Three-dimensional wear parameters and wear mechanisms in turning hardened steels with PCBN tools

Wear ◽  
2018 ◽  
Vol 398-399 ◽  
pp. 69-78 ◽  
Author(s):  
Denis Boing ◽  
Rolf Bertrand Schroeter ◽  
Adilson José de Oliveira
Keyword(s):  
Wear Mechanisms ◽  
Three Dimensional ◽  
Hardened Steels ◽  
Pcbn Tools

Wear Mechanisms Approach to Ni-P Electroless Plating Applied to Hardening Engine Cylinder

2011 ◽  
Vol 189-193 ◽  
pp. 1918-1921
Author(s):  
Jianmin Sun ◽  
Qing Mei Yang
Keyword(s):  
Wear Resistance ◽  
Electroless Plating ◽  
Wear Mechanisms ◽  
Three Dimensional ◽  
Combination Method ◽  
Cylinder Wall ◽  
Hardening Material ◽  
Operation Conditions ◽  
Engine Cylinder ◽  
Piston Speed

For practical operation conditions of engine cylinder, piston speed and lateral pressure to cylinder wall are determined as experimental factors. According to load and speed on 1mm~8mm below top dead center of cylinder in expansion stroke, the ranges of experimental parameters are chosen. Based on the quadratic regression rotation combination method, wear resistance experiment of hardening material is designed. The wear mathematic models of Ni-P electroless plating is established, and three-dimensional curved surfaces for load-speed-wearing value are drawn. The results show that the Ni-P electroless plating can increase relative wear resistance of cylinder by 5 times. By analysis of wear mechanisms of hardening material and wear resistance, the material is perfect for hardening engine cylinder wall.

The impact of the retained austenite in the case-hardened steels on the crater wear formation of the PcBN tools

Wear ◽  
2021 ◽  
pp. 203691
Author(s):  
Denis Boing ◽  
Anna Ganea ◽  
Ulrika Brohede ◽  
Emil Stålnacke ◽  
Susanne Norgren
Keyword(s):  
Retained Austenite ◽  
Crater Wear ◽  
Hardened Steels ◽  
The Impact ◽  
Pcbn Tools

Effects of inert gas environment on the sliding wear behavior of AZ91/B4C surface composites

2021 ◽  
pp. 135065012110047
Author(s):  
Hemendra Patle ◽  
B. Ratna Sunil ◽  
S. Anand Kumar ◽  
Ravikumar Dumpala
Keyword(s):  
Wear Mechanisms ◽  
Wear Behavior ◽  
Normal Load ◽  
Three Dimensional ◽  
Material Loss ◽  
Delamination Wear ◽  
Surface Composites ◽  
Adhesion Wear ◽  
Constant Normal Load ◽  
Worn Surface

Tribological characteristics of AZ91/B4C surface composites were studied under air and argon gas environments. Tests were conducted under a constant normal load of 10 N, with a sliding velocity of 0.06 m/s using a linear reciprocating tribometer. Wear tracks and debris were analyzed using scanning electron microscopy, three-dimensional contour topography, and energy-dispersive X-ray spectroscopy in order to understand the wear mechanisms. The wear rate of the specimen tested under the argon environment was found to be lower (∼60%) in comparison with that of the specimen tested under the open-air environment. The value of the friction coefficient was found to be minimum under the argon environment compared with the air environment. In the air environment, the major material loss from the test specimen was attributed to oxidation wear; whereas under the argon environment, strain-hardening effect was dominant, and the material was found to be removed by delamination wear. In addition, the worn surface morphology of the wear tracks and counter surfaces showed the involvement of abrasion and adhesion wear mechanisms. The results of the study pave the pathway for the design of lightweight surface composite material systems such as AZ91/B4C toward an efficient and robust tribo-pair applicability for a controlled environment.

Wear Mechanisms of Hard-Brittle Material Tools in High-Speed Machining of Powder Metallurgy Material

2016 ◽  
Vol 693 ◽  
pp. 1200-1206
Author(s):  
Zhi Ding ◽  
Jiang Han ◽  
Hai Dong Yang
Keyword(s):  
Powder Metallurgy ◽  
Tool Wear ◽  
Wear Mechanisms ◽  
High Speed ◽  
Main Tool ◽  
Element Distribution ◽  
High Speed Machining ◽  
Powder Metallurgy Material ◽  
Tools Wear ◽  
Pcbn Tools

A series of experiments was conducted in high speed machining of powder metallurgy material with PCBN tools. The main tool wear mechanisms were discussed by observing tool wear morphology utilizing scanning electron microscopy (SEM) and detecting the element distribution of the worn tool surface using energy dispersive spectroscopy (EDS).The experimental results indicate that fragile breakage occurred before it reached its blunt standard in high-speed machining of powder metallurgy material with PCBN tools,and the tools wear mechanisms are synergistic interaction among mechanical wear,binder wear and chemical wear.

Wear Behaviors of PCBN Tools in Interrupted Turning Hardened Steel with Tool’s Chamfer Angle and Edge Preparation Considered

2014 ◽  
Vol 665 ◽  
pp. 3-10
Author(s):  
Yong Li ◽  
Zi Li Kou ◽  
Shen Zhuo Liu ◽  
Rui Zhang ◽  
Ping Ping Liu ◽  
...  
Keyword(s):  
Wear Mechanisms ◽  
Cubic Boron Nitride ◽  
Impact Resistance ◽  
Test Method ◽  
Thermal Wear ◽  
Interrupted Turning ◽  
The Impact ◽  
Edge Preparation ◽  
Pcbn Tools ◽  
Cutting Speeds

The performance and wear mechanisms of one type of polycrystalline cubic boron nitride (PCBN) cutting tool with two different cutting edge micro geometries (marked as PCBN 169T and PCBN 169S) have been investigated in this paper. Interrupted turning of round GCr15 steel has been selected as the test method. The experimental results indicate that PCBN 169S has a greater thermal wear resistance than PCBN 169T at high cutting speeds. It is believed that edge preparation can shorten or eliminate the initiative wearing stage, improve the impact resistance, reduce the occurrence of chipping or dilapidation, and extend tool life. Scanning electron microscopy (SEM) were used to evaluate wear mechanisms of PCBN tools. Our results show that the dominant wear mechanisms for PCBN 169T and PCBN 169S are mechanical and chemical wear.

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