文档介绍：机电职业技术学院
毕业设计(论文)
作者: 学号:
系部: 模具技术系
专业: 材料成型与控制
题目: 不锈钢的固溶渗氮技术
导者:
评阅者:
年月
摘要
不锈钢从20世纪初发明至今不足百年的时间,但其发展和应用的势头却异常迅猛。特别是从20世纪60年代末以来,全世界不锈钢的产量基本保持年均4%的增长率,不锈钢的应用范围逐步扩大到了国民经济的各个领域。不锈钢之所以能得到如此迅猛的发展,一个重要的因素是其具有耐蚀、耐热性。不锈钢热处理工艺的优劣对不锈钢的耐蚀、耐热性有很大影响,而且对不锈钢的加工性能起着决定性的作用。因此,不锈钢的热处理工艺在不锈钢的生产过程中一直处于十分重要的地位。
奥氏体不锈钢的高塑性、高耐蚀性、良好的焊接性能、韧性和和低温韧性、无磁性、易加工的优点,使其在石油、化工、、耐磨性较差,使用受到一定的限制。为了提高奥氏体不锈钢的硬度和耐磨性,应用较多的是对奥氏体不锈钢表面进行氮化处理。传统的不锈钢氮化工艺虽然提高了不锈钢的硬度,却在氮化层中析出了氮化物,由于氮化物在奥氏体晶界择优生长,消耗了铬,导致奥氏体基体中的铬减少,结果使不锈钢的耐蚀性下降采用固溶渗氮工艺不但提高了奥氏体不锈钢的硬度和耐磨性,而且提高了其耐蚀性能。
关键词: 不锈钢固溶渗氮硬度耐磨性
Title: Stainless steel solid solution nitriding
Abstract:
Stainless steel from the beginning of the twentieth Century invention has less than a hundred years, but its development and application of the momentum very quickly. Especially from the een sixties since the end of the world, stainless steel production base to maintain an average annual growth rate of 4%, the application of stainless steel is gradually extended to all areas of the national economy. Stainless steel can be so swift and violent development, an important factor in its corrosion resistance, heat resistance. Stainless steel heat treatment process the quality of stainless steel corrosion resistance, heat resistance have great influence on the processing of stainless steel, but also plays a decisive role in the performance. Therefore, stainless steel heat treatment technology in stainless steel production process has been in a very important position.
Austenitic stainless steel with high plasticity, high corrosion resistance, good welding performance, toughness and low temperature toughness, non-ic, easy processing advantages, so that in the petroleum, chemical, food and pharmaceutical industries are widely used. But due to low hardness, wear resistance of austenitic stainless steel is used, subject to certain restrictions. In order to improve the hardness and wear resistance of austenitic stainless steel, is wi