CN113737054A

CN113737054A - Copper alloy for oil cylinder lifting lug and production process thereof

Info

Publication number: CN113737054A
Application number: CN202110873068.0A
Authority: CN
Inventors: 李斌; 黄耀玲
Original assignee: Guangde Bolang Technology Co Ltd
Current assignee: Guangde Bolang Technology Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-03

Abstract

The invention discloses a copper alloy for an oil cylinder lifting lug and a production process thereof, wherein the copper alloy comprises the following elements in parts by weight: 32-40 wt% of zinc, 0.5-1.5 wt% of aluminum, 0.5-1.5 wt% of iron, 0.5-2 wt% of manganese, 0.02-0.04 wt% of bismuth, 0.1-1.5 wt% of nickel and the balance of copper.

Description

Copper alloy for oil cylinder lifting lug and production process thereof

Technical Field

The invention relates to the technical field of copper alloy, and particularly belongs to copper alloy for an oil cylinder lifting lug and a production process thereof.

Background

The existing copper bearing for the oil cylinder lifting lug is widely applied to aluminum bronze and common brass, and the aluminum bronze and the common brass have excellent lubricating and impact resistance properties and are widely used. However, the existing copper alloy has the defects that the wear resistance of aluminum bronze is not enough, or impact damage caused by insufficient elongation of the material and lead content which is not environment-friendly exist in the using process. Therefore, the development of a copper-based alloy which is corrosion-resistant, wear-resistant, impact-resistant, has satisfactory performance and relatively low cost is the direction of effort of those skilled in the art, and the inventors have made extensive efforts by relying on many years of experience in the field to provide a copper-based alloy material which can overcome the above disadvantages.

Disclosure of Invention

The invention aims to provide a copper alloy for an oil cylinder lifting lug and a production process thereof, and overcomes the defects of the prior art.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

the copper alloy for the oil cylinder lifting lug comprises the following elements in proportion: 32-40 wt% of zinc, 0.5-1.5 wt% of aluminum, 0.5-1.5 wt% of iron, 0.5-2 wt% of manganese, 0.02-0.04 wt% of bismuth, 0.1-1.5 wt% of nickel and the balance of copper.

Preferably, the following elements are included: 36-38 wt% of zinc, 0.8-1.2 wt% of aluminum, 1.3-1.5 wt% of iron, 1-1.5 wt% of manganese, 0.028 wt% of bismuth, 1.0-1.2 wt% of nickel, and the balance of copper.

Preferably, the following elements are included: 36.7 wt% zinc, 1.06 wt% aluminum, 1.43 wt% iron, 1.37 wt% manganese, 0.028 wt% bismuth, 1.0 wt% nickel, and the balance copper.

The production process of the copper alloy comprises the following steps:

weighing zinc, aluminum, iron, manganese, bismuth, nickel and copper according to the weight parts, mixing the iron and the nickel, heating and melting the mixture under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing the mixture, and cooling the mixture to room temperature to obtain a modified alloy;

heating copper in a vacuum melting furnace with the vacuum degree of less than 1Pa to 1245-.

Compared with the prior art, the invention has the following implementation effects:

the invention greatly reduces the content of bismuth, reduces the production cost and simultaneously improves the hardness and the durability of the copper alloy by improving the iron content in the copper alloy and matching with the use of nickel element; according to the invention, by adding more than 0.5 wt% of iron and forming the modified alloy by iron, nickel and bismuth, the problem of dezincification corrosion of the copper alloy after the iron content is increased is inhibited under the action of dendrite formed by the modified alloy, and meanwhile, under the action of dendrite of the modified alloy, the number of dislocation and lattice defects in the copper alloy is increased, and the hardness of the copper alloy is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Weighing 32 wt% of zinc, 0.5 wt% of aluminum, 0.5 wt% of iron, 0.5 wt% of manganese, 0.02 wt% of bismuth, 0.1 wt% of nickel and the balance of copper according to weight percentage, mixing the iron and the nickel, heating and melting under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing, and cooling to room temperature to obtain the modified alloy.

Then, heating copper in a vacuum melting furnace with the vacuum degree of less than 1Pa to 1245 ℃, adding manganese, uniformly mixing until the manganese is completely melted, cooling to 1083 ℃, then adding the modified alloy, uniformly mixing and stirring, then adding zinc and aluminum, cooling to 850 ℃ at the speed of 10 ℃/min while stirring, preserving the temperature for 2 hours to fully grow dendritic crystals of the modified alloy, and casting ingots after cooling to obtain the copper alloy with the Vickers hardness of 336HW and the tensile strength of 742 MPa.

Example 2

Weighing 40 wt% of zinc, 1.5 wt% of aluminum, 1.5 wt% of iron, 2 wt% of manganese, 0.04 wt% of bismuth, 1.5 wt% of nickel and the balance of copper according to weight percentage, mixing the iron and the nickel, heating and melting under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing, and cooling to room temperature to obtain the modified alloy.

Then, heating copper in a vacuum melting furnace with the vacuum degree of less than 1Pa to 1350 ℃, adding manganese, uniformly mixing until the manganese is completely melted, cooling to 1100 ℃, then adding the modified alloy, uniformly mixing and stirring, then adding zinc and aluminum, cooling to 950 ℃ at the speed of 10 ℃/min while stirring, preserving heat for 1h to fully grow dendritic crystals of the modified alloy, and casting ingots after cooling to obtain the copper alloy with the Vickers hardness of 347HW and the tensile strength of 739 MPa.

