The Effects of Temperature and Time on Cu-Ce Infiltration Layer of 304 Stainless Steel by Double Glow Plasma Surface Metallurgy

2013 ◽  
Vol 675 ◽  
pp. 322-325
Author(s):  
Feng Tang ◽  
Jin Yong Xu ◽  
Yan Tang ◽  
Cheng Gao ◽  
Bo Gao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Heat Insulation ◽  
Surface Hardness ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Layer Depth ◽  
Plasma Surface ◽  
Effects Of Temperature ◽  
Glow Plasma ◽  
Depth Increase

The Cu-Ce infiltration layer was formed on 304 Stainless Steel surface by double glow plasma surface metallurgy technology. The effects of heat insulation temperature and heat insulation time on surface alloying concentration, surface hardness and infiltration layer depth were analyzed by comparative test. The results showed: In the experimental range, the contents of Cu and Ce, surface hardness, diffusion layer depth increase with the temperature and time increasing; the deposition layer depth increases with time increasing and decreases with temperature increasing in a certain range.

The Effects of Voltage on Cu-Ce Infiltration Layer of 304 Stainless Steel by Double Glow Plasma Surface Metallurgy

2012 ◽  
Vol 538-541 ◽  
pp. 298-301
Author(s):  
Feng Tang ◽  
Jin Yong Xu ◽  
Yan Tang ◽  
Cheng Gao ◽  
Peng Gao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Surface Hardness ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Layer Depth ◽  
Cathode Voltage ◽  
Plasma Surface ◽  
Source Voltage ◽  
Glow Plasma ◽  
Depth Increase

The Cu-Ce infiltration layer was formed on 304 Stainless Steel surface by double glow plasma surface metallurgy technology. The effects of source voltage and cathode voltage on surface alloying concentration, surface hardness and infiltration layer depth were analyzed by comparative test. The results showed: In the experimental range, the contents of Cu and Ce, surface hardness, deposition layer depth increase with the source voltage increasing, which is contrary to the cathode voltage; the diffusion layer depth increases with either voltage increasing in a certain range.

Research on Process of Copper-Infiltration on 304 Stainless Steel by Double Glow Plasma Technology

2012 ◽  
Vol 490-495 ◽  
pp. 3418-3422
Author(s):  
Yan Wang ◽  
Jin Yong Xu ◽  
Cheng Gao ◽  
Bo Gao
Keyword(s):  
Stainless Steel ◽  
Process Parameters ◽  
Diffusion Layer ◽  
Heat Insulation ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Layer Depth ◽  
Source Voltage ◽  
Glow Plasma ◽  
Infiltration Method

The effect on diffusion layer depth and copper content of the variation of various parameters in copper-infiltrated process on stainless steel surface by double glow plasma technology were researched. The process parameters contain Ar2 pressure, source voltage, heat insulation temperature and heat insulation time. The best process parameters are as follows: gas pressure:20Pa, source voltage:1000V, heat insulation temperature:950°C and heat insulation time:3h. Nowadays, the main methods of copper-infiltrated on stainless steel surface include: solid-infiltration method, paste-infiltration method, particle beam injection etc[1~4]. The strength of diffusion layer treated by the plasma metal infiltration technique is comparable to metallurgical bonding strength, and the process is low cost and less pollution.The paper systematically studied the plasma copper-infiltrated process on 304 Stainless Steel. The initial copper-infiltrated process parameters on 304 Stainless Steel were as follows[5]: Ar2 pressure: 20 Pa; source voltage: 1000 V; heat insulation temperature: 950°C; heat insulation time: 3 hours. The optimum seeking method is based on the initial process parameters, varying the value of one parameter each time. Four values of one parameter is a group contrasting experiments. Testing diffusion layer depth and copper content on surface of each experiment to be standerds of evaluation every value. The values of each parameter to be seleted were as follows: Ar2+ pressure: 10 Pa, 15 Pa, 20 Pa, 25 Pa; source voltage: 800V, 900V, 1000V, 1100V; heat insulation temperature: 800°C, 900°C, 950°C, 1000°C; heat insulation time: 2.5 h, 3 h, 3.5 h, 4 h.

scholarly journals Stainless Steel Surface Nitriding in Open Atmosphere Cold Plasma: Improved Mechanical, Corrosion and Wear Resistance Properties

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4836
Author(s):  
Alice O. Mateescu ◽  
Gheorghe Mateescu ◽  
Adriana Balan ◽  
Catalin Ceaus ◽  
Ioan Stamatin ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Surface Treatment ◽  
Coefficient Of Friction ◽  
Cold Plasma ◽  
Surface Hardness ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Open Atmosphere ◽  
Friction Regime

