Structure and properties of sintered corrosion-resistant steel manufactured from electroerosive powders

IF 0.6 Q4 METALLURGY & METALLURGICAL ENGINEERING

CIS Iron and Steel Review Pub Date : 2021-12-29 DOI:10.17580/cisisr.2021.02.16

E. Ageev, E. Ageeva, S. Khardikov

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Abstract

Corrosion-resistant steels are characterized by several very valuable properties, thereby they are effectively used in different industries [1–3]. The sintering technology of corrosion-resistant steels has several features which are stipulated by high chromium affinity to oxygen and, respectively, by necessity of use of deeply dried protective media and high temperatures. Single and dual extrusion and sintering within the temperature range 1150–1300 °С are the most frequently applied technological procedures for manufacture of powder corrosion-resistant steels [4–8]. The properties of powder corrosion-resistant steels are generally determined by their porosity, thereby corrosion-resistant steels which are applied at present time are characterized by lower strength (by 10–30 %), plasticity (by 2–3 times) and impact toughness in comparison with the corresponding properties of cast steels. It restricts their application area. Porosity of corrosion-resistant steels has negative effect on corrosion resistance. This problem can be solved owing to use of the spark plasma sintering technology which allows to decrease porosity in sintered alloys to 1 % [9–14]. Additionally, presence of large amount of expensive chromium in corrosion-resistant steels is considered as one of the main problems of their recycling [15–17]. This problem can be solved via comminution of wastes and their secondary use. The existing industrial comminution technologies are characterized by large-scale production facilities, high energy consumption and environmental problems. So, electroerosion method seems to be one of the prospective and not applied industrially technologies for comminution of any conductive material at present time [18, 19]. At present time there are no scientific-technical developments for use of waste particles of corrosion-resistant alloys (which were dispersed by electroerosion) as charge material for manufacture of sintered products from these wastes. Conduction of complex theoretical and experimental investigations is required for these purposes. It will help to solve the problem of porosity decrease for sintered corrosion-resistant alloys and saving the expensive chromium. The aim of this research was examination of structure and properties of sintered samples produced in butyl alcohol and fabricated from corrosion-resistant powders subjected to electroerosion. Obtaining of the new relationships and interactions between composition, structure and properties of sintered corrosion-resistant alloys (from one side) and sintering technology for powder materials fabricated via electric dispersion of 12Kh13 steel wastes are estimated as novelty of this research. To solve the above-noted problem of obtaining low-cost porous-free microstructure of corrosion-resistant steels, the prospective technologies of electroerosion dispersion and spark plasma sintering will be applied. Structure and properties of sintered corrosion-resistant steel manufactured from electroerosive powders

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电蚀粉末烧结耐蚀钢的组织与性能

耐腐蚀钢具有几个非常有价值的特性，因此它们在不同的行业中得到了有效的应用[1-3]。耐腐蚀钢的烧结技术具有几个特点，分别是铬对氧的高亲和力，以及使用深度干燥的保护介质和高温的必要性。在1150–1300°С的温度范围内进行单次和双次挤压和烧结是制造粉末耐腐蚀钢最常用的技术程序[4-8]。粉末耐腐蚀钢的性能通常由其孔隙率决定，因此，与铸钢的相应性能相比，目前使用的耐腐蚀钢具有较低的强度（10-30%）、塑性（2-3倍）和冲击韧性。它限制了它们的应用领域。耐腐蚀钢的孔隙率对耐腐蚀性有负面影响。由于使用了火花等离子体烧结技术，可以将烧结合金的孔隙率降低到1%[9-14]，因此可以解决这个问题。此外，耐腐蚀钢中存在大量昂贵的铬被认为是其回收的主要问题之一[15-17]。这个问题可以通过废物的粉碎和二次利用来解决。现有的工业粉碎技术具有生产设施规模大、能耗高和环境问题等特点。因此，电蚀法似乎是目前任何导电材料粉碎的前瞻性且未在工业上应用的技术之一[18，19]。目前，使用耐腐蚀合金的废弃颗粒（通过电侵蚀分散）作为由这些废物制造烧结产品的炉料，还没有科学技术发展。为了这些目的，需要进行复杂的理论和实验研究。这将有助于解决烧结耐腐蚀合金孔隙率降低的问题，并节省昂贵的铬。本研究的目的是检查在丁醇中生产的烧结样品的结构和性能，该样品由经过电腐蚀的耐腐蚀粉末制成。获得烧结耐腐蚀合金的成分、结构和性能之间的新关系和相互作用（从一个方面），以及通过12Kh13钢废料的电分散制备粉末材料的烧结技术，被认为是本研究的新颖之处。为了解决上述获得低成本无孔耐腐蚀钢微观结构的问题，将应用电腐蚀分散和火花等离子体烧结的前瞻性技术。电腐蚀粉末烧结耐腐蚀钢的组织与性能

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来源期刊

CIS Iron and Steel Review METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

2.50

自引率

12.50%

发文量

期刊介绍： “CIS Iron and Steel Review” is the only Russian metallurgical scientific-technical journal in English, publishing materials about whole spectrum of the problems, innovations and news of foreign iron and steel industry. The mission of this edition is to make foreign specialists aware about scientific and technical researches and development in iron and steel industry in the former USSR countries.