胡继康,殷立涛,周玉成,邓想涛,徐流杰

• 1:河南科技大学材料科学与工程学院
• 2:洛阳中重铸锻有限责任公司
• 3:东北大学轧制技术及连轧自动化国家重点实验室

摘要(Abstract)：

利用真空冶炼技术制备了18Ni(200)马氏体时效钢锭,锻造成钢坯后首先进行1000℃的一次固溶处理,随后进行了不同温度(800、850和900℃)的二次固溶处理及500℃时效处理,研究了二次固溶处理温度对实验钢显微组织和力学性能的影响。结果表明:二次固溶温度对实验钢的马氏体板条块尺寸和力学性能具有显著影响;当二次固溶温度为800℃时,实验钢的马氏体板条块尺寸最小,约为7.72μm,其在室温和-196℃下的屈服强度分别为1518和1932 MPa,冲击吸收能量分别为36.8和8.7 J,强度和韧性表现最佳;提高二次固溶温度,板条块尺寸显著增大,屈服强度和冲击吸收能量降低;二次固溶温度升高至900℃,马氏体板条块尺寸增大到约10.27μm,增加了33.0%,室温和-196℃下的屈服强度分别下降到1491和1882 MPa,冲击吸收能量分别下降到29.5和5.5 J;板条块尺寸细化能有效阻碍位错运动,减缓局部应力集中,提高实验钢的屈服强度和韧性;位错在-196℃下无法获得所需的热激活,导致不同二次固溶温度下实验钢在-196℃时的冲击吸收能量较室温冲击吸收能量下降76.4%～81.6%。

关键词(KeyWords)： 马氏体时效钢;二次固溶处理;马氏体板条块;力学性能

Abstract:

Keywords:

基金项目(Foundation): 河南省重点研发专项(231111230400)

