激情视频在线观看,一级a毛片免费观看,91corn在线高清国产,aV小四郎在线最新地址,台湾佬中文娱乐网22,偷拍国产精品熟妇牲交,老司机在线视av,欧美色福利导航一区

Previous Research Work on the Most Common Bearing Steel

Release Time：13 Aug,2025

<p style="text-align: center;"><img src="/ueditor/php/upload/image/20250813/1755079405841701.png" title="1755079405841701.png" alt="2.png"/></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">Previous investigations focused on the microstructural decay resulting from RCF with the most common bearing steel, grade 52100. The microstructure of 52100 steel comprises tempered carbides, residual cementite (RC), and a martensitic matrix. Types of microstructural decay identified during RCF include the formation of dark etching regions, white etching bands, and carbide dissolution (RC and tempered carbides). This decay becomes apparent after a high number of stress cycles, leading to a decrease in hardness and subsequent degradation of the bearing.</span></p><p style="text-align: justify;"><span style="font-family: arial, helvetica, sans-serif; font-size: 12px;">The ability of a material to withstand RCF depends on its composition and heat treatment. Using materials that resist softening can extend the lifespan of bearings. The Promise of Hybrid Steel In recent years, Ovako has introduced Hybrid Steel 60. This is a novel grade combining secondary hardening and intermetallic precipitates. It was developed to overcome the limitations of existing materials, particularly for bearings subject to challenging operational conditions such as in corrosion and hydrogen environments. However, a more comprehensive understanding of how it behaves under RCF is crucial to predict its response to cyclic loading. This was the basis for this PhD project which comprised extensive laboratory testing and analysis to identify how Hybrid Steel 60 decays under RCF.</span></p>