Abstract
The steering knuckle of a truck with a load capacity of 22 tons broke during driving, and the wheel fell off; the truck had travelled only 1100 km. The composition, mechanical properties, fracture morphology, and microstructure of the failed parts were investigated. The results showed that the heat treatment of the steering knuckle is standardised. The composition of the raw material meets the relevant standard; however, spot segregation, pores, axial cracks, and inclusions appear in the raw material. Cracks originate from hard spots, which are caused by spot segregation, and surface defects, which are caused by pores. Axial cracks, pores, and inclusions can accelerate crack growth and cause rapid fracture of parts. According to the inspection and analysis results, we propose a product quality inspection and control scheme to the manufacturer.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
