装载机铲斗切削刃用钢IE921装载机铲斗左、右切削板，主切削刃，左、右切削刃以及底部耐磨板常与泥砂、石块摩擦产生剧烈磨损和冲击。因此，要求所选材料的淬透性要好，热处理后的表面硬度高、淬硬层深、耐磨性好和使用寿命长。由于零件需要焊接在铲斗上，所以又要控制好材料的 Loader Bucket Cutting edge steel IE921 Loader bucket left and right cutting board, the main cutting edge, left and right cutting edge and the bottom of the wear plate often with sand, stone friction produces severe wear and impact. Therefore, the hardenability of the selected material is required to be good, high surface hardness after heat treatment, deep hardened layer, good wear resistance and long service life. Since the parts need to be welded on the bucket, they have to control the material