scholarly journals Comparison of properties of cutting edges made of HSS obtained by conventional methods and in powder metallurgy process

Mechanik ◽  
2017 ◽  
Vol 90 (10) ◽  
pp. 826-828
Author(s):  
Maciej Jan Kupczyk ◽  
Jędrzej Komolka
Keyword(s):  
Powder Metallurgy ◽  
Chemical Composition ◽  
Functional Properties ◽  
High Speed ◽  
High Speed Steel ◽  
Similar Chemical Composition ◽  
Powder Metallurgy Process ◽  
Similar Chemical ◽  
Conventional Methods ◽  
Metallurgy Process

Selected fragments of investigations of technological and functional properties of cutting edges made of conventional and sintered high speed steel with similar chemical composition are presented. Investigations of technological and functional properties have comparative character and concern among other things estimation of chemical composition, hardness, structure and durability during toughening steel machining.

BÖHLER S393 MICROCLEAN

Alloy Digest ◽  
2018 ◽  
Vol 67 (7) ◽  
Keyword(s):  
Powder Metallurgy ◽  
Physical Properties ◽  
High Speed ◽  
High Performance ◽  
High Speed Steel ◽  
Heat Treating ◽  
Powder Metal ◽  
Powder Metallurgy Process ◽  
Red Hardness ◽  
Metallurgy Process

Abstract Böhler (or Boehler) S393 is a high-speed steel made by the powder metallurgy process with excellent toughness and red hardness. This datasheet provides information on composition, physical properties, and hardness. It also includes information on surface qualities as well as forming, heat treating, machining, and powder metal forms. Filing Code: TS-751. Producer or source: Voestalpine High Performance Metals Corporation.

Development of Powder Metallurgy High Speed Steel

2010 ◽  
Vol 638-642 ◽  
pp. 1854-1859 ◽  
Author(s):  
Hai Lin Zhong ◽  
Y. Fang ◽  
C. Kuang ◽  
X. Kuang ◽  
Q. Hao ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
High Speed ◽  
Nonmetallic Inclusions ◽  
Hot Isostatic Pressing ◽  
High Speed Steel ◽  
Gas Atomization ◽  
Treatment Processes ◽  
Uniform Microstructure ◽  
Powder Metallurgy Process ◽  
Metallurgy Process

High speed steels (HSS) have been widely used worldwide. This paper introduced some research results of high speed steels via Powder Metallurgy process. High speed steels AHPT15 (W12Cr4V5Co5 ) were investigated via gas atomization, hot isostatic pressing, hot working and heat treatment processes. Microstructure of the steels, precipitation of carbides and the influence of nonmetallic inclusions on mechanical properties of the steels were investigated. PM HSS showed fine and uniform microstructure and exhibited excellent toughness and wear resistance, with bend strength up to 3500 MPa and hardness up to 68.0 HRC.

Study on Friction Properties of Cu-Fe-Based Powder Metallurgy Materials under Dry and Wet Friction Conditions

2010 ◽  
Vol 150-151 ◽  
pp. 1806-1809 ◽  
Author(s):  
Rong Fu ◽  
Fei Gao ◽  
Bao Yun Song
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
High Speed ◽  
Wear Behavior ◽  
Water Film ◽  
Powder Metallurgy Process ◽  
Wet Friction ◽  
Friction Pressure ◽  
Pressure Changes ◽  
Metallurgy Process

Copper-iron-based friction materials were prepared by powder metallurgy process. The effects of friction velocity and friction pressure on friction and wear behavior of the material under dry and wet friction conditions were investigated with a constant-speed friction machine. The results show that, at low speed friction, the dry friction coefficient is higher than wet friction coefficient and the friction coefficient increases with increasing friction pressure. The reason is that the water film plays an important role in cleaning and lubricating. At high speed friction, there is not much difference between dry and wet friction coefficients and the friction coefficient is not sensitive to friction pressure changes. This is due to the metal matrix high-temperature softening, caused by high speed friction, which controls the friction properties.

Grain Size of Commercial High Speed Steel

2006 ◽  
Vol 530-531 ◽  
pp. 16-21 ◽  
Author(s):  
Rejane A. Nogueira ◽  
Oscar O. Araújo Filho ◽  
Leonardo F.M. Souza ◽  
João Franklin Liberati ◽  
Lucio Salgado ◽  
...  
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
High Speed ◽  
High Speed Steel ◽  
Matrix Composition ◽  
Quenching Temperature ◽  
Austenite Grain Size ◽  
Powder Metallurgy Process ◽  
Hardening Treatment ◽  
Metallurgy Process

The heat treatment of high speed steel tools consists of austenitizing, quenching and tempering. The size of austenite grains formed during the hardening treatment is an important factor in the final microstructure of the steel, and it also affects properties such as wear resistance and toughness. This paper presents the austenite grain size, matrix composition and hardness of commercial AISI M2, AISI T15, VWM3C and Sinter 23 high speed steels that were austenitized and quenched from five distinct temperatures. This study shows that increase in quenching temperature results in grain growth of steels such as AISI M2 and VWM3C, obtained by the conventional method (cast to ingot and worked). The P/M Sinter 23 high speed steel showed a slight grain growth (about 10%). This effect was not observed in AISI T15 obtained by the powder metallurgy process.

