Nichtmagnetisierbarer warmbeständiger nichtrostender Stahl für Wälzlager

Abstract

Schlüsselworte: Austenitischer Stahl, Wälzlager, warmbestän-dig, hohe Härte, nicht rostend, nicht magnetisierbar A low cost austenitic chromium manganese steel with about 1 mass% of carbon and nitrogen was molten under normal pressure which reveals an amazing combination of properties. Starting from a yield strength of about 600 MPa it is cold work hardened to 60 HRC. This high hardness is brought about for the first time without a martensitic microstructure which is usual for roller bearings. In addition this steel is stainless, non-magnetic and heating resistant up to about 500 C, i.e. a material to serve under complex loading. Manufacturing by ingot metallurgy, ESR, hot working, solution annealing and machining was carried out on an industrial scale. The investigation of the structure was carried out on several scales, beginning with the electronic structure, the TEM structure, the light optical microscopy up to macro-etchings. In this manner an extensive understanding of the outstanding combination of properties of the steel named CARNIT was derived.

Microstructural changes in high interstitial stainless austenitic steels due to ballistic impact

“…As an example the commercially available material DIPRO 60 M consists of roll bonded maraging steel, one layer with a hardness of ≥60 HRC and the other one with ≥50 HRC [16]. The hardness of CN1.07 was previously raised to 60 HRC by mere cold deformation [17]. Peening with heavy shot or surface rolling may be employed to create a hard/soft layered HIS sheet.…”

Intensive Interstitial Strengthening of Stainless Steels

“…14) without generating ferromagnetic martensite in the racer. [26] The combination of high strength and corrosion resistance makes steel Cr18Mn19C0.35N0.6 a candidate for shafts in pumps. Sleeves for railroad wheels made of PESR melted high nitrogen steel performed very well in Switzerland, but were too expensive.…”

Influence of the PM-Processing Route and Nitrogen Content on the Properties of Ni-Free Austenitic Stainless Steel

“…[8][9][10][11][12][13] Thus, C + N-alloyed CrMn-austenitic steels feature outstanding mechanical properties combined with corrosion resistance, intensive cold work hardenability, and a heating resistance up to 773 K (500°C). [14] Furthermore, the non-magnetic behavior makes this steel grade suitable for applications in environment of strong magnets as are present in magnetic resonance imaging or alternating electric fields. [14,15] Detailed information about the concept of combined alloying of C and N (C + N concept) and the influence of N on the mechanical properties can be extracted from.…”

“…[14] Furthermore, the non-magnetic behavior makes this steel grade suitable for applications in environment of strong magnets as are present in magnetic resonance imaging or alternating electric fields. [14,15] Detailed information about the concept of combined alloying of C and N (C + N concept) and the influence of N on the mechanical properties can be extracted from. [8][9][10][11][12][13] The steel investigated in this work Fe-19Mn-18Cr-0.4C-0.3N was developed in previous studies using the C + N concept.…”