BANGKOK SPEC Technical information (Heat Treatment) Flame-hardening Procedure T Step 1. Appropriate operating place for flame-hardening Flame-hardening should be done under the shade to identify the temperature of the work piece. Under the excessive light, the judgment of temperature of heating die edge is difficult. Step 2. Selection of gas burners Suitable gas burners for flame-hardening Type of bumer cutting torch x No.225 type burner is recommended for ger Welding torch No100-300 No1 -2 type burner when the shap Pressure oxygen 1.5K g/cm2 5kgycm2 *Use No 100-150 is liable to distort. of gases acetylene Step 3. Arrangement of dies If the dies are flam *In case of the assembled dies, disassemble all the dies from the die holder. of dies. on the holder as assembled, a gap between dies might be widened by distortion Put the die on the position easy to perform Step 4. Adjustment of flame