High-strength corrosion-resistant micro-alloying copper pipe and manufacturing method thereof

A technology of microalloying and manufacturing methods, applied in the field of copper alloy tube materials, can solve the problems of affecting material heat transfer efficiency, high processing cost, low plasticity, etc., to improve matrix strength and corrosion resistance, improve ductility and thermal conductivity properties, improving strength and heat resistance

Active Publication Date: 2014-06-18
NINGBO JINTIAN COPPER TUBE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of them can achieve comprehensive properties such as high strength, corrosion resistance, and high efficiency.
A copper alloy tube for heat exchanger as proposed in patent 201110174411.9, its composition: Sn0.5-1.0 wt%, P0.05-0.1 wt%, Al2.2-8.5 wt%, Mn0.5-1.8 wt%, Fe0 .15-0.35 wt%, the balance is composed of copper and unavo

Method used

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  • High-strength corrosion-resistant micro-alloying copper pipe and manufacturing method thereof

Examples

Experimental program
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Example Embodiment

[0015] Example 1

[0016] Composition content: phosphorus is 0.005wt%, tin is 0.3wt%, lanthanum is 0.008wt%, nickel is 0.1wt%, zinc is 0.05wt%, manganese is 0.05wt%, and the balance is copper.

[0017] The manufacturing method of microalloyed copper tube includes the following steps:

[0018] a. Weigh according to the composition formula of the microalloyed copper pipe material, and then add electrolytic copper, electrolytic nickel, electrolytic manganese, phosphor-copper alloy, rare earth lanthanum, zinc ingot and tin ingot to a power frequency induction electric furnace for heating and smelting;

[0019] b. Charcoal cover is used for smelting. The smelting temperature is 1150~1250℃. After all the metal is melted, keep it for 5~50 minutes, and then carry out horizontal drawing casting. The casting speed is 150~360mm / min. The casting temperature is 1100~1200℃. The temperature is 40~80℃, drawn into Φ92×25mm copper alloy ingot for later use;

[0020] c. Use a three-roll planetary rolling...

Example Embodiment

[0026] Example 2

[0027] Composition content: phosphorus is 0.018wt%, tin is 0.5wt%, cerium is 0.009wt%, cobalt is 0.2wt%, manganese is 0.05wt%, and the balance is copper.

[0028] The manufacturing method of microalloyed copper tube includes the following steps:

[0029] a. Weigh according to the composition formula of the microalloyed copper pipe material, and then add electrolytic copper, electrolytic manganese, electrolytic cobalt, phosphor-copper alloy, rare earth cerium, zinc ingot and tin ingot into a power frequency induction electric furnace for heating and smelting;

[0030] b. The smelting adopts charcoal covering smelting, the smelting temperature is 1150~1250℃, after all the metal is melted, the temperature is kept for 5~50 minutes, and then horizontal drawing casting is carried out. The casting speed is 150~360mm / min, and the casting temperature is 1100~1200℃. The outlet temperature is 40~80℃, drawn into Φ92×25 copper alloy ingot for use;

[0031] c. Use a three-roll pla...

Example Embodiment

[0037] Example 3

[0038] Composition content: Phosphorus is 0.025wt%, tin is 0.8wt%, lanthanum is 0.005wt%, cerium is 0.005wt%, zirconium is 0.01wt%, and the balance is copper.

[0039] The manufacturing method of microalloyed copper tube includes the following steps:

[0040] a. Weigh according to the composition formula of the microalloyed copper tube material, and then add electrolytic copper, phosphor-copper alloy, zirconium-copper alloy, rare earth lanthanum and cerium, zinc ingots and tin ingots to the electromagnetic stirring power frequency induction electric furnace in order for heating and smelting;

[0041] b. The smelting adopts charcoal covering smelting, the smelting temperature is 1150~1250℃, after all the metal is melted, the temperature is kept for 5~50 minutes, and then horizontal drawing casting is carried out. The casting speed is 150~360mm / min, and the casting temperature is 1100~1200℃. The outlet temperature is 40~80℃, drawn into Φ92×25 copper alloy ingot for us...

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Abstract

The invention discloses a high-strength corrosion-resistant micro-alloying copper pipe material which consists of the following components in percentage by weight: 0.005-0.04% of phosphorus, 0.2-1.0% of tin, 0-0.04% of lanthanum, 0-0.04% of cerium, 0-0.1% of nickel, 0-0.1% of zinc, 0-0.05% of cobalt, 0-0.1% of manganese, 0-0.05% of zirconium and the balance of copper. By combining phosphorus with rare earth lanthanum and/or cerium to obtain a deoxidizer of molten copper, the content of oxygen in melt is further reduced, the grain structure is refined, the recrystallization temperature is increased to prevent abnormal growth of the weld structure grain, and the ductility and thermal conductivity of copper are further improved. Through solid solution strengthening of tin and improvement of an oxide film on a surface layer, the strength and corrosion resistance of a matrix are improved. By adding trace amount of zinc, nickel and manganese subjected to solid solution into the copper matrix, the strength of the copper matrix is improved; by adding cobalt or zirconium and dispersing into the copper matrix, the strength and heat resistance of the copper matrix are improved; the combination effect is better than the performance and using effect of the existing oxygen-free copper pipe or single phosphorus deoxidization copper pipe.

Description

technical field [0001] The invention relates to a copper alloy tube material, in particular to a microalloyed copper tube material and a manufacturing method thereof. Background technique [0002] Copper alloy has good heat transfer, corrosion resistance and other characteristics, and is widely used in heat exchangers, such as air conditioners, water heaters and other fields. At present, the materials used for heat exchangers are mostly oxygen-free copper tubes or phosphorus deoxidized copper tubes (TP2), but when serving in special environments, such as high pressure and corrosive environments, ordinary TP2 or oxygen-free copper tubes cannot meet the service requirements. For example, during the welding process of TP2 copper pipes, due to the sharp increase in the temperature of the weld, recrystallization of the weld structure occurs, and the grains grow abnormally, resulting in low material strength in the welding heat-affected zone. When the critical pressure is in servi...

Claims

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Application Information

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IPC IPC(8): C22C9/02C22C1/03C22F1/08
Inventor 丁家圆黄绍辉巢国辉叶东皇
Owner NINGBO JINTIAN COPPER TUBE
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