Effect of nitrogen on the stabilization of austenite in a tungsten-molybdenum high-speed steel

Popandopulo, A. N.; Zhukova, L. T.

doi:10.1007/bf00699497

Cited by 3 publications

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“…However, these effects are limited to nitrogen precipitated in the form of small precipitates or in a solid solution state. Nitrogen is still an important austenite-forming element, and its ability to expand and stabilize austenite phase area is about 25 times that of Ni element [22], playing a decisive role in martensite phase transformation. Studies [23,24] have shown that nitrogen significantly increased the austenite content in the process of heat treatment in SMSS.…”

Section: Introductionmentioning

confidence: 99%

Effect of nitrogen on microstructure and corrosion resistance of Cr15 super martensitic stainless steel

Chang

2019

Corrosion Engineering, Science and Technology

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To investigate the influence of nitrogen on structure and corrosion resistance of Cr15 super martensitic stainless steels (SMSS), two types (N-free and N-0.12%) of specimens were quenched at 1050°C and tempered at different temperatures, and then, optical microscope, transmission electron microscopy, X-ray diffraction, potentiodynamic polarisation, immersion experiments and Kelvin Probe Force Microscope were used to characterize its microstructures and corrosion properties. The experimental results show that the microstructure in the N-free Cr15 super martensitic stainless steel is a biphasic tissue with alternating martensite and austenite distribution while quenched at 1050°C and tempered between 600 and 700°C. The nitrogen addition increases the content of austenite, and changes the austenite morphology significantly into the coarse block and strip distribution. What's more, micro-galvanic corrosion is formed between austenite and martensite, which deteriorates the corrosion resistance of the SMSS.

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Section: Introductionmentioning

confidence: 99%

Effect of nitrogen on microstructure and corrosion resistance of Cr15 super martensitic stainless steel

Chang

2019

Corrosion Engineering, Science and Technology

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Exploring failure modes of alumina scales on FeCrAl and FeNiCrAl alloys in a nitriding environment

et al. 2020

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A review of progress on high nitrogen austenitic stainless-steel research

Zhang

Jiang

et al. 2021

mat express

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High nitrogen austenitic stainless steels are commonly used in wide range of applications because of their excellent properties, attracting super attention over the past decades. Compared with other metal materials, high nitrogen austenitic stainless steel increases the nitrogen content under the premise that the structure is austenite, giving it excellent mechanical properties and corrosion resistance. Based on relevant documents from the past ten years, this article summarizes and compares three preparation methods for high nitrogen austenitic stainless steels, namely: powder nitriding, melt nitriding and bulk nitriding. They can be divided into six categories according to other differences as explained by the latest research progress on strengthening and toughening mechanism for high nitrogen austenitic stainless steels: composite structure strengthening, fine grain strengthening, precipitation strengthening and strain strengthening. This article also reviews the research progress on excellent properties of high nitrogen stainless steel, including strength, hardness and corrosion resistance. It further describes the emerging nickel-free high nitrogen austenitic stainless steels and its biocompatibility. Welding applications of high nitrogen austenitic stainless steels are also described from three aspects: friction stir welding, arc welding and brass solder. Finally, this article puts forward the development direction of high nitrogen austenitic stainless steels in the future.

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Effect of nitrogen on the stabilization of austenite in a tungsten-molybdenum high-speed steel

Cited by 3 publications

References 0 publications

Effect of nitrogen on microstructure and corrosion resistance of Cr15 super martensitic stainless steel

Effect of nitrogen on microstructure and corrosion resistance of Cr15 super martensitic stainless steel

Exploring failure modes of alumina scales on FeCrAl and FeNiCrAl alloys in a nitriding environment

A review of progress on high nitrogen austenitic stainless-steel research

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