Adaptation of High-Chromium Refractory Alloy VZh159 (Haynes 282) to Selective Laser Melting

IF 0.6 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
A. G. Evgenov, S. V. Shurtakov, S. M. Prager, D. V. Zaitsev
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引用次数: 0

Abstract

Refractory high-chromium alloy VZh159 (Haynes 282) obtained by the method of selective laser melting (SLM) is studied. C-curves of the precipitation of particles of a topologically closed-packed (tcp) phase are plotted for the temperature range of heat treatment and operation. It is shown that the content of the tcp-particles of unfavorable morphology increases and the ductility of the synthesized material during synthesis in a protective nitrogen environment decreases with increase in the chromium content in the alloy. The intensification of the precipitation of the particles of the tcp-phase is associated with decrease in the solubility of chromium in the solid solution at high temperatures due to elevation of the nitrogen content in the alloy. To stabilize the alloying system, the chromium content in alloy VZh159 is reduced by 1 wt.% with respect to the upper and lower alloying limits as compared to the deformable counterpart, which makes it possible to prevent marked lowering of the ductility of VZh159 fabricatedby SLM.

Abstract Image

高铬耐火合金 VZh159(Haynes 282)对选择性激光熔化的适应性
研究了通过选择性激光熔化(SLM)方法获得的难熔高铬合金 VZh159(Haynes 282)。绘制了在热处理和操作温度范围内拓扑封闭堆积(tcp)相颗粒析出的 C 曲线。结果表明,随着合金中铬含量的增加,在氮气保护环境下合成时,不利形态的 tcp 颗粒含量增加,合成材料的延展性降低。tcp 相颗粒析出的加剧与合金中氮含量的增加导致固溶体中铬的溶解度在高温下降低有关。为了稳定合金体系,与可变形合金相比,VZh159 合金中的铬含量在合金上限和下限之间降低了 1 重量%,从而避免了用 SLM 制造的 VZh159 的延展性明显降低。
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来源期刊
Metal Science and Heat Treatment
Metal Science and Heat Treatment 工程技术-冶金工程
CiteScore
1.20
自引率
16.70%
发文量
102
审稿时长
4-8 weeks
期刊介绍: Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.
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