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1Cr11Ni2W2MoV马氏体不锈钢冷拉棒材的力学性能研究

发表时间:2022-09-29  浏览量:394  下载量:41
全部作者: 刘军凯,孙信阳,申明明,史咏鑫,王守明,王敏
作者单位: 中航上大高温合金材料股份有限公司,高温合金再生新技术和新型变形材料联合实验室, 河北省耐蚀合金材料重点实验室
摘 要: 利用拉伸实验、硬度实验和光学显微镜等手段对1Cr11Ni2W2MoV马氏体不锈钢冷拉棒材的显微组织和力学性能进行分析。实验结果表明:在位错强化和细晶强化的双重作用下,随着冷拉变形量的增加,1Cr11Ni2W2MoV马氏体不锈钢棒材的抗拉强度、屈服强度和硬度逐渐增加,其棒材晶粒度也随之变细。经过退火和调质之后,当冷拉拔棒材累计变形量达到57.96%时,抗拉强度(Rm)、屈服强度(Rp0.2)、断后伸长率(A)、断面收缩率(Z)和布氏硬度分别达到了1 087 MPa,903 MPa,16.5%,62.5%和287 N/mm2。随着不锈钢变形量的再次增加,其力学性能只有些许变化。因为变形量增加到一定程度后,钢的晶粒级基本不再变化,位错密度也没有之前增加得那么迅速,此时的加工硬化主要以位错强化为主。从而使钢的性能趋于一个固定值,不再发生显著变化。
关 键 词: 金属材料;冷拔材;变形量;力学性能;位错强化;细晶强化
Title: Study on mechanical properties of 1Cr11Ni2W2MoV martensitic stainless steel cold-drawn bar
Author: LIU Junkai, SUN Xinyang, SHEN Mingming, SHI Yongxin, WANG Shouming, WANG Min
Organization: Key Laboratory of Corrosion Resistant Alloy Materials of Hebei Province, United Laboratory for Superalloy Regeneration Technology and New Deformation Materials, AVIC Shangda Superalloy Materials Co., Ltd
Abstract: The microstructure and mechanical properties of 1Cr11Ni2W2MoV martensitic stainless steel cold-drawn bar were analyzed by tensile test, hardness test and optical microscope. The experimental results show that under the dual action of dislocation strengthening and fine grain strengthening, the tensile strength, yield strength and hardness of 1Cr11Ni2W2MoV martensitic stainless steel bars gradually increase with cold-drawing deformation on the rise, and the grain size of the bars also becomes fine. After annealing and tempering, when the cumulative deformation of the cold drawn bar reaches 57.96%, the tensile strength (Rm), yield strength (Rp0.2), elongation after fracture (A), section shrinkage (Z) and Brinell hardness reach 1 087 MPa, 903 MPa, 16.5%, 62.5% and 287 N/mm2, respectively. With the increase of deformation of stainless steel, its mechanical properties only change slightly. Because after the amount of deformation increases to a certain extent, the grain size of steel basically does not change, the dislocation density of steel does not increase as rapidly as before, and work hardening of steel is mainly based on dislocation strengthening at the moment. So the properties of steel tend to a fixed value, and no longer change significantly.
Key words: metallic material; cold drawn bar; deflection; mechanical properties; dislocation strengthening; fine grain strengthening
发表期数: 2022年9月第3期
引用格式: 刘军凯,孙信阳,申明明,等. 1Cr11Ni2W2MoV马氏体不锈钢冷拉棒材的力学性能研究[J]. 中国科技论文在线精品论文,2022,15(3):399-404.
 
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