Preparation and Characterization of Spray Formed 2060 High Speed Steel

2016 ◽  
Vol 850 ◽  
pp. 603-609 ◽  
Author(s):  
Xin Lei Ni ◽  
Zhou Li ◽  
Hua Yuan ◽  
Wen Yong Xu ◽  
Guo Qing Zhang
Keyword(s):  
High Speed ◽  
Hot Forging ◽  
High Speed Steel ◽  
Subsequent Development ◽  
Spray Forming ◽  
Peak Hardness ◽  
Forming Process ◽  
Tempering Temperature ◽  
Equiaxed Grains ◽  
Microstructure Refining

Spray forming has attracted considerable attention for the production of high speed steels due to its potential and priority in the microstructure refining and cost saving. In this study, high-quality large billets of 2060 high speed steel were successfully produced by spray forming process using a twin-atomizer facility. As-deposited billet was subsequently processed by hot forging, quenching in oil at 1180 °C and a triple tempering in the temperature range of 500-580 °C. The microstructures and hardness of the deposit and their subsequent development resulting from hot forging and heat treatment were investigated. This paper was designed to provide insight and have a better understanding of such a system for the steel. The results showed that the as-deposited microstructure was composed of the fine equiaxed grains with V-rich MC and W-Mo-rich M2C carbides non-uniformly distributed along the grain boundaries and inside the grains. M2C presented rod-like or unconnected net-shaped morphologies in the as-deposited microstructure. Following hot forging, metastable M2C carbides were completely decomposed into refined MC and M6C nearly spherical carbides uniformly distributed throughout the microstructure. A hardness value of 31HRC was attained for the spray deposited and hot forged samples. With increasing the tempering temperature, hardness was increased firstly and then decreased. Secondary hardening peak appeared at 540 °C for spray formed 2060 steel austenitized at 1180 °C, and the corresponding peak hardness reached 71HRC.

scholarly journals Cutting Performance of High-Speed Steel End Mill Produced by Spray Forming Process.

1992 ◽  
Vol 58 (7) ◽  
pp. 1203-1208
Author(s):  
Etsuhiko YABUUCHI ◽  
Yasuyuki KUROSHIMA ◽  
Masahiro MASUDA ◽  
Minoru KUBOBUTI ◽  
Yoshio IKAWA
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Spray Forming ◽  
Cutting Performance ◽  
End Mill ◽  
Forming Process

Microstructures and Thermostability of Spray Formed Nb-Containing High Speed Steel

2011 ◽  
Vol 418-420 ◽  
pp. 3-7
Author(s):  
Yi Peng Yu ◽  
Jin Feng Huang ◽  
Hua Cui ◽  
Yuan Hua Cai ◽  
Ji Shan Zhang
Keyword(s):  
Cooling Rate ◽  
High Speed ◽  
High Speed Steel ◽  
Spray Forming ◽  
Eutectic Carbide ◽  
Cast Steels ◽  
Primary Carbides ◽  
Equiaxed Grains ◽  
Nb Addition ◽  
Nb Additions

The M3 type high speed steel billets with / without Nb addition were prepared via spray forming. The effects of cooling rate and Nb on the microstructures and property of the M3 type high speed steel were investigated. The results show that the as-cast steels contain coarse primary dendrites and M2C eutectic carbide, but the equiaxed grains and fine carbides are formed in the spray-formed steels. It can be seen that carbide precipitation and grain growth were suppressed by high cooling rate. The Nb additions can change the types of primary carbides. The solidified carbide microstructure was effectively changed from M2C to M6C type during the cooling of hot spray-formed billet. Niobium improves the microstructural thermostability of the M3 type high speed steel during heat treatments.

Study on CPM9V High Speed Steel Ring Prepared by Spray Forming

2011 ◽  
Vol 311-313 ◽  
pp. 624-630
Author(s):  
Yi Xu ◽  
Chang Chun Ge
Keyword(s):  
High Speed ◽  
Technological Parameter ◽  
Preparation Method ◽  
High Speed Steel ◽  
Alloy Element ◽  
Spray Forming ◽  
Regular Shape ◽  
Carbide Morphology ◽  
Carbide Particles ◽  
Deposition Substrate

CPM9V high speed steel(HSS) ring billet was prepared by spray forming(SF), the yield is 83.5%, porosity is 0.8%, spray forming preparation method and technological parameter were illustrated. The microstructure and carbide morphology on the different position of billet were observed. The results show that carbide particles have small size, regular shape and uniform distribution, alloy element without segregation. There are some pores and defects in the position of ring billet closed to deposition substrate, come from spray forming instability beginning stage.

