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首页> 外文期刊>ISIJ international >Effects of Silicon and Manganese Contents on V-Bending in High-Strength TRIP-Aided Dual-Phase Steel Sheets with Polygonal Ferrite Matrix
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Effects of Silicon and Manganese Contents on V-Bending in High-Strength TRIP-Aided Dual-Phase Steel Sheets with Polygonal Ferrite Matrix

机译：硅和锰含量对多边形铁氧体基质高强度跳闸双相钢板V型的影响

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摘要

Effects of silicon and manganese contents on V-bending in high-strength TRIP-aided dual-phase (TDP) steel sheets with polygonal ferrite matrix were investigated for automotive applications. V-bending test was performed on a hydraulic testing machine at a processing speed of 1 mm/min, using a rectangular specimen (50 mm in length, 5 mm in width, 1.2 mm in thickness), 88-degree punch (2.0 mm in punch radius), and 88-degree die (12 mm in die width, 0.8 mm in die radius). The main results are as follows.(1) The 0.2C-(1.0–2.5)Si-(1.0–2.0)Mn, mass% TDP steel sheets were able to perform V-bending by strain-induced martensitic transformation of TRIP effect. On the other hand, ferrite-martensite dual-phase (MDP0) steel sheet of 900 MPa grade was not able to perform 90-degree V-bending because of initiation of crack on an outer surface.(2) The 0.2C- 2.5Si-1.5Mn, mass% TDP-G steel sheet of 980 MPa grade was able to enable the 90-degree V-bending that considered an amount of springback (Δθ = θ _(1) ? θ _(2)), in which the θ _(1) and the θ _(2) are a bending angle on loading and a bending angle after unloading respectively, of more than 2-degree by controlling a displacement of punch bottom dead center.
机译：研究了硅和锰含量对具有多边形铁氧体基质的高强度跳闸双相（TDP）钢板V型v型的影响进行了汽车应用。使用矩形样品（长度为5mm，厚度为1.2mm，厚度为5mm），以1mm / min的处理速度在液压试验机上进行V型弯曲试验。冲头半径）和88度模具（模具宽度为12 mm，管芯半径为0.8mm）。主要结果如下。（1）0.2C-（1.0-2.5）Si-（1.0-2.0）Mn，质量％TDP钢板能够通过应变诱导的跳闸效果的马氏体转变进行V型抗弯曲。另一方面，由于在外表面上启动裂缝，铁氧体 - 马氏体双相（MDP0）钢板不能执行90度V弯曲。（2）0.2C-2.5SI -1.5Mn，980MPa级的质量％TDP-G钢板能够使得90度V型弯曲，其考虑回弹量（Δθ= θ_（1）？θ_（2）），其中θ_（1）和θ_（2）是弯曲角度，分别在卸载后的弯曲角度超过2度控制冲头底死中心的位移。

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