WI-36 WORK INSTRUCTION FOR INCLUSION RATING

Doc. No:  KKM/GWI/36 WORK INSTRUCTION FOR INCLUSION RATING
Rev.  No.:  02
Rev. Date:   24.02.2016

 

STEPS INSTRUCTIONS
Sample Preparation
  1. Select and cut the test piece in longitudinal direction having polishable area of 200(+­ 50)mm2 approx.
  1. Hard the test piece in muffle furnace
  1. Grind the test piece on belt grinder up-to 1m.m. approx to remove scale and decarb surface.
  1. Rub the test piece on emery paper of no. 180,240,320.  Every time emery paper should be changed when all previous scratch marks are removed the direction of rubbing shall also be changed to the direction right angle to previous direction.
  1. Polish the test piece with polishing cloth with paraffin and diamond paste until all scratch marks are removed.
  1. Wash the test piece by water and then with methyl alcohol.
  1. Dry the test piece to remove with wet spots.
Inclusion Rating
  1. See Oxide, Sulphide, Silicates and alumina in microscope at 100 X magnification
  1. Compare with standard chart IS:4163:1982 and determine inclusion rating.