| 护坡砖模具的制造一般都要经过锻造、切削加工、热处理等几道工序。为保证模具的制造质量，降低生产成本，其材料应具有良好的可锻性、切削加工性、淬硬性、淬透性及可磨削性；还应具有小的氧化、脱碳敏感性和淬火变形开裂倾向。 ① 可锻性 具有较低的热锻变形抗力，塑性好，锻造温度范围宽，锻裂冷裂及析出网状碳化物倾向低。 ② 退火工艺性 球化退火温度范围宽，退火硬度低且波动范围小，球化率高。 ③ 切削加工性 切削用量大，刀具损耗低，加工表面粗糙度低。 ④ 氧化、脱碳敏感性 高温加热时抗氧化怀能好，脱碳速度慢，对加热介质不敏感，产生麻点倾向小。 The manufacturing of the moulding brick mould of the protection grade brick mould is made by forging, cutting processing, heat treatment and so on. In order to ensure the quality of the mould and reduce the cost of production, the material should have good malleability, machinability, hardenability, hardenability and grindability. There should also be small oxidation, decarburization sensitivity and quenching deformation tendency. The malleability is of low heat forging deformation resistance, the plastic is good, the forging temperature range is wide, the forging crack is cold crack and the formation of the network carbide is low. The temperature range of the annealing process of annealing technology is wide, the annealing hardness is low and the fluctuation range is small, the spherification rate is high. There is a large amount of cutting processing, low cost of cutting tool and low surface roughness. Oxidation and decarburizing sensitivity high temperature heat is good, it is slow to decarbonate, it is not sensitive to the heating medium, and it has a low point tendency. |