作者(Author): 胡继康,殷立涛,周玉成,邓想涛,徐流杰

DOI: 10.13289/j.issn.1009-6264.2024-0513

参考文献(References)：

• [1] Anoop C,Prakash A,Murty S N,et al. Origin of low temperature toughness in a 12Cr-10Ni martensitic precipitation hardenable stainless steel[J]. Materials Science and Engineering A,2018,709:1-8.
• [2] Chenna K S,Srinath J,Jha,A K,et al. Effect of heat treatment on microstructure and mechanical properties of 12Cr-10Ni-0. 25 Ti-0. 7 Mo stainless steel[J]. Metallography,Microstructure,and Analysis,2013,2:234-241.
• [3] Makhneva T, Savchenkova S, Makhnev E, et al. Effect of preliminary heat treatment on the stability of austenite in steel08KH15N5D2T[J]. Metal Science and Heat Treatment,2005,47:232-234.
• [4]朱景川,尹钟大,罗鸿,等. 18Ni(200)马氏体时效钢的循环相变晶粒细化新工艺[J].钢铁,2001,36(6):52-55.ZHU Jing-chuan,YIN Zhong-da,LUO Hong,et al. a new cyclic phase transformation technology for grain refinement of 18Ni(200)maraging steel[J]. Iron&Steel,2001,36(6):52-55.
• [5]吉昱睿,杨卓越,谭红琳,等.提高Cr-Ni-Co-Mo马氏体时效不锈钢超低温韧性的热处理工艺[J].金属热处理,2021,46(10):133-136.JI Yu-rui, YANG Zhuo-yue, TAN Hong-lin, et al. Heat treatment process for improving cryogenic toughness of Cr-Ni-Co-Mo maraging stainless steel[J]. Heat Treatment of Metals,2021,46(10):133-136.
• [6]苏文文,杨卓越,丁雅丽.重复固溶处理对超低温用铸造马氏体时效不锈钢性能的影响[J].金属热处理,2014,39(4):15-18.SU Wen-wen,YANG Zhuo-yue,DING Ya-li. Effect of repeat solution treatment on properties of cast maraging stainless steel for cryogenic applications[J]. Heat Treatment of Metals,2014,39(4):15-18.
• [7] Schnbauer B M,Yanase K,Endo M. The influence of various types of small defects on the threshold behaviour of precipitationhardened 17-4PH stainless steel[J]. Theoretical and Applied Fracture Mechanics,2016,87(2):35-49.
• [8]谢东,杨西荣,赵西成,等.循环相变对T250马氏体时效钢组织和性能的影响[J].热加工工艺,2015,44(12):190-194.XIE Dong,YANG Xi-rong,ZHAO Xi-cheng,et al. Influence of cyclic phase transformation on microstructure and properties of T250maraging steel[J]. Hot Working Technology,2015,44(12):190-194.
• [9]罗文英,蒋静,刘宪民,等. 18Ni马氏体时效钢循环相变细晶工艺研究[J].热加工工艺,2012,41(16):194-196.IUO Wen-ying,JIANG Jing,LIU Xian-min,et al. Study on grain refinement of 18Ni maraging steel by cyclic transformation[J]. Hot Working Technology,2012,41(16):194-196.
• [10] Tomita Y, Okabayashi K. Effect of microstructure on strength and toughness of heat-treated low alloy structural steels[J].Metallurgical Transactions A,1986,17:1203-1209.
• [11] Morito S,Yoshida H,Maki T,et al. Effect of block size on the strength of lath martensite in low carbon steels[J]. Materials Science and Engineering A,2006,438:237-240.
• [12] Wang D,Yang S,Jiang H,et al. Study on the relationship between the refined hierarchical microstructure,yield strength and impact toughness of low-carbon martensitic steel at different quenching temperatures[J]. Materials Science and Engineering A,2024,896:146271.
• [13] Sun L,Simm T H,Martin T L,et al. A novel ultra-high strength maraging steel with balanced ductility and creep resistance achieved by nanoscale β-NiAl and Laves phase precipitates[J]. Acta Materialia,2018,149:285-301.
• [14] Long S,Liang Y,Jiang Y,et al. Effect of quenching temperature on martensite multi-level microstructures and properties of strength and toughness in 20CrNi2Mo steel[J]. Materials Science and Engineering A,2016,676:38-47.
• [15] Gao B,Wang L,Liu Y,et al. Achieving ultrahigh strength by tuning the hierarchical structure of low-carbon martensitic steel[J].Materials Science and Engineering A,2023,881:145370.
• [16] Liang Y,Long S,Xu P,et al. The important role of martensite laths to fracture toughness for the ductile fracture controlled by the strain in EA4T axle steel[J]. Materials Science and Engineering A,2017,695:154-164.
• [17] Karthikeyan T,Dash M K,Saroja S,et al. Estimation of martensite feature size in a low-carbon alloy steel by microtexture analysis of boundaries[J]. Micron,2015,68:77-90.
• [18] Cho H,Bronkhorst C A,Mourad H M,et al. Anomalous plasticity of body-centered-cubic crystals with non-Schmid effect[J].International Journal of Solids and Structures,2018,139:138-149.
• [19] Mrovec M,Gr?ger R,Bailey A G,et al. Bond-order potential for simulations of extended defects in tungsten[J]. Physical Review B—Condensed Matter and Materials Physics,2007,75(10):104119.
• [20] Vitek V. Core structure of screw dislocations in body-centred cubic metals:relation to symmetry and interatomic bonding[J].Philosophical Magazine,2004,84(3/5):415-428.
• [21] Weinberger C R,Boyce B L,Battaile C C. Slip planes in bcc transition metals[J]. International Materials Reviews,2013,58(5):296-314.
• [22] Monnet G,Terentyev D. Structure and mobility of the 12<111>{112}edge dislocation in BCC iron studied by molecular dynamics[J]. Acta Materialia,2009,57(5):1416-1426.
• [23] Schoeck G. The Peierls model:Progress and limitations[J]. Materials Science and Engineering A,2005,400:7-17.
• [24] Marian J,Cai W,Bulatov V V. Dynamic transitions from smooth to rough to twinning in dislocation motion[J]. Nature Materials,2004,3(3):158-163.
• [25] Butler B G,Paramore J D,Ligda J P,et al. Mechanisms of deformation and ductility in tungsten:A review[J]. International Journal of Refractory Metals and Hard Materials,2018,75:248-261.
• [26] Schneider A S,Kaufmann D,Clark B G,et al. Correlation between critical temperature and strength of small-scale bcc pillars[J].Physical Review Letters,2009,103(10):105501.

文章评论(Comment)：