Calculation of Nitrogen Absorption into Austenitic Stainless Steel Plate and Wire

Tsuchiyama, Toshihiro; Fukumaru, Taishiro; Egashira, Makoto; Takaki, Setsuo

doi:10.2355/isijinternational.44.1121

Cited by 15 publications

(6 citation statements)

References 5 publications

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“…Nickel-free austenitic stainless steel products and small precision devices can be easily obtained through this process. Since wires and thin plates are commonly produced in steel-making industry, the effect of nitrogen adsorption on austenitic stainless steel wires and plates has been recently studied by Tsuchiyama et al [92] and Kuroda et al [93]. Yamamoto et al conducted the cytotoxicity tests on Fe-Cr-Mo, Fe-Cr-Mo-N and 316L stainless steels in both static and dynamic conditions to evaluate the biocompatibility of Fe-Cr-Mo-N, a high-nitrogen nickel-free austenitic stainless steel manufactured by nitrogen adsorption [94,95].…”

Section: Development Of High-nitrogen Nickel-free Austenitic Stainlesmentioning

confidence: 99%

Nickel-free austenitic stainless steels for medical applications

Yang

Ren

2010

Science and Technology of Advanced Materials

213

103

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The adverse effects of nickel ions being released into the human body have prompted the development of high-nitrogen nickel-free austenitic stainless steels for medical applications. Nitrogen not only replaces nickel for austenitic structure stability but also much improves steel properties. Here we review the harmful effects associated with nickel in medical stainless steels, the advantages of nitrogen in stainless steels, and emphatically, the development of high-nitrogen nickel-free stainless steels for medical applications. By combining the benefits of stable austenitic structure, high strength and good plasticity, better corrosion and wear resistances, and superior biocompatibility compared to the currently used 316L stainless steel, the newly developed high-nitrogen nickel-free stainless steel is a reliable substitute for the conventional medical stainless steels.

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Section: Development Of High-nitrogen Nickel-free Austenitic Stainlesmentioning

confidence: 99%

Nickel-free austenitic stainless steels for medical applications

Yang

Ren

2010

Science and Technology of Advanced Materials

213

103

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“…There is correlation of increasing hardness with increasing of nitrogen contents of stainless steel after HTGN process [5,9]. The concentration of nitrogen atom in the surface at the same partial pressure is depend on the temperature.…”

Section: Resultsmentioning

confidence: 95%

“…The increasing of the gas pressure resulted in the increasing nitrogen atom which diffused in to stainless steel [4,9]. Nitrogen gas UHP grade and industrial grade have different purity.…”

Section: Resultsmentioning

confidence: 99%

High Temperature Gas Nitriding Treatment of Aisi 430 Using Low and High Purity Nitrogen Gas

Suprihanto

2016

Rot.

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IntroductionOnes of materials which widely use in industry is stainless steel due high resistance to corrosion and appropriate mechanical properties. Stainless steel is ferrous alloys which contains at least 11% chromium. Depending on the phase in the microstructure, stainless steel can be grouped as austenitic, ferritic or martensitic.AISI 430 is the most widely produced ferritic stainless steel. AISI 430 is cheapest and fairly good corrosion resistance in a variety of environments. However in certain uses such as high corrosive environments, the mechanical properties and corrosion resistance are less fulfilling. In order to improve its properties, this stainless steel can be treated by high temperature gas nitriding (HTGN) treatment.HTGN treatment is able to enhance the properties of stainless steel such as strength, hardness, wear resistance and corrosion resistance [1]. These treatments not only improve the properties, but also it can modify the initial phase [2,3]. The research of HTGN treatment for AISI 430 has been conducted by many investigators [4,5]. Depending on the variable process, the micro structure of ferritic stainless steel AISI 430 can be modified into martensitic which hard or austenitic stainless steel which soft and non-magnetic.The basic process of HTGN is by exposing the stainless steel in high purity nitrogen gas atmosphere at temperature 1050 o C ± 50 o C within certain time prior quenching [6]. During the process, nitrogen gas become dissociate into two nitrogen atom prior diffuses into stainless steel.The effects HTGN treatment on the properties of stainless steel depends on the amounts of nitrogen atom which diffuse into stainless steel. The resulting effects depend on the process variable such as chemical composition of stainless steel, temperature process, nitrogen gas pressure and duration of holding time [1,6,7].Generally, the increasing strength obtained after treatment is not higher than increasing of its hardness due to the grain coarsening. Holding time for long duration produce excessive grain size. To overcome grain coarsening, some refinement methods have been developed [8]. The refinement methods promise the prospective application of HTGN treatment in industry.Despite HTGN treatment use high purity nitrogen gas, there are several grade of purity on the market. The highest purity and the most expensive grade is scientific or research grade which has minimum purity 99.9999%. The other grades are ultra high purity (UHP) grade (99.999%), zero grade (99.998%), specialized zero grade (99.998%), oxygen free grade (99.998%) and industrial/welding grade (99.5%). The grade purity of nitrogen gas depends on the percentage of moisture, oxygen, hydrocarbon, and CO x .The most widely available grade is industrial or welding grade. The industrial/welding grade promises in cost production reduction for HTGN treatment. However, the effect of nitrogen gas purity on the effect of HTGN treatment ABSTRACTThe properties of stainless steels can be improved by high temperature gas nitriding (HT...

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“…In addition, the concentration profiles in solution-nitrided specimens correspond well to the predictions made by the diffusion equation of Fick's second law. 8) After solution nitriding for 18 ks, the nitrogen concentration in the specimens is almost uniform to that at equilibrium. In the case of the RSG specimens, the nitrogen concentration at the surface is kept to a low level during vacuum annealing, in contrast to the NSG specimens.…”

Section: Methodsmentioning

confidence: 95%

“…In this study, the solution nitriding technique [6][7][8] was utilized on conventional stable austenitic stainless steel to produce strength-gradient steel sheets that have a continuous strength change through their thickness direction. By this method, the strength profile can be controlled through the thickness direction in steel sheets and is dependent upon the nitrogen concentration distribution.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Strength-Gradient Steel Sheets Produced by Solution Nitriding

et al. 2012

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Solution nitriding and vacuum annealing treatments were applied to type 316L stainless steel plates in order to fabricate steel sheets that have a continuous strength change throughout their thickness direction. We produced three types of strength-gradient steel sheets through these treatments, with the hardness profile of each type of steel sheet reflective of the nitrogen concentration. The mechanical properties of the obtained steel sheets were investigated to demonstrate the effects of a strength gradient. As a result of tensile and bending tests, the uniaxial tensile deformation behavior of strength-gradient steel sheets is never affected by its strength gradient; however, it is governed by the average nitrogen content, while the bending deformation behavior of the sheets is significantly dependent upon the strength gradient through the thickness direction.

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Calculation of Nitrogen Absorption into Austenitic Stainless Steel Plate and Wire

Cited by 15 publications

References 5 publications

Nickel-free austenitic stainless steels for medical applications

Nickel-free austenitic stainless steels for medical applications

High Temperature Gas Nitriding Treatment of Aisi 430 Using Low and High Purity Nitrogen Gas

Mechanical Properties of Strength-Gradient Steel Sheets Produced by Solution Nitriding

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