回火温度对4Cr5MoSiV1钢组织和性能的影响
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摘要
采用光学显微镜、体视显微镜和扫描电镜,并结合性能测试,研究了不同回火温度对4Cr5Mo Si V1钢组织和性能的影响。结果表明,随回火温度的提高,组织中马氏体含量减少,逐渐转变为回火索氏体,同时伴随着碳化物和铁素体相的聚集和长大,从而导致钢的强度与硬度降低,而塑性与韧性升高。4Cr5Mo Si V1钢在1080℃淬火,640℃回火,可获得最佳的强韧性配合及良好的抗热疲劳性能。
Effect of different tempering temperature on microstructure and mechanical properties of 4Cr5 Mo Si V1 steel was analyzed by optical microscopy,stereomicroscope, SEM and mechanical property testing,respectively. The results show that with increasing tempering temperature,martensite content decreases and martensite transforms gradually to tempered sorbite,accompanying with aggregation and growth of carbide and ferrite. These changes result in an decrease of hardness and strength,but increase of plastic and toughness. Optimal performance can be obtained after quenching at 1080 ℃ and tempering at 640 ℃.
Effect of different tempering temperature on microstructure and mechanical properties of 4Cr5 Mo Si V1 steel was analyzed by optical microscopy,stereomicroscope, SEM and mechanical property testing,respectively. The results show that with increasing tempering temperature,martensite content decreases and martensite transforms gradually to tempered sorbite,accompanying with aggregation and growth of carbide and ferrite. These changes result in an decrease of hardness and strength,but increase of plastic and toughness. Optimal performance can be obtained after quenching at 1080 ℃ and tempering at 640 ℃.
引文
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[3]金天文,赵成志,张贺新,等.新型铸态热作模具钢5Cr9Mo Ni2Si V的回火脆性[J].材料热处理学报,2015,36(8):167-173.Jin Tianwen,Zhao Chengzhi,Zhang Hexin,et al.Temper brittleness of new type as-cast ho-work die steel 5Cr9Mo Ni2Si V[J].Transactions of Materials and Heat Treatment,2015,36(8):167-173.
[4]刘以宽,李润宝,金来哲,等.H13钢热压模的试验和应用[J].金属热处理,1984,9(10):14-18.Liu Yikuan,Li Runbao,Jin Laizhe.Test and application of steel H13hot stamping dies[J].Heat Treatment of Metals,1984,9(10):14-18.
[5]黄春峰.国外新型热作模具钢及其热处理工艺[J].模具技术,2000(3):89-93.Huang Chunfeng.The external modern hot-mold steel and heat treat technology[J].Die and Mould Technology,2000(3):89-93.
[6]徐慧.H13钢高温淬回火后奥氏体晶粒度对强韧性的影响[J].热加工工艺,2015,44(12):226-229.Xu Hui.Effect of austenite grain size on strength and toughness of H13steel after high temperature quenching and temping[J].Hot Working Technology,2015,44(12):226-229.
[7]王雅静,刘宗昌,段宝玉.H13钢淬火-回火工艺及组织的研究[J].热处理,2013,28(4):26-31.Wang Yajing,Liu Zongchang,Duan Baoyu.Quenching and tempering processes and microstructure of H13 steel[J].Heat Treatment,2013,28(4):26-31.
[8]刘燕,王毛球,刘国权.回火温度对40Cr Ni3Mo V钢组织和力学性能的影响[J].金属热处理,2014,39(6):41-45.Liu Yan,Wang Maoqiu,Liu Guoquan.Effects of tempering temperature on microstructure and mechanical properties of 40Cr Ni3Mo V steel[J].Heat Treatment of Metals,2014,39(6):41-45.
[9]冯晓泉,王家瑛,何世禹.提高模具寿命指南[M].北京:机械工业出版社,1994:340.
[10]崔约贤,王长利.金属断口分析[M].哈尔滨:哈尔滨工业大学出版社,1998:41-42.
[11]王国珍,陈剑虹.碳化物粒子尺寸对裂纹断裂韧性的影响[J].甘肃工业大学学报,1996,22(4):1-7.Wang Guozhen,Chen Jianhong.Effects of carbide particle sizes on cracked fracture toughness[J].Journal of Gansu University of Technology,1996,22(4):1-7.