Effect of heat treatment on friction and wear behavior of Ni-based thermal spray coating deposited on Z200C12 steel

C. C. Berndt advanced investigations of mechanical properties of thermal spray coatings under 4-point bending. He found that this investigation method is sensitive to the mechanical properties of thermal spray coatings.This paper contains the detailed investigation results for thermal spray coatings of zirconium dioxide under 4-point bending, i.e. tests of the specimens subjected to spraying at varying conditions and pre-test soaking with the various duration at 1100 °С.It was established how the mechanical properties of thermal spray coatings changed depending on the spraying mode and high temperature soaking. The test results show that the double heat treatment of coatings is more preferable than one-time heat treatment as it make the properties change linearly. It is more easily controllable during operation of the components with thermal spray coating.

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Wear Behavior of Flat and Graded Profile Boron-Implanted Beryllium

MRS Proceedings ◽

10.1557/proc-27-649 ◽

1983 ◽

Vol 27 ◽

Author(s):

K. Kumar ◽

H. Newborn ◽

R. Kant

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Electron Spectroscopy ◽

Auger Electron ◽

Friction And Wear ◽

Boron Concentration ◽

Wear Behavior ◽

Friction And Wear Behavior ◽

Flat Profile ◽

Pin On Disk

ABSTRACTPin-on-disk tests were performed for comparative friction and wear behavior on flat and graded profile boron implanted beryllium samples. Peak, intended boron concentrations of 10, 20, 30 and 40 atom percent were investigated. Auger Electron Spectroscopy was used to determine the boron concentration as a function of depth. Preliminary work was performed to study the effects of (1) a low temperature (450°C, 1–1/2 hours) heat treatment of the implanted specimens and (2) a change in the pin material. All of the boron implanted beryllium samples showed significant improvement versus unimplanted beryllium and an anodized beryllium surface. Graded samples showed comparable friction coefficients but inferior wear resistance with respect to the flat profile samples.

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Nanostructuring Behavior of NiCrBSi and CoCrWC Thermal Spray Coatings Formed by Temperature-Controlled Laser Heat Treatment

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2020.58.4.247 ◽

2020 ◽

Vol 58 (4) ◽

pp. 247-256 ◽

Cited By ~ 1

Author(s):

Eun-Joon Chun

Keyword(s):

Heat Treatment ◽

Thermal Spray ◽

Spray Coating ◽

Thermal Spray Coating ◽

Laser Heat Treatment ◽

Real Time Control ◽

Continuous Casting Mold ◽

Time Control ◽

Laser Heat ◽

Heat Treated

.For surface hardening of a continuous casting mold component, a thermal spray coating of NiCrBSi (Metco-16C) and CoCrWC (Stellite-1) was performed followed by laser heat treatment of the coatings. To support selective modification of the thermal spray coating, a metallurgically determined surface temperature was maintained during the laser heat treatment, by real-time control of the laser power. In other words, nonhomogeneities in the macrosegregation of certain alloying elements, and voids in the as-sprayed state, could be improved. The main microstructural features of the Metco-16C coating laser-heat-treated at 1423 K were nanosized (100–150 nm) Cr5B3, M7C3, and M23C6 precipitates with a lamellar structure of Ni (FCC) and Ni3Si as the matrix phase. Those of the laser heat-treated Stellite- 1 coating at 1473 K were fine (30–250 nm) precipitates of WC, M7C3, and M23C6 based on a Co (FCC) matrix. The results show that laser heat treatment at 1423 K increased the hardness of the Mecto-16C coating to 1115 HV from the as-sprayed state (754 HV), while treatment at 1473 K increased the hardness of the Stellite-1 coating from 680 HV to 860 HV.

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Wear Behavior of a Borided Nickel-Based Self-Fluxing Thermal Spray Coating

Materials Performance and Characterization ◽

10.1520/mpc20150064 ◽

2016 ◽

Vol 5 (4) ◽

pp. MPC20150064

Author(s):

F. E. Mariani ◽

G. C. Rêgo ◽

A. L. Neto ◽

G. E. Totten ◽

L. C. Casteletti

Keyword(s):

Thermal Spray ◽

Wear Behavior ◽

Spray Coating ◽

Thermal Spray Coating

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HIGH-TEMPERATURE FRICTION AND WEAR BEHAVIOR OF A NI-BASED VALVE ALLOY

Surface Review and Letters ◽

10.1142/s0218625x19500744 ◽

2019 ◽

Vol 26 (10) ◽

pp. 1950074

Author(s):

ZHI-YUAN ZHU ◽

JIA-HUAN CHEN ◽

YUAN-FEI CAI ◽

JIAN-QIANG LI

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

High Temperature ◽

Wear Rate ◽

Friction And Wear ◽

Room Temperature ◽

Wear Behavior ◽

Friction And Wear Behavior ◽

Nickel Based Superalloy ◽

Heat Treated

This study explored the friction and wear behavior of a Ni-based exhaust valve at high temperatures. Nickel-based superalloy was used with two types of processing states: the original forged sample and the sample under the standard T1 heat treatment. At room temperature and a loading force of 10[Formula: see text]N, the average friction coefficient of the T1 heat-treated specimen is 0.61, which was lower than that of the forged sample (0.78). The wear rate of this specimen was also lower than that of the forged sample at the same temperature and loading force. Thus, T1 heat treatment can significantly improve the wear resistance of the alloy because of [Formula: see text] phase and carbides. The wear rate was the minimum at 550∘C and increased again at 750∘C dominated by the formation and flake-off of the oxide film.

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