Forgings

Hot press molds are critical components in high-temperature manufacturing processes such as forging, die-casting, and extrusion, where they must withstand extreme heat, mechanical stress, and thermal cycling. These molds are designed to shape materials under high pressure and temperature, requiring durable and high-performance materials to maintain integrity and achieve precise shapes.

Thermal cycling, which refers to the repeated heating and cooling of materials during manufacturing processes, plays a significant role in hot forging operations. In these processes, materials are exposed to extreme temperature fluctuations, which can cause thermal stresses and contribute to material degradation over time.

This article introduces the key points of MC5D roll billet manufacturing technology. Through the reasonable application of forging process and high-temperature diffusion technology, the original segregation of roll billet is improved, liquid precipitation carbonization is eliminated, and the density of roll billet is increased to achieve high-quality roll billet quality requirements, while effectively reducing production costs..

H13 steel, as a widely used hot work die steel worldwide, can obtain a mixed microstructure of martensite and bainite after normal forging process. It has high hardness and is difficult to cut, so spheroidization annealing is necessary. Spheroidization annealing plays a significant role in eliminating residual stress in steel, reducing hardness, and evenly distributing alloy carbides. It also prepares the microstructure for final quenching and tempering heat treatment.

Slow cooling after forging will result in coarse structure and the appearance of network carbides, while high-temperature normalizing can improve the segregation of network carbides and materials. Therefore, efforts can be made to improve the annealed structure through two aspects: appropriate rapid cooling after forging, high-temperature normalizing, and finally spheroidization annealing.

Ultra large support roller forgings are prone to ultrasonic testing failure due to incomplete forging and compaction of the core. This time, the composite forging main deformation process of "upsetting WHF method for elongation+upsetting FM method for elongation" is adopted to achieve forging looseness and porosity, improve stress and inclusion distribution in the core of the steel ingot, and prevent the formation of new crack sources.