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本文探讨了采用型内球化、型内孕育和铜钼合金化的方法生产6110柴油机球铁曲轴。文中介绍了曲轴的化学成分的控制范围、热处理规范及型内球化和型内孕育的工艺参数。试验结果显示出本曲轴所应用的各种工艺措施对改善石墨球形态和基体组织起到有益的作用,从而促使其机械性能比包内球化的铜钼合金球铁有所提高。曲轴法兰端部分(Φ130)所测得金相组织和机械性能如下:球化类型——2级;石墨球大小——2级,珠光体量——90～95％;磷共晶及渗碳体量——0.5～1.0％;σ_b——90.5～93.0kg/mm~2;δ——3.35～4.80％;HB——269～292。
This article explores the production of 6110 diesel ductile iron crankshafts by means of internal balling, internal inoculation and copper-molybdenum alloying. This paper introduces the control of the chemical composition of the crankshaft, heat treatment specifications and type of ball and the type of inoculation process parameters. The test results show that the various technological measures applied to the crankshaft play a beneficial role in improving the morphology and matrix organization of graphite spheres, thereby promoting the mechanical properties of the spheres to be better than that of the spheroidized copper-molybdenum alloy ductile iron. The measured microstructure and mechanical properties of the crankshaft flange end (Φ130) are as follows: Type of spheroidization - Grade 2; Size of graphite spheres - Grade 2, amount of pearlite - 90 to 95%; Phosphorus eutectic and permeation Carbon volume - 0.5-1.0%; σ_b - 90.5-93.0 kg / mm 2; δ - 3.35-4.80%; HB - 269-2992.