The Modelling of Crater Wear in Cutting with TiN Coated High Speed Steel Tool

2015 ◽  
Vol 812 ◽  
pp. 227-232
Author(s):  
Zoltán Pálmai
Keyword(s):  
High Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
Protective Layer ◽  
Flow Zone ◽  
Tin Coating ◽  
Crater Wear ◽  
Thermally Activated ◽  
Autonomous Equation ◽  
Cutting Experiments

The flow zone of the chip in contact with the tool reaches a high temperature in cutting. According to chip hardening experiments α-γ transformation may occur in steel, so the tool is in contact with a high-temperature γ phase at high pressure. The microscopic examination of worn surfaces showed that the degradation of the tool is the result of adhesive/abrasive and thermally activated processes, therefore both friction length and temperature must be taken into consideration in the modelling of crater wear. Wear rate can be described by a non-linear autonomous equation. TiN coating, which increases tool life in high speed steel, changes and slows down the wear of the tool. The activation energy of wear can be calculated from the constants of the wear equation determined by cutting experiments. The deoxidation products to be found in the workpiece in cutting may form a protective layer on the TiN layer that blocks or slows down wear.

CRUCIBLE CPM REX 121

Alloy Digest ◽  
2001 ◽  
Vol 50 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
High Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
Heat Treating ◽  
Maximum Hardness ◽  
Temperature Performance ◽  
Red Hardness ◽  
Cutting Speeds

Abstract CPM Rex 121 is a super high-speed steel with significantly higher wear resistance and red hardness than other high-speed steels. It is best suited for applications requiring high cutting speeds. It may provide an alternative to carbide where carbide cutting edges are too fragile. The annealed hardness is approximately 350-400 HB, and maximum hardness is approximately 72 HRC. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity as well as fracture toughness. It also includes information on high temperature performance and wear resistance as well as heat treating and surface treatment. Filing Code: TS-591. Producer or source: Crucible.

Microstructures and high temperature properties of spray formed niobium-containing M3 high speed steel

2014 ◽  
Vol 45 (8) ◽  
pp. 689-698 ◽  
Author(s):  
H. B. Wang ◽  
L. G. Hou ◽  
J. X. Zhang ◽  
L. Lu ◽  
H. Cui ◽  
...  
Keyword(s):  
High Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
High Temperature Properties

Investigation on Wear Behavior at High Temperature of Smooth and Bionic Non-Smooth Samples

2012 ◽  
Vol 157-158 ◽  
pp. 1628-1631
Author(s):  
Xiao Dong Yang ◽  
Zhuo Juan Yang ◽  
You Quan Chen
Keyword(s):  
High Temperature ◽  
Wear Mechanism ◽  
High Speed ◽  
Room Temperature ◽  
Wear Behavior ◽  
High Speed Steel ◽  
Wear Test ◽  
Test Method ◽  
Wear Characteristics ◽  
Pin On Disk

By using pin-on-disk wear test method, the wear behavior of W9Gr4V high speed steel with smooth and non-smooth concave samples which treated by laser texturing technology was investigated between room temperature and 500 . It was found that the anti-wear ability of the non-smooth concave samples was increased more than that of the smooth ones and the anti-wear ability of the non-smooth samples was evident than the smooth ones at temperature increasing. In this paper, the anti-wear mechanism of non-smooth concave samples and wear characteristics with smooth and non-smooth samples in high-temperature were analyzed.

scholarly journals High-temperature Fatigue Property of a W–Mo Type High-speed Steel

2009 ◽  
Vol 95 (9) ◽  
pp. 655-659
Author(s):  
Tadashi Terazawa ◽  
Tomoyuki Hasegawa ◽  
Takashi Mitani ◽  
Chihiro Watanabe ◽  
Ryoichi Monzen
Keyword(s):  
High Temperature ◽  
High Speed ◽  
High Speed Steel ◽  
Fatigue Property ◽  
High Temperature Fatigue

Influence of Tin Coating on Wear of High Speed Steel Tools as Studied by New Laboratory Wear Test

1989 ◽  
Vol 5 (2) ◽  
pp. 141-150 ◽  
Author(s):  
P. Hedenqvist ◽  
M. Olsson ◽  
S. Söderberg
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Wear Test ◽  
Tin Coating

Microstructure and Corrosion Resistance of TiN Coating on HSS by Pulsed Bias Cathodic Arc Ion Plating

2011 ◽  
Vol 675-677 ◽  
pp. 1307-1310 ◽  
Author(s):  
Xiao Hong Yao ◽  
Bin Tang ◽  
Lin Hai Tian ◽  
Xiao Fang Li ◽  
Yong Ma
Keyword(s):  
Corrosion Resistance ◽  
High Speed ◽  
High Speed Steel ◽  
Corrosion Current ◽  
Scratch Test ◽  
Grain Structure ◽  
Tin Coating ◽  
Arc Ion Plating ◽  
Ion Plating ◽  
Cathodic Arc

TiN coating with thickness of 2.5μm was deposited on high-speed steel (HSS) substrate by pulsed bias cathodic arc ion plating. The surface and cross-section morphologies, composition depth profile and phase structure were characterized by FESEM, GDOES and XRD, respectively. Scratch test for adhesion evaluation, microhardness test for hardness measurement, and potentiodynamic polarization for corrosion resistance test were used. The results show that the TiN coating exhibits smooth surface, dense columnar grain structure and an obviously preferred orientation of TiN(111). The adhesion of the coating to substrate is exceeded more than 100N. The hardness of the coating is about 26 GPa. The low corrosion current density (Icorr) and rather high corrosion potential (Ecorr) value imply that the TiN coating displays a good corrosion resistance in 0.5mol/l NaCl solution. However, pitting is still existed due to the defects in the coating.

EFFECT OF BORON CONTENT ON HIGH-TEMPERATURE OXIDATION RESISTANCE OF B-BEARING HIGH-SPEED STEEL

2020 ◽  
Vol 27 (12) ◽  
pp. 2050023
Author(s):  
YINGHUA LIN ◽  
HUI LI ◽  
JIANG JU ◽  
CHANGCHUN JIANG ◽  
YONGPING LEI ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxide Film ◽  
Oxidation Resistance ◽  
Retained Austenite ◽  
High Speed ◽  
Boron Content ◽  
Unit Area ◽  
High Speed Steel ◽  
Mass Gain ◽  
Temperature Oxidation

The oxidation behavior of B-bearing high-speed steel was studied at 923[Formula: see text]K. The results showed that the as-cast microstructure of 1.0 wt.%B high-speed steel was composed of pearlite + ferrite + M7(C, B)3 + M2(B, C). When the boron content increased, the microstructure gradually changed into martensite + retained austenite + netlike M2(B, C) + M[Formula: see text](C, B)6 + M7(C, B)3. The cyclic oxidation of B-bearing high-speed steel at K followed parabolic rule. The unit area mass gain of 1 wt.%B high-speed steel was 4.2 g/m2 after 923 K/250 h oxidation, and the unit area mass gain of 3 wt.%B high-speed steel was only 3.5 g/m2. The oxidation of boron element formed B2O3, which was mainly enriched at the interface of the oxide film/matrix. B2O3 flowed in the oxide film at high temperature and was easy to fill the defect. B2O3 was easy to form B2O3-SiO2 borosilicate with SiO2. The more boron content was, the more favorable it was to form B2O3-SiO2 borosilicate oxide layer rich in B2O3 and the more favorable it was to spread in the oxide film, so that the oxidation resistance of B-bearing high-speed steel could be remarkably improved.

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