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Centrifugal casting method of chromium-containing high silicon cast iron anode tube

A high-silicon cast iron and centrifugal casting technology, which is applied in the production of cathodic protection materials for underground steel facilities, can solve problems such as poor product performance and uneven wall thickness, and achieve the effects of no pores, high yield, and improved internal structure.

Inactive Publication Date: 2013-06-12
QINGDAO YOUCHANG ANTI CORROSION LIGHTNING PROTECTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of uneven wall thickness and poor product performance of sand-type and metal-type casting high-silicon cast iron anode tubes containing chromium, the invention invented a centrifugal casting high-silicon cast iron anode tube technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1, Get 142 kilograms of silicon, 32.5 kilograms of chromium, 7 kilograms of carbon, 1 kilogram of copper, 817.5 kilograms of iron, and 1000 kilograms of ingredients;

[0015] For smelting, the raw materials are added to the smelting furnace for smelting for 60 minutes, and when the temperature of the melt reaches 1400 degrees Celsius, it is transferred to the refining furnace;

[0016] Refining, when the refining furnace reaches 1420 degrees Celsius, add 0.3% rare earth silicon alloy as raw material, and the temperature rises to 1450 degrees Celsius for pouring;

[0017] For pouring, control the speed of the centrifuge at 1800--2500 rpm. After the pouring and feeding are completed, the centrifuge will continue to stop for 1 minute;

[0018] The mold is released, and the casting is cooled to 1000 degrees Celsius to release the mold;

[0019] Heat preservation and tempering, put the castings out of the mold into the heat preservation furnace, control the furnace...

Embodiment 2

[0020] Example 2, Prepare 295 kg of silicon, 100 kg of chromium, 22 kg of carbon, 10 kg of copper, 1573 kg of iron, and 2000 kg of ingredients;

[0021] For smelting, put the raw materials into the smelting furnace and smelt for 50 minutes, and transfer to the refining furnace when the temperature of the melt reaches 1400 degrees Celsius;

[0022] Refining, when the refining furnace reaches 1420 degrees Celsius, add 0.3% rare earth silicon alloy as raw material, and the temperature rises to 1450 degrees Celsius for pouring;

[0023] For pouring, control the speed of the centrifuge at 1800--2500 rpm. After the pouring and feeding are completed, the centrifuge will continue to stop for 1 minute;

[0024] Release the mold, and the casting is cooled to 1050 degrees Celsius to release the mold;

[0025] Heat preservation and tempering, put the castings out of the mold into the heat preservation furnace, control the temperature of the furnace at 1000-1020 degrees Celsius, keep th...

Embodiment 3

[0026] Example 3, Get 435 kg of silicon, 120 kg of chromium, 27 kg of carbon, 9 kg of copper, 2409 kg of iron, and 3000 kg of ingredients;

[0027] For smelting, the raw materials are added to the smelting furnace for smelting for 55 minutes, and when the temperature of the melt reaches 1400 degrees Celsius, it is transferred to the refining furnace;

[0028] Refining, when the refining furnace reaches 1420 degrees Celsius, add 0.3% of the raw material rare earth silicon alloy, and the temperature rises to 1430 degrees Celsius for pouring;

[0029] For pouring, control the speed of the centrifuge at 1800--2500 rpm. After the pouring and feeding are completed, the centrifuge will continue to stop for 1 minute;

[0030] The mold is released, and the casting is cooled to 1000 degrees Celsius to release the mold;

[0031] Heat preservation and tempering, put the castings out of the mold into the heat preservation furnace, control the temperature of the furnace at 1000-1020 degr...

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PUM

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Abstract

The invention relates to a centrifugal casting method of a chromium-containing high silicon cast iron anode tube. The centrifugal casting method is characterized by comprising the steps: preparing, smelting, refining, pouring, mold stripping, insulating and fire returning, specifically, preparing raw materials in percentage by weight: 14.2-14.75% of silicon, 3.25-5% of chromium, 0.7-1.1% of carbon, 0.1-0.5% of copper, and 78.65-81.75% of iron according to the proportion; smelting the raw materials for 50-60 minutes, refining after the temperature of the melt achieves 1400 DEG C, adding 0.3% of rare earth-silicon alloy when the interior of a refining furnace achieves 1420 DEG C, and pouring when the temperature achieves 1450 DEG C; controlling a centrifugal machine at 1800-2500 turns / minute; conducting cast cooling at 1000-1050 DEG C for stripping a mold; filling a cast into a holding furnace, controlling the furnace temperature to be 1000-1020 DEG C, holding the temperature for 60 minutes, conducting natural cooling for baking along with the furnace. The problems that sand type and metal type cast chromium-containing high silicon cast iron anode tubes are uneven in wall thickness and poor in product property, and the centrifugal casting method is best technology for producing the chromium-containing high silicon cast iron anode tubes.

Description

[0001] technical field [0002] The invention relates to the technical field of production of cathodic protection materials for underground iron and steel facilities, specifically a chromium-containing high-silicon material specially used for anti-corrosion protection of oil and gas steel pipelines, storage tanks, power supply pipe networks, and underground steel structures. Casting methods for cast iron anode tubes. Background technique [0003] At present, the chromium-containing high-silicon cast iron anode tubes used in the society are all made of sand mold or metal mold. The disadvantages are that the product wall thickness is uneven, the performance is poor, and the production cost is high. Contents of the invention [0004] In order to solve the problems of uneven wall thickness and poor product performance of sand-type and metal-type cast high-silicon cast iron anode tubes containing chromium, the invention invents a centrifugal casting high-silicon cast iron anode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/06C22C33/08B22D13/02C21D5/00
Inventor 国世毅国立强姜修堂
Owner QINGDAO YOUCHANG ANTI CORROSION LIGHTNING PROTECTION MATERIAL
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