Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2013 - zeszyt 4

Microstructure and properties of carburized surface layer in 21NiCrMnV4-3-2-2 steel after austempering

nr katalogowy: 79740

Economic progress, various economic factors and necessity of sawing raw materials require improvement and optimization of properties of engineering materials. Development of surface engineering techniques, aimed at improving properties of the surface layer of materials, including hardness, resistance to corrosion and wear resistance, helps to achieve this goal. Carburizing is one of the basic and the oldest methods of surface treatment of steel. It is used to increase durability of machine parts as a result of changes in the chemical composition, phase composition and microstructure of the surface layer of steel. The most modern variant of this process is vacuum carburizing that is carried out under reduced pressure of working atmosphere [1, 2]. High mechanical and functional parameters of carburized case are usually obtained by hardening and low-temperature tempering. However, hardening after carburizing frequently leads to strains or even cracking of processed steel elements [1, 3]. In this paper we have applied a non-conventional method of austempering within the scope of a bainitic transformation of 21NiCrMnV4-3-2-2 steel previously subjected to vacuum carburizing. Such treatment should largely eliminate hardening distortions and thus reduce distortions of the workpiece. The aim of this study was to check the effect of austempering on hardness and abrasive resistance of the surface layer of processed steel as compared to properties of steel after conventional carburizing with hardening and low-temperature tempering. MATERIALS AND METHODS The tests have been carried out on 21NiCrMnV4-3-2-2 steel, which is not included in the standards. Chemical composition of steel has been designed at Institute of Precision Mechanics [4]. The chemical composition of steel has been determined by optical emission spectroscopy with spark source ionization. Results of the determination are given in Table 1. A characteristic feature of this g[...]

Jeśli masz wykupiony/przyznany dostęp - zaloguj się. Skorzystaj z naszych propozycji zakupu!

Publikacja


e-Publikacja (format pdf) - nr 79740 "Microstructure and proper..." licencja: Osobista Produkt cyfrowy	10.00 zł

Zeszyt


INŻYNIERIA MATERIAŁOWA - e-zeszyt (pdf) 2013-4 licencja: Osobista Produkt cyfrowy	65.00 zł

Prenumerata

INŻYNIERIA MATERIAŁOWA - prenumerata cyfrowa
licencja: Osobista

Produkt cyfrowy
Nowość

402.00 zł

INŻYNIERIA MATERIAŁOWA - papierowa prenumerata roczna + wysyłka
licencja: Osobista

Szczegóły pakietu

Nazwa
INŻYNIERIA MATERIAŁOWA - papierowa prenumerata roczna	492.00 zł brutto 455.56 zł netto 36.44 zł VAT (stawka VAT 8%)
INŻYNIERIA MATERIAŁOWA - pakowanie i wysyłka	21.00 zł brutto 17.07 zł netto 3.93 zł VAT (stawka VAT 23%)

513.00 zł

INŻYNIERIA MATERIAŁOWA - PAKIET prenumerata PLUS
licencja: Osobista

Szczegóły pakietu

Nazwa
INŻYNIERIA MATERIAŁOWA - PAKIET prenumerata PLUS (Prenumerata papierowa + dostęp do portalu sigma-not.pl + e-prenumerata)	600.00 zł brutto 555.56 zł netto 44.44 zł VAT (stawka VAT 8%)

600.00 zł

Zeszyt

2013-4

Twój Koszyk

Publikacja

Zeszyt

Prenumerata

Zeszyt

Czasopisma