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Centrifugal casting method of stainless steel sealing rings

A technology of centrifugal casting and sealing ring, which is applied in the field of casting, can solve the problems of many casting defects and poor compactness of castings, and achieve the effects of compact structure, cost saving and good metallurgical quality

Active Publication Date: 2013-01-02
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The castings produced by sand casting have poor compactness and many casting defects, which cannot meet the requirements of the above products

Method used

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  • Centrifugal casting method of stainless steel sealing rings
  • Centrifugal casting method of stainless steel sealing rings
  • Centrifugal casting method of stainless steel sealing rings

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0043] Casting material: duplex stainless steel casting weight 300Kg

[0044] Casting allowance: 6-8mm for the outer, upper and lower surfaces, and 20-40mm for the inner surface.

[0045] Centrifuge speed: 500 rpm

[0046] Pouring temperature: 1520°C--1540°C

[0047] Casting coating: 60% zircon powder + 40% silica sol (weight ratio)

[0048] Pouring system: runner diameter ф50mm, measuring direction elongation 100mm

[0049] Pouring time: 15-25 seconds

example 2

[0051] Casting material: Martensitic stainless steel Casting weight 350Kg

[0052] Casting allowance: 6-8mm for the outer, upper and lower surfaces, and 20-40mm for the inner surface.

[0053] Centrifuge speed: 550 rpm

[0054] Pouring temperature: 1580°C--1590°C

[0055] Casting coating: 60% zircon powder + 40% silica sol (weight ratio)

[0056] Pouring system: runner diameter ф50mm, measuring direction elongation 80mm

[0057] Pouring time: 18-28 seconds.

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Abstract

The invention belongs to the technical field of casting and relates to a centrifugal casting method of stainless steel sealing rings. The centrifugal casting method provided by the invention comprises the following steps of: planning a pouring temperature of vertical centrifugal casting, designing a pouring system and controlling the pouring process to obtain a sealing ring casting with dense tissue and good metallurgical quality. The percent of pass of the castings of the vertical centrifugal casting technique is improved by 20-30%, and the labor cost is saved. Only the cost of the castings of the vertical centrifugal casting technique is saved by **RMB each year.

Description

technical field [0001] The invention belongs to the technical field of casting and relates to a centrifugal casting method of a stainless steel sealing ring. Background technique [0002] Centrifugal casting is divided into vertical centrifugal casting and horizontal centrifugal casting. Both methods are a process in which the high-temperature alloy liquid is injected into the mold under high-speed rotation, and the alloy liquid is solidified and formed under the action of centrifugal force. The traditional horizontal centrifugal casting is mainly used for the production of tubular castings with low quality requirements, and the shapes of the produced castings are mainly standard circular castings. Vertical centrifugal casting is currently mainly used in the production of bimetallic rolls, and only partially machined and used as wear-resistant parts. [0003] For ring-shaped castings with external flanges, the structural dimensions of typical castings are shown in Figure 1...

Claims

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Application Information

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IPC IPC(8): B22D13/04B22D13/12
Inventor 李海宁张文军曹智勇王立恒
Owner AECC AVIATION POWER CO LTD
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