Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2016 - zeszyt 6

Influence of niobium on the structure and properties of the matrix of high-speed steel with nickel

10.15199/28.2016.6.10

nr katalogowy: 103160
10.15199/28.2016.6.10

The following paper investigates two model alloys simulating the quenched matrix of high-speed steels with an addition of 1.5% Ni, which was enriched with 1% and 2% of Nb to increase abrasion resistance. Based on the alloys’ composition comprising of W, Mo, V and Cr, the simulations of the quenched matrix of the high-speed steels indicate sufficiently high hardenability. The purpose of increasing the nickel content in the composition of such alloys was to increase their crack resistance, whereas the addition of the strongly carbide-forming niobium in amounts of 1% and 2%, balanced by an additional carbon content, was aimed at increasing the abrasion resistance of these steels. The authors of the above mentioned chemical composition concept expect that these types of alloys will be used in the production of tools (rolls) designed for the rolling of metallurgical products which are difficult to produce (flat bars, channel bars and tee bars). The quenching temperature of both alloys was optimised on the base of the so called quenching series. The accurate CCT diagrams and the tempering series for revealing the secondary hardness effect were also performed for these alloys. All investigation stages were accurately documented by metallographic tests. Key words: metallic alloys, high-speed steel, phase transformations, dilatometric investigation, CCT diagrams.1. INTRODUCTION Intensive investigations of high-speed steels and their quenched matrix were carried out at the AGH in Krakow, during the 1970s [1]. The influence of the most important alloying additions to this steel group was determined by, among other things, the influence of the W/Mo ratio content on hardness, bending strength, crack resistance (by KIc method), prior austenite grain size, retained austenite fraction and tempering. The basic alloy of those investigations constituted the matrix of quenched steel HS6-5-2, whose chemical composition: 0.5% C, 2.0% W, 2.8÷3.0% Mo, 4.5÷[...]

Bibliografia

[1] Pacyna J., Mazur A.: Effect of molybdenum on the fracture toughness of high-speed steels quenched matrix. Archiv für das Eisenhüttenwesen 55 (1984) 609÷614.
[2] Wilson R.: Metallurgy and heat treatment of tool steels. Mc Graw-Hill, London (1975).
[3] PGeller Ju. A.: Instrumentalnye stali. Metallurgija, Moskva (1975).
[4] Averbach B. L.: Tool steels. Climax Molybdenum Company (1960).
[5] Roberts G. A., Hamaker J. C.: Tool Steels. Ed.III, ASM, Metals Park (1962).
[6] Malkiewicz T.: Physical metallurgy of ferrous alloys (in polish). PWN, Warszawa (1976).
[7] Pacyna J., Strach M.: The effect of niobium on the structure and properties of the quenched matrix of the 6-5-2 type high-speed steels. Archives of Metallurgy 37 (1992) 387÷395.
[8] Wever F., Rose A.: Atlas zur Wärmebehandlung der Stahle mit dem Werkstoffausschus des Verains Deutsch. T. 1. Max-Planck Institut fūr Eisenforschung in Zsarb. (1954).
[9] Peter W., Finkler H.: Ableitug der Form isotermischer Zeit-Temeratur- Umwandlung-Szaubilder aus der chemischen Zusammensetzung. Archiv für das Eisenhüttenwesen 45 (1974) 533÷540.

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

Publikacja


e-Publikacja (format pdf) - nr 103160 "Influence of niobium on t..." licencja: Osobista Produkt cyfrowy	10.00 zł

Zeszyt


INŻYNIERIA MATERIAŁOWA - e-zeszyt (pdf) 2016-6 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

2016-6

Twój Koszyk

Publikacja

Zeszyt

Prenumerata

Zeszyt

Czasopisma