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Forging method of iron manganese aluminum austenitic steel ingot

A technology for iron-manganese-aluminum austenitic steel and austenitic steel, which is applied in the direction of manufacturing tools, improving process efficiency, forging/pressing/hammer devices, etc., can solve the problems of difficult forging of cast ingots, insufficient microstructure density, etc. Achieve the effect of low equipment requirements, easy industrialization, and good reprocessability

Active Publication Date: 2022-07-12
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a forging method for iron-manganese-aluminum austenitic steel ingots to improve the difficulty of forging iron-manganese-aluminum austenitic steel ingots and insufficient compactness of the structure The problem is that iron-manganese-aluminum austenitic steel forgings with grain size greater than or equal to grade 2 and surface crack depth less than or equal to 0.5mm can be forged to meet the performance requirements of subsequent reprocessing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] According to the step of the forging method of the iron-manganese-aluminum austenitic steel ingot of the embodiment of the present invention 1 is as follows:

[0049] (1) select Fe-30Mn-9Al-0.01Nb-1C Fe-30Mn-9Al-0.01Nb-1C iron-manganese-aluminum austenitic steel round ingot as raw material, remove head and tail parts, the ratio of steel ingot height to bottom circle diameter is 2.0, and the quality is 30kg;

[0050] (2) Put the steel ingot into the heating furnace, raise the temperature of the heating furnace to 1150 °C at a heating rate of 80 °C / min, keep it for 1 hour, then turn the steel once, and keep it for 1 hour;

[0051] (3) Preheat the forging hammer of the forging machine, the preheating temperature is 300 ℃, and add a glass powder lubricant on the anvil of the forging machine;

[0052] (4) The steel ingot is taken out from the heating furnace within 30s after the preheating of the forging hammer, and placed on the anvil of the forging machine to start forging...

Embodiment 2

[0058] According to the step of the forging method of the iron-manganese-aluminum austenitic steel ingot of the embodiment of the present invention 2 is as follows:

[0059] (1) select Fe-30Mn-10Al-0.04Nb-1.2C Fe-30Mn-10Al-0.04Nb-1.2C iron-manganese-aluminum austenitic steel round ingot as raw material, remove head and tail parts, the ratio of ingot height to bottom circle diameter is 2.8, and the quality is 85kg;

[0060] (2) Put the steel ingot into the heating furnace, raise the temperature of the heating furnace to 1150 °C at a heating rate of 80 °C / min, keep the temperature for 1.5 hours, then turn the steel once, and keep the temperature for another 1.5 hours;

[0061] (3) Preheat the forging hammer of the forging machine, the preheating temperature is 320 ℃, and add a glass powder lubricant on the anvil of the forging machine;

[0062] (4) The steel ingot is taken out from the heating furnace within 60s after the preheating of the forging hammer, and placed on the anvil...

Embodiment 3

[0068] According to the step of the forging method of the iron-manganese-aluminum austenitic steel ingot of the embodiment of the present invention 3 is as follows:

[0069] (1) Select Fe-29Mn-7Al-0.02Nb-0.9C Fe-29Mn-7Al-0.02Nb-0.9C iron-manganese-aluminum austenitic steel hexagonal ingot as raw material, remove the head and tail parts, the ratio of the height of the ingot to the diameter of the circumscribed circle of the section is 5.0, and the mass is 200kg ;

[0070] (2) Put the steel ingot into the heating furnace, raise the temperature of the heating furnace to 1150 °C at a heating rate of 80 °C / min, keep the temperature for 2 hours, then turn the steel once, and keep the temperature for another 2 hours;

[0071] (3) Preheat the forging hammer of the forging machine, the preheating temperature is 300 ℃, and add a glass powder lubricant on the anvil of the forging machine;

[0072] (4) The steel ingot is taken out from the heating furnace within 120s after the preheating...

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PUM

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Abstract

The invention discloses a method for forging an iron-manganese-aluminum austenitic steel ingot. 150℃ / min, raise the temperature of the heating furnace to 1140℃~1160℃, keep the temperature for 1h~3h, turn the steel once and then keep it for 1h~3h; preheat the forging hammer, the preheating temperature is 280℃~320℃; Place the ingot on the anvil within 5s to 120s after heating to start forging. The forging temperature is 1040℃~1080℃, the striking frequency of the forging hammer is 20 times / min to 30 times / min, and the forging ratio ranges from 3 to 6. The forging temperature is 900℃~950℃; the forgings are put into the heat treatment furnace within 5min~20min, the temperature is 940℃~980℃, the heat preservation is 30min~180min, after the heat preservation, the heat treatment furnace is heated at 10℃ / min~20℃ / min Cool down to 850 ℃ ~ 880 ℃, then take out the forging and move it to water within 1s ~ 60s to cool to room temperature. The forging method of the iron-manganese-aluminum austenitic steel ingot of the invention eliminates the forging cracks of the iron-manganese-aluminum austenitic steel ingot, and significantly refines the grain size of the iron-manganese aluminum austenitic steel.

Description

technical field [0001] The invention belongs to the technical field of material thermal processing, and more particularly relates to a method for forging an iron-manganese-aluminum austenitic steel ingot. Background technique [0002] Iron manganese aluminum austenitic steel is a new type of lightweight high-strength structural steel material, its density can be as low as 6.5g / cm 3 Compared with traditional steel, the density is reduced by about 15%, and at the same time, it has high strength, and the yield strength can reach more than 700MPa. It has good application prospects in transportation, aerospace, weaponry and other fields. [0003] Due to the addition of aluminum in the iron-manganese-aluminum austenitic steel, the fluidity of the iron-manganese aluminum austenitic steel is poor, which increases the probability of casting defects in the ingot; There is a large shrinkage phenomenon, so the structure of the iron-manganese-aluminum austenitic steel ingot is poor in c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J1/00B21J1/06B21K29/00C22C38/04C22C38/06C22C38/02C22C38/12C21D6/00C21D8/00
CPCB21J5/00B21J1/00B21J1/06B21K29/00C22C38/04C22C38/06C22C38/02C22C38/12C21D6/005C21D6/008C21D8/005Y02P10/20
Inventor 邢佳张利刘承志李涛涛刘艳莲刘永姜
Owner ZHONGBEI UNIV