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Method for forging alloy steel ingot with smaller diameter and larger height-diameter ratio into wider flat billet
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An alloy steel, smaller technology, applied in metal processing equipment and other directions, to achieve the effect of improving yield, improving quality and reducing material loss
Active Publication Date: 2013-09-25
FUSHUN SPECIAL STEEL SHARES
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[0003] The purpose of the present invention is to improve the deficiencies of the existing forging process and provide a method suitable for forging wider slabs from alloy steel ingots with smaller diameters and larger height-to-diameter ratios
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Embodiment 1
[0024] The electroslag ingot Ф480mm is forged into a wide slab of 620mm×150mm.
[0025] Its forging steps are:
[0026] 1. After the steel ingot 3 is thoroughly burned, the steel ingot 3 is directly placed horizontally on the platform 4 by using a trackless car or a crane for feeding;
[0027] 2. Use the upper wide flat anvil 1 to carry out heavy pressure on the steel ingot 3 placed horizontally on the platform 4 (such as figure 1 ), with a reduction of 200mm to 220mm, forged into a blank 7;
[0028] 3. After leveling, measure the width of the blank 7 to reach 650mm-680mm, fully achieving the widening effect;
[0029] 4. The widened blank 7 directly presses the flat jaw 6 at the end of the bottom pad (such as image 3 ), then return to the furnace and burn again;
[0030] 5. The billet 7 is refired for 1.5h to 2h and released from the furnace, and is forged into a 620mm×150mm slab in one fire; the surface of the slab has no damage.
Embodiment 2
[0032] The Ф508mm consumable ingot has a diameter of Ф480mm after turning, and is forged into a wide slab of 620mm×150mm.
[0033] Its forging steps are:
[0034] 1. After the steel ingot 3 is thoroughly burned, the steel ingot 3 is directly placed horizontally on the platform 4 by using a trackless car or a crane for feeding;
[0035] 2. Use the upper flat anvil 2 to carry out heavy pressure on the steel ingot 3 placed horizontally on the platform 4 (such as figure 1 ), the reduction is 80mm~120mm;
[0036] 3. Place the upsetting plate 5 between the steel ingot 3 and the upper flat anvil 2 to repress the steel ingot 3 (such as figure 2 ), control the reduction of 80mm ~ 120mm, forging into blank 7;
[0037] 4. After leveling, measure the width of the blank 7 to reach 650mm-680mm, fully achieving the widening effect;
[0038] 5. The widened blank 7 directly presses the flat jaw 6 at the end of the bottom pad (such as image 3 ), then return to the furnace and burn again;...
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Abstract
The invention aims to improve the shortage of existing forging, upsetting and drawing process, and provides a method for forging an alloy steel ingot with a smaller diameter and a larger height-diameter ratio into a wider flat billet. In order to achieve the purpose, the technical scheme includes that the method comprises the steps: 1 directly and horizontally placing the burnt steel ingot on a platform for forging; 2 controlling rolling reduction to broaden the billet without cracks; and 3 directly flattening a jaw at an underlaying end of the broadened billet and performing once-heating production after return for reburning. The method has the advantages that all forging processes only need twice-heating production, loss of materials on the jaw is reduced, energy is saved, yield is improved, the surface of the finished flat billet has no breakage, quality is improved, coping is omitted, rear finishing amount is decreased, the weight of the flat billet can be directly checked and the flat billet can be directly put in storage after the head and the tail of the flat billet are sawed, production cycle is shortened, and production efficiency is improved.
Description
technical field [0001] The invention belongs to a forging method, in particular to a method for forging a wider slab from an alloy steel ingot with a smaller diameter and a larger ratio of height to diameter. The alloy steel ingot referred to here has a diameter less than ∮500mm and a height-to-diameter ratio greater than 2.5; the width of the slab referred to is greater than 600mm. Background technique [0002] When using the existing forging process to forge a wide slab with a width greater than 600mm from an alloy steel ingot with a diameter less than ∮500mm, in order to make the width meet the process requirements, the upsetting process is generally used. The upsetting and drawing process has the following disadvantages: it needs to be finished by pressing the jaws, upsetting, and elongating; when the height-to-diameter ratio is greater than 2.5, the surface is prone to breakage after upsetting, and the material loss of the jaws is relatively large when the round jaws ar...
Claims
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