Supersolidus Sintering of High Speed Steels: Part 2: Sintering of Tungsten Based Alloys

Wright, Christopher S.; Ögel, Bilgehan; Lemoisson, Fabienne; Bienvenu, Yves

doi:10.1179/pom.1995.38.3.221

Cited by 25 publications

(18 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wright and co-workers [7,1,8] have shown that vacuum sintering of water HSS as T1, M3/2 and M2 is an example of supersolidus liquid phase sintering (SLPS). In particular, Wright [1] has shown that the T os temperature determined from sintering curves corresponds to the solidus temperatures determined by DTA.…”

Section: Discussionmentioning

confidence: 99%

“…However, too much liquid leads to compact distortion. Optimal volume fraction of liquid is system specific [4] and maybe as little as 2% for T1 HSS [8], in excess of 5% for M2 HSS [11] or in excess of 20% for a Fe-0.9%C alloy 12 . 3 shows schematically the sintering window -the temperature band over which acceptable microstructures (i.e.…”

Section: Introduction: Supersolidus Liquid Phase Sintering (Slps) Wasmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Vanadium and Carbon Content on the Sinterability of Water Atomised High Speed Steel Powders

Mascarenhas

Oliveira

Wright

2006

MSF

View full text Add to dashboard Cite

This paper presents the results of an investigation into the sintering behaviour of three vanadium enriched variants of T42 high-speed steel. Powders were prepared by water atomization with vanadium and carbon contents of 6-8 wt% and 2.2 -2.7 wt%, respectively. These were annealed, die pressed and sintered in vacuum. All three alloys were sintered to full density giving "as -sintered" microstructures comprising globular MC carbides dispersed in a martensitic matrix. Optimum sintering temperatures were in the range 1240 -1250ºC with lower optimum temperatures associated with higher carbon levels. Sintering characteristics are correlated with phase diagrams calculated using ThermoCalc™ software and TCFe2000 database. The implications for the design of sinterable vanadium containing high-speed steels are discussed. Introduction: Supersolidus liquid phase sintering (SLPS) was demonstrated by Wright[1] as being the processes through which sintering of high speed steels (HSS) is carried out. In SLPS, prealloyed powders are heated to a temperature intermediate between the solidus and liquidus, Fig. 1. This method has been applied to a number of systems [2,3,4] including HSS [5,6,7,8,9].

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introduction: Supersolidus Liquid Phase Sintering (Slps) Wasmentioning

confidence: 99%

Effect of Vanadium and Carbon Content on the Sinterability of Water Atomised High Speed Steel Powders

Mascarenhas

Oliveira

Wright

2006

MSF

View full text Add to dashboard Cite

show abstract

“…[4][5][6][7]13 This is achieved by a lowering of the solidus temperature with a minimal decrease in the upper phase boundary limit that leads to excessive microstructural coarsening. [4][5][6][7]13 This is achieved by a lowering of the solidus temperature with a minimal decrease in the upper phase boundary limit that leads to excessive microstructural coarsening.…”

Section: Sinteringmentioning

confidence: 99%

“…The MC carbides are the most wear resistant of all. [4][5][6][7][8] Powder injection molding (PIM) of tools steels followed in the late 1990s, allowing for further increased shaping ability. Heat treatment includes austenitizing and quenching, similar to traditional steel; however, because of the high carbon content, retained austenite is present after the quench.…”

Section: Introductionmentioning

confidence: 99%

Metal injection molding (MIM) of high-speed tool steels

Myers¹,

Heaney²

2012

Handbook of Metal Injection Molding

View full text Add to dashboard Cite

“…[22] Even though vacuum is the traditional way of sintering HSS, recent works have shown the advantages of sintering in a flowing atmosphere, such as pure N 2 or in a N 2 -rich atmosphere. [23][24][25][26][27] Due to the high vanadium content of the T15 HSS, a transformation of the vanadium carbides into carbonitrides takes place. These reactions produce a certain amount of free carbon, which can promote the sintering process.…”

Section: Introductionmentioning

confidence: 99%

Starch Consolidation as a New Process for Manufacturing Powder Metallurgy High-Speed Steels

Romano

Velasco

Torralba

2007

Metall Mater Trans A

View full text Add to dashboard Cite

The development of a new method called ''starch consolidation,'' suitable for the production of powder metallurgy (P/M) high-speed steel (HSS) components has been studied. Samples have been consolidated using 1.5, 3.5, and 5 vol pct starch and up to 60 vol pct powder. The high solid loading was achieved by stabilizing the repulsive forces with a small addition (0.01 wt pct) of a dispersant (polyacrylic acid) that resulted in accurate fluidity and consolidation of the prepared slurries. After shaping of the samples, the bending strength of the green bodies was evaluated. Debinding cycles were optimized by comparing carbon and oxygen content in argon, in N 2 -5H 2 , and in pure hydrogen. The three atmospheres showed no significant differences in carbon elimination. To determine the influence of H 2 in a nitrogen-rich atmosphere during sintering, tests were performed at 1230°C in a N 2 -5H 2 and in a nitrogen atmosphere. Pure nitrogen resulted in a microstructure formed by smaller carbides. Heat treatments were performed on the samples with the compositions that gave the best combination of properties. A hardness of 800 HV and a bending strength of 1475 MPa were obtained.

show abstract

Supersolidus Sintering of High Speed Steels: Part 2: Sintering of Tungsten Based Alloys

Cited by 25 publications

References 4 publications

Effect of Vanadium and Carbon Content on the Sinterability of Water Atomised High Speed Steel Powders

Effect of Vanadium and Carbon Content on the Sinterability of Water Atomised High Speed Steel Powders

Metal injection molding (MIM) of high-speed tool steels

Starch Consolidation as a New Process for Manufacturing Powder Metallurgy High-Speed Steels

Contact Info

Product

Resources

About