High Strength Austenite Mn–Ni–Cu–V–C Dispersion Hardened Steel

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials: Applied Research Pub Date : 2022-12-01 DOI:10.1134/S2075113322060132

M. V. Kostina, V. M. Blinov, G. Yu. Kalinin, O. V. Fomina, S. Yu. Mushnikova

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Abstract—This article presents the results of studies of the structure and mechanical properties of high strength austenite chromium-free dispersion hardened Mn–Ni–V–C steel with the yield stress of at least 700 MPa; its composition and hardening method have been selected with consideration that the steel should meet the requirements of high strength and non-magnetization as well as possess a value of electrode potential in chloride media preventing galvanic corrosion during the contact with ferromagnetic low alloy and carbon steels. It has been established that, upon addition of 1–2% Cu to Mn–Ni–V–C steel, on the phase diagram of Fe–Ni–Mn, the region of existence of the γ phase is broadened, and the two phase γ + α region is narrowed and displaced toward lower Mn contents, thus increasing the austenite stability against martensite transformation upon cold deformation. Numerical assessment of the influence of alloying austenite elements Ni, Mn, and Cu on the critical extent of cold plastic deformation leading to formation of deformation martensite in steel is proposed. The temperature range of reverse transformation of this martensite into austenite during annealing has been determined as a function of nickel content in steel. The regularities of dissolution upon heating for quenching and deposition of particles of the hardening carbide phase VC have been studied for dispersion hardened steel with the following composition: 10% Mn; 10% Ni; 2% Cu; 0.3–0.4% C; ~1.4% V. It has been demonstrated that the maximum strength is achieved after quenching from 1150°C and aging at 650°C for 15 h. The cyclic durability of steel increases with the aging duration from 0.7 to 10 h; however, the strength aging close to the maximum leads to a decrease in this performance. Taking into account the performed studies of austenite stability, static and cyclic strength, and durability, the optimum interval of steel alloying with nickel, manganese, and copper has been substantiated, and the optimum mode of thermal tre-atment providing a combination of high strength with good plasticity and toughness of steel has been det-ermined.

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高强度奥氏体Mn-Ni-Cu-V-C弥散硬化钢

摘要:本文介绍了屈服应力至少为700 MPa的高强度奥氏体无铬弥散硬化Mn-Ni-V-C钢的组织和力学性能的研究结果;在选择其成分和硬化方法时，应考虑到钢应满足高强度和不磁化的要求，并在氯介质中具有防止与铁磁性低合金和碳钢接触时电偶腐蚀的电极电位值。结果表明，在Mn - ni - v - c钢中添加1-2% Cu后，Fe-Ni-Mn相图上γ相的存在区域变宽，两相γ + α区变窄并向低Mn含量方向位移，从而提高了奥氏体在冷变形时抗马氏体转变的稳定性。提出了合金化奥氏体元素Ni、Mn和Cu对钢冷塑性变形临界程度导致变形马氏体形成的影响的数值评估方法。在退火过程中，马氏体向奥氏体反向转变的温度范围与钢中镍含量有关。研究了含10% Mn的分散淬火钢在淬火加热时的溶出规律和硬质碳化物相VC的颗粒沉积规律;10%的镍;2%的铜;0.3 - -0.4% C;~1.4% V.在1150℃淬火，650℃时效15 h后达到最大强度，循环耐久性随时效时间从0.7 ~ 10 h而增加;然而，当强度老化接近最大值时，该性能会下降。通过对奥氏体稳定性、静强度、循环强度和耐久性的研究，确定了钢与镍、锰、铜合金的最佳合金化区间，并确定了提供高强度与良好塑性和韧性相结合的最佳热处理模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.