LI Dong-sheng
,
DAI Qi-xun
,
CHENG Xiao-nong
,
WANG Rong-rong
,
HUANG Yan
钢铁研究学报(英文版)
The kinetic curve of the high-temperature oxidation of austenitic stainless steel Cr18Ni11Cu3Al3MnNb at different temperatures was measured by weighting method. It is showed that the oxidation curves at 700 and 800 ℃ followed the parabolic law, and the steel presented an excellent anti-oxidation. The surface morphology and structure of the oxide film were studied by scanning electron microscopy and X-ray diffraction methods. A dense oxide film was attained at 700 and 800 ℃, mainly composed of the hexagonal Al2O3, Fe2O3, and a small amount oxide of Cr at 700 ℃. At 900 ℃ the oxide film started to delaminate, and was composed of (Cr,Fe)2O3 and the spinel CuCrMnO4 and Fe(Cr,Al)2O4.
关键词:
austenitic stainless steel
,
high-temperature oxidation
,
oxidation scale
,
cyclic oxidation
,
spinel
顾佳卿，黄俊霞，叶晓宁
钢铁研究学报
采用X射线衍射技术(XRD)研究了不同冷轧压下量对亚稳态奥氏体不锈钢00Cr17Ni7织构的影响，分析了亚稳态奥氏体不锈钢00Cr17Ni7中马氏体相和奥氏体相的织构变化情况。研究结果表明，不同冷轧压下量下，00Cr17Ni7中的奥氏体相织构主要由Brass{110}<112>、Goss{110}<001>和少量的Copper{112}<111>、S{123}<634>组成，并且随着压下量的增加Brass和Goss织构强度显著提高；同时马氏体相织构主要以{115}<110>、{112}<110> 、{111}<112>、{332}<113>组成，织构的形成主要归因于“Kurdjumov-Sachs取向关系”和“体心立方金属轧制织构类型演变的特点”共同作用的结果。
关键词:
奥氏体不锈钢
,
texture
,
cold rolling reduction
,
austenite phase
,
martensite phase
吴迪，李壮
钢铁
奥氏体不锈钢是难加工的材料。通过在传统的奥氏体不锈钢中添加硫、稀土和铋，经过钢锭熔炼、切削试验、组织性能检测，对其切削性能和力学性能进行了研究。结果表明，奥氏体不锈钢中的夹杂物主要由MnS组成。稀土包裹在MnS中，金属夹杂物铋以尾状物附于MnS的两端。稀土具有明显的变质作用，易切削奥氏体不锈钢中的夹杂物大部分呈球状或纺锤状。硫、稀土和铋合金元素的添加降低了切削力、减轻了刀具的磨损、改善了切屑的形状。所开发的合金获得了极好的切削性能。由于硫和铋都是软的相，在变形过程中它们并不诱发裂纹的形成。呈球状的夹杂物不仅有利于切削性能的改善，而且还有利于钢获得良好的力学性能。
关键词:
奥氏体不锈钢
,
rare earth
,
bismuth
,
machinability
,
mechanical property
