轴承钢盘条冷镦套圈开裂原因分析及改进措施
发布时间：2018-10-22 11:33
【摘要】：Φ18 mm规格轴承钢盘条GCr15-Y在用户冷镦套圈毛坯时出现开裂,对开裂样品进行低倍、硬度、碳化物、断口、晶粒度等检测,发现断口存在过热组织,且套圈外壁晶粒度明显比基体晶粒度要粗,认为与原始盘条加热工艺即钢坯在加热过程中局部过热有关。在后续GCr15-Y生产过程中,通过对轴承钢坯料入炉位置进行优化、降低加热温度、控制高温段加热时间等措施控制原始盘条不产生过热组织,用户冷镦套圈未再出现开裂现象。
[Abstract]:桅 18 mm bearing steel wire rod GCr15-Y cracked when the user cold heading ring blank. The cracking sample was detected by low power, hardness, carbide, fracture and grain size, and the overheated structure was found in the fracture surface. The grain size of the outer wall of the ring is obviously larger than that of the matrix, which is related to the local overheating of the billet during the heating process of the original wire rod. In the following GCr15-Y production process, by optimizing the feeding position of bearing steel billet, lowering the heating temperature and controlling the heating time of high temperature section, the original wire rod does not produce overheated structure and the user cold heading ring does not crack again.
【作者单位】： 南京钢铁有限公司;
【分类号】：TG115
[Abstract]:桅 18 mm bearing steel wire rod GCr15-Y cracked when the user cold heading ring blank. The cracking sample was detected by low power, hardness, carbide, fracture and grain size, and the overheated structure was found in the fracture surface. The grain size of the outer wall of the ring is obviously larger than that of the matrix, which is related to the local overheating of the billet during the heating process of the original wire rod. In the following GCr15-Y production process, by optimizing the feeding position of bearing steel billet, lowering the heating temperature and controlling the heating time of high temperature section, the original wire rod does not produce overheated structure and the user cold heading ring does not crack again.
【作者单位】： 南京钢铁有限公司;
【分类号】：TG115
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