A Method for Eliminating Surface Wrinkles of Heat Resistant Alloy
A heat-resistant alloy and hot-working technology, which is applied in the field of eliminating wrinkles on the hot-working surface of heat-resistant alloys, can solve problems such as surface wrinkles during hot-working of heat-resistant alloys, and achieve the effects of eliminating wrinkle defects, reducing material costs, and improving yield.
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Embodiment 1
[0024] A 50Kg vacuum induction furnace is used to smelt the heat-resistant alloy ingot of the present invention. After long-term high-temperature homogenization and diffusion annealing, a thermal simulator is used to conduct thermal compression and thermal tensile tests at 1000-1200° C. to observe macroscopic surfaces. The results show that surface wrinkles appear in the deformation zone of the sample whose deformation temperature is lower than 1100℃, and the lower the temperature, the more serious the wrinkles; reduce.
Embodiment 2
[0026] Use 200Kg vacuum induction furnace to smelt two heat-resistant alloy ingots of the present invention. After the steel ingot is polished, the round ingot size is Ф200mm and the height is 300mm. It is subjected to long-term high-temperature uniform diffusion annealing, and then upsetting. One of the furnaces strictly controls the lower limit deformation temperature. Higher than 1100 ℃ and 3 mm carbon steel ladle, no surface wrinkles observed after upsetting; while another furnace is used as a comparative example, the temperature of the upsetting process is about 1050 ℃, no sheath treatment, serious surface wrinkles observed after cooling. The comparative example with serious surface wrinkle needs to turn a thicker layer, and the amount of turned metal is three times that of the example without surface wrinkle.
Embodiment 3
[0028] Industrial trial production: Vacuum induction smelting VIM+vacuum self-consumption VAR was used to remelt 5.5 tons of heat-resistant alloy ingots of the present invention, and a company's 15,000 tons of billet making machine billets were used. The billet making process included extrusion cylinder upsetting and punching. The billet making process is as follows: the surface of the steel ingot is wrapped with a 4mm-thick No. 45 steel plate, and the joint is welded. The two circular sections of the steel ingot are not wrapped to limit the flow of metal on the outer surface during upsetting. Load the steel ingot into the furnace for high-temperature long-term uniform diffusion annealing, take it out, roll-coat the glass lubricant on the roller coating table, put it into the preheated upsetting cylinder mold for upsetting, and the upsetting deformation temperature is higher than 1100°C. After upsetting, move the upper mold switching mechanism of the billet making machine to pu...
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Abstract
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