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我厂稀土中锰铁球机械化生产线是1976年建成投产的。通过长期的生产实践证明:机械化生产对稳定产品质量、提高生产效率、减轻劳动强度等,确有显著成效。一、产品质量及工艺条件 1.产品质量主要指标 (1)金相组织:马氏体+奥氏体(<20％)+索氏体(<15％)+碳化物(<10％)。 (2)机械性能:冲击值(20×20×110mm试棒)>0.8kg·m/cm~2;硬度HRC46～52。
I plant rare earth manganese iron ball mechanization production line put into operation in 1976. Through long-term production practice has proved that: mechanized production of stable product quality, improve production efficiency, reduce labor intensity, and indeed have significant results. First, the product quality and process conditions 1. The main indicators of product quality (1) Metallography: martensite + austenite (<20%) + sorbite (<15%) + carbide (<10%). (2) Mechanical properties: Impact value (20 × 20 × 110mm test bar)> 0.8kg · m / cm ~ 2; hardness HRC46 ~ 52.