ASP 23

Alloy Digest ◽  
1991 ◽  
Vol 40 (3) ◽  
Keyword(s):  
Powder Metallurgy ◽  
Physical Properties ◽  
Tool Steel ◽  
High Speed ◽  
Heat Treating ◽  
Bend Strength ◽  
Powder Metallurgy Process ◽  
Metallurgy Process

Abstract ASP 23 is a high-speed tool steel manufactured by the ASP powder metallurgy process in which the steel is atomized, compacted, and hot formed to the desired dimensions. This datasheet provides information on composition, physical properties, hardness, elasticity, and bend strength. It also includes information on heat treating, machining, and joining. Filing Code: TS-503. Producer or source: Uddeholm Corporation.

scholarly journals The Structure and Composition of Rat Reticulocytes

Blood ◽  
1962 ◽  
Vol 20 (5) ◽  
pp. 547-556 ◽  
Author(s):  
T. HALLINAN ◽  
E. EDEN ◽  
R. NORTH
Keyword(s):  
Endoplasmic Reticulum ◽  
Chemical Composition ◽  
Mammalian Cells ◽  
High Speed ◽  
Similar Chemical Composition ◽  
Whole Cells ◽  
Outer Membranes ◽  
Similar Chemical ◽  
Mammalian Tissues ◽  
Rat Reticulocytes

Abstract 1. Fixed, sectioned rat reticulocytes, embedded in araldite, have a regular outer limiting margin like that of erythrocytes; however, unlike erythrocytes they contain cytoplasmic organelles similar to those in erythroblasts and other mammalian cells. These include mitochondria, ribosomes and a sparse endoplasmic reticulum consisting of rounded vesicles and occasional small cisternae. The endoplasmic reticulum appears to consist wholly of "rough-surfaced" elements. 2. Many mitochondria have disorientated cristae or ruptured outer membranes. The possible origin of these alterations is discussed. 3. Ribosomes appear as electron-opaque granules 10-20 mµ in diameter in sections of whole cells. Most of them occur free in the cytoplasm while a few appear to be attached to the surface of vesicles and cisternae of the endoplasmic reticulum. They can be isolated from ruptured cells by high speed centrifugation and have a similar chemical composition to ribosomes from other mammalian tissues.

CARPENTER MICRO-MELT T-15 ALLOY

Alloy Digest ◽  
1997 ◽  
Vol 46 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Powder Metallurgy ◽  
Machine Tools ◽  
High Speed ◽  
Heat Treating ◽  
High Carbon ◽  
Powder Metallurgy Process ◽  
Red Hardness ◽  
Metallurgy Process

Abstract Carpenter Micro-Melt T-15 Alloy is a high-speed tool steel made by the powder metallurgy process. The alloy is high carbon with tungsten, cobalt, and vanadium for red hardness and excellent abrasion resistance. Applications include machine tools and cutters. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on wear resistance as well as forming and heat treating. Filing Code: TS-549. Producer or source: Carpenter.

Secondary Hardening of an AISI M3:2 High Speed Steel Sinter 23 Hot Isostatic Pressed

2017 ◽  
Vol 899 ◽  
pp. 361-365
Author(s):  
Oscar Olimpio de Araújo Filho ◽  
Cezar Henrique Gonzalez ◽  
Severino Leopoldino Urtiga Filho ◽  
C.A.N. Oliveira ◽  
Noelle D’emery Gomes Silva ◽  
...  
Keyword(s):  
Heat Treatment ◽  
High Speed ◽  
Hot Isostatic Pressing ◽  
High Speed Steel ◽  
Secondary Hardening ◽  
Tempering Temperature ◽  
Hardness Tests ◽  
Powder Metallurgy Process ◽  
Secondary Hardness ◽  
Metallurgy Process

The main aim of this work was to study the behavior of the secondary hardening of AISI M3:2 high speed steel named Sinter 23® produced by powder metallurgy process of hot isostatic pressing (HIP). The M3:2 high speed steel Sinter 23® was submitted to heat treatment of hardening with austenitizing temperatures of 1140 oC, 1160 oC, 1180 oC and 1200 oC and tempering at 540 oC, 560 oC and finally 580 oC. The effectiveness and response of the heat treatment was determined using hardness tests (Vickers and Rockwell C hardness) and had its property of secondary hardness evaluated. The results showed that the secondary hardening peak of Sinter 23® high speed steel (tempering temperature at which maximum hardness is attained) is at 540 °C for the lower austenitization temperatures of 1140 °C and 1160 °C, and it is at 560 °C for the higher austenitizing/quenching temperatures of 1180 °C and 1200°C.

LESCO M-4 PM

Alloy Digest ◽  
1990 ◽  
Vol 39 (5) ◽  
Keyword(s):  
Wear Resistance ◽  
Powder Metallurgy ◽  
Physical Properties ◽  
Tool Steel ◽  
High Speed ◽  
Heat Treating ◽  
Vanadium Content ◽  
Steel Company ◽  
Powder Metallurgy Process ◽  
Metallurgy Process

Abstract LESCO M-4 PM high-speed tool steel is a special purpose grade of the molybdenum-tungsten family. Abrasion and wear resistance are enhanced by the increased carbon and vanadium content. It is produced by the powder metallurgy process with resultant better grindability, toughness and improved microstructure as compared with conventional wrought M-4 steel. Sulfide additives enhance machinability. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-500. Producer or source: Latrobe Steel Company.

Sign in / Sign up

Export Citation Format

Share Document