论文部分内容阅读
近年来,由于检测手段不断完善,生产实践逐渐丰富,对铸造高锰钢ZGMn13的热处理工艺,取得了许多有益的验证,但也出现了一些值得研究的问题。例如,文献称,水韧淬火后的高锰钢ZGMn13试件,分别在不同温度回火,600℃脆性相析出最多,抗拉强度、延伸率、断面收缩率、冲击值降到最低点,冲击磨损量与硬度达最高值。因此认为,淬火加热时,在650～700℃均温有增加裂纹的倾向,而且需要延长高温溶解碳化物时间,加重表层脱碳、脱锰、氧化;降低耐磨性等问题,故一律取消在650～700℃均温,改为<600℃入炉4h,直接升温至1050～1100℃(～260℃/h)再保温3h淬火,可减少裂纹倾向。
In recent years, due to continuous improvement of testing methods and production practices, the heat treatment process of casting high manganese steel ZGMn13 has obtained many useful verifications, but some problems worthy of study have also emerged. For example, the literature states that the specimens of high manganese steel ZGMn13 after tempering are respectively tempered at different temperatures and the most brittle phase is precipitated at 600 ℃. The tensile strength, elongation, reduction of area and the impact value drop to the lowest point, Wear and hardness up to the highest value. Therefore, quenching and heating, the average temperature at 650 ~ 700 ℃ tend to increase the crack, but also need to extend the high temperature dissolved carbide time, increase surface decarburization, de-manganese, oxidation; reduce wear resistance and other issues, it will be canceled 650 ~ 700 ℃ average temperature, to <600 ℃ furnace 4h, directly heated to 1050 ~ 1100 ℃ (~ 260 ℃ / h) and then incubated for 3h quenching, can reduce the tendency of cracks.