Example 3

Weighing 38 wt% of zinc, 0.8 wt% of aluminum, 0.9 wt% of iron, 1.4 wt% of manganese, 0.028 wt% of bismuth, 0.7 wt% of nickel and the balance of copper according to weight percentage, mixing the iron and the nickel, heating and melting under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing, and cooling to room temperature to obtain the modified alloy.

Then, heating copper in a vacuum melting furnace with the vacuum degree of less than 1Pa to 1250 ℃, adding manganese, uniformly mixing until the manganese is completely melted, cooling to 1090 ℃, then adding the modified alloy, uniformly mixing and stirring, then adding zinc and aluminum, cooling to 860 ℃ at the speed of 10 ℃/min under stirring, preserving heat for 2 hours to fully grow dendritic crystals of the modified alloy, and casting ingots after cooling to obtain the copper alloy with the Vickers hardness of 366HW and the tensile strength of 760 MPa.

Example 4

Weighing 36 wt% of zinc, 0.8 wt% of aluminum, 1.3 wt% of iron, 1 wt% of manganese, 0.03 wt% of bismuth, 1.0 wt% of nickel and the balance of copper according to weight percentage, mixing the iron and the nickel, heating and melting under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing, and cooling to room temperature to obtain the modified alloy.

Then, heating copper in a vacuum smelting furnace with the vacuum degree of less than 1Pa to 1300 ℃, adding manganese, uniformly mixing until the manganese is completely melted, cooling to 1100 ℃, then adding the modified alloy, uniformly mixing and stirring, then adding zinc and aluminum, cooling to 890 ℃ at the speed of 10 ℃/min while stirring, preserving heat for 3 hours to fully grow dendritic crystals of the modified alloy, and casting ingots after cooling to obtain the copper alloy with the Vickers hardness of 369HW and the tensile strength of 757 MPa.

Example 5

Weighing 38 wt% of zinc, 1.2 wt% of aluminum, 1.5 wt% of iron, 1.5 wt% of manganese, 0.035 wt% of bismuth, 1.2 wt% of nickel and the balance of copper according to weight percentage, mixing the iron and the nickel, heating and melting under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing, and cooling to room temperature to obtain the modified alloy.

Then, heating copper in a vacuum melting furnace with the vacuum degree of less than 1Pa to 1320 ℃, adding manganese, uniformly mixing until the manganese is completely melted, cooling to 1090 ℃, then adding the modified alloy, uniformly mixing and stirring, then adding zinc and aluminum, cooling to 920 ℃ at the speed of 10 ℃/min under stirring, preserving heat for 2 hours to enable dendritic crystals of the modified alloy to fully grow, and casting ingots after cooling to obtain the copper alloy with the Vickers hardness of 362HW and the tensile strength of 749 MPa.

Example 6

Weighing 36.7 wt% of zinc, 1.06 wt% of aluminum, 1.43 wt% of iron, 1.37 wt% of manganese, 0.028 wt% of bismuth, 1.0 wt% of nickel and the balance of copper according to weight percentage, mixing the iron and the nickel, heating and melting under the vacuum condition that the vacuum degree is less than 1Pa, adding the bismuth, uniformly mixing, and cooling to room temperature to obtain the modified alloy.

Then, heating copper in a vacuum melting furnace with the vacuum degree of less than 1Pa to 1260 ℃, adding manganese, uniformly mixing until the manganese is completely melted, cooling to 1095 ℃, then adding the modified alloy, uniformly mixing and stirring, then adding zinc and aluminum, cooling to 870 ℃ at the speed of 10 ℃/min while stirring, preserving heat for 3 hours to fully grow dendritic crystals of the modified alloy, and casting ingots after cooling to obtain the copper alloy with the Vickers hardness of 374HW and the tensile strength of 768 MPa.

Comparative example 1

The difference from example 1 is that the iron content is 0.3%, the resulting copper alloy has a Vickers hardness of 231HW and a tensile strength of 308 MPa.

Comparative example 2

The difference from example 1 is that the iron content is 2.0%, and the resulting copper alloy has a Vickers hardness of 273HW and a tensile strength of 284 MPa.

Comparative example 3

The difference from example 1 is that the copper alloy obtained with a nickel content of 0% has a Vickers hardness of 218HW and a tensile strength of 542 MPa.

Comparative example 4

The difference from the embodiment 1 is that the temperature holding time at 800 ℃ of 720-.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The copper alloy for the oil cylinder lifting lug is characterized by comprising the following elements in proportion: 32-40 wt% of zinc, 0.5-1.5 wt% of aluminum, 0.5-1.5 wt% of iron, 0.5-2 wt% of manganese, 0.02-0.04 wt% of bismuth, 0.1-1.5 wt% of nickel and the balance of copper.

2. The copper alloy for the oil cylinder lifting lug according to claim 1, which is characterized by comprising the following elements in percentage by weight: 36-38 wt% zinc, 0.8-1.2 wt% aluminum, 1.3-1.5 wt% iron, 1-1.5 wt% manganese, 0.025-0.03 wt% bismuth, 1.0-1.2 wt% nickel, and the balance copper.

3. The copper alloy for the oil cylinder lifting lug according to claim 1, which is characterized by comprising the following elements in percentage by weight: 36.7 wt% zinc, 1.06 wt% aluminum, 1.43 wt% iron, 1.37 wt% manganese, 0.028 wt% bismuth, 1.0 wt% nickel, and the balance copper.