论文部分内容阅读
我厂生产的转8A货车弹簧,在热处理时是采用重油加热,因此弹簧与周围的加热介质接触会发生一定的化学反应,即脱碳与氧化反应。我厂用料是60Si2Mn或6OSiMnA等。Si有促进脱碳和石墨化的作用,Mn能提高弹簧钢的过热敏感作。表面氧化脱碳严重会影响弹簧的疲劳寿命,因此是值得注意的问题。 氧化是钢中金属元素在加热过程中与氧化气氛发生作用形成金属氧化物的一种现象,弹簧在600℃以上加热时,氧化膜不断增厚。金属氧化的过程往往伴随着表面脱碳现象,当氧化程度很大时,脱碳作用并不明
I plant the production of 8A truck spring, heat treatment is the use of heavy oil heating, so the spring and the surrounding heating medium will contact certain chemical reaction occurs, that is, decarbonization and oxidation reaction. I plant material is 60Si2Mn or 6OSiMnA and so on. Si has the role of promoting decarburization and graphitization, Mn can improve hyperthermal sensitivity of spring steel. Surface oxidation decarburization seriously affect the spring fatigue life, it is a matter of note. Oxidation is a phenomenon in which metallic elements in the steel react with the oxidizing atmosphere to form metal oxides during the heating process. When the spring is heated above 600 ° C, the oxide film is continuously thickened. The metal oxidation process is often accompanied by surface decarburization, when the degree of oxidation is very large, decarburization is not clear