| 100 | 0 | 34 |
| 下载次数 | 被引频次 | 阅读次数 |
在25CrNiMo钢成分的基础上，采用以SiMn替代CrNi的成分优化，设计了1 300 MPa级低合金20SiMnMo钢。通过经验公式计算结合热膨胀试验、扫描电子显微镜、电子背散射衍射、硬度测试、拉伸试验和冲击试验等，对两种钢的相变特性、微观组织与力学性能进行对比研究。结果表明：20SiMnMo钢的贝氏体和马氏体临界冷速与25CrNiMo钢的相近，分别为1和5℃/s。300℃回火后20SiMnMo钢的屈服强度和抗拉强度分别为1 316和1 546 MPa,室温及-40℃冲击吸收能量分别为70和25 J,达到了与25CrNiMo钢相近的强韧性匹配。
Abstract：On the basis of the composition of 25CrNiMo steel, a 1 300 MPa grade low-alloy 20SiMnMo steel was designed by composition optimization, that is, by substitution of SiMn for CrNi. A comparative study was performed on the phase transformation characteristics, microstructure and mechanical properties of two types of steels through empirical formula calculation in conjunction with thermal expansion test, scanning electron microscope, electron back scatter diffraction, hardness test, tensile test, and impact test. The results showed that 20SiMnMo and 25CrNiMo steels were similar in critical rates to achieve bainite and martensite, being 1 ℃/s for bainite and 5 ℃/s for martensite, respectively; the yield strength and tensile strength of 20SiMnMo steel tempered at 300 ℃ were 1 316 and 1 546 MPa, respectively, and the impact absorption energies at room temperature and-40 ℃ were 70 and 25 J, respectively, achieving a similar combination of strength and toughness to that of 25CrNiMo.
[1] BRANCO R,BERTO F.Mechanical behavior of high- strength low- alloy steels[J].Metals,2018,8:610- 611.
[2] 陈付红，丁伟，黄维，等.国外先进公司工程机械用高强钢发展现状[J].上海金属，2015,37(1):47- 51.
[3] 温长飞，邓想涛，王昭东，等.1 300 MPa级超高强钢临界粗晶热影响区组织和韧性[J].钢铁研究学报，2018,30(8):650- 656.
[4] GAO P F,LIANG J H,CHEN W J,et al.Prediction and evaluation of optimum quenching temperature and microstructure in a 1 300 MPa ultra- high- strength Q & P steel [J].Journal of Iron and Steel Research International,2022,29(2):307- 315.
[5] AN T B,WEI J S,ZHAO L,et al.Influence of carbon content on microstructure and mechanical properties of 1 000 MPa deposited metal by gas metal arc welding[J].Journal of Iron and Steel Research International,2019,26(5):512- 518.
[6] LIN Z D,SONG K J,SUN Z,et al.Mechanical performance of 22SiMn2TiB steel welded with low- transformation- temperature filler wire and stainless steel filler wire[J].Journal of Iron and Steel Research International,2023,31(2):967- 981.
[7] ZHAO Y J,REN X P,YANG W C,et al.Design of a low- alloy high-strength and high-toughness martensitic steel[J].International Journal of Minerals,Metallurgy,and Materials,2013,20(8):733- 740.
[8] WANG L J,CAI Q W,WU H B,et al.Effects of Si on the stability of retained austenite and temper embrittlement of ultrahigh strength steels[J].International Journal of Minerals,Metallurgy,and Materials,2011,18(5):543- 50.
[9] 李辉平.热处理工艺数值模拟技术[M].北京：化学工业出版社，2017.
[10] GRANGE R A,HRIBAL C R,PORTER L F.Hardness of tempered martensite in carbon and low-alloy steels[J].Metallurgical Transactions A,1977,8(11):1775- 1785.
[11] 周强，曹燕光，杨庚蔚，等.回火温度对700 MPa级大梁钢组织和性能的影响[J].钢铁，2023,58(10):102- 110.
[12] CHEN S H,RONG L J.Effect of silicon on the microstructure and mechanical properties of reduced activation ferritic/martensitic steel[J].Journal of Nuclear Materials,2015,459(10):13- 19.
[13] 刘铭杰，周为群，董瀚，等.回火温度对含钒42CrMo钢-40 ℃冲击韧性的影响[J].上海金属，2023,45(4):62- 70.
[14] RAMACHANDRAN D C,MOON J,LEE C H,et al.Role of bainitic microstructures with MA constituent on the toughness of an HSLA steel for seismic resistant structural applications[J].Materials Science and Engineering A,2021,801(13):140390.
[15] 董欣欣，杨丽，唐勤，等.热轧含钛低合金高强钢板断口分层机理研究[J].有色金属科学与工程，2024,15(1):51- 57.
[16] DOLZHENKO A,BELYAKOV A,KAIBYSHEV R.Effect of tempforming temperature on the impact toughness of an HSLA steel[J].ISIJ International,2023,63(2):382- 389.
基本信息:
DOI：10.19947/j.issn.1001-7208.2024.04.19
中图分类号:TG142.33
引用信息:
[1]张啸哲,葛琛,赵洪山等.1300MPa级低合金20SiMnMo钢的相变特性与力学性能[J].上海金属,2025,47(04):26-32.DOI:10.19947/j.issn.1001-7208.2024.04.19.
基金信息:
广西科技重大专项(AA21077010)