1. College of Materials Science and Engineering, Hunan University, Changsha 410082, China; 2. Jiangxi An Er Tai Alloy and Technology Co., Ltd, Xinyu 338012, China
Abstract：In this work, a high carbon and niobium-containing stainless steel Fe-13Cr-0.5Mo-3Nb was proposed. A porous breathable steel was fabricated by powder metallurgy. The effects of powder size, green density, sintering temperature on the structures and properties of the steel were studied. And the applying property of injection molded was researched. The results show that the breathable steel has high strength, good breathability and excellent corrosion resistance prepared by the powder size of 96-120 μm, the average green density is 5.6 g/cm3, and the sintering temperature is 1 280 ℃. The yield strength and corrosion resistance of the breathable steel are 295 MPa and 0.016 mm/y, respective. Moreover, the surface quality of the injection molded product can be improved. Compared with imported similar materials, the mechanical properties of die strength index can be improved obviously on the basis of ensuring good air breathability and corrosion resistance.
[1] ESSA K, JAMSHIDI P, ZOU J, et al.Porosity control in 316L stainless using cold and hot isostatic pressing[J]. Materials and Design, 2018, 138(15): 21-29. [2] AHSAN M N, PAUL C P, KUKREJA L M, et al.Porous structures fabrication by continuous and pulsed laser metal deposition for biomedical applications; modelling and experimental investigation[J]. Journal of Materials Processing Technology. 2011, 211(4): 602-609. [3] 吴树海, 王霏, 张际亮, 等. 多孔不锈钢材料的制备及孔隙控制[J]. 材料科学与工艺, 2016, 24(3): 55-61. WU Shuhai, WANG Fei, ZHANG Jiliang, et al.Preparation and pore control of porous stainless steel[J]. Materials science and technology, 2016, 24(3): 55-61. [4] TANG H P, WANG J Z, ZHU J L, et al.Fractal dimension of pore-structure of porous metal materials made by stainless steel powder[J]. Powder Technology, 2012, 217: 383-387. [5] 徐颖, 李珊, 王常力, 等. 不锈钢纤维多孔材料吸声性能的研究[J]. 西北工业大学学报, 2015(3): 401-405. XU Ying, LI Shan, WANG Changli, et al.Exploring sound absorption performance of stainless steel fiber porous materials[J]. Journal of Northwestern Polytechnical University, 2015, 3: 401-405. [6] 杨翔鹏, 王霏, 张际亮, 等. 多孔不锈钢的制备及其在注塑模具中的应用[J]. 材料科学与工程学报, 2017, 35(5): 796-800. YANG Xiangpeng, WANG Fei, ZHANG Jilian, et al.Preparation of porous stainless steel and its application in injection mold[J]. Journal of Materials Science & Engineering, 2017, 35(5): 796-800. [7] 蒋炳炎, 邱庆军, 翟瞻宇, 等. 气动脱模用多孔材料的气体流动性能[J]. 中南大学学报(自然科学版), 2011, 42(9): 2663-2668. JIANG Bingyan, QIU Qingjun, ZHAI Zhanyu, et al.Air flow properties of porous material for pneumatic demolding system[J]. Journal of Central South University (Science and Technology), 2011, 42(9): 2663-2668. [8] 吴峥强. 模具排气问题的新技术研究及实验应用[J]. 科技视界, 2012(29): 172-173. WU Zhengqiang.New technology research and experimental application of mold exhaust problem[J]. Science & Technology Vision, 2012, 29: 172-173. [9] WANG Guilong, ZHAO Guoqun, ZHANG Lei, et al.Lightweight and tough nanocellular PP/PTFE nanocomposite foams with defect-free surfaces obtained using in situ nanofibrillation and nanocellular injection molding[J]. Chemical Engineering Journal, 2018, 350: 1-11. [10] 谭志强, 叶健, 徐玉秀. 烧结316L透气模具钢的研究[J]. 现代制造技术与装备, 2010, 3: 33-34. TAN Zhiqiang, YE Jian, XU Yuxiu.Research of powder metallurgical 316L stailnless die steel[J]. Modern Manufacturing Technology and Equipment, 2010, 3: 33-34. [11] XIE F, HE X, CAO S, et al.Structural and mechanical characteristics of porous 316L stainless steel fabricated by indirect selective laser sintering[J]. Journal of Materials Processing Technology. 2013, 213(6): 838-843. [12] MIRZAEI M, PAYDAR M H.A novel process for manufacturing porous 316, L stainless steel with uniform pore distribution[J]. Materials & Design, 2017, 121(5): 442-449. [13] 吴树海,透气钢的制备及性能分析[D]. 厦门: 华侨大学, 2016: 2-4. WU Shuhai.Study on the preparation and performance of the breathable steel[D]. Xiamen: Huaqiao University, 2016: 2-4. [14] 陈慕容, 江垚, 林良武. 粉末粒度对Ti-35A1多孔材料孔结构的影响[J]. 粉末冶金材料科学与工程, 2011, 16(4): 635-640. CHEN Murong, JIANG Yao, LIN Liangwu.Effect of powder size on the pore structure of Ti-35A1 porous material[J]. Materials Science and Engineering of Powder Metallurgy, 2011, 16(4): 635-640. [15] 叶先勇, 刘京雷, 徐宏, 等.粉末粒径和压制压力对316L不锈钢多孔材料结构特性的影响[J]. 粉末冶金材料科学与工程, 2013, 18(3): 409-414. YE Xianyong, LIU Jinglei, XU Hong, et al.Effects of powder size and molding pressure on structural characterization of 316L stainless steel porous material[J]. Materials Science and Engineering of Powder Metallurgy, 2013, 18(3): 409-414. [16] KONG Decheng, NI Xiaoqing, DONG Chaofang, et al.Anisotropy in the microstructure and mechanical property for the bulk and porous 316L stainless steel fabricated via selective laser melting[J]. Materials Letters, 2019, 235(15): 1-5. [17] JAROSLA V, MACHOV A, MICHAEL A, et al.Highly porous low elastic modulus 316L stainless steel scaffold prepared by selective laser melting[J]. Materials Science and Engineering: C, 2016, 69: 631-639. [18] 国家市场监督管理总局, 中国国家标准化管理委员会GB/T 19292 中国国家标准化管理委员会GB/T 19292.2—2018 金属和合金的腐蚀大气腐蚀性第2部分: 腐蚀等级的指导值[S]. 中国标准出版社, 2018. State Administration of market supervision and Administration, Standardization Administration of the People’s Repub GB/T 19292 GB/T 19292.2—2018 Corrosion of metals and alloys, Atmospheric corrosivity, part 2: Guidance value for corrosion grade[S]. Standards Press of China, 2018. [19] MARKWITZ A, KENNEDY J.Molecular carbon nitride ion beams for enhanced corrosion resistance of stainless steel[J]. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2017: 409(15): 86-90. [20] JUNG K M, SOOHOON, KIM Y J, et al. Alloy design employing high Cr concentrations for Mo-free stainless steels with enhanced corrosion resistance[J]. Corrosion Science, 2018, 140(1): 61-72. [21] REN Xueping, CHEN Xiaohui, XIONG Zhiping.Characterization and analysis of diffusion bonding process in a Cr25Ni7Mo4MnSi duplex stainless steel[J]. Journal of Manufacturing Processes, 2018, 34(Part): 603-613.
2019, Vol. 24 
