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用作金属高温成形加工的热作模具钢已逐步形成了一个特殊的合金钢类别。由于热作模具是在机械载荷和温度均发生循环变化的条件下进行工作,因此对热作模具材料提出了下列的性能要求。 (1)基本性能:热硬度、高温屈服强度、抗回火稳定性、韧性、抗氧化性等。 (2)工艺性能:耐热疲劳性能、抗热震性、耐磨性、对于熔融金属的侵蚀抗力等。热作模具种类繁多。常用的有:锤锻模、热压成型模、压铸模、热挤压模等,它们的
Hot work die steel used for metal high temperature forming has gradually formed a special alloy steel category. As the hot die is carried out under the conditions of mechanical load and temperature are cyclical changes, so the hot die material made the following performance requirements. (1) Basic properties: hot hardness, high temperature yield strength, anti-tempering stability, toughness, anti-oxidation and so on. (2) process performance: thermal fatigue resistance, thermal shock resistance, abrasion resistance, resistance to molten metal erosion and so on. A wide range of hot work die. Commonly used are: hammer forging, hot molding, die-casting mold, hot extrusion die, etc., they