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一、前言钢材,合金和其他金属材料在进行热处理或热成型过程中,因氧化、脱碳、吸气及元素贫化等,造成金属损耗和机械性能剧烈下降是普遍的。合金结构钢,特别是弹簧钢因氧化脱碳,使硬度和疲劳强度大为下降。工具钢因氧化脱碳使硬度剧烈下降。不锈钢、高温合金因热处理产生的氧化皮不但难以除去,并且导致表面铬贫化而易产生晶界氧化。钛合金热处理产生的氧化皮也难以除去,并且吸氢使之脆性
I. Introduction Steel, alloy and other metal materials in the heat treatment or thermoforming process, due to oxidation, decarburization, inspiratory and elemental depletion, resulting in a sharp decline in metal loss and mechanical properties are common. Alloy structural steel, especially spring steel due to oxidation decarburization, the hardness and fatigue strength greatly reduced. Tool steel due to decarbonization so that the hardness decreased dramatically. Stainless steel, high temperature alloy oxide scale produced by heat treatment is not only difficult to remove, and lead to depletion of chromium surface and easy to produce grain boundary oxidation. The scale produced by the heat treatment of the titanium alloy is also hard to remove, and the hydrogen absorption makes it brittle