ZhaoYan

The shank adapter of hydraulic rock drill broke after drilling 4000 m. Failure analysis is conducted using fracture morphology observation, chemical composition, mechanical properties and microstructure analysis. The results show that the material of shank adapter has well wear resistance and

The 20CrNi3 shank adapter for hydraulic rock drill was fractured after drilling for 300 meters．The fracture causes of 20CrNi3 shank adapter were analyzed through chemical composition analysis，fracture morphology and microstructure observation，mechanical properties testing． The results showed