保持基体不发生相变,强化钢铁机械零件和工模具表面的方法,国内外以渗氮为主的技术并存着气体渗氮,液、气体氮碳共渗和离子渗氮等。但这些工艺尚有各自的不足。有的不适用于碳钢,处理时间太长,且表层脆性大;有的渗层较薄,表面硬度低,耐蚀、耐磨性差。对一些异形件表面强化难以得到满意的结果。在离子轰击炉中通入一定比例纯氨和丙酮蒸气,配以合理工艺参数完成的离子氮碳共渗,是我们近些年来研究的新成果,经在有大面积深长狭缝的织机针板、深孔细长形挤塑机螺杆套筒和多孔异形型腔的压铸模上应用,效果极好,深受用户欢迎。 Maintaining the substrate does not happen phase change, strengthening the surface of the steel machinery parts and tooling methods, both at home and abroad to nitriding-based technology coexist gas nitriding, liquid, gas nitrocarburizing and ion nitriding. However, these processes still have their own deficiencies. Some do not apply to carbon steel, the treatment time is too long, and the surface brittleness; some layer of thinner, low surface hardness, corrosion resistance, poor wear resistance. Some shaped pieces of the surface hardening difficult to get satisfactory results. In ion bombardment furnace access to a certain percentage of pure ammonia and acetone vapor, with reasonable parameters of the completion of the ion nitrocarburizing, is our new research in recent years, after a large area in the long slit loom needle Board, deep-hole elongated extruder screw sleeve and porous profiled cavity die-casting mold on the application, the effect is excellent, welcomed by users.