Combined smelting device capable of increasing yield of alloy castings and application of combined smelting device

A technology for alloy castings and melting equipment, which is applied in the fields of vacuum induction melting and investment casting, can solve the problems of increasing material waste, shrinkage of solidified structures, and increasing the amount of material used, so as to improve the yield, reduce waste and save manpower. Effect

Active Publication Date: 2018-07-20
江苏隆达超合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the preparation of precision castings, defects in as-cast structures and low yields are often encountered.
Especially during the solidification process, alloys with a large shrinkage rate are prone to shrinkage of the solidified structure caused by insufficient fee...

Method used

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  • Combined smelting device capable of increasing yield of alloy castings and application of combined smelting device
  • Combined smelting device capable of increasing yield of alloy castings and application of combined smelting device
  • Combined smelting device capable of increasing yield of alloy castings and application of combined smelting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] As shown in Figure 1, the combined smelting equipment for improving the yield of alloy castings includes a crucible 1 for primary smelting, an ingot mold 2 for primary smelting, a crucible 3 for secondary smelting and a precision casting mold shell 4 for secondary smelting; The crucible 1 and the crucible 3 for secondary melting have the same structure;

[0041] The ingot mold 2 for the primary smelting comprises a frock 2-1, a diverter plate 2-2, an insulating cotton 2-3, an insulating riser 2-4, an ingot mold body 2-5 and a graphite base plate 2-6; the diverter plate The lower end of 2-2 is provided with insulation riser 2-4, insulation cotton 2-3 is provided between diverter plate 2-2 and insulation riser 2-4, insulation riser 2-4 is arranged above ingot mold body 2-5 The outside of the ingot mold body 2-5 is provided with tooling 2-1; the bottom of the ingot mold body 2-5 is provided with a graphite base plate 2-6; the ingot mold body 2-5 can be a ductile iron ingot...

Embodiment 2

[0049] Put 50kg of prepared nickel-copper alloy raw materials into a 50kg vacuum induction furnace to melt and cast them into master alloy ingots. The 25kg vacuum induction melting furnace requires 25kg of ingot raw materials to prepare castings. According to the amount of mold shell material used for precision casting and the size of the 25kg vacuum furnace melting crucible, the size (including diameter and length) of the master alloy ingot is reversed.

[0050] A 25kg vacuum induction furnace needs 18-20kg of materials for precision pouring. The shape of the crucible is shown in Figure 1. The diameter of the crucible is 140mm, the height is 320mm, and the radius of the arc at the bottom of the crucible is 70mm.

[0051] Taking the radius of the crucible as R and the radius of the master alloy ingot as r, then when 3 master alloy ingots are placed in a 25kg crucible, substituting n=3 into the formula, the maximum allowable radius of the master alloy is obtained as:

[0052] ...

Embodiment 3

[0057] Put 50kg of prepared nickel-copper alloy raw materials into a 50kg vacuum induction furnace to melt and cast them into ingots, and the 25kg vacuum induction melting furnace requires 25kg of ingot raw materials to prepare castings. According to the amount of mold shell material used for precision casting and the size of the 25kg vacuum furnace melting crucible, the size (including diameter and length) of the master alloy ingot is reversed.

[0058] The 25kg vacuum induction furnace needs 22-23kg of materials for precision casting, and the shape of the crucible is as follows: Figure 1-a As shown, the diameter of the crucible is 140mm, the height is 320mm, the radius of the arc at the bottom of the crucible is 70mm, the radius of the crucible is R, and the radius of the master alloy ingot is r, then when 4 master alloy ingots are placed in the 25kg crucible, Substituting n=4 into the formula, the maximum allowable master alloy radius is:

[0059]

[0060] R=70mm, r=28...

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Abstract

The invention relates to a combined smelting device capable of increasing the yield of alloy castings and application of the combined smelting device, and belongs to the technical field of vacuum induction melting and investment casting. A crucible used for primary smelting and an ingot mold used for primary smelting are matched to prepare mother alloy cast ingots in a vacuum induction furnace, the outer surface of each mother alloy cast ingot is polished, and riser parts are cut off; and afterwards, a crucible used for secondary smelting and a refined casting mold shell used for secondary smelting are used for investment casting in the vacuum induction furnace, and thus, a precision casting is obtained. According to the combined smelting device capable of increasing the yield of the alloycastings and the application of the combined smelting device, a distribution disc is adopted for a sprue for primary smelting so that multiple mother alloy ingots can be cast at a time, ingot molds with different sizes can be used and the number of the ingot molds can be selected according to the quantity of molten materials, and the size of the ingot molds is matched with that of the crucible for secondary smelting and the material quantity. On the one hand, material waste is reduced, and the yield of materials is increased; and on the other hand, axial enlarged areas are designed at the twoends connected with the precision casting, so that sufficient feeding of the precision casting is achieved at the later casting solidification stage, and casting defects such as shrinkage cavities and shrinkage porosities are reduced.

Description

technical field [0001] The invention relates to an ingot mold for improving the yield of high-silicon-nickel-copper alloy castings, a precision casting mold shell and an application thereof, belonging to the technical field of vacuum induction melting and investment casting. Background technique [0002] Vacuum induction melting is closely related to investment casting technology. For castings with high purity requirements, two or more meltings are required to improve their cleanliness. For multiple smelting, it involves the ingredients before the second or multiple smelting. If the size of the master alloy ingot prepared in the previous time is not conducive to the next smelting, it is necessary to cut the master alloy ingot. Cutting will cause serious waste of materials, especially in industrial production, cutting uses grinding wheels, which will cause a lot of waste of materials. [0003] Now many castings can be prepared by precision casting, and the prepared cast prod...

Claims

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Application Information

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IPC IPC(8): B22D7/06
Inventor 李淑苹浦益龙周向东浦海涌周小红
Owner 江苏隆达超合金股份有限公司
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