ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2015, Vol. 36 ›› Issue (6): 56-58.

• 组织和性能 • 上一篇    下一篇

锻造工艺对航空轴承钢G13Cr4Ni4Mo4VA棒材冲击性能的影响

王瑞1,2,张洋鹏1,战东平1,姜周华1,薛向欣1,杨亮2,瞿晓刚2,周伟基2,张慧书3   

  1. 1东北大学材料与冶金学院,沈阳110004;
    2抚顺特殊钢股份有限公司技术中心,抚顺113001;
    3辽宁科技学院冶金学院,本溪117004
  • 收稿日期:2015-06-19 出版日期:2015-12-01 发布日期:2022-08-16
  • 作者简介:王 瑞(1968-),女,博士研究生(东北大学),教授级高级工程师,1990年东北工学院(本科)毕业,超高强度钢研究。
  • 基金资助:
    国家863项目资助(2012AA03A503)

Effect of Forging Process on Impact Toughness of Bearing Steel Bar G13Cr4Ni4Mo4VA for Aviation

Wang Rui1,2, Zhang Yangpeng1, Zhan Dongping1, Jiang Zhouhua1, Xue Xiangxin1, Yang Liang2, Qu Xiaogang2 , Zhou Weiji2 , Zhang Huishu3   

  1. 1 School of Materials and Metallurgy, Northeastern University, Shenyang 110004;
    2 Technical Center, Fushun Special Steel Co Ltd, Fushun 113001 ;
    3 School of Metallurgy, Liaoning Institute of Science and Technology, Benxi 117004
  • Received:2015-06-19 Published:2015-12-01 Online:2022-08-16

摘要: G13Cr4Ni4Mo4VA轴承钢(/%:0.13C,4.13Cr,3.52Ni,4.39Mo,1.19V)由6 t真空感应炉+1.3 t(Φ406 mm)真空自耗炉熔炼,并经锻造(1160℃加热,≥1140℃开锻,≥900℃终锻)生产成Φ120 mm棒材。力学性能试样经1 100℃80 min淬火(N2气冷),-73℃2 h冷处理,3次回火:550℃2 h空冷处理。其冲击值aku为27.1~39.5 J/cm2,低于标准87.5 J/cm2要求。经试验得出,由于锻造温度过高,造成δ铁素体在晶界的析出,使棒材冲击性能降低。通过锻造工艺优化,将钢锭加热温度由原1160℃降至1 110℃,避免δ铁素体的析出,棒材的平均aku冲击值提高至113.6 J/cm2

关键词: 材航空轴承钢G13Cr4Ni4Mo4VA, 锻造工艺, δ铁素体, 冲击性能

Abstract: The bearing steel G13Cr4Ni4Mo4VA (/% : 0. 13C, 4.13Cr, 3. 52Ni, 4.39Mo, 1. 19V) is melted by 6 t vacuum induction furnace +1. 3 t (Φ406 mm) vacuum arc remelting furnace, and forged to Φ120 mm bar with heating at 1 160 °C , beginning forging at ≥1 140 ℃ and end forging at ≥900 ℃. The specimen for mechanical properties examination is quenched at 1 100 ℃ for 80 min (N2 gas cooling) , cold treated at -73℃ for 2 h and 3 times tempering treated at 550 ℃ for 2 h, air cooling. The impact value aku is 27. 1 ~ 39. 5 J/cm2, lower than that of requirement of standard i. e. 87. 5 J/cm2. It is obtained by test that due to higher forging temperature, led to δ ferrite precipitating at grain boundaries, the impact value of bar decreases. With optimizing forging process, decreasing ingot heating temperature to 1 110 ℃ from original 1 160 ℃, to avoid the δ ferrite precipitation, the average impact value aku of bar increases to 113. 6 J/cm2.