Microstructure and Properties of 40CrNiMoA Steel Surface After Laser Quenching

2020 ◽  
Vol 57 (1) ◽  
pp. 011405
Author(s):  
杨振 Yang Zhen ◽  
樊湘芳 Fan Xiangfang ◽  
邱长军 Qiu Changjun ◽  
李勇 Li Yong ◽  
柳宁 Liu Ning
Keyword(s):  
Steel Surface ◽  
Microstructure And Properties ◽  
Laser Quenching

scholarly journals Microstructure and properties of Cr12MoV die steel by laser quenching with different power

2019 ◽  
Vol 631 ◽  
pp. 022032
Author(s):  
Liu Yu ◽  
Tian Yuanpeng ◽  
Zhang Hui ◽  
Zhang Haijing ◽  
Li Yang
Keyword(s):  
Die Steel ◽  
Microstructure And Properties ◽  
Laser Quenching

scholarly journals Silicon carbide particulates incorporated into microalloyed steel surface using TIG: microstructure and properties

2019 ◽  
Vol 36 (1) ◽  
pp. 17-32 ◽  
Author(s):  
P. Muñoz-Escalona ◽  
F. Sillars ◽  
T. Marrocco ◽  
R. Edgar ◽  
S. Mridha ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Steel Surface ◽  
Microalloyed Steel ◽  
Microstructure And Properties

Microstructure and Properties of 35CrMoA Steel in Laser Quenching-Nitriding

2010 ◽  
Vol 37 (1) ◽  
pp. 250-255
Author(s):  
程义远 Cheng Yiyuan ◽  
王勇 Wang Yong ◽  
韩彬 Han Bin ◽  
李美艳 Li Meiyan
Keyword(s):  
Microstructure And Properties ◽  
Laser Quenching

Study on the Microstructure and Properties of Laser Remelted Ceramic Coatings on Low Carbon Steel Surface

2012 ◽  
Vol 591-593 ◽  
pp. 917-921
Author(s):  
Xin Jiang ◽  
Fu Qing Zhang ◽  
Yu Jie Jin ◽  
Xing Tian Qu ◽  
Zhi Ping Wang
Keyword(s):  
Plasma Spraying ◽  
Bonding Strength ◽  
Steel Surface ◽  
Low Carbon Steel ◽  
Wear Test ◽  
Ceramic Coatings ◽  
Low Carbon ◽  
Laser Remelting ◽  
Microstructure And Properties ◽  
Α Al2o3

The plasma spraying Al2O3-13%TiO2 (abbreviated as AT-13) ceramic coatings on Q235B steel surface were dealed with laser remelting technique. The microstructure and properties before and after laser remelting were studied. Experiment results shown that the microstructure of laser remelted ceramic coatings was dense, no porosity appeared. The main compositions of laser remelted ceramic coatings were α-Al2O3 and a small amount of TiO2 and TiAl2O5. Microhardness of AT-13 plasma spraying coatings and laser remelting coatings were measured with vickers, and the maximum microhardness value of the former was 1000 HV0.2 , while that of the latter was 1700 HV0.2; The average bonding strength value of AT-13 plasma spraying coating was 24.36 Mpa, while the average bonding strength value of laser remelting coating was more than 67.02 Mpa. The wear resistance of laser remelting coatings was higher than that of AT-13 plasma spraying coatings through the pin-dish particle wear test.

EELS characterization of “Smut” layer films on steel surface prepared for chrome plating by anodic etching

1995 ◽  
Vol 53 ◽  
pp. 538-539
Author(s):  
E Y. Wang ◽  
J. T. Cherian ◽  
A. Madsen ◽  
R. M. Fisher
Keyword(s):  
Steel Surface ◽  
Surface Preparation ◽  
Treatment Method ◽  
Chrome Plating ◽  
Transmission Electron ◽  
Alloy Steels ◽  
Pre Treatment ◽  
Hard Chrome ◽  
Electron Energy Loss

Many steel parts are electro-plated with chromium to protect them against corrosion and to improve their wear-resistance. Good adhesion of the chrome plate to the steel surface, which is essential for long term durability of the part, is extremely dependent on surface preparation prior to plating. Recently, McDonnell Douglas developed a new pre-treatment method for chrome plating in which the steel is anodically etched in a sulfuric acid and hydrofluoric acid solution. On carbon steel surfaces, this anodic pre-treatment produces a dark, loosely adhering material that is commonly called the “smut” layer. On stainless steels and nickel alloys, the surface is only darkened by the anodic pre-treatment and little residue is produced. Anodic pre-treatment prior to hard chrome plating results in much better adherence to both carbon and alloy steels.We have characterized the anodic pre-treated steel surface and the resulting “smut” layer using various techniques including electron spectroscopy for chemical analysis (ESCA) on bulk samples and transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS) on stripped films.

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