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本文介绍了根据金属学原理研究试验出的,适合不同硅含量的硅钢片铁心极面长期防护的气体氮化工艺,即在570±10℃.30～45%氨分解率的条件下,保温3小时后取包空冷的工艺。经本工艺氮化的国产硅钢片D4、D2、日本硅钢片(1.6%si)、西德硅钢片(1.89%Si)铁心除表面生成一薄层(约60μm)抗蚀耐磨的氮化层(铁磁性物质)外,基体成分和组织不变,因此对铁心电性能影响很小,并能有效地提高铁心的机械寿命。其中,材料为D4的QJ2-A自耦减压起动器氮化失压铁心已经过十五年的工业运行。对QJ2-A和DW10两个系列失压铁心试验的结累都显示了很好的技术经济效果。
This paper presents a gas nitriding process based on the study of metallurgical principles and suitable for the long-term protection of silicon steel iron pole face with different silicon content. Under the conditions of 570 ± 10 ℃ .30 ~ 45% ammonia decomposition rate, the thermal insulation 3 After hours to take cold air bag process. The nitrided domestic silicon steel sheets D4 and D2, Japanese silicon steel sheets (1.6% Si) and West German silicon steel sheets (1.89% Si) have a surface of a thin layer (about 60 μm) (Ferromagnetic material), the matrix composition and structure of the same, so the iron core electrical performance is very small, and can effectively improve the mechanical life of the core. Among them, the material for the Q4 Q4-D auto-decompression starter nitrided core has been 15 years of industrial operation. On the QJ2-A and DW10 two series of non-pressure core test results show a very good technical and economic results.