GH864 high-temperature alloy die forging method

Abstract

The invention relates to a GH864 high-temperature alloy die forging method. The GH864 high-temperature alloy die forging method comprises the following steps: a forging blank is fed in a heating furnace, the heating furnace is heated up to a forging temperature T according to convectional forging heating parameters, and the temperature T is kept by S1; the forging blank is taken out from the heating furnace, is wrapped with an insulation material, and is fed in the heating furnace for insulation again, the temperature of the heating furnace is higher than the temperature T by 10-20 DEG C, and the lasting time is 100-160 min; and the blank is discharged from the furnace, and the forging blank and the external insulation material are both fed in a forging machine for die forging until a forging is molded. The high-temperature alloy die forging method wraps the insulation material out of the heated forging blank to prevent quick lowering of the surface temperature of the blank to reduce internal and external temperature difference of the blank; the finally produced forging is uniform in structure and dense in grains; the crystal mixing phenomenon is obviously improved; and the product performance is improved.

Description

technical field [0001] The invention relates to the field of high-temperature alloy forging, in particular to a method for die forging by wrapping a heated forging blank with an insulating material. Background technique [0002] At present, the commonly used technological process for the production of GH864 superalloy die forging is that the cake is preheated, brushed with glass lubricant, heated in a heating furnace, and die forged. Brush the glass lubricant, then enter the heating furnace to heat up to the forging temperature according to a certain temperature curve, and keep warm at the forging temperature, and then put the billet into the forging machine for die forging. [0003] Since the surface temperature of the billet begins to drop after it is taken out of the heating furnace, and the allowable temperature range of superalloy forging is relatively narrow, in the process of superalloy forging, if the heating temperature of the billet is not enough, the operation is ...

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Problems solved by technology

[0003] Since the surface temperature of the blank begins to drop after it is taken out of the heating furnace, and the allowable temperature range for high-temperature alloy forging is relatively narrow, in the process of high-temperature alloy forging, if the heating temperature of the blank is not enough, the operation is slightly slow, or the ambient temperature is low , when the billet enters the forging machine for production, its surface temperature can no longer guarantee the forging temperature required for forging forming, resulting in serious mixed crystal phenomenon in the final product, product performance degradation, and cracking on the billet surface in severe cases

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