江阴兴澄特种钢铁有限公司,江阴 214400
张学诚(1986—),男,高级工程师; E-mail : zhangxuecheng@citicsteel.com
收稿:2024-07-31,
纸质出版:2025-05-30
移动端阅览
张学诚,姚海龙,李忠平.冷锻三销轴用钢SCR420H混晶原因探究及工艺优化[J].特殊钢,2025,46(03):133-137.
Zhang Xuecheng,Yao Hailong,Li Zhongping.Exploration and Process Optimization of Mixed Crystal Reasons in Steel SCR420H for Cold Forging Three-pins Shaft[J].Special Steel,2025,46(03):133-137.
张学诚,姚海龙,李忠平.冷锻三销轴用钢SCR420H混晶原因探究及工艺优化[J].特殊钢,2025,46(03):133-137. DOI: 10.20057/j.1003-8620.2024-00190.
Zhang Xuecheng,Yao Hailong,Li Zhongping.Exploration and Process Optimization of Mixed Crystal Reasons in Steel SCR420H for Cold Forging Three-pins Shaft[J].Special Steel,2025,46(03):133-137. DOI: 10.20057/j.1003-8620.2024-00190.
对三销轴零件进行线切割与腐蚀,显微组织观测结果表明,三销轴轴头冷变形率最大的区域存在严重的混晶现象。对此现象进行深入探究,分析该区域混晶的原因为三销轴冷挤压过程轴头两侧区域经历了极大的形变,高温渗碳过程细小的晶粒相互融合,最终形成粗大的晶粒。为消除三销轴零件轴头两侧区域的粗大晶粒,采用不同的正火与退火预处理工艺,使材料内的AlN化合物再次大量析出,并在晶界处形成偏聚,形成新的AlN析出相起到了强力钉扎晶界的作用。不同正火与退火预处理工艺,均可不同程度改善三销轴零件的奥氏体晶粒度,改善效果最佳的预处理方案为900 ℃以上预正火工艺。采用该方案可使原本混晶严重的三销轴零件的晶粒得到改善,三销轴零件晶粒达到7.0级以上。
The wire cutting and corrosion of the three-pins shaft part were carried out, and the microstructure observation results showed that there was severe mixed crystal phenomenon in the area with the highest cold deformation rate of the three-pins shaft head. Through in-depth exploration of this phenomenon, it was analyzed that the reason for mixed crystals in this area is due to the significant deformation experienced on both sides of the shaft head during the cold extrusion process of the three-pins shaft. During the high-temperature carburizing process, small grains fused with each other, ultimately forming coarse grains. In order to eliminate coarse grains on both sides of the shaft head of the three pin shaft component, different normalizing and annealing pretreatment processes were adopted to cause a large amount of AlN compounds in the material to precipitate again and form segregation at the grain boundaries, forming new AlN precipitates that play a strong role in pinning the grain boundaries. The normalizing and annealing pretreatment processes with different process parameters can improve the austenite grain size of the three-pins shaft parts to varying degrees. The best pretreatment scheme for improving the effect is the pre normalizing process above 900 ℃. The adoption of this scheme can improve the grain size of the three-pins shaft parts that were originally severely mixed, and the grain size of the three-pins shaft parts can reach 7.0 or above.
卢险峰 . 对冷锻特点认识的一种提升与更新 [J]. 金属加工(热加工) , 2018 ( 7 ): 81 - 83 .
陈学文 , 陈 军 , 赵 震 , 等 . 冷锻技术的发展现状与趋势 [J]. 金属成形工艺 , 2003 , 21 ( 5 ): 9 - 11+22 .
Hung Chang-Yu , Yu Bai , Nobuhiro Tsuji . Grain size altering yielding mechanisms in ultrafine grained high-Mn austenitic steel:Advanced TEM investigations [J].J. Mater Sci Technol . 2021 , 86 ( 27 ).192-203.
刘化民 , 黄良驹 , 张士宏 , 等 . 闭塞冷锻轿车差速器行星齿轮组织性能研究 [J]. 材料科学与工艺 , 2005 , 13 ( 3 ): 275 - 277 .
Smith J , Doe A . The influence of grain size on material properties [J].J. Mater. Sci . 2022 , 57 ( 3 ): 1234 - 1245 .
Liu Zi-yi , Bao Yan-ping , Wang Min , 等 . Austenite grain growth of medium-carbon alloy steel with aluminum additions during heating process [J]. Int. J. Minerals, Metallurgy Mater. 2019 ,( 3 ).282-290.
Johnson B , Brown C . New insights on grain size control [C]. Int. Conf. Mater. Sci. London , UK , 2023 . New York : Springer , 2023: 456 - 467 .
苏梁 , 弓硕 , 王福明 . 预热处理工艺对SCr420H齿轮钢高温渗碳奥氏体晶粒长大行为的影响 [J] 特殊钢 , 2023 ( 3 ): 74 - 83
杨少朋 , 尉文超 , 胡芳忠 等 . 低碳齿轮钢18CrNiMo7-6奥氏体晶粒度长大规律 [J] 金属学与热处理 , 2021 , 35 ( 8 ): 179 - 183 .
Hansen N . Hall–Petch relation and boundary strengthening [J]. Scripta Materialia , 2004 , 51 ( 8 ): 801 - 806 .
李明 . 冷轧深冲板退火过程中AlN析出行为对深冲性能影响研究 [D]. 北京 : 清华大学 , 2000 .
Williams M . A study on grain size and its effects [D]. Cambridge, UK : University of Cambridge , 2021 .
黄道龙 , 吴翔云 , 侯清宇 , 等 . 加热工艺对16MnCr5H钢奥氏体晶粒度的影响 [J]. 热处理 , 2022 , 37 ( 2 ): 46 - 49 .
Anderson P . Materials Science and Engineering [M]. New York : McGraw-Hill , 2020 : 234 - 237 .
Zhang L , Wang H . Effect of cold forging on microstructure and mechanical properties of aluminum alloy [J]. Journal of Materials Science and Technology , 2024 , 42 ( 3 ): 123 - 135 .
Wang Y . Study on cold forging process and properties of titanium alloy [D]. Harbin : Harbin Institute of Technology , 2022 .
0
浏览量
1
下载量
0
CSCD
0
CNKI被引量
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621