Large steel ingot rapid forging method and device

A steel ingot and large-scale technology, applied in the field of steel ingot forging, can solve the problems of low forging efficiency of large steel ingots, low impact frequency of punches, impact cracks of steel ingots, etc., and achieve the effect of lowering temperature, high forging efficiency and improving forging efficiency

Active Publication Date: 2021-01-22
山东润金重工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The forging efficiency of traditional large steel ingots is low, and the energy consumption is high. In addition, the impact frequency of traditional forging punches is low, which is likely to cause defects such as impact cracks in steel ingots. Therefore, We propose a method and device for rapid forging of large steel ingots

Method used

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  • Large steel ingot rapid forging method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for rapid forging of a large steel ingot, characterized in that it comprises the steps of:

[0026] Step 1: Place the steel ingot at the heating device, quickly heat the steel ingot to 1250 degrees, and keep it warm;

[0027] Step 2: Rapidly cooling down the temperature of the skin layer of the steel ingot obtained in Step 1 to 720 degrees;

[0028] Step 3: Place the steel ingot at the forging press for forging, speed up the impact frequency of the forging head and reduce the punch force during forging;

[0029] Step 4: After forging to the design size and shape, quickly cool down to 400 degrees to maintain the internal crystallization size of the forging;

[0030] Step 5: Place the steel ingot obtained in Step 5 in an annealing furnace for annealing, the annealing temperature is controlled at 640 degrees, and the annealing time is 2 hours.

[0031] In the step five, hydrogen expansion annealing or other annealing methods are selected for the annealing of the...

Embodiment 2

[0044] A method for rapidly forging a large steel ingot, comprising the steps of:

[0045] Step 1: Place the steel ingot at the heating device, quickly heat the steel ingot to 1250 degrees, and keep it warm;

[0046] Step 2: Rapidly cooling the temperature of the skin layer of the steel ingot obtained in Step 1 to 725 degrees;

[0047] Step 3: Place the steel ingot at the forging press for forging, speed up the impact frequency of the forging head and reduce the punch force during forging;

[0048] Step 4: After forging to the design size and shape, quickly cool down to 500 degrees to maintain the internal crystallization size of the forging;

[0049] Step 5: Place the steel ingot obtained in Step 5 in an annealing furnace for annealing, the annealing temperature is controlled at 660 degrees, and the annealing time is 3 hours.

[0050] In the step five, hydrogen expansion annealing or other annealing methods are selected for the annealing of the steel ingot.

[0051] The co...

Embodiment 3

[0063] A method for rapidly forging a large steel ingot, comprising the steps of:

[0064] Step 1: Place the steel ingot at the heating device, quickly heat the steel ingot to 1250 degrees, keep warm, consider the large steel ingot to be heated by electricity, use the resistance of the steel ingot to heat from the inside to the outside, and reduce the heating time;

[0065] Step 2: Rapidly cooling down the temperature of the skin layer of the steel ingot obtained in Step 1 to 730 degrees;

[0066] Step 3: Place the steel ingot at the forging press for forging. During forging, the impact frequency of the forging head is accelerated while the punch force is reduced, which can effectively prevent defects such as microcracks in the steel ingot;

[0067] Step 4: After forging to the design size and shape, quickly cool down to 600 degrees to maintain the internal crystallization size of the forging;

[0068] Step 5: Place the steel ingot obtained in Step 5 in an annealing furnace f...

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PUM

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Abstract

The invention discloses a large steel ingot rapid forging method and device. The method comprises the following steps: 1, placing a steel ingot at a heating device, quickly heating the steel ingot to1250 DEG C, and keeping the temperature; 2, rapidly lowering the temperature of the outer skin layer of the steel ingot obtained in step 1 to 725 DEG C; 3, placing the steel ingot at a forging press to be forged and pressed, and increasing the impact frequency of a forging and pressing head while reducing the punch impact force during forging and pressing; 4, after forging and pressing to the designed size and appearance, rapidly cooling to 500 DEG C, and keeping the internal crystallization size of a forging; and 5, placing the steel ingot obtained in step 5 into an annealing furnace. According to the large steel ingot rapid forging method and device, forging and pressing of a steel ingot body can be achieved through the forging and pressing head, through cooperative arrangement of a spring, a sliding rod and a fixing plate, the impact force of the forging and pressing head is reduced through the spring while the impact frequency of the punch is increased, and defects such as micro-cracks in the surface of the steel ingot body can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of steel ingot forging, in particular to a large-scale steel ingot rapid forging method and device. Background technique [0002] Large and medium-sized forgings are generally produced by free forging, and the raw materials used are large and medium-sized steel ingots. The pouring methods for steel ingot production generally include upper injection method and lower injection method. The upper injection method is to directly pour molten steel from the top of the ingot mold After being poured into the mold, the molten steel is condensed and demoulded to become a steel ingot; while the pouring method is that the molten steel flows through the channel of the chassis of the ingot mold and flows into the mold from the bottom of the mold, and the productivity of the pouring method is higher. In the process of producing large and medium-sized steel ingots by casting method, in order to reduce the consumption of stee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J9/02B21J1/06B21K27/00B21K29/00
CPCB21J5/00B21J9/02B21J1/06B21K27/00B21K29/00Y02P10/20
Inventor 李全君王艳霞王顺利
Owner 山东润金重工科技有限公司
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