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CLC number: TG31

On-line Access: 2020-11-11

Received: 2020-01-09

Revision Accepted: 2020-05-02

Crosschecked: 2020-10-28

Cited: 0

Clicked: 1741

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Yong-gen Sun

https://orcid.org/0000-0002-5147-3428

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Journal of Zhejiang University SCIENCE A 2020 Vol.21 No.11 P.908-922

http://doi.org/10.1631/jzus.A2000012


Fabrication and performance analyses of 45# steel supports using liquid forging


Author(s):  Yong-gen Sun, Yu-shi Qi, Jiao Li, Zhi-ming Du, Li-li Chen, Li-hua Chen

Affiliation(s):  National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China; more

Corresponding email(s):   hitsunyg@163.com, duzm@263.net

Key Words:  45# steel, Liquid forging, Numerical simulation, Mechanical properties, Wear resistance, Fracture behavior


Yong-gen Sun, Yu-shi Qi, Jiao Li, Zhi-ming Du, Li-li Chen, Li-hua Chen. Fabrication and performance analyses of 45# steel supports using liquid forging[J]. Journal of Zhejiang University Science A, 2020, 21(11): 908-922.

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author="Yong-gen Sun, Yu-shi Qi, Jiao Li, Zhi-ming Du, Li-li Chen, Li-hua Chen",
journal="Journal of Zhejiang University Science A",
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pages="908-922",
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doi="10.1631/jzus.A2000012"
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%T Fabrication and performance analyses of 45# steel supports using liquid forging
%A Yong-gen Sun
%A Yu-shi Qi
%A Jiao Li
%A Zhi-ming Du
%A Li-li Chen
%A Li-hua Chen
%J Journal of Zhejiang University SCIENCE A
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T1 - Fabrication and performance analyses of 45# steel supports using liquid forging
A1 - Yong-gen Sun
A1 - Yu-shi Qi
A1 - Jiao Li
A1 - Zhi-ming Du
A1 - Li-li Chen
A1 - Li-hua Chen
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2000012


Abstract: 
In this paper, 45# steel supports prepared by liquid forging showed excellent performances and the effects of processing techniques on the development of microstructures and mechanical properties of these steel supports were researched. The liquid forging process was simulated and technological parameters were optimized via a ProCAST simulation software. The solidification time, temperature distribution, first principal stress distribution of the 45# steel supports varied with time, temperatures, and position. Two principal parameters, pouring temperature and dwell time, were assessed for their effects on microstructures, mechanical properties, and wear resistance properties of 45# steel supports. Results showed that the optimal pouring temperature of the molten metal and the pressure-holding time were between 1540 °C and 1560 °C and between 35 s and 40 s, respectively. The microstructure, mechanical properties, and fracture behavior of different positions in the support were also discussed, and the central position performed better than the edge because of plastic deformation. Finally, the dynamic solidification process was also investigated and the liquid forging process of 45# steel supports was complex and contained some special metal liquid convection and several plastic deformation stages.

45#钢支座的液态模锻制备工艺及组织性能分析

目的:以45#钢支座为典型制件对钢质液态模锻制备工艺过程进行分析与优化.研究不同工艺参数对制件组织性能的影响,对制件不同位置的组织性能进行探讨,优化和改善液态模锻钢制制件性能,为钢制制件的液态模锻制备提供理论依据.
创新点:1. 利用数值模拟软件模拟分析了钢质液态模锻工艺过程,为试验分析提供理论依据;2. 对制件不同位置的组织性能分析,探讨了塑性变形在液态模锻工艺过程中的影响.
方法:1. 采用ProCAST模拟软件对45#钢液态模锻的凝固过程、温度场及应力场的变化进行模拟(图6~8),并对液态模锻工艺过程进行理论优化;2. 采用单一变量法,讨论浇注温度和保压时间对成型件的微观结构、机械性能和耐磨性的影响(图9~12);3. 研究成型制件不同位置的微观组织、力学性能和断裂行为(图14,16和17),并讨论液态模锻工艺过程中塑性变形对制件组织性能的影响;4. 探讨分析45#钢支座的动态成形工艺(图18),并研究45#钢的液态模锻整体工艺过程.
结论:1. 熔融金属的最佳浇注温度和保压时间分别在1540~1560 °C和35~40 s.2. 在浇注温度为1540 °C和保压时间为35 s时,液态锻造制备的45#钢支座具有最佳的组织性能;此时支座盘边缘的抗拉强度、伸长率、维氏硬度和摩擦系数分别为783.4 MPa、17.1%、242.7和0.36.3. 45#钢支座不同位置的组织性能差异不大,但由于塑性 变形的原因,中间位置的性能表现优于边缘位置.4. 45#钢支座的液态锻造工艺过程相对较复杂,包含不同的金属液对流和塑性变形;这些特殊的过程导致45#钢支座的组织性能相对优异.

关键词:45#钢;液体锻造;数值模拟;力学性能;耐磨性;断裂行为

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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