低碳钢/高强钢组合结构能够在保证承载能力的前提下减少合金元素用量，降低成本. 文中提出了一种高效、稳定的双丝双钨极氩弧增材制造方法，在400 A大熔敷电流参数下，将低碳钢丝H08Mn2Si与高强钢丝H06MnNi3CrMoA同时送进，开展了熔敷金属的成分调控研究. 结果表明，该方法的熔敷效率达到了2.4 kg/h，通过调整双丝的送丝速度比，在不影响电弧状态的前提下，准确获得了所需的熔敷金属成分，并且熔敷金属的抗拉强度、屈服强度、显微硬度随高强钢含量的增加而线性增加，其调节范围分别为565 ~ 914 ，441 ~ 803 MPa以及206 ~ 327 HV. 最后应用该方法实现了低碳钢/高强钢组合结构的滑动轴承模拟件的成形，在轴承基体与轴承衬之间熔敷了成分梯度过渡层，降低了成形件内部的硬度梯度，有效缓和了界面失配问题.
The mild steel/high-strength steel composite structure can reduce the amount of alloying elements on the premise of ensuring the bearing capacity, and reduce the cost. An efficient and stable method of double wire twin electrode gas tungsten arc additive manufacturing was proposed in this paper. The mild steel wire H08Mn2Si and the high strength steel wire H06MnNi3CrMoA were fed into the molten pool together at the deposition current of 400 A. The composition gradient regulating research of deposited metal was conducted. The results showed that the deposition rate is 2.4 kg/h. The designed composition of the deposited metal can be accurately achieved by adjusting the ratio of wire feed speeds. The tensile strength, yield strength, and micro hardness of the deposited metal increased linearly with the increase of the high-strength steel mass fraction. The ranges of them are 565-914, 441-803 MPa and 206-327 HV respectively. Finally, a sliding bearing with mild steel/high-strength steel composited structure was designed and the additive manufacturing of it was realized using the proposed method. The component gradient transition zone was deposited between the bearing matrix and the bearing bush to reduce the hardness gradient in the forming part. The bimetallic interface mismatch problem was alleviated.
[1] 马玉芳, 沙景华, 闫晶晶, 等. 中国镍资源供应安全评价与对策研究[J]. 资源科学, 2019, 41(7): 1317 - 1328
Ma Yufang, Sha Jinghua, Yan Jingjing, et al. Safety assessment and countermeasures of nickel resource supply in China[J]. Resources Science, 2019, 41(7): 1317 - 1328
[2] 赵菲, 段宣政, 刘子敬, 等. 3D打印一体化低合金钢/中碳钢枪钻界面表征[J]. 焊接学报, 2020, 41(5): 85 - 90
Zhao Fei, Duan Xuanzheng, Liu Zijing, et al. Interface characterization of integrated low alloy steel/medium carbon steel gun drill produced by 3D printing method[J]. Transactions of the China Welding Institution, 2020, 41(5): 85 - 90
[3] Zhang N, Khan T, Guo H, et al. Functionally graded materials: An overview of stability, buckling, and free vibration analysis[J]. Advances in Materials Science and Engineering, 2019, 2019: 1354150.
[4] 王迪, 邓国威, 杨永强, 等. 金属异质材料增材制造研究进展[J]. 机械工程学报, 2021, 57(1): 186 - 198
Wang Di, Deng Guowei, Yang Yongqiang, et al. Research progress on additive manufacturing of metallic heterogeneous materials[J]. Journal of Mechanical Engineering, 2021, 57(1): 186 - 198
[5] Reichardt A, Dillon R, Borgonia J, et al. Development and characterization of Ti-6Al-4V to 304L stainless steel gradient components fabricated with laser deposition additive manufacturing[J]. Materials & Design, 2016, 104(15): 404 - 413.
[6] 席明哲, 张永忠, 涂义, 等. 激光快速成形316L不锈钢/镍基合金/Ti6Al4V梯度材料[J]. 金属学报, 2008, 44(7): 826 - 830
Xi Mingzhe, Zhang Yongzhong, Tu Yi, et al. 316L stainless steel/Ni-based alloy Ti6Al4V gradient materials prepared by laser rapid forming process[J]. Acta Metallurgica Sinica, 2008, 44(7): 826 - 830
[7] Liu Y, Liu C, Liu W, et al. Microstructure and properties of Ti/Al lightweight graded material by direct laser deposition[J]. Materials Science and Technology, 2017, 34(8): 945 - 951.
[8] Shen C, Pan Z, Cuiuri D, et al. Fabrication of Fe-FeAl functionally graded material using the wire-arc additive manufacturing process[J]. Metallurgical & Materials Transactions B, 2016, 47(1): 763 - 772.
[9] Dong B, Pan Z, Shen C, et al. Fabrication of copper-rich Cu-Al alloy using the wire-arc additive manufacturing process[J]. Metallurgical & Materials Transactions B, 2017, 48(1): 3143 - 3151.
[10] Awais Akhtar, Dong Honggang, Xia Yueqing, et al. Lap joining 5052 aluminum alloy to Ti6Al4V titanium alloy by GTAW process with AlSi12 filler wire[J]. China Welding, 2020, 29(3): 1 - 8.
[11] 邹鹏远, 程东海, 刘小萍, 等. 双丝电弧增材梯度材料的工艺性能[J]. 焊接, 2019(10): 12 - 16
Zou Pengyuan, Cheng Donghai, Liu Xiaoping, et al. Processing properties of gradient metal fabricated by double wire arc additive manufacturing[J]. Welding & Joining, 2019(10): 12 - 16
[12] 熊俊. 基于ART算法的双钨极耦合电弧温度场光谱诊断[D]. 哈尔滨: 哈尔滨工业大学, 2010.
Xiong Jun. Spectroscopic diagnosis of temperature distribution of twin-electrode TIG coupling arc based on ART algorithm[D]. Harbin: Harbin Institute of Technology, 2010.
[13] Han Q, Li D, Sun H, et al. Forming characteristics of additive manufacturing process by twin electrode gas tungsten arc[J]. International Journal of Advanced Manufacturing Technology, 2019, 104(1): 4517 - 4526.
[14] 张敏, 周小华, 黄东鎏, 等. 复合材料界面裂纹焊接接头塑性发展方向与复合角依存关系的数值分析[J]. 焊接学报, 2008, 29(6): 9 - 12
Zhang Min, Zhou Xiaohua, Huang Dongliu, et al. Numerical analysis about dependence relation between plastic zone spread direction for welded joints with interface crack and mixity angle of composite material[J]. Transactions of the China Welding Institution, 2008, 29(6): 9 - 12
