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Casting system for vacuum induction melting of high-temperature alloy and casting method thereof

A technology of vacuum induction melting and casting system, applied in the direction of casting mold, casting mold composition, casting equipment, etc., can solve problems such as difficulty in accurately controlling casting speed and solidification temperature, affecting product quality, etc., to ensure stability and continuity , The effect of reducing impurity involvement and uniform flow

Active Publication Date: 2022-01-28
江苏奇纳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantage is that it is not easy to accurately control the casting speed and solidification temperature
At the same time, refractory material inclusions are easily brought into molten steel and affect product quality

Method used

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  • Casting system for vacuum induction melting of high-temperature alloy and casting method thereof
  • Casting system for vacuum induction melting of high-temperature alloy and casting method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] Design the size and diameter of the chute filter 2 in the casting system, the size of the lower outlet of the anti-vortex water outlet 3, the size and diameter of the zirconia honeycomb filter 5, and the diameter of the through hole of the diverter plate 6:

[0051] a. The size of the chute filter 2 is 130*100mm, the number of holes that can be used is 175, the hole diameter is φ4mm, and the cross-sectional area that the molten steel can pass is S 1 =Nπr 2 =175π*4≈2199mm 2 ≈22cm 2 , the effective cross-sectional area of ​​molten steel depends on the retention of molten steel in the chute 1 and the speed at which molten steel is poured out from the melting crucible;

[0052] b. The diameter of the outlet of the anti-swirl water outlet 3 is φ28mm, and the cross-sectional area through which the molten steel can pass is S if the anti-swirl boss is removed. 2 ≈4.9cm 2 ;

[0053] c. The zirconia honeycomb filter 5 is honeycomb-shaped, with a size of φ100*25mm, a pore dia...

Embodiment approach 2

[0058] Design the diameter of the through hole 9 of the distribution plate, taking the cast K 418 superalloy as an example, its density is ρ=8g / cm 3 .

[0059] a. Use a honeycomb zirconia honeycomb filter 5 with a size of φ100*25mm and a pore size of 15ppi. As calculated in Embodiment 1 above, the cross-sectional area of ​​the zirconia honeycomb filter 5 that can pass through molten steel is S 3 =4.6cm 2 ;

[0060] b. In order to ensure the stability and continuity of the molten steel poured into the mold steel pipe 8 during the casting process, the passing cross-sectional area S of the aperture of the splitter plate 6 4 3 ;

[0061] c. The cross-sectional area S of the molten steel in the unit casting unit on the splitter plate 6 4 =Nπr 2 =4*π*r 2 3 ,but

[0062] d. The pouring temperature ensures the lowest possible superheat, so that the molten steel has sufficient fluidity in the mold steel pipe 8 without affecting the surface quality of the ingot, and at the same...

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Abstract

The invention relates to the technical field of high-temperature alloy casting, and discloses a casting system for vacuum induction melting of high-temperature alloy and a casting method thereof.The casting system comprises a chute, a filtering disc and a flow dividing disc, a chute filtering piece is vertically arranged in the chute, the bottom end of the chute is communicated with an anti-vortex watering opening, and a zirconium oxide honeycomb filtering piece is embedded in the bottom end of the filtering disc. A mold set comprises mold steel pipes, a flow dividing disc, a filtering disc and a heat preservation box body. Before pouring, the mold set is preheated to the set temperature and kept at the set temperature for a certain time, and the chute is preheated and roasted till pouring; the molten steel is injected into the chute, overflows to the chute, sequentially enters the anti-vortex watering opening and the zirconium oxide honeycomb filter and then flows into the flow dividing disc, and is sequentially poured to the mold steel pipes. According to the invention, the design of the casting system is systematically improved. The flowing stability and cooling of the molten steel in the pouring process are controlled, and meanwhile, the solidification speed of metal in the mold steel pipes is restrained; the surface quality of a cast ingot is improved, secondary looseness of the center of the cast ingot is reduced, and the content of inclusions in a product is reduced.

Description

technical field [0001] The invention relates to the technical field of smelting and casting of high-temperature alloys and other special non-ferrous metal alloys, in particular to a casting system and a casting method for vacuum induction melting of high-temperature alloys. Background technique [0002] Cast superalloys are generally melted by vacuum induction, and then cast into round billets with a diameter of 40-90mm, which are used by precision casting users. The customer's key quality requirements for the billet include: surface quality, internal center shrinkage cavity, and inclusion content. Vacuum refining process, raw material composition and other factors all affect the quality of the product, but the casting process in the later stage of smelting is often the key to determine the quality of the product: [0003] 1) It is necessary to accurately control the pouring temperature and the temperature change in the process according to the solidification temperature of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06B22C9/08B22C9/22B22D27/04B22D41/50B22D43/00
CPCB22C9/086B22D41/50B22C9/082B22C9/22B22C9/065B22D27/04Y02P10/25
Inventor 张郁亭彭伟平王超薛丹斌周志坚
Owner 江苏奇纳新材料科技有限公司
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