Forging method for large and medium steel ingot

A large and medium-sized steel ingot technology, applied in the field of forging, can solve the problems of low material utilization rate, shrinkage cavity in the center of the clamp, etc., and achieve the effect of improving quality, easy cleaning, quality and yield guarantee

Active Publication Date: 2018-11-06
四川丰元机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of shrinkage cavity in the center of the tongs and low material utilization rate in the forging process of large and medium-sized steel ingots, and to provide a large and medium-sized steel ingot that can improve the internal product quality of large and medium-sized forgings and improve the utilization rate of steel ingots. Forging method

Method used

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  • Forging method for large and medium steel ingot

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Experimental program
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Effect test

Embodiment 1

[0036] The forging method of large and medium-sized steel ingot of the present invention comprises the following steps:

[0037] a) Production of steel ingots: cast steel ingots by pouring method. When producing steel ingots, select thermal insulation boards with good thermal insulation and corrosion resistance. The insulation board material around the surface of the steel ingot caps and molten steel should not stick together as much as possible;

[0038] b) Cleaning up residues: Before putting the steel ingot into the heating furnace for heating, clean up the residual material of the heat insulation plate at the mouth of the cap as much as possible, and at the same time clean the connection between the ingot body and the mouth of the cap and the outer surface of the mouth of the cap with flame gas cutting and other methods to deal with the flying skin , interlayer and other irregular residual steel, try to ensure a smooth transition between the ingot body and the cap opening, ...

Embodiment 2

[0045] The forging method of large and medium-sized steel ingot of the present invention comprises the following steps:

[0046] a) Production of steel ingots: cast steel ingots by pouring method. When producing steel ingots, select thermal insulation boards with good thermal insulation and corrosion resistance. The insulation board material around the surface of the steel ingot caps and molten steel should not stick together as much as possible;

[0047] b) Cleaning up residues: Before putting the steel ingot into the heating furnace for heating, clean up the residual material of the heat insulation plate at the mouth of the cap as much as possible, and at the same time clean the connection between the ingot body and the mouth of the cap and the outer surface of the mouth of the cap with flame gas cutting and other methods to deal with the flying skin , interlayer and other irregular residual steel, try to ensure a smooth transition between the ingot body and the cap opening, ...

Embodiment 3

[0054] The forging method of large and medium-sized steel ingot of the present invention comprises the following steps:

[0055] a) Production of steel ingots: cast steel ingots by pouring method. When producing steel ingots, select thermal insulation boards with good thermal insulation and corrosion resistance. The insulation board material around the surface of the steel ingot caps and molten steel should not stick together as much as possible;

[0056] b) Cleaning up residues: Before putting the steel ingot into the heating furnace for heating, clean up the residual material of the heat insulation plate at the mouth of the cap as much as possible, and at the same time clean the connection between the ingot body and the mouth of the cap and the outer surface of the mouth of the cap with flame gas cutting and other methods to deal with the flying skin , interlayer and other irregular residual steel, try to ensure a smooth transition between the ingot body and the cap opening, ...

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Abstract

The invention discloses a forging method for a large and medium steel ingot and belongs to the technical field of forging. The problems that in a large and medium steel ingot forging technology, the center of a tong handle inwards contracts, and the material utilization rate is low are solved. The forging method for the large and medium steel ingot can improve the internal product quality of a large and medium forge piece and increase the steel ingot material utilization rate. The forging method comprises the following steps of steel ingot producing, residue clearing, pre-upsetting, tong handle pressing, upsetting, drawing out and cap section cutting. Pre-upsetting is conducted before tong handle pressing operation of the large and medium steel ingot, thus the probability of inward contraction of the center of the tong handle of the steel ingot is decreased greatly, the steel ingot material utilization rate is increased, and the quality of the forge piece is improved.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging method of large and medium-sized steel ingots. 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 pouring into the mould, the molten steel condenses and is 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 steel ingo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06B21J5/08B21J5/00
CPCB21J5/002B21J5/06B21J5/08
Inventor 余佑祥崔建强冯东林吕汝兵
Owner 四川丰元机械制造有限公司
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