Flange preparation method based on three-plate mold

A three-plate mold and flange technology is applied in the field of casting, which can solve the problems of reducing the oxidative components of the alloy and easily generating pores, and achieve the effect of improving the quality and performance.

Inactive Publication Date: 2020-05-05
苏州利达铸造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process uses sand molds, which are usually only suitable for smaller sizes (such as the case where the inner diameter of the flange body 1 is less than or equal to 15cm)
When the inner diameter of the flange body 1 is greater than or equal to 25 cm, it is difficult to reduce the oxidative components in the alloy by the above method due to the increase in the length of the flow channel, and it is also easy to generate pores

Method used

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  • Flange preparation method based on three-plate mold

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Embodiment 1

[0013] This embodiment provides a method for preparing a flange based on a three-plate mold. The flange contains the following components in mass content, C: 0.5-0.6%, Ni: 0.05-0.2%, Al: 2-4%, Mo: 0.3- 0.4%, Cr: 0.3-0.4%, V: 5-8%, Zn: 0.28-3.0%, Ti: 0.03-0.06%, and the rest are Fe and other unavoidable impurities;

[0014] Its preparation method comprises the following steps:

[0015] (a) The above-mentioned raw materials are weighed in proportion and reset in a melting furnace, and overheated and melted at 1450-1500°C in an argon atmosphere to obtain an alloy melt; the alloy melt is cooled to 1350-1400°C, and introduced into In the nodulizing bag of the agent and iron filings; the vermicularizing agent and the iron filings are arranged sequentially from bottom to top in the nodularizing bag, and the mass of the vermicularizing agent is 0.8-1% of the mass of the alloy melt;

[0016] (b) Inject the spheroidized molten alloy into the mold cavity of a three-plate mold, and then ...

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Abstract

The invention relates to a flange preparation method based on a three-plate mold. The flange preparation method comprises the following steps of (a) weighing raw material in proportion, placing in a smelting furnace, and performing overheating melting at 1450-1500 DEG C in an argon atmosphere to obtain alloy molten liquid; cooling the alloy molten liquid to 1350-1400 DEG C, and introducing the alloy molten liquid into a spheroidizing ladle containing a vermiculizer and scrap iron; the vermiculizer and the scrap iron are sequentially arranged in the spheroidizing ladle from bottom to top, and the mass of the vermiculizer is 0.8%-1% of that of the alloy molten liquid; (b) injecting the spheroidized alloy molten liquid into a three-plate mold cavity, and carrying out low-pressure casting to obtain a casting blank; and the three-plate mold is formed by splicing three mold plates which are sequentially arranged from left to right, and each mold plate is provided with an alloy molten liquidinjection opening. Therefore, the flow of molten liquid can be effectively reduced, the contact time of the alloy molten liquid and oxygen is shortened, and the quality of castings is improved.

Description

technical field [0001] The invention belongs to the field of casting, and relates to a method for preparing a flange, in particular to a method for preparing a flange based on a three-plate mold. Background technique [0002] Such as figure 1 The shown flange includes a flange body 1, a groove 3 formed on the inner surface of the flange body 1, a plurality of waist-shaped holes 6 provided on the flange body 1 and penetrating through its inner and outer surfaces, A plurality of mounting holes 2 provided on the end surface of the flange body 1 and passing through it, and a plurality of through holes 5 provided on the flange body 1 and passing through its inner and outer surfaces, the through holes 5 and the waist-shaped holes 6 are spaced apart set up. When manufacturing the flange, it is necessary to obtain the flange casting with machining allowance first, and obtain the finished product after machining. However, due to the different flange specifications (mainly differen...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C38/44C22C38/46C22C38/50C22C33/04B22D18/04
CPCB22D18/04C22C33/04C22C38/002C22C38/06C22C38/44C22C38/46C22C38/50
Inventor 季吉清
Owner 苏州利达铸造有限公司
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