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Yang J.,Nantong Institute of Supervision and Inspection on Product Quality | Xiao L.,Jiangsu Juli Steel Wire Rope Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2012

Cupulate fracture of steel wire was studied by metallography examination and SEM method. The results show that main cause for cup-cone fracture of steel wire includes inclusions, loose structure, carbon segregation and improper drawing process which lead to "V" type crack in center of the steel wire, and cupulate fracture is formed there. Source


Yu Q.,Northeastern University China | Yang J.,Nantong Institute of Supervision and Inspection on Product Quality
Jinshu Rechuli/Heat Treatment of Metals | Year: 2012

In order to accurately detect the grain size of high carbon steel wire rods, direct etching method and direct hardened method were compared. The results show that the direct etching method shows the size of pearlity group, while direct hardened method shows the size of austenitic grain. Grain boundary is more clear and evaluation results is more accurately by direct hardened method than direct etching method. Direct hardened method were suggested to detect austenitic grain size of high carbon steel wire rods. Source


Yang J.,Nantong Institute of Supervision and Inspection on Product Quality | Xiao L.,Jiangsu Juli Steel Wire Rope Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2013

Brittle fracture of high carbon steel wire rod was studied by metallographic analysis. The results show that main cause for brittle fracture of high carbon steel wire rod is martensite transformation in surface of high carbon steel wire rod due to impacting and friction during the transportation. The corresponding countermeasures are also proposed in this article. Source


Yang J.-Y.,Nantong Institute of Supervision and Inspection on Product Quality | Ling C.,Nantong Institute of Supervision and Inspection on Product Quality | Tang J.-Z.,Jiangsu Xingda Steel Tyre Cord Co. | Ni C.,Jiangsu Xingda Steel Tyre Cord Co. | Xiao L.-C.,Jiangsu Xingda Steel Tyre Cord Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2012

The morphologies and nonmetallic inclusions type and their effects on fracture behavior of wire rod for steel cord were studied by optic microscope and scanning electron microscope. Tensile strength of the wire rod was measured. The fractured surfaces of wire rod were cup-like and tear-like during service. Crack originated at the interface between nonmetallic inclusions and matrix. Crack was prone to expand rapidly along inclusions during the subsequent process, which led to rupture of steel cord. Source

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