Mangesh P. Datar - Cummins

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8 Improve Phase BEFORE AFTER �� Operators are trained to get correct reading of temp. Electrode grinding angle is fixed as 15 Deg. Electrode dressing frequency fixed as once per shift. �� Calibration frequency of pyrometer is fixed as once in six months.
9 Design Of Experiments Factors : 1. Welding current of 1st layer --- Current 1 2. Welding current of 3rd layer --- Current 3 3. Preheating temperature of valve --- Temp. Levels : 1. Current 1 – High (100 amps) - Low ( 95 amps) 2. Current 3 – High (95 amps) - Low ( 85 amps) 3. Preheating temperature – High ( 500 Deg.Cen.) - Low ( 400 Deg.Cen.) The factors viz Current 1, Current 3, preheat temperature & First level interaction of Current 1 & Current 3 are having significant effect on % Laves phase in the microstructure. 95 Current 3 85 17.5 21.5 95 Cube Plot (data means) for Micro 14.5 18.5 Current 1 Best combination to get 21.5 % Laves Phase 13.0 10.5 400 105 10.0 9.5 500 Preheat temp Parameters optimized – Current of the first layer – 95 amp. Current of the third layer – 85 amp. Preheat temperature – 400 Deg. C
Page 1 and 2: Mangesh P. Datar Stabilize Tribaloy
Page 3 and 4: 3 Project Background � Increase d
Page 5 and 6: Regression Analysis: Microstructure
Page 7: 7 Improve Phase Base plate run out
Page 11 and 12: 11 Final Capability Final Capabilit

Mangesh P. Datar - Cummins

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