The influence of parameters of shot peening process for surface treatment (compressed air pressure 0.1~0.4MPa

running speed 4~1m/min) on performance of M42 (/% ： 1.08C

1.5W

9.4Mo

3.8Cr

1.2V

8.0Co) - D6A (/% : 0.48C

1.0Mo

1.1Cr

0.1V

0.6Ni) bi-metal band-saw blade has been studied by binary image measuring instrument to observe surface compression stress

blade back shot peening coverage rate and tooth tip condition

and tooth tip fracture condition as non-fitting cutting steel GCrl5 bar products and fatigue life of blade back with cutting steel 0.45C and idling fatigue test after shot peening treatment of blade. The results show that with suitable shot peening process- compressed air pressure 0.3 MPa

running speed 3mm/min and blade back shot peening coverage rate reach 100%

after shot peening the stable rounded comer of tooth tip is formed to bear the impact force produced by cutting and vibrating and improve the wear resistance of band-saw blade tooth tip

the average service life of teeth increases by 66% and the tested fatigue life of band-saw blade back increases by 45%~70%.