【摘要】：Φ18 mm規(guī)格軸承鋼盤(pán)條GCr15-Y在用戶(hù)冷鐓套圈毛坯時(shí)出現(xiàn)開(kāi)裂,對(duì)開(kāi)裂樣品進(jìn)行低倍、硬度、碳化物、斷口、晶粒度等檢測(cè),發(fā)現(xiàn)斷口存在過(guò)熱組織,且套圈外壁晶粒度明顯比基體晶粒度要粗,認(rèn)為與原始盤(pán)條加熱工藝即鋼坯在加熱過(guò)程中局部過(guò)熱有關(guān)。在后續(xù)GCr15-Y生產(chǎn)過(guò)程中,通過(guò)對(duì)軸承鋼坯料入爐位置進(jìn)行優(yōu)化、降低加熱溫度、控制高溫段加熱時(shí)間等措施控制原始盤(pán)條不產(chǎn)生過(guò)熱組織,用戶(hù)冷鐓套圈未再出現(xiàn)開(kāi)裂現(xiàn)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.
【作者單位】： 南京鋼鐵有限公司;
【分類(lèi)號(hào)】：TG115

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