Surface modification of carbon steel with laser treated nitrogen-containing stainless steel layers

Huang, Chong-Cheng; Tsai, Wen‐Ta; Lee, Ju-Tung

doi:10.1016/0257-8972(95)02438-7

Cited by 14 publications

(2 citation statements)

References 14 publications

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“…In laser-powder-welding Cr25Ni25 and Cr25Mn25 powders were mixed with 2 mass% Si3N4 which led to about 0.4 respectively 0.8 mass% N in the deposit (Huang et al 1996). a stainless weld deposit on a low alloy steel substrate thus improving strength and corrosion resistance.…”

Section: Solidificationmentioning

confidence: 99%

High Nitrogen Steels

Gavriljuk¹,

Berns²

1999

Engineering Materials

391

110

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The use of general descriptive names, registered names, trademarks, ete. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.Typesetting: Camera-ready eopies from authors Cover-Design: MEDIO, Berlin Printed on acid-free paper SPIN 10730039 6213020 5 4 3 2 1 0 to BELA and ISOLDE PrefaceDuring the second half of this century the nitrogen concentration of steel moved in both directions: down in constructional grades by oxygen blowing to prevent brittle fracture upon age hardening at ambient temperature and up in stainless grades to improve strength, corrosion resistance and austenite stability. The gradual recognition of the beneficial effects of this element on the properties of high alloy steels led to a widespread development of high nitrogen steels (HNS) documented by numerous applications and the proceedings of five HNS conferences at LilIe (France) 1988, Aachen (Germany) 1990, Kiev (Ukraine) 1993, Kyoto (Japan) 1996 and HelsinkilStockholm (FinnlandISweden) 1998. The word "high" in HNS is not clearly defined but accounts e.g. for 0.1 mass% of nitrogen in creep resistant steels, 0.9 mass% in stainless grades or 2 mass% in tool steels. "High" best refers to "intentionally raised" by appropriate alloying or by pressure and powder metallurgy. For convenience steel grades are designated by their approximate content of alloying elements in mass% omitting unintentional minor additons of Si, Mn, C, P, S asf. As an example Cr22Ni5M03NO.2 stands for a stainless duplex grade.The present book starts by comparing the effects of nitrogen and carbon on the atomic structure and interaction within the crystallattice. Next the constitution of HNS is investigated leading to specific microstructural features. Based on this background the mechanisms behind the mechanical, chemical and tribological properties of HNS are derived. This concludes the fundamentals treated in chapters one to three. Chapter four comes down to shop practice of manufacturing HNS which, in respect to e.g. melting, hot working, and welding, may be quite different from respective carbon grades. In chapter five, different HNS for special applications are presented like e.g. hardenable steels for stainless bearings, high strength austenitic steels for non-magnetic retaining rings, superaustenitic stainless sheet for the chemical industry or solution nitrided impellers for pumps. Chapter six is an attempt to summarize key aspects of HNS.The book is meant for material scientist working in the field of high alloy steels and also for engineers engaged in materials technology, material selection and design. The work covers a wide scope from the atomic structure to the application of HNS and was written by a metal physicist and an engineer.

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Section: Solidificationmentioning

confidence: 99%

High Nitrogen Steels

Gavriljuk¹,

Berns²

1999

Engineering Materials

391

110

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“…Therefore, the resistance of localized corrosion is employed to evaluate the uniformity of the passive film. There are many methods to evaluate pitting corrosion [5,6,7]. The electrochemical method with indicators of pitting potential is employed in this study [8,9].…”

Section: Introductionmentioning

confidence: 99%

Uniformity Analysis of the Passive Film for SS316 Stainless Steel

Lee

Lai

Lee

et al. 2007

KEM

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Passive film of stainless steels possesses good corrosion resistant property. However, the passive film formed in nature is not uniform and the quality is not consistent. It is the major causes for local corrosion. The pitting potential test is a traditional method to test local corrosion of stainless steels. The local corrosion is usually induced by the break-down of the passive film. Therefore, it can be utilized to evaluate the quality of the passive film. Also, because the pitting test is quick and inexpensive, many tests can be performed to evaluate the uniformity of the passive film. This study focuses on SS316 stainless steel. The specimens were treated with electropolishing processes. The original and the processed specimens were tested by pitting potential tests. From these results, the distribution and the uniformity of passive film could be evaluated. An efficient and inexpensive index of the uniformity of the passive film is proposed.

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Laser Material Processing

Steen

1998

372

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Surface modification of carbon steel with laser treated nitrogen-containing stainless steel layers

Cited by 14 publications

References 14 publications

High Nitrogen Steels

High Nitrogen Steels

Uniformity Analysis of the Passive Film for SS316 Stainless Steel

Laser Material Processing

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