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.

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.

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.

Wear-Resisting Property of 304 Stainless Steel Surface after Infiltration of Indium and Copper Alloys by Double Glow Technology

2014 ◽  
Vol 1030-1032 ◽  
pp. 263-267
Author(s):  
Yi Guang Wang ◽  
Jin Yong Xu ◽  
Bo Gao ◽  
Cheng Gao ◽  
Yin Wang
Keyword(s):  
Stainless Steel ◽  
Diffusion Layer ◽  
High Speed ◽  
Steel Surface ◽  
Copper Alloys ◽  
Testing Machine ◽  
Wear Testing ◽  
304 Stainless Steel ◽  
Stainless Steel Surface ◽  
Obvious Effect

Copper and Indium alloys elements were metallized into 304 Stainless Steel surface by Double Glow Plasma Surface Alloying Technology (Double Glow Technology for short). Microstructure and Resistance property of diffusion layer analyzer was analysed by metallographic microscope, scanning electron microscopy, energy spectrum, friction and wear testing machine of high speed reciprocating. The results show that process parameters of the permeability copper and indium has an obvious effect for the organization structure and performance of diffusion layer. The friction coefficient of alloying layer has a significant decrease compared with the substrate. The wear-resisting performance has an effective change.

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.

Development of Mathematical Models for Prediction of Weld Bead Geometry of GTAW Stainless Steel

2017 ◽  
Vol 867 ◽  
pp. 88-96
Author(s):  
S.M. Ravikumar ◽  
P. Vijian
Keyword(s):  
Stainless Steel ◽  
Process Parameters ◽  
Welding Current ◽  
Weld Bead ◽  
304 Stainless Steel ◽  
Graphical Form ◽  
Bead Geometry ◽  
Depth Of Penetration ◽  
Weld Bead Geometry ◽  
Bead Width

Welding input process parameters are playing a very significant role in determining the weld bead quality. The quality of the joint can be defined in terms of properties such as weld bead geometry, mechanical properties and distortion. Experiments were conducted to develop models, using a three factor, five level factorial design for 304 stainless steel as base plate with ER 308L filler wire of 1.6 mm diameter. The purpose of this study is to develop the mathematical model and compare the observed output values with predicted output values. Welding current, welding speed and nozzle to plate distance were chosen as input parameters, while depth of penetration, weld bead width, reinforcement and dilution as output parameters. The models developed have been checked for their adequacy. Confirmation experiments were also conducted and the results show that the models developed can predict the bead geometries and dilution with reasonable accuracy. The direct and interaction effect of the process parameters on bead geometry are presented in graphical form.

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.

Research on NC Electrochemical Mechanical Complex Machining Stainless Steel

2010 ◽  
Vol 458 ◽  
pp. 331-336
Author(s):  
Wei Min Gan ◽  
Xi Lian Xie ◽  
Bo Xu ◽  
W.B. Huang
Keyword(s):  
Stainless Steel ◽  
Machine Tool ◽  
Process Parameters ◽  
High Speed ◽  
Orthogonal Experiment ◽  
High Strength ◽  
304 Stainless Steel ◽  
Depth Of Cut ◽  
Tool Electrode ◽  
Feed Speed

For hard machining metal materials with high rigidity，high strength or high toughness, the method of electrochemical mechanical complex machining is proposed. A NC high-speed machine tool for carving and milling is transformed into a NC electrochemical mechanical complex machine tool in which complex tool-electrodes, particular tool holders, a new rotary table, a protective flume for electrolyte and pipelines are made and assembled, so that machine tool can achieve a series of machining, such as milling, drilling, grinding and polishing by utilizing complex tool-electrode motion generated by NC. For 304 stainless steel orthogonal experiment is carried out, and five principal process parameters that are spindle rev, feed speed, voltage, pressure of electrolyte and depth of cut, are investigating in the method of NC Electrochemical Mechanical complex machining. The optimization process parameters are obtained.

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