheel until the metallic luster is exposed. 3. Use DC welding machine, and the welding clamp with a wooden bar