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芯棒是我厂周期轧机轧管的主要工具。采用的材质为42CrMo钢。尺寸范围一般为φ140～320×4200～4800mm。它要求有较高的硬度、强度。每年消耗量约在4000吨左右。长期以来,在芯棒的生产和供应方面存在下列问题: 1.由于我厂原计划自制芯棒用的水压机车间没有建成,因此,全部芯棒都向外厂订货,主要的供货单位有二重厂、鞍钢、邢台冶机厂、齐钢等单位。以粗加工调质状态交货。调质费用非常昂贵,锻胚每吨价格为1250元,经粗加工调质以后,即高达2850元/T
Mandrel is the main mill rolling mill tube rolling cycle. The material used is 42CrMo steel. The size range is generally φ140 ~ 320 × 4200 ~ 4800mm. It requires a higher hardness, strength. Annual consumption of about 4,000 tons. For a long time, there were the following problems in the production and supply of mandrel: 1. Since the factory originally planned to manufacture self-made mandrel hydraulic machine workshop was not completed, all the mandrels were ordered to the outside plant, the main suppliers have two Heavy plant, Anshan Iron and Steel, Xingtai Machine Factory, Qi and other units. Rough quenched and tempered delivery status. Quenching costs very expensive, forging embryo per ton price of 1250 yuan, the rough after quenching and tending, that is up to 2850 yuan / T