Forging method of low-plasticity steel forge piece

Abstract

The invention provides a forging method of a low-plasticity steel forge piece. The forging method comprises the following steps that S001, a low-plasticity steel ingot subjected to alkaline electric arc furnace smelting, ladle refining furnace heating, vacuum decarburization and vacuum degassing smelting is adopted as a raw material of the forge piece; S002, the forge piece is heated to the highest forging temperature in a heating furnace and then subjected to heat preservation for a period of time; S003, an upper anvil, a lower anvil, a manipulator clamp jaw and used auxiliary tools are are preheated, the upper anvil is a flat anvil, and the lower anvil is an arc anvil; S004, the forge piece is subjected to strong pressure upsetting, and an upsetting speed does not exceed a material deformation limit; S005, the forge piece is subjected to radial strong pressing, and the pressing amount is smaller than or equal to 15%; S006, when the temperature of the forge piece is reduced to be lower than a final forging temperature, the forge piece is returned to the furnace to be heated to the highest forging temperature, heat preservation is conducted for a period of time, and then the forgepiece continues to be forged till the forge piece is forged to a proper size; and S007, after the forge piece is forged, the forge piece is cooled after being forged, then the forge piece is subjectedto heat preservation at the temperature of 400 DEG C-450 DEG C, the temperature is increased to 600 DEG C-650 DEG C, then heat preservation is conducted, and the forge piece is charged into the furnace to be subjected to normalizing and annealing treatment.

Description

technical field [0001] The invention belongs to the field of low-plastic forging forging technology, in particular to a forging method of low-plastic steel forging. Background technique [0002] The forging of low-plasticity steel forgings has always been prone to surface cracking due to its narrow forging temperature range, low material plasticity, difficulty in deformation, too fast upsetting forgings and elongation at the final forging temperature. The success of forging low-plasticity steel forgings in China The rate is not high, and in order to avoid surface cracks affecting the machining size, the material utilization rate of low plasticity steel forgings is set very low, which is not conducive to reducing the consumption of raw materials to achieve the purpose of reducing manufacturing costs. Contents of the invention [0003] In view of this, it is an object of the present invention to overcome the above-mentioned problems or at least partially solve or alleviate t...

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Problems solved by technology

[0002] The forging of low-plasticity steel forgings has always been prone to surface cracking due to its narrow forging temperature range, low material plasticity, difficulty in deformation, too fast upsetting forgings and elongation at the final forging temperature. The success of forging low-plasticity steel forgings in China The rate is not high, and in order to avoid surface cracks affecting the machining size, the material utilization rate of low plasticity steel forgings is set very low, which is not conducive to reducing the consumption of raw materials to achieve the purpose of reducing manufacturing costs

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