非调质高强度紧固件用双相钢盘条的试用

介绍非调质高强度紧固件用热轧双相钢盘条的试制工艺、组织和性能。对07Mn2SiV双相钢盘条拉拔后强度的变化规律进行研究,结果显示,该盘条初始变形的加工硬化率很高,经第1道次(ε=0.34)变形后,强度由剥壳后的680MPa提高到880MPa。用该双相钢盘条可生产8.8级M10,M14六角头螺栓和M8双头螺柱。

Trial Application of Dual-phase Steel Wire Rod for Non-quenched and Tempered Fasteners with High Strength

To introduce the trial production process ,the microstructure and properties of hot-rolled dual-phase steel wire rod for non-quenched and tempered fasteners with high strength. Strength variations of 07Mn2SiV dual-phase steel wire rod after drawing were researched, the results show that the initial working hardening rate of the wire rod is very high, the tensile strength rise from 680MPa of decorticated wire rod to 880MPa after the first pass deformation (true strain equals to 0.34) . Using the Dual-phase steel wire rod can produce 8.8 grade M10,M14 hexagon head tap bolts and M8 tapped studs.