摘要
研究了Fe-Mn-C系TWIP钢的组织和性能,结果表明钢板经热轧-冷轧-热处理后,钢板可达到有57.3%的延伸率,480MPa的屈服强度和1140MPa的抗拉强度。其室温组织为单相奥氏体基体并伴有退火孪晶,拉伸变形后通过XRD检测和TEM观察发生了少量的γ→α和γ→ε→α相变同时内部有大量的滑移带和变形孪晶共存。即Fe-Mn-C系TWIP钢变形时同时有TRIP效应、TWIP效应,使钢板具有优良的力学性能。
The present paper investigated microstructure and mechanical properties of the Twinning Induced Plasticity（TWIP） Fe-Mn-C steel . The results showed that after hot-rolling-cold rolling-heat treatment, the steel had excellent mechanical properties： the tensile strength of the steel is about 1140MPa and the yield strength is higher than 480Mpa, while the elongation is above 57.3 %. The microstructure is composed of austenitic matrix and annealed twins at room temperature. After deformed, the phase transformation of γ→α and γ→ε→α were checked by XRD. At the same time, a amount of glide band and deformed twins were observed by TEM. That is to say the TRIP and the TWIP deform mechanisms play a role during deformation and result in excellent mechanical properties.
出处
《上海金属》
CAS
2007年第5期132-136,共5页
Shanghai Metals
