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Application of Response Surface Methodolody to Prediction of Dilution in Plasma Transferred Arc Hardfacing of Stainless Steel on Carbon Steel

V Balasubramanian , A K Lakshminarayanan , R Varahamoorthy , S Babu

钢铁研究学报(英文版)

The application of response surface methodology was highlighted to predict and optimize the percentage of dilution of ironbased hardfaced surface produced by the PTA (plasma transferred arc welding) process. The experiments were conducted based on fivefactor fivelevel central composite rotatable design with full replication technique and a mathematical model was developed using response surface methodology. Furthermore, the response surface methodology was also used to optimize the process parameters that yielded the lowest percentage of dilution.

关键词: plasma transferred arc hardfacing;dilution;response surface methodology

Evaluation of Dry Sliding Wear Behaviour of Plasma Transferred Arc Hardfaced Stainless Steel

C S Ramachandran , V Balasubramanian , R Varahamoorthy

钢铁研究学报(英文版)

The effects of different experimental conditions on the dry sliding wear behavior of stainless steel surface produced by plasma transferred arc (PTA) hardfacing process were studied. The wear test was conducted in a pinonroller wear testing machine, at constant sliding distance of 1 km. Mathematical models were developed to estimate wear rate incorporating with rotational speed, applied load and roller hardness using statistical tools such as design of experiments, regression analysis and analysis of variance. It is found that the wear resistance of the PTA hardfaced stainless steel surface is better than that of the carbon steel substrate.

关键词: dry sliding wear;plasma transferred arc hardfacing;carbon steel;stainless steel;variance analysis;experimental design

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