This paper focused on determining the increased tendency of cracking after die forging process high nickel and chromium steel. The increase in carbon content austenitic nickel–chromium steel promoted valve forgings to intergranular crack head. Attention was paid issues related chemical composition material be considered when hot forming components. Optical scanning electron microscopies were us...

The work is devoted to study of an experimental PM nickel-based superalloy Ni-16(Al, Ti, Nb, Ta)-30(Cr, Co, Mo, Hf, W, Re) (wt.%). initial as-HIP’ed material was prepared as cylinders with a size ?100 × 200 mm. hot workability the evaluated by compression tests small samples under isothermal conditions. were performed at temperatures 1150 –1240°C strain rate ? =10?4 –10?1 s?1. Some subjected pr...

Achievement of critical dimensions after wholesale removal of stock from large, ring rolled Waspaloy forgings and fabrications has been complicated by residual stresses induced via rapid quench from the solution heat treat cycle. Part movement during machining can be reduced significantly by substituting air cool for the oil quench commonly specified to achieve high mechanical strengths. Howeve...

In the process of production, automobile steel forgings are prone to various cracks, which affect product quality. At present, defects mainly detected by fluorescent magnetic particle inspection and manual inspection. Aiming at problems low detection accuracy efficiency in this method, an improved convolutional neural network model is proposed. The images two typical were intelligently inspecte...