Microstructure and mechanical properties of M62 high-speed steel powder consolidated by high-temperature gas extrusion

2019 ◽  
Vol 24 (1) ◽  
pp. 52-57 ◽  
Author(s):  
D. Sivaprahasam ◽  
S. B. Chandrasekhar ◽  
K. Murugan ◽  
K. V. P. Prabhakar
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
Steel Powder ◽  
Microstructure And Mechanical Properties ◽  
High Temperature Gas

The Influence of Sintering Atmosphere for Metal Injection Moulding M2 High Speed Steel

2014 ◽  
Vol 879 ◽  
pp. 169-174
Author(s):  
R. Sauti ◽  
N.A. Wahab ◽  
M.A. Omar ◽  
I.N. Ahmad
Keyword(s):  
Mechanical Properties ◽  
Injection Moulding ◽  
High Speed ◽  
High Speed Steel ◽  
Steel Powder ◽  
Sintering Atmosphere ◽  
Temperature Range ◽  
Waste Rubber ◽  
Vacuum Atmosphere ◽  
M2 High Speed Steel

This paper reports on the compatibility of waste rubber as binder for M2 High Speed Steel injection moulding. The feedstock was prepared at a powder loading of 65 vol.% using 22μm M2 High Speed Steel powder and the binders consisting of 55wt.% paraffin wax, 21wt.% polyethylene, 14wt.% waste rubber and 10wt.% stearic acid. The specimens were then sintered in vacuum and 95%N2/5%H2 atmosphere. The sintering in vacuum atmosphere occurred within a temperature range from1200°C to 1260°C, whilst the 95%N2/5%H2 atmosphere was carried out within a temperature range from 1220°C to 1300°C. The effects of the sintering atmosphere and temperature on the physical properties, mechanical properties and microstructure were investigated.

Microstructure and High Temperature Mechanical Properties of Inconel 617

2007 ◽  
Vol 544-545 ◽  
pp. 411-414 ◽  
Author(s):  
Tae Sun Jo ◽  
Gil Su Kim ◽  
Young Ik Seo ◽  
Woo Seog Ryu ◽  
Young Do Kim
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Oxide Layer ◽  
Tube Material ◽  
Internal Oxide ◽  
High Temperature Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Inconel 617 ◽  
Second Phases ◽  
High Temperature Gas

Inconel 617 is a candidate tube material for high temperature gas-cooled reactors (HTGR). The microstructure and mechanical properties of Inconel 617 were studied after exposure at high temperature of 1050oC. The dominant oxide layer was Cr-oxide. The internal oxide and Crdepleted region were observed below the Cr-oxide layer. The major second phases are M23C6 and M6C types of carbides. The composition of M23C6 and M6C were determined to be Cr21Mo2C6 and Mo3Cr2(Ni,Co)1C, respectively, by EDS. These carbides are coarsened during exposure. M6C carbide is more stable than M23C6 at high temperature. There was not much change in mechanical properties after exposure at 1050oC for 1000 h.

Effect of Electromagnetic Stirring on the Microstructure and Mechanical Properties of the High Speed Steel

2012 ◽  
Vol 724 ◽  
pp. 291-294 ◽  
Author(s):  
Cong Rong Zhang ◽  
Xu Ding Song ◽  
Jun Yang ◽  
Jie Dong
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Electromagnetic Stirring ◽  
Microstructure Refinement ◽  
Comprehensive Properties ◽  
Microstructure And Mechanical Properties

In order to improve the microstructure and mechanical properties of High Speed Steel (HSS), electromagnetic stirring method is adopted to enhance the solidification of target materials in this paper. The results show that optimization of the microstructure, refinement of the grain, reducing in segregation of the alloy elements, and improvement of the comprehensive properties of HSS can be obtained by the electromagnetic stirring through changing the morphology and distribution of the carbide.

Microstructure and Mechanical Properties of Spray Deposited W9Mo3Cr4V High Speed Steel

2011 ◽  
Vol 391-392 ◽  
pp. 714-718
Author(s):  
Rui Zhou ◽  
Jian Fei Sun ◽  
Ying Jun Yang
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
High Speed ◽  
Bending Strength ◽  
Spray Deposition ◽  
High Speed Steel ◽  
Solidification Shrinkage ◽  
Microstructure And Mechanical Properties ◽  
The Matrix ◽  
The Impact

Microstructure and mechanical properties of W9Mo3Cr4V high speed steel fabricated by spray deposition have been studied. Spray deposited W9Mo3Cr4V high speed steel has a typical equiaxed structure which is finer and more homogeneous with a grain size of 20-30 micrometer compared with conventional casted counterparts. There are pores in the matrix of the deposited steel, which involve gas porosity, filling porosity and solidification shrinkage. As-deposited high speed steel is mainly composed of martensite, austenite and carbides which comprise MC carbide and M6C carbide. Mechanical properties show that the hardness and bending strength of the as-deposited steel are higher than that of the conventionally casted ones. However, impact toughness of the high speed steel is lower than that of the conventionally casted steel, which can be attributed to the existence of porosities and M6C carbides which reduce the impact toughness of high speed steels.

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