Friction Welding

The test data of the model of TH welding machine (welder) which we imported from Japan.

  • Tensite length

-Max. Bending Load (kg)Bending Angle (degree)
SS-41 S-45C SS-41 S-45C
Base Material 3270 4850 150° 148°
Friction Welding 3440 5010 150° 150°
Friction Welding & Tempered   5520   150°

(SS-41, S-45C equivalent materials, test piece JIS No 4 used)

 

  • Bending Strength

The max. bending strength after friction welding increases by 10%. The friction-welding and tempered high carbon steel exhibits bending strength equal to the base metal and close not cause breaking even when bent at 150°.

 

-Yield Point (kg/mm²)Tensile Strength (kg/mm²)Elongation (%)Contragtion (%)
SS-41 S-45C SS-41 S-45C SS-41 S-45C SS-41 S-45C
Base Material 32.8 43.3 46.3 68.8 40.1 28.6 67.7 54.0
Friction Welding 34.5 45.7 48.5 70.4 33.8 24.4 69.3 53.2
Friction Welding & Tempered       80.2   28.5   59.0

 

  • Fatigue Strength Under Rotatory Bending

Fatigue limit becomes higher at friction-welding portion. The friction-welded and tempered high carbon steel exhibits fatigue strength equal to the base metal.

Fatigue test under rotary

 

  • Microstructure

Since heat generated by the friction welding gives only local influence to the material, the adverse effect is almost negligible. As shown in the microscopic photos no boundary appears where the material welded and joined portion is well dispersed.

Distrbution of hardness after friction welding