Processing method of conventional ingot-cast steel ingot for ultra-high temperature soft core forging

Abstract

The invention belongs to the field of forging, and particularly relates to a processing method of a conventional ingot-cast steel ingot for ultra-high temperature soft core forging. A numerical simulation method is adopted and processing parameters of steel ingot forging for ultra-high temperature soft core forging are combined. The processing method comprises the following steps of (1) bottom thermal insulation designing, and (2) flash groove sealing designing, wherein according to the bottom thermal insulation designing, when the steel ingot surface has certain strength, the steel ingot witha die is lifted and placed on a thermal insulation chassis which thermal insulation cotton is laid on, and static temperature uniforming processing is conducted, and according to the flash groove sealing designing, during the steel ingot cooling process, forced cooling measures are adopted to a flash groove, and therefore molten steel at the top solidifies to form a solidified shell with certainthickness. A method of changing local temperature field distribution of the steel ingot is adopted to reduce the upper and lower temperature difference of the steel ingot, and therefore the prepared steel ingot for ultra-high temperature soft core forging can meet the forging requirements in the subsequent forging process. The processing method is suitable for the conventional ingot-cast steel ingot for ultra-high temperature soft core forging, and can solve the problem that a steel ingot with high height-diameter ratio for soft core forging is uneven in temperature after demolding.

Description

technical field [0001] The invention belongs to the field of forging, specifically a method for processing conventional ingot-shaped steel ingots suitable for ultra-high temperature soft core forging, which is suitable for processing steel ingots suitable for ultra-high temperature soft core forging, especially for steel ingot blanks with large aspect ratio The preparation effect is remarkable. Background technique [0002] Large forgings are generally forged from large steel ingots. Inside the steel ingot, due to the solidification and shrinkage of the metal, a large number of micro-shrinkage cavities and loose defects are inevitably generated. These hole-type defects are dispersed in the center of the steel ingot, destroying the continuity of the material and affecting the mechanical properties of the forging. At the same time, due to the solute redistribution during the solidification process, the solidification end not only has a high alloy concentration, but also often...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment method suitable for conventional ingot-shaped steel ingots for ultra-high temperature soft core forging, so as to solve the problems of inefficient deformation and riser spray caused by uneven temperature distribution of steel ingots after demolding in the subsequent forging process. The problem of splashing molten steel

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