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双液铸造工艺优化及所制备的LAS/HCCI双金属的界面强度-韧性

Process Optimization of Dual-Liquid Casting and Interfacial Strength-Toughness of the Produced LAS/HCCI Bimetal.

作者信息

Xing Zhen-Guo, He Li-Xin, Liang Shun-Xing, Chang Lian-Bo, Xiao Zhi-Xia, Xing Wan-Li, Shen Hai-Bin, Cao Jing-Jing, Liu Hong-Ji

机构信息

College of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China.

Handan Huiqiao Compound Material Technology Co., Ltd., Handan 056038, China.

出版信息

Materials (Basel). 2023 Feb 28;16(5):2008. doi: 10.3390/ma16052008.

DOI:10.3390/ma16052008
PMID:36903133
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10004552/
Abstract

The pouring time interval is the decisive factor of dual-liquid casting for bimetallic productions. Traditionally, the pouring time interval is fully determined by the operator's experience and on-site observation. Thus, the quality of bimetallic castings is unstable. In this work, the pouring time interval of dual-liquid casting for producing low alloy steel/high chromium cast iron (LAS/HCCI) bimetallic hammerheads is optimized via theoretical simulation and experimental verification. The relevancies of interfacial width and bonding strength to pouring time interval are, respectively, established. The results of bonding stress and interfacial microstructure indicate that 40 s is the optimum pouring time interval. The effects of interfacial protective agent on interfacial strength-toughness are also investigated. The addition of the interfacial protective agent yields an increase of 41.5% in interfacial bonding strength and 15.6% in toughness. The optimum dual-liquid casting process is used to produce LAS/HCCI bimetallic hammerheads. Samples cut from these hammerheads show excellent strength-toughness (1188 Mpa for bonding strength and 17 J/cm for toughness). The findings could be a reference for dual-liquid casting technology. They are also helpful for understanding the formation theory of the bimetal interface.

摘要

浇注时间间隔是双液铸造生产双金属制品的决定性因素。传统上，浇注时间间隔完全由操作人员的经验和现场观察来确定。因此，双金属铸件的质量不稳定。在这项工作中，通过理论模拟和实验验证，对生产低合金钢/高铬铸铁（LAS/HCCI）双金属锤头的双液铸造的浇注时间间隔进行了优化。分别建立了界面宽度和结合强度与浇注时间间隔的相关性。结合应力和界面微观结构的结果表明，40秒是最佳浇注时间间隔。还研究了界面保护剂对界面强度-韧性的影响。添加界面保护剂后，界面结合强度提高了41.5%，韧性提高了15.6%。采用最佳双液铸造工艺生产LAS/HCCI双金属锤头。从这些锤头上切取的样品显示出优异的强度-韧性（结合强度为1188兆帕，韧性为17焦/平方厘米）。这些发现可为双液铸造技术提供参考。它们也有助于理解双金属界面的形成理论。

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本文引用的文献

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Indentation techniques for evaluating the fracture toughness of biomaterials and hard tissues.用于评估生物材料和硬组织断裂韧性的压痕技术。
J Mech Behav Biomed Mater. 2009 Aug;2(4):384-95. doi: 10.1016/j.jmbbm.2008.10.008. Epub 2008 Nov 12.