新闻资讯
42CrMoVNb细晶高强钢的疲劳行为
| 42CrMoVNb细晶高强钢的疲劳行为FATIGUE BEHAVIOR OF FINE--GRAINED HIGH STRENGTH STEEL 42CrMoVNb 研究了不同热处理制度下得到的3种晶粒尺寸的42CrMoVNb细晶高强钢的疲劳性能. 结果表明, 它们的光滑疲劳试样S--N曲线在10 6---10 7周期范围内无平台出现, 疲劳极限消失. SEM断口观察表明, 光 滑试样疲劳裂纹起源位置与寿命长短密切相关, 测量了长寿命试样疲劳断裂源夹杂物的位置及尺寸. 通过对实验数据的初步分析, 给出了夹杂物 及奥氏体晶粒尺寸应控制的水平. The fatigue properties of high strength steel 42CrMoVNb with three fine grain sizes produced by different heat treatment procedures were studied. The experimental results illustrate that at 10 6---10 7 cycles regime, there is no horizontal asymptote in fatigue S--N curves for smooth specimens, so the conventional fatigue limit disappears. SEM shows the fatigue crack initiation sites in smooth specimens are related closely to fatigue life, and most of the sites are at inclusions. From analyzing the experimental data, the critical size of inclusion and the most appropriate size of prior austenite, which should be controlled in practical production, are obtained. 全文下载：http://pan.baidu.com/s/1ge1dXDL 作为值得信赖的合作伙伴和高品质金属合金的半成品供应商，艾荔艾拥有完善的服务体系和专业的团队。在同客户交易的过程中，我们力求根据不同的应用需求将我们的产品做到精益求精。针对当前和未来的市场需求，艾荔艾致力于为客户提供最佳的金属材料解决方案。 AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges. 获取更多我们供应的合金和服务信息，请致电086-021-67660801或发电子邮件kefu@ailiaigroup.com联系我们，您也可以通过微博，微信，领英，XING，脸书和推特与我们互动。 For more information on the alloys and services that we supply, call us at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on Weibo, Weixin, LinkedIn, XING, Facebook and Twitter. |