Method for manufacturing bimetal composite wear resistant tube through centrifugal molding double fluids

A technology of centrifugal casting and manufacturing method, which is applied in the field of double-liquid centrifugal casting to manufacture bimetal composite wear-resistant pipes. The effect of safety and long service life

Inactive Publication Date: 2006-04-19

XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

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AI-Extracted Technical Summary

Problems solved by technology

[0002] In metallurgy, mining, electric power, petroleum, construction, coal and other industries, materials are transported through pipelines under pressure, and the pipelines are subjected to high pressure and severe wear, which brings very large economic losses to related enterprises. Because the pipe made of a single material cannot obtain the harmony of various mechanical properties such as wear resistance-weldability-impact resistance, the overall performance is poor, and it cannot meet the actual application conditions. Materials with different physical properties must be compounded. , in order to reflect the highest performance of various components, and obtain pipeline products with good comprehensive performance

In the current centrifugal casting method for bimetallic com...

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Abstract

A technology for manufacturing the antiwear bimetal tube by dual-liquid casting includes such steps as spraying graphite paint onto inner surface of a moulding pipe on centrifugal machine, baking, closing, high speed rotating while pouring molten steel, solidifying to become external steel tube, pouring molten antiwear alloy, solidifying, cooling and cleaning.

Technology Topic

Steel tubeWear resistant +4

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Examples

Experimental program(2)

Example Embodiment

[0022] Example 1:

[0023] Double-liquid centrifugal casting manufacturing method of bimetal composite wear-resistant pipe, see for process flow Figure 4 , See the structure diagram of the composite wear-resistant pipe during the manufacturing process figure 1 , Follow the steps below in sequence:

[0024] a) Coating preparation. The water-based graphite coating is prepared according to the volume ratio of water to graphite powder of 1:0.3~1.0, the particle size of graphite powder is generally 10~100um;

[0025] b) Spraying on the inner surface of the mold tube. Spray the prepared water-based graphite paint uniformly on the inner surface of the centrifuge mold tube 1, so that the bimetal composite wear-resistant tube can be pulled out of the centrifuge mold tube 1, and its thickness is 0.05-0.15mm;

[0026] c) Dry paint and mold tube encapsulation. Use flame to dry the paint on the inner surface of the mold tube; encapsulate both ends of the centrifuge mold tube 1, and the encapsulation process is carried out as usual;

[0027] d) Manufacture of outer sleeve. Molten steel is melted in an intermediate frequency furnace. The molten steel can be any of A3 steel, 16Mn steel, Q235 or other ordinary carbon steel; centrifugal casting, the molten steel is poured into a high-speed rotating centrifuge mold In tube 1, an outer tube 2 with a uniform wall thickness and a thickness of generally 2-10mm is made; after the outer tube cools for 1 to 5 minutes and solidifies,

[0028] e) Production of inner lining. Melting wear-resistant alloy, the wear-resistant alloy material can be selected from high chromium cast iron, nickel hard cast iron or other white cast iron; centrifugal casting, pour the melted wear-resistant alloy into the high-speed rotating outer tube 2 , Made into lined pipe 3 with a thickness of 2-15mm; after natural cooling,

[0029] f) Pull out to clean and make products. Disassemble the packaging at both ends of the centrifuge mold tube 1, pull out the bimetallic composite wear-resistant tube from the mold tube, and clean it to make a bimetallic composite wear-resistant tube product, see the product structure diagram figure 2 with image 3.

Example Embodiment

[0030] Example 2:

[0031] Manufacture the bimetal composite wear-resistant straight pipe with an inner diameter of Φ133mm, a length of 6m, and an inner lining thickness of 5mm. Process flow see Figure 4 , See the structure diagram of the composite wear-resistant pipe during the manufacturing process figure 1 , Follow the steps below:

[0032] a) Coating preparation. The water-based graphite coating is prepared according to the volume ratio of water to graphite powder of 1:0.5;

[0033] b) Spraying on the inner surface of the mold tube. Spray the prepared water-based graphite paint uniformly on the inner surface of the centrifuge mold tube 1, the thickness of which is about 0.1mm;

[0034] c) Dry paint and mold tube encapsulation. Use flame to dry the paint on the inner surface of the mold tube 1; and encapsulate the two ends of the centrifuge mold tube 1;

[0035] d) Manufacture of outer sleeve. Molten steel, melt A3 steel melt in an intermediate frequency furnace, and measure 0.014mm 3 A3 steel melt; centrifugal casting, the molten steel is poured into the high-speed rotating centrifuge mold tube 1, made into an A3 steel outer tube 2 with an inner diameter of Φ143, a thickness of 5mm, and a length of 6m; After the tube has cooled for 3 minutes and solidified,

[0036] e) Production of inner lining. Alloy smelting, smelt high chromium cast iron in an intermediate frequency furnace, measuring 0.013m 3 Wear-resistant alloy melt; centrifugal casting, the alloy melt is poured into the high-speed rotating outer sleeve 2 to obtain a wear-resistant alloy composite lining 3 with an inner diameter of Φ133mm, a length of 6m, and a thickness of 5mm; after natural cooling,

[0037] f) Pull out to clean and make products. Disassemble the packaging at both ends of the centrifuge mold tube 1, pull out the bimetallic composite wear-resistant tube from the mold tube, and clean it to make a bimetallic composite wear-resistant straight tube product, see the product structure diagram figure 2 with image 3.

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PUM

Property	Measurement	Unit
Thickness	0.05 ~ 0.15	mm
Particle size	10.0 ~ 100.0	µm
The inside diameter of	5.0 ~ 143.0	mm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Simple process
Strong combination

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Good thermal shock resistance Ensure safety Extended service life Graphite Materials science Alloy Molten steel

Method for manufacturing bimetal composite wear resistant tube through centrifugal molding double fluids

A technology of centrifugal casting and manufacturing method, which is applied in the field of double-liquid centrifugal casting to manufacture bimetal composite wear-resistant pipes. The effect of safety and long service life

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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