论文部分内容阅读
我厂分厂L_D多辊冷轧机所用芯棒的外形尺寸为φ2-5mm×390mm和φ6-8mm×400mm,一般选用GCr15钢制造,经热处理后硬度要求达到HRc58～62°,全长弯曲度≯0.02mm,外经与中心线跳动允许偏差0.01mm。历来,L_D芯棒的热处理采用配重淬火法,但因L芯棒形状特殊,加之配重淬火时,工件因不断变换空间位置而有脱碳,氧化现象产生。同时,由于其他多种因素的影响,芯棒淬火后都有不同程度的弯曲变形,最大弯曲变形可达到10mm。弯曲
I plant factory L_D multi-roll cold rolling mill used mandrel rod dimensions φ2-5mm × 390mm and φ6-8mm × 400mm, generally made of GCr15 steel, the hardness after heat treatment requirements HRc58 ~ 62 °, full-length curvature ≯0.02mm, outside the center line beating tolerance of 0.01mm. Historically, L_D mandrel heat treatment using weight quenching method, but due to the special shape of the L mandrel, coupled with weight quenching, the workpiece due to the changing position of the space decarburization, oxidation phenomenon. At the same time, due to the influence of many other factors, the mandrel has different degrees of bending deformation after quenching, the maximum bending deformation can reach 10mm. bending