热轧变形对高碳TWIP钢组织缺陷和力学性能的影响  

Effect of hot rolling deformation on microstructure defects and mechanical properties of high carbon TWIP steell

作　　者：易炜发[1] 朱定一[1] 胡真明 杨泽斌[1] 林淑梅[1] 

机构地区：[1]福州大学材料科学与工程学院,福州350108 [2]福建省三钢(集团)有限责任公司,三明365000

出　　处：《材料科学与工艺》2011年第5期45-49,共5页Materials Science and Technology

基　　金：福建省高校产学合作科技重大项目(2011H6012);福建省自然科学基金资助项目(2011J01292)

摘　　要：为解决高碳Fe-20Mn-3Cu-1.3C TWIP钢凝固组织中易形成显微疏松、损害合金的力学性能的问题,研究了在相同热轧温度下,改变轧制变形总量对合金微孔缺陷的消除及拉伸力学性能的影响.研究表明:通过热轧变形可以有效地减少Fe-20Mn-3Cu-1.3C TWIP钢的微孔缺陷,提高组织致密度;随着热轧变形量的增加,合金的综合力学性能显著提高,当热轧变形量达到91%时,该合金中的微孔面密度由固溶态的1.67%降低至0.71%,抗拉强度达到1223.7 MPa,延伸率达到86.8%,强塑积高达106217.2 MPa.%,比未热轧变形处理提高了78.3%,显示出优异的综合力学性能,表明消除微孔缺陷是充分发挥其高强韧性的关键.To eliminate the easily formed micropore in the solidification structure,which severely deteriorates the mechanical properties of high carbon Fe-20Mn-3Cu-1.3C TWIP steel,the effect of different hot rolling reduction at the same deformation temperature on micropore elimination and tensile mechanical properties was studied.The results indicate that hot rolling deformation can remove micropore effectively and make the microstructure much denser.The comprehensive mechanical properties are greatly enhanced with the increasing of hot rolling reduction.When the hot rolling reduction comes to 91%,the area density of micropore in solution state decreases from 1.67% to 0.71%,the tensile strength and elongation rate reaches 1223.7 MPa and 86.8%,respectively,and the strength-plasticity product achieves 106217.2 MPa·% which is about 78.3% higher than that of non-hot rolled steel.This shows that micropore elimination is the key factor to improve high strength and toughness of Fe-20Mn-3.0Cu-1.3C TWIP steel.

关 键 词：TWIP钢 微孔缺陷 热轧变形量 显微组织 力学性能 

分 类 号：TG335.11[金属学及工艺—金属压力加工]