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Method for forging flat steel by using universal hammerhead

A universal hammer head and flat steel technology, applied to metal processing equipment, etc., can solve the problems of affecting production progress, wasting gas, increasing costs, etc., and achieve the effect of increasing process costs and reducing hammer head replacement

Active Publication Date: 2012-07-18
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of replacing the hammer head (replacing the hammer head for at least 2 hours), returning to the furnace again not only wastes gas, increases costs, but also affects production progress

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] This embodiment is implemented in the radial forging operation area of ​​Taiyuan Iron and Steel Profile Factory.

[0008] The test steel type is 20CrMo, ingot shape: 6 tons (round ingot, ingot size: large head size 730mm, small head size 600mm, ingot body length 2150mm, cap opening height 200mm), forging equipment is 1800 tons diameter forging machine, forging specifications 341mm×303mm flat steel. The universal hammer head U220 is used for forging, the size of the hammer head is 850mm (length) × 600mm (width) × 250mm (height), the wide side is 600mm, and the narrow side is 200mm.

[0009] Specific implementation process: electric furnace smelting steel ingots (6 tons and 10 pieces) red steel chamber-feeding heating furnace is rapidly heated to 1170±50°C, and after 2 hours of heat preservation, the unilateral reduction is 40-45mm and the frequency is 180 times / min. Carry out billet opening, after three passes of reduction, the billet is forged into a Φ440mm barren circ...

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PUM

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Abstract

A method for forging flat steel by using universal hammerheads comprises feeding red steels to a chamber heating furnace, quickly heating to 1170+ / -50 DEG C, holding for 2h, performing cogging at a single-edge reduction amount of 40-45mm and a frequency of 180 times / min, forging billet material into an intermediate billet with a diameter of 440mm after three-pass forging, forging from a machine A to a machine B at a reduced frequency of 90 times / min, a single-edge reduction amount of the R group of hammerheads of 30-40mm, a forging force of the R group of hammerheads of 800-900t, a single-edge reduction amount of the L group of hammerheads of 3-5mm and a forging force of the L group of hammerheads of 150-200t, forging from the machine B to the machine A at the reduced frequency of 90 times / min, a single-edge reduction amount of the L group of hammerheads of 30-40mm, a forging force of the L group of hammerheads of 800-900t, a single-edge reduction amount of the R group of hammerheads of 3-5mm and a forging force of the R group of hammerheads of 150-200t, performing final-pass forging at a single-edge reduction amount of 2-5mm, a forging force of 100-150t and a finish forging temperature not lower than 850 DEG C, and shaping four edges of the forging. The once-heating of flat steel forging is effectively controlled, the once qualified rate of the method through test is 100%, the production efficiency is improved, and at the same time the cost is lowered.

Description

Technical field: [0001] The invention belongs to a method for forging flat steel with a universal hammer head of a radial forging machine. The universal hammer head described in the invention is a U220 type hammer head, and its striking surface is composed of a horizontal block and a vertical block in a T shape, and one of the striking surfaces is wide The striking face, the other striking face is the narrow striking face, the length of the wide striking face is 600mm, and the length of the narrow striking face is 200mm. Background technique: [0002] When the diameter forging machine forges flat steel, it uses a hammerhead-flat steel hammerhead (code-named F70, the specification is 850mm (length) × 600mm (width) × 325mm (height), G120 specification is 850mm (length) × 600mm ( Width) × 325mm (height), the upper limit specification of forging raw materials is Φ650mm, the upper limit specification of flat steel finished products: 420mm × 70 mm, the maximum ratio of thickness t...

Claims

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Application Information

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IPC IPC(8): B21J5/00
Inventor 张晓敏王郁葱
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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