铁路螺纹道钉和剪板机刀片螺栓型坯分别由φ20mm的Q235A和45圆钢经冷镦挤压和热胎模锻造成形。这种高效大量的压力加工,制件的质量及成本取决于模具的性能与寿命,最终取决于模具的选材及热处理质量。为提高制件的质量及生产成本,对这两种螺栓成形模具选材及热处理进行改进,具体内容如下。 Railway screw spikes and shears blade bolt parison respectively by φ20mm Q235A and 45 round bar by cold heading extrusion and hot tire forging forming. This high efficiency a lot of pressure processing, parts quality and cost depends on the performance and life of the mold, and ultimately depends on the selection of molds and heat treatment quality. To improve the quality of parts and production costs, the two bolt forming mold material selection and heat treatment to improve, as follows.