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| Study on Microstructure of Heavily Drawn Pearlite Steel Wire |
| TU Yiyou1，JIANG Jianqing1，CAI Lei2，BIAN Jianchun2 |
| 1. Jiangsu Key Laboratory for Advanced Metallic Materials， Southeast University， Nanjing 211189, Jiangsu, China;2. Fasten Group， Jiangyin 214433, Jiangsu, China |
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Abstract The microstructure of havily drawn SWRH72A wire was studied with SEM. The change of mechanical properties and magnetic properties of the wire with the increase of drawing strain were investigated. The results show that the interlamellar spacing of pearlite is decreased progressively during the cold drawing. Tensile strength,coercive force and residual magnetization of the wire are increased with increasing drawing strain.When the strain was small, the saturation magnetization of the wire was almost unchanged,227.87 emu/g.But increased to 233.55 emu/g with the strain increasing to 2.60.As calculated,that part of cementite was decomposed in heavily drawn SWRH72A steel.
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Received: 01 January 1900
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2008, Vol. 43 
