A method for composite casting of large alloy steel ingots with mold core integration

A technology of composite steel and alloy steel, which is applied in the field of composite casting of metal materials, can solve the problems of difficult fixing of bars and cumbersome cloth distribution, and achieve the effect of increasing solidification speed, increasing solidification speed and reducing production cost

Inactive Publication Date: 2018-07-31
佛山市盛泽泓精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is cumbersome to fabricate, and the bar is not easy to fix, and the weight ratio of the bar to the ingot needs to be controlled within the range of 0.8%-3%.

Method used

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  • A method for composite casting of large alloy steel ingots with mold core integration
  • A method for composite casting of large alloy steel ingots with mold core integration
  • A method for composite casting of large alloy steel ingots with mold core integration

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for integrated composite casting of a large alloy steel ingot with a mold core, taking a large 20CrMoV low alloy steel ingot with a weight of 160 tons as an example by vacuum pouring in the above-injection steel casting method, the steps of the method are as follows:

[0033] a. If Figure 1-Figure 4 and Figure 6 As shown, the selected quality qualified material is 20CrMoV, six rolling slabs with a size of 120mm * 1600mm * 3120mm, and a piece of rolling slabs with a size of 120mm * 1600mm * 3440mm, as the slab for welding steel ingot mold 4, The surface of the slab is cleaned, degreased and dried according to figure 1 and figure 2 As shown, a rolling slab with a size of 120mm * 1600mm * 3440mm is used as the mold bottom of the ingot mold 4, and two rolling slabs with a size of 120mm * 1600mm * 3120mm are used to make the sides of the ingot mold 4, and four A rolled slab with a size of 120mm×1600mm×3120mm is used as the front and back of the ingot mold 4, a...

Embodiment 2

[0039] A method for integrated composite casting of a large alloy steel ingot with a mold core. The method of casting and preparing a 45-ton 304 stainless steel / 16Mn low-alloy steel large composite steel ingot under the protection of argon by using the above injection method is an example. The steps of the method are as follows:

[0040] a. If Figure 1-Figure 4 and Figure 6 As shown, the quality qualified material is selected as 304 stainless steel, six rolled slabs with a size of 80mm * 1000mm * 2400mm and a piece of rolled slabs with a size of 80mm * 1000mm * 2000mm are used as slabs for welding steel ingot mold 4, Clean, degrease and dry the surface of the slab according to figure 1 and figure 2 As shown, a rolling slab with a size of 80mm * 1000mm * 2000mm is used as the mold bottom of the ingot mold 4, and two rolling slabs with a size of 80mm * 1000mm * 2400mm are used to make the side of the ingot mold 4, and four A rolled slab with a size of 80mm×1000mm×2400mm is...

Embodiment 3

[0046] A method for integrated composite casting of a large alloy steel ingot with a mold core, taking a downcast steel casting method and pouring and preparing a 90-ton large Q345B steel ingot under a protective atmosphere as an example, the steps of the method are as follows:

[0047] a. If Figure 1-Figure 3 and Figure 5-Figure 6 As shown, select two rolled slabs with qualified quality Q345B, with a size of 100mm×1500mm×3200mm, two rolled slabs with a size of 100mm×2000mm×3200mm and a rolled slab with a size of 150mm×2000mm×1700mm A piece of slab is used as a slab for welding steel ingot mold 4, and the surface of the slab is cleaned, degreased, and dried according to figure 1 and figure 2 As shown, a rolling slab with a size of 150mm * 2000mm * 1700mm is used as the bottom of the ingot mold 4, and two rolling slabs with a size of 100mm * 1500mm * 3200mm are used to make the sides of the ingot mold 4. A rolled slab with a size of 100mm×2000mm×3200mm is used as the fron...

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Abstract

The invention discloses a method for compositely casting large-scale alloy steel ingots with integrated mold cores, which can prepare large-scale alloy steel ingots of various tonnages under the condition of canceling cast iron ingot molds. The steps of the method include: selecting qualified continuous casting slabs, rolling slabs or forged slabs to make steel ingot molds; selecting quality qualified continuous casting slabs, rolling slabs, forging slabs or cast small steel ingots Composite steel core; assembly and sealing of steel ingot mold and steel core; preheating steel core and steel ingot mold; casting composite; cooling of composite steel ingot. The present invention uses conventional rolled slabs, forged slabs or continuous casting slabs to weld to make steel ingot molds, and combines them with metal melts to be cast to form composite steel ingots, which can improve the surface quality of steel ingots; adopt continuous casting slabs, Rolled slabs, forged slabs or small steel ingots that have been cast as steel cores to be compounded can completely eliminate defects such as loose cores, pores and inclusions in the cores of steel ingots, and further improve the core quality of steel ingots.

Description

technical field [0001] The invention relates to a method for preparing an alloy steel ingot, which belongs to the field of composite casting of metal materials, in particular to a method for composite casting of a large alloy steel ingot with integrated mold cores. Background technique [0002] At present, the production methods of large steel ingots are still dominated by ordinary die casting and electroslag remelting. When using ordinary mold casting method to produce large steel ingots, it is necessary to pour molten steel into cast iron ingot molds for cooling and solidification, which consumes a large amount of cast iron ingot molds and increases production costs. In addition, when ordinary die-casting steel ingots, as the ingot shape increases, the solidification speed of molten steel in the mold slows down, which brings a series of quality problems, such as various segregation intensification, porosity and shrinkage cavity increase, abnormal The increase in metal inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/06B22D19/16
Inventor 井玉安于涛张亚樵代自莹张磊罗德维
Owner 佛山市盛泽泓精密机械有限公司
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