付佳乐,倪豪豪,郭顺,翟绍康,刘海霞,刘光磊,沈宝国,程晓农

• 1:江苏大学材料科学与工程学院
• 2:江苏航空职业技术学院

摘要(Abstract)：

为了解决现有国产圆盘耙片因强度和韧性不足而导致的服役寿命偏低的问题，对27MnCrB5钢进行了淬火-回火(Q-T)的热处理，并分析了在该工艺下回火温度对27MnCrB5钢微观组织与力学性能的影响。结果表明：27MnCrB5钢在淬火-回火后的组织为板条状马氏体+碳化物。在不同回火温度下的力学性能测试表明，27MnCrB5钢在440℃回火后具有较高的强韧性匹配以及良好的综合力学性能，其屈服强度为1064 MPa,断后伸长率为9.4%,室温冲击韧性值为80.6 J·cm~(-2),硬度为38.9 HRC,这主要归因于在该回火温度下析出的碳化物呈球状并均匀分布于马氏体基体上，这种碳化物的弥散强化作用进一步提升了Q-T态27MnCrB5钢的强韧性。

关键词(KeyWords)： 圆盘耙片;硼钢;回火温度;冲击韧性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52175410)

作者(Author): 付佳乐,倪豪豪,郭顺,翟绍康,刘海霞,刘光磊,沈宝国,程晓农

DOI: 10.13289/j.issn.1009-6264.2024-0142

参考文献(References)：

• [1] 刘宸.旋耕刀冲击磨损试验装置设计与试验[D].保定：河北农业大学，2022.LIU Chen.Design and experiment of rotary tiller impact wear test device[D].Baoding:Hebei Agricultural University,2022.
• [2] 张元常，张大斌，曹阳，等.基于DEM与MFBD双向耦合的农机触土部件疲劳分析[J].机电工程，2020,37(4):351-358.ZHANG Yuan-chang,ZHANG Da-bin,CAO Yang,et al.Fatigue analysis of the soil-engaging components of agricultural machinery based on bidirectional coupling of DEM and MFBD[J].Mechanical & Electrical Engineering Magazine,2020,37(4):351-358.
• [3] 陈登华，于洪海，刘海定，等.田间触土部件用60Si2Mn钢激光熔敷硬质相增强耐磨层的组织性能[J].金属热处理，2023,48(12):213-221.CHEN Deng-hua,YU Hong-hai,LIU Hai-ding,et al.Microstructure and properties of hard-phase reinforced wear-resistant layer on 60Si2Mn steel for soil-engaging component deposited by laser cladding[J].Heat Treatment of Metals,2023,48(12):213-221.
• [4] 邢泽炳，卫英慧.65Mn钢离子渗碳化钨的耐磨性能[J].材料热处理学报，2013,34(S2):201-204.XING Ze-bing,WEI Ying-hui.Wear-resisting property of 65Mn steel with ion implanting tungsten carbide[J].Transactions of Materials and Heat Treatment,2013,34(S2):201-204.
• [5] Wang Y,Li D,Nie C,et al.Research progress on the wear resistance of key components in agricultural machinery[J].Materials,2023,16(24):7646.
• [6] Wang Y,Sun J,Jiang T,et al.Super strength of 65Mn spring steel obtained by appropriate quenching and tempering in an ultrafine grain condition[J].Materials Science and Engineering A,2019,754:1-8.
• [7] He B B,Huang B M,He S H,et al.Increasing yield strength of medium Mn steel by engineering multiple strengthening defects[J].Materials Science and Engineering A,2018,724:11-16.
• [8] Bai M K,Pang J C,Wang G D,et al.Martensitic transformation cracking in high carbon steels for bearings[J].Materials Science and Technology,2016,32(11):1179-1183.
• [9] ?oli S,Podgornik B,Leskov?ek V.The occurrence of quenching cracks in high-carbon tool steel depending on the austenitizing temperature[J].Engineering Failure Analysis,2018,92:140-148.
• [10] 崔忠圻，覃耀春.金属学与热处理[M].北京：机械工业出版社，2007.
• [11] Zheng Y,Wang F,Li C,et al.Dissolution and precipitation behaviors of boron bearing phase and their effects on hardenability and toughness of 25CrMoNbB steel[J].Materials Science and Engineering A,2017,701:45-55.
• [12] Cho K C,Mun D J,Kim J Y,et al.Effect of boron precipitation behavior on the hot ductility of boron containing steel[J].Metallurgical and Materials Transactions A,2010,41:1421-1428.
• [13] Lin H R,Cheng G H.Analysis of hardenability effect of boron[J].Materials Science and Technology,1990,6(8):724-730.
• [14] Ahmed M,Salam I,Hashmi F H,et al.Influence of banded structure on the mechanical properties of a high-strength maraging steel[J].Journal of Materials Engineering and Performance,1997,6:165-171.
• [15] Donald A M,Viney C,Windle A H.Banded structures in oriented thermotropic polymers[J].Polymer,1983,24(2):155-159.
• [16] Feng R,Li S,Zhu X,et al.Microstructural characterization and formation mechanism of abnormal segregation band of hot rolled ferrite/pearlite steel[J].Journal of Alloys and Compounds,2015,646:787-793.
• [17] Maitrepierre P,Thivellier D,Tricot R.Influence of boron on the decomposition of austenite in low carbon alloyed steels[J].Metallurgical Transactions A,1975,6:287-301.
• [18] Gao Y,Xue X,Yang H.Influence of Boron on initial austenite grain size and hot deformation behavior of Boron microalloyed steels[J].Crystals,2015,5(4):592-607.
• [19] Tian Z,Wang Y,Zhang Z,et al.The effects of holding time on grain size,orientation degree and properties of h-BN matrix textured ceramics[J].Materials Chemistry and Physics,2020,248:122916.
• [20] Horn R M,Ritchie R O.Mechanisms of tempered martensite embrittlement in low alloy steels[J].Metallurgical Transactions A,1978,9:1039-1053.
• [21] Terasaki F,Ohtani H.Study on brittle fracture surfaces formed at low-temperature in relation to microstructures of low carbon steels[J].Transactions of the Iron and Steel Institute of Japan,1972,12(1):45-53.
• [22] Furlan A,Jansson U,Lu J,et al.Structure and bonding in amorphous iron carbide thin films[J].Journal of Physics:Condensed Matter,2015,27(4):045002.
• [23] 刘震寰，李勇翰，刘洋，等.GCr15轴承钢时效过程碳化物的演化行为[J].材料研究学报，2024,38(2):130-140.LIU Zhen-yuan,LI Yong-han,LIU Yang,et al.Carbide evolution behavior of GCr15 bearing steel during aging process[J].Chinese Journal of Materials Research,2024,38(2):130-140.
• [24] Mohsenzadeh M S,Mazinani M.On the yield point phenomenon in low-carbon steels with ferrite-cementite microstructure[J].Materials Science and Engineering A,2016,673:193-203.
• [25] Kim J G,Um H Y,Kang J Y,et al.Quantitative study on yield point phenomenon of low carbon steels processed by compact endless casting and rolling[J].Materials Science and Engineering A,2018,734:408-415.

文章评论(Comment)：