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首先对27CrMnB履带钢分别进行一次淬火+回火与二次淬火+回火热处理,随后采用扫描电镜、透射电镜和万能拉伸试验机等分析了试验钢在不同热处理工艺下的组织与性能演变规律。结果表明:在850～900℃一次淬火+200℃回火条件下,试验钢的强度和硬度随淬火温度升高呈上升趋势;当一次淬火温度超过900℃时,奥氏体晶粒开始长大,从而造成强度和韧性均随着淬火温度的升高而下降;随着回火温度由200℃升高至400℃,碳化物逐渐析出,强度和硬度降低,冲击韧性和断后伸长率先降低后升高,在250～300℃出现第一类回火脆性;在800～860℃二次淬火+200℃回火条件下,随二次淬火温度升高,试验钢的抗拉强度逐渐增加,冲击韧性呈先升高后降低的趋势;一次淬火和二次淬火工艺比较结果表明,二次淬火工艺可以显著细化原奥氏体晶粒尺寸,在基本不降低强度的前提下提高韧性,820～860℃二次淬火条件下冲击韧性提升幅度为9%～19%,其中,820℃二次淬火时强韧性匹配最好,抗拉强度为1685 MPa,冲击吸收能量为56 J。
Abstract：Firstly, the 27CrMnB track steel was subjected to primary quenching and tempering and secondary quenching and tempering heat treatments, respectively. Subsequently, microstructure and performance evolution of the experimental steel under different heat treatment processes were analyzed using scanning electron microscopy, transmission electron microscopy, and universal tensile testing machine. The results show that under the conditions of quenching at 850-900 ℃ and tempering at 200 ℃, the strength and hardness of the experimental steel increase with the increase of quenching temperature. When the primary quenching temperature exceeds 900 ℃, the austenite grains begin to grow, resulting in a decrease in strength and toughness with increasing quenching temperature. As the tempering temperature increases from 200 ℃ to 400 ℃, carbides gradually precipitate, the strength and hardness decrease, the impact toughness and elongation first decrease and then increase, and the first type of tempering brittleness appears at 250-300 ℃. Under the conditions of secondary quenching at 800-860 ℃ and tempering at 200 ℃, as the secondary quenching temperature increases, the tensile strength of the experimental steel gradually increases, and the impact toughness shows a trend of first increasing and then decreasing. The comparison between primary quenching and secondary quenching processes shows that the secondary quenching process can significantly refine the grain size of the prior austenite and improve toughness without significantly reducing strength. The increase in impact toughness under the conditions of 820-860 ℃ secondary quenching is 9%-19%. Among them, the strength and toughness matching is the best at 820 ℃secondary quenching, with a tensile strength of 1685 MPa and an impact absorbed energy of 56 J.
[1] Kim J I,Syn C K, Morris J W. Microstructural sources of toughness in QLT-treated 5. 5Ni cryogenic steel[J]. Metallurgical Transactions A,1983,14(1):93-103.
[2]牛振华,孙佳明,冯文荣,等.热处理对HSLA100钢组织性能的影响[J].材料热处理学报,2019,40(6):110-116.NIU Zhen-hua,SUN Jia-ming,FENG Wen-rong,et al. Effect of heat treatment on microstructure and properties of HSLA100 steel[J]. Transactions of Materials and Heat Treatment,2019,40(6):110-116.
[3] Khani Sanij M H,Ghasemi Banadkouki S S,Mashreghi A R,et al. The effect of single and double quenching and tempering heat treatments on the microstructure and mechanical properties of AISI 4140 steel[J]. Materials&Design,2012,42:339-346.
[4]郭天阳,罗小兵,项重辰,等.两相区淬火温度对Ni-Cr-Mo-V系高强船体钢组织及性能的影响[J].材料科学与工艺,2024,32(3):10-17.GUO Tian-yang,LUO Xiao-bing,XIANG Chong-chen,et al. Effect of intercritical quenching temperature on micro-structure and properties of Ni-Cr-Mo-V high strength hull steel[J]. Materials Science and Technology,2024,32(3):10-17.
[5]张绪平,任强,蔡钢.两次淬火对35CrMnSi钢抗拉强度的影响[J].热处理,2011,26(5):45-48.ZHANG Xu-ping,REN qiang,CAI Gang. Effect of double quenching on tensile strength of 35CrMnSi steel[J]. Heat Treatment,2011,26(5):45-48.
[6]聂其东.循环淬火和分级淬火对超高强度合金钢组织和性能的影响[D].哈尔滨:哈尔滨工程大学,2013.NIE Qi-dong. Influence of cycling quenching and step quenching on microstructure and mechanical properties of ultra-high strength alloy steel[D]. Harbin:Harbin Engineering University,2013.
[7]张国春,朱海宝,武会宾,等.强韧X80管件钢的组织和力学性能[J].材料热处理学报,2011,32(4):64-69.ZHANG Guo-chun,ZHU Hai-bao,WU Hui-bin,et al. Microstructure and properties of X80 pipe fitting steel[J]. Transactions of Materials and Heat Treatment,2011,32(4):64-69.
