Effects of nitrogen on predominant sintering mechanism during the initial stage of high nitrogen nickel-free stainless steel powder

Shen, Hongren; Zou, Jianpeng; Li, Yimin; Li, Dongyang; Yan, Yu; Wang, Xiao

doi:10.1016/j.jallcom.2023.169230

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…This effect corresponds with other authors' investigations [30]. Without a doubt, the nitrogen-rich atmosphere strengthens the structure of stainless steel, which has already been well documented in the literature [31][32][33]. Unfortunately, all sinters produced are characterized by lower corrosion resistance than commercial steel 316 L, and in the case of 316 L/TC material sintered in an Ar-10% H2 atmosphere, resistance was even worse than the support material.…”

Section: Discussionsupporting

confidence: 89%

“…Similar phases can be seen in Co-Cr-Mo alloys sintered in a nitrogen-rich atmosphere [47]. The latest research results confirm the separation of these phases and, additionally, a decrease in the sinterability of steel, which increases porosity, which in turn decreases mechanical properties and corrosion resistance [32]. Interpretation of some test results is quite difficult.…”

Section: Discussionsupporting

confidence: 54%

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Manufacturing of Corrosion-Resistant Surface Layers by Coating Non-Alloy Steels with a Polymer-Powder Slurry and Sintering

Matula

Tomiczek

2023

Materials

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This paper describes the combination of surface engineering and powder metallurgy to create a coating with improved corrosion resistance and wear properties. A new method has been developed to manufacture corrosion-resistant surface layers on steel substrate with additional carbide reinforcement by employing a polymer-powder slurry forming and sintering. The proposed technology is an innovative alternative to anti-corrosion coatings applied by galvanic, welding or thermal spraying techniques. Two different stainless-steel powders were used in the research. Austenitic 316 L and 430 L ferritic steel powders were selected for comparison. In addition, to improve resistance to abrasive wear, coatings containing an additional mixture of tetra carbides (WC, TaC, TiC, NbC) were applied. The study investigates the effects of using multicomponent polymeric binders, sintering temperature, and atmosphere in the sintering process, as well as the presence of reinforcing precipitation, microstructure and selected surface layer properties. Various techniques such as SEM, EDS, hardness and tensile tests and corrosion resistance analysis are employed to evaluate the characteristics of the developed materials. It has been proven that residual carbon content and nitrogen atmosphere cause the release of hard precipitations and thus affect the higher mechanical properties of the obtained coatings. The tensile test shows that both steels have higher strength after sintering in a nitrogen-rich atmosphere. Nitrogen contributes over 50% more to the tensile strength than an argon-containing atmosphere.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 54%

Manufacturing of Corrosion-Resistant Surface Layers by Coating Non-Alloy Steels with a Polymer-Powder Slurry and Sintering

Matula

Tomiczek

2023

Materials

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“…The X-ray diffraction pattern of the as-received 40Cr15Mo2VN indicates that its phase composition consisted of only ferrite. Meanwhile, no obvious peaks assigned to austenite or nitride were observed due to the relatively low nitrogen content [28,29] The IPF map further confirms that 40Cr15Mo2VN consisted of equiaxed crystals that exhibited a relatively uniform grain size and aggregation of <110>, <200> and <211> orientations. The average grain size was approximately 10 µm, which is lower than that of typical austenitic highnitrogen stainless steel [20].…”

Section: Microstructurementioning

confidence: 67%

The Tribocorrosion Behavior of High-Nitrogen Bearing Stainless Steel in Acetic Acid at Various Applied Loads

Wang

et al. 2023

Metals

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High-nitrogen stainless steels, which are developed by replacing nickel with nitrogen, have been widely applied in manufacturing wear parts in mechanical engineering. In this study, the tribocorrosion performance of a ferritic high-nitrogen bearing stainless steel (40Cr15Mo2VN) under acetic acid solution with a pH of 3.0 was investigated under different loads ranging from 25 N to 125 N. Quantitative calculations indicated that pure mechanical wear was the predominant cause of material degradation, while the corrosion-accelerated wear component also played a crucial role. The material loss induced by both tribocorrosion and mechanical wear increased with increasing load, leading to severe delamination at sliding surfaces and larger wear debris.

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Fabrication of Spherical Steel Powder with Superequilibrium Nitrogen Content for Laser Powder Bed Fusion Additive Manufacturing

Ozerskoi,

Razumov,

Silin

et al. 2024

JOM

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Effects of nitrogen on predominant sintering mechanism during the initial stage of high nitrogen nickel-free stainless steel powder

Cited by 6 publications

References 34 publications

Manufacturing of Corrosion-Resistant Surface Layers by Coating Non-Alloy Steels with a Polymer-Powder Slurry and Sintering

Manufacturing of Corrosion-Resistant Surface Layers by Coating Non-Alloy Steels with a Polymer-Powder Slurry and Sintering

The Tribocorrosion Behavior of High-Nitrogen Bearing Stainless Steel in Acetic Acid at Various Applied Loads

Fabrication of Spherical Steel Powder with Superequilibrium Nitrogen Content for Laser Powder Bed Fusion Additive Manufacturing

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