This work presents preliminary results regarding improving the mechanical, wear and protective properties (hardness, coefficient of friction, corrosion resistance) of AISI 304 stainless steel surfaces by open atmosphere cold plasma surface treatment method. Comparative evaluations of the morphological, corrosion resistance, mechanical and tribological properties for different periods of treatment (using N2 gas for cold plasma generation in an open atmosphere) were performed. AFM surface analyses have shown significant surface morphology modifications (average roughness, FWHM, surface skewness and kurtosis coefficient) of the treated samples. An improved corrosion resistance of the N2 treated surfaces in open atmosphere cold plasma could be observed using electrochemical corrosion tests. The mechanical tests have shown that the surface hardness (obtained by instrumented indentation) is higher for the 304 stainless steel samples than it is for the un-treated surface, and it decreases gradually for higher penetration depths. The kinetic coefficient of friction (obtained by ball-on-disk wear tests) is significantly lower for the treated samples and increases gradually to the value of the un-treated surface. The low friction regime length is dependent on the surface treatment period, with a longer cold plasma nitriding process leading to a significantly better wear behavior.

scholarly journals Chemical sanitizers to control biofilms formed by two Pseudomonas species on stainless steel surface

2012 ◽  
Vol 32 (1) ◽  
pp. 142-150 ◽  
Author(s):  
Danila Soares Caixeta ◽  
Thiago Henrique Scarpa ◽  
Danilo Florisvaldo Brugnera ◽  
Dieyckson Osvani Freire ◽  
Eduardo Alves ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Stainless Steel ◽  
Biofilm Formation ◽  
Skim Milk ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Aisi 304 ◽  
Pseudomonas Species ◽  
Sodium Dichloroisocyanurate ◽  
Different Temperatures

The biofilm formation of Pseudomonas aeruginosa and Pseudomonas fluorescens on AISI 304 stainless steel in the presence of reconstituted skim milk under different temperatures was conducted, and the potential of three chemical sanitizers in removing the mono-species biofilms formed was compared. Pseudomonas aeruginosa cultivated in skim milk at 28 °C presented better growth rate (10.4 log CFU.mL-1) when compared with 3.7 and 4.2 log CFU.mL-1 for P. aeruginosa and P. fluorescens cultivated at 7 °C, respectively. Pseudomonas aeruginosa formed biofilm when cultivated at 28 °C. However, only the adhesion of P. aeruginosa and P. fluorescens was observed when incubated at 7 °C. The sodium dichloroisocyanurate was the most efficient sanitizer in the reduction of the adhered P. aeruginosa cells at 7 and 28 °C and those on the biofilm, respectively. The hydrogen peroxide was more effective in the reduction of adhered cells of P. fluorescens at 7 °C.

scholarly journals Surface composition and near-surface hardness studies on high dose boron-implanted 304 stainless steel

1990 ◽  
Vol 13 (5) ◽  
pp. 333-342 ◽  
Author(s):  
A K Goel ◽  
N D Sharma ◽  
R K Mohindra ◽  
P K Ghosh ◽  
M C Bhatnagar
Keyword(s):  
Stainless Steel ◽  
Surface Composition ◽  
Surface Hardness ◽  
304 Stainless Steel ◽  
High Dose ◽  
Near Surface

DOUBLE GLOW PLASMA SURFACE TITANIZING ON AISI 316 STAINLESS STEEL WITH IMPROVED WEAR RESISTANCE: EFFECTS OF PROCESS PARAMETERS

2019 ◽  
Vol 27 (07) ◽  
pp. 1950178
Author(s):  
YONG MA ◽  
NAIMING LIN ◽  
QIANG LIU ◽  
JIAOJUAN ZOU ◽  
XIUZHOU LIN ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Wear Rate ◽  
Process Parameters ◽  
Coating Thickness ◽  
Optimal Process ◽  
Plasma Surface ◽  
Aisi 316 Stainless Steel ◽  
Aisi 316 ◽  
Glow Plasma

Using the double glow plasma surface alloying technique, a titanizing coating with improved wear resistance can be prepared on AISI 316 stainless steel. The purpose of this paper is to investigate process parameter effects by orthogonal array design. Four main factors, titanizing temperature, holding time, voltage difference and electrode distance, are adopted in orthogonal experiments. For each factor, four levels are set. The range analysis is used to investigate the factor and level influences on the coating thickness and specific wear rate. Meanwhile, the analysis of variance method is applied to calculate the contributions of each factor. The results indicate that temperature is most critical. In balancing the coating thickness and the wear property, the optimal process parameters are 950∘C, 3[Formula: see text]h, 200[Formula: see text]V and 18[Formula: see text]mm. Corresponding to the optimal process, the thickness and the specific wear rate of the titanizing coating are 10[Formula: see text][Formula: see text]m and 2.609E−05 mm3⋅ N−1⋅ m−1, respectively.

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