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引用次数: 0
摘要
利用激光粉末床熔融（LBPF）技术，通过增材制造实现了一种高强度铁-铬-钴-镍-钼不锈钢马氏体时效钢。作为后处理的一部分，研究了热等静压（HIPping）和不热等静压（HIPping）的不同热处理循环的效果。与其他多级热处理条件相比，经过零度以下处理和直接老化的原样印制试样达到了规定的性能要求。与未进行 HIP 处理的试样相比，传统的热处理循环表现出最高的强度和精细的马氏体结构，而 HIP 处理过的试样则表现出各向同性的特性。HIPping 还能提高材料的延展性，但由于 HIPping 后操作过程中晶粒粗化，强度降低了 5-10%。
Development, Post Processing and Characterization of Additive Manufactured Stainless Maraging Steel
A high strength Fe–Cr–Co–Ni–Mo stainless maraging steel was realized through additive manufacturing using Laser powder bed fusion (LBPF) technique. As a part of post processing, effect of different heat treatment cycles with and without hot isostatic pressing (HIPping) was studied. The as-printed coupons, subjected to sub-zero treatment and direct aging, were found to meet the specified properties in comparison with other multi-stage heat treatment conditions. Conventional heat treatment cycle exhibited highest strength with fine martensitic structure and HIPed specimens exhibited isotropic properties compared to the un-HIPed specimens. HIPping is found to improve the ductility of material as well, however with a reduced strength by 5–10% owing to grain coarsening in post-HIPping operation.
期刊介绍：
Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering.
Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.
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