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我厂是工具厂,锻造铣刀等材料多为热轧钢棒料,生产锻件重量常在10公斤以下,来厂的原材料,由于外形尺寸及炭化物偏析级别的不合格,因此这些材料要求锻造,锻造的目的是达到产品的外形尺寸和达到炭化物偏析级别的规定。由于高速钢是高合金钢及其共晶复合炭化物的存在使高速钢的塑性变坏,即可锻性变差,因此我们对高速钢的压力加工必须注意工作中的每一个细节。一、锻前锻坯尺寸的选择锻坯尺寸长度大于直径,便于在第一次镦拔中采用先镦后拔的工序,这可以达到以下目的: 1.经过高温区较长时间加热的锻坯外表
Our factory is a tool factory, forging cutter and other materials are mostly hot-rolled steel bar, forgings weight often less than 10 kilograms, to plant raw materials, due to the size and carbide segregation level of unqualified, so these materials require forging, The purpose of forging is to achieve the product dimensions and to achieve the level of carbide segregation regulations. Due to the high-speed steel is the high-alloy steel and its eutectic compound carbide in the presence of the high-speed steel plastic deterioration, that is, forgivability deteriorates, so our high-speed steel pressure processing must pay attention to every detail of the work. First, the choice of forging preform size Forging billet size length is greater than the diameter, easy to use the first upsetting in the first upsetting after the pulling process, which can achieve the following objectives: 1. After a long time heated high temperature blank Appearance