纳米晶304不锈钢板材的深度轧制技术及其力学与腐蚀性能研究进展  

The Progress on Mechanical and Corrosion Properties of Nanocrystalline 304 Stainless Steel Plate Produced by Severe Rolling Technique

作　　者：王胜刚[1] 孙淼[1] 龙康[1] 

机构地区：[1]沈阳材料科学国家(联合)实验室中国科学院金属研究所,沈阳110016

出　　处：《精密成形工程》2017年第3期1-7,共7页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(51171199)

摘　　要：介绍了采用深度轧制技术制备的纳米晶304不锈钢板材的力学与腐蚀性能。与普通304不锈钢相比,纳米晶304不锈钢的屈服和抗拉强度同时提高,且延伸率30%以上,拉伸性能提高。相同变幅度条件下,纳米晶304不锈钢应变疲劳的疲劳寿命和疲劳强度同时提高,抗应变疲劳性能提高。在650℃下、Na Cl-Na2SO4混合熔盐和不同浓度盐酸溶液中,纳米晶304不锈钢局部腐蚀阻力提高、腐蚀速度减少并形成致密氧化膜,耐腐蚀性能提高。从纳米晶和普通304不锈钢的价电子结构以及氧化膜电子结构的角度,分析了纳米晶304不锈钢耐腐蚀性能提高的本征因素。The mechanical and corrosion properties of nanocrystalline 304 stainless steel（BN-SS304） plate produced by severe rolling technique are introduced in this paper. Compared with conventional polycrystalline 304 stainless steel（CP-SS304） counterparts, the yield and tensile strengths of BN-SS304 are higher than those of CP-SS304 respectively, and the elongation of BN-SS304 is larger than 30%, these results indicate that the tensile properties of BN-SS304 is improved. Under the same strain amplitude, the fatigue life and strength of BN-SS304 were simultaneously enhanced during strain fatigue at room temperature, which means that the strain fatigue resistance of BN-SS304 is improved. In 650 ℃ Na Cl-Na_2SO_4 mixed molten salt and different-concentration HCl solutions, the enhanced localized corrosion resistance, the decrement of corrosion rate and formation of compact oxide film, can demonstrate that the corrosion resistance of BN-SS304 is enhanced at these corrosion cases. In this work, authors understand the intrinsic factors responsible for the enhanced corrosion resistance of BN-SS304 at the angle of its valence electron structures and electronic structures of oxide film.

关 键 词：深度轧制技术 304不锈钢 力学性能 腐蚀性能 

分 类 号：TG335[金属学及工艺—金属压力加工]