Prior to roll quenching and tempering, appropriate heat treatment processes can improve the grass-like echo defects of roll blanks. Aiming at the grass-like echo defects detected by ultrasonic testing in 70Cr5Mo steel roll blanks, this paper adopts post-forging heat treatment processes such as normalizing and spheroidizing annealing to refine the microstructure morphology of 70Cr5Mo steel blanks, obtain favorable microstructural features, and reduce or eliminate grass-like echoes in the blanks, so as to ensure no adverse effects on inspection and service performance.
As the core equipment of the forging industry, the fast forging hydraulic press plays an important role in promoting the upgrading of traditional industries and driving the coordinated development of upstream and downstream industrial chains.
Q355D low-alloy steel is widely known for its excellent tensile strength and yield strength, and exhibits outstanding toughness and impact resistance. Its application in mechanical manufacturing is crucial, especially in the production of key components such as large oil cylinder barrels.