Performance of a Matrix Type High Speed Steel after Deep Cryogenic and Low Tempering Temperature

2021 ◽  
Vol 1016 ◽  
pp. 1423-1429
Author(s):  
Kaweewat Worasaen ◽  
Andreas Stark ◽  
Karuna Tuchinda ◽  
Piyada Suwanpinij
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cryogenic Treatment ◽  
High Speed Steel ◽  
High Energy ◽  
Single Step ◽  
Deep Cryogenic Treatment ◽  
Tempering Temperature ◽  
Matrix Type ◽  
Bcc Structure

A matrix type high speed steel YXR3 designed for a combination of wear resistance and toughness is investigated for its mechanical properties after hardening by deep cryogenic treatment follow by tempering. The deep cryogenic quenching carried out at -200 °C for 36 hours and the single step tempering results in an obvious improvement in wear resistance while balancing the toughness, comparing with the conventional quenching followed by a double tempering treatment. The quantitative image analysis reveals little difference in the MC carbide size distribution between tempering at different temperatures. The synchrotron high energy XRD confirms the MC type carbide with some evolution in its orientation together with tempered martensite approaching the BCC structure at higher temperatures. In contrary to the conventional quenching and tempering, the lowest tempering temperature at 200 °C yields a moderate drop in hardness with increase in surface toughness proportionally while exhibiting exceptional wear resistance. Such thermal cycle can be recommended for the industry both for the practicality and improved tool life.

scholarly journals Effects of Tempering Temperature on Wear Resistance and Surface Roughness of a High Speed Steel Roll.

2001 ◽  
Vol 41 (8) ◽  
pp. 859-865 ◽  
Author(s):  
Jung Ho Lee ◽  
Jun Cheol Oh ◽  
Joon Wook Park ◽  
Hui Choon Lee ◽  
Sunghak Lee
Keyword(s):  
Surface Roughness ◽  
Wear Resistance ◽  
High Speed ◽  
High Speed Steel ◽  
Tempering Temperature ◽  
Steel Roll

Spray forming high speed steel—properties and processing

2004 ◽  
Vol 383 (1) ◽  
pp. 87-95 ◽  
Author(s):  
Rafael Agnelli Mesquita ◽  
Celso Antonio Barbosa
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Spray Forming ◽  
Steel Properties

Effect of niobium and austenitizing temperature on the microstructures and properties of spray-deposited AISI M3:2 high speed steel

2021 ◽  
Vol 119 (1) ◽  
pp. 102
Author(s):  
Hebin Wang ◽  
Da Hong ◽  
Longgang Hou ◽  
Li Shen ◽  
Ping Ou ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Boundaries ◽  
High Speed ◽  
High Speed Steel ◽  
High Hardness ◽  
Spray Forming ◽  
Precipitation Strengthening ◽  
Austenitizing Temperature ◽  
The Matrix ◽  
Red Hardness

The microstructure and properties of niobium-containing AISI M3:2 high speed steels (HSSs) fabricated by spray forming and traditional casting have been investigated. The results show that fine and uniformly-distributed grains without macrosegregation appeared in the as-deposited HSSs that differ from those of as-cast HSSs. Nb mostly appears in primary MC carbides, whereas it contributes less to the formation of M6C carbides. The high stabilization of Nb-rich MC carbides can pin the grain boundaries during high-temperature austenitizing process, thus conferring a fine grains and raising the content of dissolved alloying elements. Enhanced precipitation strengthening and fine dispersion of NbC carbides throughout the matrix contribute to the high hardness and red hardness of Nb-containing HSS.

Complexing Agent on the Surface of Magnesium Alloy Plating of Ni-B Alloy

2011 ◽  
Vol 311-313 ◽  
pp. 327-330 ◽  
Author(s):  
Yu Cai ◽  
Zhen Zhen Chang ◽  
Chun Mei Chen ◽  
Yu Ting Bai ◽  
Ya Wei Lin ◽  
...  
Keyword(s):  
High Speed ◽  
Preparation Method ◽  
High Speed Steel ◽  
Alloy Element ◽  
Spray Forming ◽  
Complexing Agent ◽  
Regular Shape ◽  
Carbide Morphology ◽  
Carbide Particles ◽  
Deposition Substrate

CPM9V high speed steel(HSS) ring billet was prepared by spray forming(SF), the yield is 83.5%, porosity is 0.8%, spray forming preparation method and technological parameter were illustrated. The microstructure and carbide morphology on the different position of billet were observed. The results show that carbide particles have small size, regular shape and uniform distribution, alloy element without segregation. There are some pores and defects in the position of ring billet closed to deposition substrate, come from spray forming instability beginning stage.

An Overview of the Microstructures Present in High-Speed Steel -Carbides Crystallography

2006 ◽  
Vol 530-531 ◽  
pp. 48-52 ◽  
Author(s):  
M.M. Serna ◽  
Edilson Rosa Barbarosa Jesus ◽  
E. Galego ◽  
Luís Gallego Martinez ◽  
H.P.S. Corrêa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Chemical Composition ◽  
First Principles ◽  
High Speed ◽  
High Speed Steel ◽  
High Hardness ◽  
Spray Forming ◽  
Steel Matrix ◽  
X Ray Diffraction ◽  
X Ray

The aim of the work was to prepare an overview about the microstructures present in high-speed steel, focused on the crystallography of the carbides. High-speed steels are currently obtained by casting, powder metallurgy and more recently spray forming. High-speed steels have a high hardness resulting from a microstructure, which consists of a steel matrix (martensite and ferrite), in which embedded carbides of different crystal structure, chemical composition, morphology and size, exist. These carbides are commonly named MxC, where M represents one or more metallic atoms. These carbides can be identified by X-ray diffraction considering M as a unique metallic atom. In this work, it is discussed, in basis of the first principles of physics crystallography, the validation of this identification when it is considered that other atoms in the structure are substitutional. Further, it is discussed some requirements for data acquisition that allows the Rietveld refinement to be applied on carbide crystallography and phase amount determination.

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