锻压技术

车用高碳钢冷拔形变中的力学性能和组织演变分析

英文标题：Analysis on mechanical properties and microstructure evolution for automotive high carbon steel in cold drawing

作者：杨晋平

单位：山西交通职业技术学院

分类号：TG142

出版年,卷(期):页码：2019,44(12):182-186

摘要：

为提高汽车轮胎上冷拔高碳钢的力学强度与高韧性，通过拉伸力学、SEM、TEM和DSC等测试手段分析了不同应变与回火条件下得到的冷拔高碳钢组织结构与力学特性的改变规律，并表征了不同工艺条件下对应的组织结构与性能。研究结果表明：随着应变的增加，回火处理能达到的高碳钢拉伸强度提高比例逐渐减小；回火处理可以提高冷拔高碳钢强度，但会引起塑性的略微降低；经过175 ℃回火处理后，片状珠光体还是与拉拔方向持平行状态，渗碳体片层内生成了许多纳米级渗碳体颗粒；在150 ℃回火后，原位再结晶形成纳米颗粒与偏析C可以对位错产生较强的钉扎作用，显著提高高碳钢的变形抗力。应变为3.0时，高碳钢只形成了2个放热峰；应变为5.0时形成了3个放热峰。

In order to improve the mechanical strength and toughness of cold drawing high carbon steel on automobile tires, the changes of microstructure and mechanical properties of cold drawing high carbon steel obtained under different strain and tempering conditions were analyzed by tensile mechanics, SEM, TEM and DSC, and the corresponding microstructure and properties under different process conditions were characterized. The results show that with the increasing of strain, the proportion of tensile strength for high carbon steel increased by tempering is smaller, and the tempering treatment improves the strength of cold drawing high carbon steel to cause a slight reduction in plasticity. After tempering at 175 ℃, the lamellar pearlite is still in parallel with the drawing direction, and many nanoscale cementite particles are formed in the lamellar cementite. However, after tempering at 150 ℃, nanoparticles and segregation C formed by in-situ recrystallization can produce strong pinning effect on dislocations, and significantly improve the deformation resistance of high carbon steel. Thus, when the strain is 3.0, only two exothermic peaks are formed in high carbon steel, and when the strain is 5.0, three exothermic peaks are formed.

基金项目：

山西省自然科学基金资助项目(20140321014-02)

杨晋平（1973），男，硕士，讲师 E-mail：pangshanmei079049@126.com

参考文献：

［1］王林烽,周立初,陈华青,等. Φ5.35 mm-2100 MPa桥梁用锌铝高碳钢的工艺与组织性能
［J］.钢铁,2019,54(2):90-96.

Wang L F，Zhou L C，Chen H Q，et al. Manufacturing technology,microstructural and mechanical properties of Φ5.35 mm-2100 MPa grade hot galvalume steel wire for bridge cable
［J］. Iron & Steel,2019,54(2):90-96.

［2］Borchers C,Kirchheim R. Cold-drawn pearlitic steel wires
［J］. Progress in Materials Science,2016,82: 405-444.

［3］Han Y,Wang K S. Effect of cold stretching on fatigue properties of type S31603 austenitic stainless steel at high temperature
［J］. Procedia Engineering,2015,130: 1075-1080.

［4］Zhang X D,Godfrey A,Liu W,et al. Study on dislocation slips in ferrite and deformation of cementite in cold drawn pearlitic steel wires from medium to high strain
［J］. Materials Science and Technology,2011,27(2): 562-567.

［5］Zhou L,Fang F,Zhou X,et al. Cementite nano-crystallization in cold drawn pearlitic wires instigated by low temperature annealing
［J］. Scripta Materialia,2016,120: 5-8.

［6］Lamontagne A,Massardier V,Sauvage X,et al. Evolution of carbon distribution and mechanical properties during the static strain ageing of heavily drawn pearlitic steel wires
［J］. Materials Science and Engineering: A,2016,667: 115-124.

［7］佘学兵,李喜宝,冯志军.ANSYS软件仿真分析转子钢在热处理中性能变化
［J］.科技通报,2018,34(2):133-136.

She X B,Li X B,Feng Z J.ANSYS software simulation analysis of performance changes of rotor steel during heat treatment
［J］. Science and Technology Bulletin,2018,34(2):133-136.

［8］王利军,阮士朋,王宁涛,等.高强度螺栓用非调质钢的研制与应用
［J］.钢铁,2018,53(11):102-106.

Wang L J,Ruan S P,Wang N T,et al. Development and application of non-quenched and tempered steel for high strength bolts
［J］. Steel,2018,53(11):102-106.

［9］师周龙,张英建,徐乐,等.10.9级贝氏体型非调质钢U形螺栓的试制
［J］.钢铁研究学报,2013,25(11):57-62.

Shi Z L,Zhang Y J,Xu L,et al. Trial production of 10.9 class bayes shape non-quenched-tempered steel U-bolt
［J］. Chinese Journal of Steel Research,2013,25(11):57-62.

［10］Joung S W,Kang U G,Hong S P,et al. Aging behavior and delamination in cold drawn and post-deformation annealed hyper-eutectoid steel wires
［J］. Materials Science and Engineering: A,2013,586: 171-177.

［11］Fang F,Zhou L,Hu X,et al. Microstructure and mechanical properties of cold-drawn pearlitic wires affect by inherited texture
［J］. Materials & Design,2015,79: 60-67.

［12］Fang F,Zhao Y,Zhou L,et al. Texture inheritance of cold drawn pearlite steel wires after austenitization
［J］. Materials Science and Engineering: A,2014,618: 505-510.

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