Transactions of Materials and Heat Treatment

Title：Influence of quenching temperature on microstructure and hardness for modified Cr8Mo2VSi die steel

Authors：

Unit：

KeyWords：

ClassificationCode：TG142.14

year,vol(issue):pagenumber：2021,46(10):196-202

Abstract：

For modified Cr8Mo2VSi cold work die steel containing W, the influences of different quenching temperatures on the microstructure, residual austenite content and hardness were studied and analyzed by metallograph, SEM, EDS, XRD and hardness tests. The results show that the microstructure of samples after heat treatment is mainly tempered martensite, a small amount of residual austenite and eutectic carbide. The primary carbide contains more W, while Cr, Mo, V, C and other elements are enriched in large eutectic carbide, but are poor in martensite matrix. According to the composition ratio, the eutectic carbide types are Cr7C3 type carbide and a small amount of VC type, Fe21Mo2C6 type or Fe21W2C6 type carbide, and the higher quenching temperature is more beneficial to the precipitation of M23C6 type carbide. In addition, the microstructure of Cr8Mo2VSi die steel at higher quenching temperature contains more residual austenite, and the hardness after the final tempering is also higher.

Funds：

重要工业原材料（模具钢材产品）质量国际比对研究；模具钢（S136）在典型热处理前后特征指标定量分析及变化规律研究；国家教师科研基金十二五规划（CTF120702）

作者简介：孙康彬（1997-），男，硕士研究生 E-mail：599464428@qq.com 通信作者：黄历锋（1980-），男，博士，副教授 E-mail：hlf@gddqt.com

Reference：

[1]李诚,揭晓华,张艳梅,等.DC53冷作模具钢基于短时渗硼的强韧化[J].材料热处理学报,2014,35(9):188-194.

Li C, Jie X H, Zhang Y M, et al. Strengthening and toughening of DC53 cold work die steel based on short-time boronization [J]. Journal of Material Heat Treatment, 2014, 35(9):188-194.

[2]邓莉萍,鲁世强,汤斌兵.Nb-Cr-Mo合金蠕变行为研究[J].稀有金属,2019,43(6):598-603.

Deng L P, Lu S Q, Tang B B. High temperature creep behavior of Nb-Cr-Mo alloy [J]. Chinese Journal of Rare Metals, 2019, 43(6):598-603.

[3]曹奇,吴晓春,李爽,等.两种新型Mo-W热作模具钢的回火性能比较[J].金属热处理,2016,41(5):12-18.

Cao Q, Wu X C, Li S, et al. Comparison of tempering properties of two new Mo-W hot die steels [J]. Metal Heat Treatment, 2016, 41(5):12-18.

[4]韦韡,周江奇,李恒佰,等.汽车高强板用Cr8类冲压模具钢性能研究[J].汽车工程,2020,42(6):826-831.

Wei W, Zhou J Q, Li H B, et al. Study on the performance of Cr8 type stamping die steels for automotive high strength plates [J]. Automotive Engineering, 2020, 42(6):826-831.

[5]金欣,周健,迟宏宵,等.钨对热锻模具钢一次碳化物形貌及冲击性能的影响[J].金属热处理,2018,43(3):35-39.

Jin X, Zhou J, Chi H X, et al. Effect of tungsten on the primary carbide morphology and impact properties of hot forged die steel [J]. Metal Heat Treatment, 2018, 43(3):35-39.

[6]罗爱辉,朱灯宏,吴晓春,等.碳含量对Cr-Mo-V系模具钢热稳定性能的影响[J].模具工业,2019,45(5):58-62.

Luo A H, Zhu D H, Wu X C, et al. Effect of carbon content on thermal stability of Cr-Mo-V mold steel [J]. Die & Die Industry, 2019, 45(5):58-62.

[7]李爽,吴晓春,黎欣欣,等.钼钨系高导热率热作模具钢高温性能[J].材料研究学报,2017,31(1):32-40.

Li S, Wu X C, Li X X, et al. High-temperature performance of molybdenum and tungsten hot die steel with high thermal conductivity [J]. Journal of Materials Research, 2017, 31(1):32-40.

[8]YB/T 5338—2006, 钢中残余奥氏体定量测定X射线衍射仪法[S].

YB/T 5338—2006, Quantitative determination of residual austenite in steel by X-ray diffraction method [S].

[9]李琪,罗家明,刘晓岚,等.Rietveld方法在钢中残余奥氏体定量测定中的应用[J].物理测试,2008，(4):49-51.

Li Q, Luo J M, Liu X L, et al. Application of Rietveld method in the quantitative determination of residual austenite in steel [J]. Physical Test, 2008, (4):49-51.

[10]刘宗昌,计云萍.马氏体相变研究的最新进展(十二)[J].热处理技术与装备,2016,37(1):1-4.

Liu Z C, Ji Y P. Recent progress in the study of martensite transformation (12) [J]. Heat Treatment Technology and Equipment, 2016, 37(1):1-4.

[11] 金欣.钨对新型热锻模具钢组织和力学性能影响[D].北京：钢铁研究总院,2017.

Jin X. Effect of Tungsten on Microstructure and Mechanical Properties of New Hot Forged Die Steel [D]. Beijing: China Iron & Steel Research Institute, 2017.

[12] 迟宏宵. Cr8型冷作模具钢高性能化研究[D]. 昆明：昆明理工大学,2011.

Chi H X. Research on High Performance of Cr8 Cold Work Die Steel [D]. Kunming: Kunming University of Science and Technology,2011.

[13]迟宏宵,马党参,占礼春,等.热处理对高速钢W6Mo5Cr4V3Co8组织和性能的影响[J].材料热处理学报,2012,33(12):105-109.

Chi H X, Ma D S, Zhan L C, et al. Effect of heat treatment on microstructure and properties of high speed steel W6Mo5Cr4V3Co8 [J]. Journal of Material Heat Treatment, 2012, 33(12):105-109.

[14] 张俊喜,郭小汝,李晶.热处理对Vanadis 4 Extra模具钢组织与性能的影响[J].化工机械,2019,46(4):386-389，404.

Zhang J X, Guo X R, Li J. Effect of heat treatment on the structure and properties of Vanadis 4 Extra die steel [J]. Chemical Machinery, 2019, 46(4):386-389，404.

[15] 元莎,白玉冰,周乐育,等.热处理工艺参数对Cr8冷作模具钢组织和性能的影响[J].锻压技术,2020,45(1):168-172，178.

Yuan S, Bai Y B, Zhou L Y, et al. Effect of heat treatment parameters on microstructure and properties of Cr8 cold die steel [J]. Forging & Stamping Technology, 2020, 45(1):168-172，178.

Service：

【This site has not yet opened Download Service】【Add Favorite】