[8]胡敏,刘初升,王胜淇.热处理对27CrMnSi低合金耐磨钢组织和性能的影响[J].金属热处理,2023,48(12):87-91.HU Min,LIU Chu-sheng,WANG Sheng-qi. Effect of heat treatment on microstructure and properties of 27CrMnSi low alloy wearresistant steel[J]. Heat Treatment of Metals,2023,48(12):87-91.
[9]惠卫军,董瀚,王毛球,等.淬火温度对Cr-Mo-V系低合金高强度钢力学性能的影响[J].金属热处理,2002,27(3):14-16.HUI Wei-jun,DONG Han,WANG Mao-qiu,et al. Effect of quenching temperature on the mechanical properties of low-alloy highstrength steel of Cr-Mo-V series[J]. Heat Treatment of Metals,2002,27(3):14-16.
[10] Lee S J,Clarke K D. A quantitative investigation of cementite dissolution kinetics for continuous heating of hypereutectoid steel[J]. Metallurgical and Materials Transactions A,2015,46:3917-3923.
[11] Li Y H,Jiang Z H,Wang P,et al. Effect of a modified quenching on impact toughness of 52100 bearing steels[J]. Journal of Materials Science&Technology,2023,160:96-108.
[12] Wang J J,Kang Y L,Yu H,et al. Effect of quenching temperature on microstructure and mechanical properties of Q1030 steel[J].Materials Sciences and Applications,2019,10:665-675.
[13] Lan H F,Du L X,Li Q,et al. Improvement of strength-toughness combination in austempered low carbon bainitic steel:The key role of refining prior austenite grain size[J]. Journal of Alloys and Compounds,2017,710:702-710.
[14] TOshihiro H,Shiro T,Soutaro T,et al. Effect of austenite grain size on transformation behavior,microstructure and mechanical properties of 0. 1C-5Mn martensitic steel[J]. ISIJ International,2013,53(12):2218-2225.
[15] Bao Y K,Wu M,Liu K X,et al. Effect of tempering temperature on carbide precipitation and mechanical properties of marine atmospheric corrosion resistant steel[J]. Journal of Materials Engineering and Performance,2022,31:2517-2524.
[16] Horn R M,Ritchie R O. Mechanisms of tempered martensite embrittlement in low alloy steels[J]. Metallurgical Transactions A,1978,9:1039-1053.
[17] Watanabe K, Ida S, Yoshimi K. Influence of carbides precipitated by low-temperature tempering on the room-temperature mechanical properties of grade 91 steel[J]. ISIJ International,2022,62:2389-2396.
[18]夏博,王斌,张鹏,等.回火温度对高强弹簧钢微观组织和冲击性能的影响[J].材料研究学报,2023,37(5):341-352.XIA Bo,WANG Bin,ZHANG Peng,et al. Effect of tempering temperature on microstructure and impact properties of two highstrength leaf spring steels[J]. Chinese Journal of Materials Research,2023,37(5):341-352.
[19] Yang G,Wang C,Liu X,et al. Embrittlement mechanism due to slow cooling during quenching for M152 martensitic heat resistant steel[J]. Journal of Iron and Steel Research(International),2010,17(6):60-66.
[20]史术华,高擎,钱亚军.低温回火对低碳马氏体超高强钢组织及力学性能的影响[J].矿冶工程,2023,43(6):174-178.SHI Shu-hua,GAO Qing,QIAN Ya-jun. Effect of low-temperature tempering on microstructure and mechanical properties of lowcarbon martenstic ultra-high strength steel[J]. Mining and Metallurgical Engineering,2023,43(6):174-178.
[21] Tian C H,Ponge D,Christiansen L,et al. On the mechanical heterogeneity in dual phase steel grades:Activation of slip systems and deformation of martensite in DP800[J]. Acta Materialia,2020,183:274-284.
[22] Liu L,Maresca F,Vermeij T,et al. An integrated experimental-numerical study of martensite/ferrite interface damage initiation in dual-phase steels[J]. Scripta Materialia,2024,239:115798.
[23] Hasegawa K,Kawamura K,Urabe T,et al. Effects of microstructure on stretch-flange-formability of 980MPa grade cold-rolled ultra high strength steel sheets[J]. ISIJ International,2004,44(3):603-609.
[24] Liu L,Li L J,He J Z,et al. The unexpected low fracture toughness of dual-phase steels caused by ferrite/martensite interface decohesion[J]. Scripta Materialia,2024,244:116030.
[25] Saini N,Mulik R S,Mahapatra M M,et al. Prior-austenite grain refinement in P92 steel using double austenitization treatment[J].Materials Research Express,2019,6(2):025503.
基本信息:
DOI：10.13289/j.issn.1009-6264.2024-0473
中图分类号:TG142.1;TG156
引用信息:
[1]霍喜伟,宋玉卿,柴湘雨,等.热处理工艺对27CrMnB履带钢组织与性能的影响[J].材料热处理学报,2025,46(09):162-171.DOI:10.13289/j.issn.1009-6264.2024-0473.
2025-09-24
2025-09-24