This publication discusses the most important surface hardening methods used on stainless steels marked in italics in the following table. Pdf the heat treatment analysis of e110 case hardening steel. Introduction to surface hardening of steels asm international. Pdf torsional fatigue strength of newly developed case. Carburising steel, generally supplied as rolled to hb 255max. Case hardening steel for medium to high core strength applications. Case hardening is a heat treatment technique in which the steel surface is processed by the addition of carbon. It has a low hardenability and therefore it can show good core features till thicknesses of about 20 mm.
This combination of properties provides wear resistance and fatigue. Carburised and heat treated it develops a hard wear resistance case if about rc 6063, a tough strong core with a typical tensile strength range 1400mpz, in quite. Steel for case hardening these case hardening steels do not contain specific alloying elements other than carbon. Alloy steels are normally case hardened to increase the metal characteristics. Process for steels used in aircraft carburizing and nitriding pdf. Case hardening steels technical fushun special steel. For iron or steel with low carbon content, which has poor to no hardenability. Carburizing steels carburizing steels for case hardening usually have basecarbon contents of approximately 0. Case hardening steel 16mncr5 steel for small section case hardened pieces, requiring a hard surface and a tough core core hardness between 85 kgmm2 and 115 kgm2. Torsional fatigue strength of newly developed case hardening tripaided steel. Case hardening of steel is used for numerous applications including for the manufacture of carbon steel forgings and carbon steel pinions.
Casehardening or surface hardening is the process of hardening the surface of a metal object while allowing the metal deeper underneath to remain soft, thus forming a thin layer of harder metal called the case at the surface. For how long a component meets the requirements and how reliably it withstands sudden peak loads, depends on the material. Contained in din hdbk 404 specifies the technical delivery conditions of case hardening steels such as delivery condition, chemical composition, hardness including. High strength bainitic steel stelmor line, mm wire rod. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. A tough core and a hard case are the desired attributes of casehardened steel components. Surface hardening of stainless steels international stainless steel.
The outer layer of case hardening steel becomes hard, while the. The group of case hardening steels marketed under the brand name carbodur is evidence of the leading international position of edelstahl wittenkrefeld in the field of highstrength, highgrade steels. It is a mncr alloy steel, easily hot machinable and weldable. Case hardening steels interlloy engineering steels. Multiphase structures in case hardening steels following continuous cooling large scattering ags due to the hot rolling deformation. The case hardening of steel an illustrated exposition of the changes in structure and properties induced in steels by cementation and allied processe to download the case hardening of steel an illustrated exposition of the changes in structure and properties induced in steels by cementation and allied processe pdf, please access the web. The case hardening steels presented in this brochure are unalloyed and alloyed special engineering steels with relatively low carbon contents.