CN112267062A

CN112267062A - Iron alloy coupling and preparation method thereof

Info

Publication number: CN112267062A
Application number: CN202010920471.XA
Authority: CN
Inventors: 马志强; 张洁文; 翟长宽; 孔德文
Original assignee: Guangzhou Forging First Factory Co ltd
Current assignee: Guangzhou Forging First Factory Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-01-26

Abstract

The invention discloses an iron alloy coupling, which belongs to the field of alloy forging preparation, and comprises the following chemical components in percentage by weight: 3-5% of nickel, 4-6% of aluminum, 2-3% of copper, 0.5-0.8% of silver, 0-1% of carbon, 0-0.5% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder. The iron alloy coupler is prepared by adding micron-sized aluminum powder and nano-silver powder into raw materials, so that the components of the iron alloy coupler tend to form blocky micron-sized alloy with a uniform structure in the preparation process. Compared with the traditional iron alloy coupler, the iron alloy coupler has the advantages of higher strength, higher hardness and less possibility of being corroded. The invention also provides a preparation method of the ferroalloy coupling, which does not need additional surface modification and pre-alloying, and the prepared product has low impurity content and uniform components through one-time heating smelting and subsequent shaping, has simple preparation process and uniform product specification, and meets the industrial mass production standard.

Description

Iron alloy coupling and preparation method thereof

Technical Field

The invention belongs to the field of alloy forging preparation, and particularly relates to an iron alloy coupling and a preparation method thereof.

Background

The shaft coupling is used as a connecting part which is most commonly used for mechanical product shafting transmission, is usually used for connecting two shafts or a shaft and a rotating part, rotates together in the process of transmitting motion and power, and does not depart or change the rotating direction and the torque under normal conditions.

The performance of the coupling largely determines the stability and the transmission fluency of both the interlocking parts, so that the coupling is required to have the characteristics of high torque rigidity, high hardness, corrosion resistance and the like when in application. Because the shaft coupling can not carry out too much change according to the different its shapes of use part, can effectively promote the result of use of shaft coupling itself through the optimization on the raw materials to the shaft coupling preparation and the stability of product.

Disclosure of Invention

Based on the defects of the prior art, the invention aims to provide an iron alloy coupling and a preparation method thereof.

In order to achieve the purpose, the invention adopts the technical scheme that:

an iron alloy coupling comprises the following chemical components in percentage by weight: 3-5% of nickel, 4-6% of aluminum, 2-3% of copper, 0.5-0.8% of silver, 0-1% of carbon, 0-0.5% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder.

The iron alloy coupling provided by the invention takes the micron-sized aluminum powder and the nano silver powder as raw materials, so that components tend to form blocky micron-sized alloy with uniform structure in the preparation process; by limiting the composition of other elements, the finally prepared alloy coupling has higher strength, higher hardness and less corrosion compared with the traditional iron alloy coupling.

Preferably, the iron alloy coupling comprises the following chemical components in percentage by weight: 3.5 to 4.5% of nickel, 4.5 to 5.8% of aluminum, 2.2 to 2.7% of copper, 0.55 to 0.7% of silver, 0 to 1% of carbon, 0 to 0.5% of silicon, and the balance of iron and inevitable impurities. More preferably, the iron alloy coupling comprises the following chemical components in percentage by weight: 4% of nickel, 5% of aluminum, 2.5% of copper, 0.6% of silver, 0.5% of carbon, 0.25% of silicon, and the balance of iron and inevitable impurities. The ferroalloy coupling obtained under the limitation of the content elements has better use strength and corrosion resistance.

Preferably, the chemical composition of the iron alloy coupling also contains a small amount of oxygen and nitrogen, and the sum of the weight percentage of the oxygen and the nitrogen is less than 0.1 percent

The invention also aims to provide a preparation method of the ferroalloy coupling, which comprises the following steps:

(1) heating and smelting the raw materials in atmosphere protection, pouring the raw materials into a blank mold, sealing, exhausting and shaping, and cooling to obtain a blank ferroalloy; the smelting temperature is 1500-1800 ℃, and the smelting time is 2-3 h; the atmosphere is nitrogen;

(2) putting the blank ferroalloy obtained in the step (1) into a coupler mold for extrusion, and then processing into a target ferroalloy coupler; the machining includes surface cutting and drilling.

According to the preparation method of the ferroalloy coupler, the ferroalloy coupler is subjected to high-temperature sintering and twice die shaping, additional surface modification and pre-alloying are not needed, the impurity content in the product is low, the components are uniform, the preparation process is simple, the obtained coupler product is uniform in specification, and the coupler meets the industrial mass production standard.

The invention has the beneficial effects that the invention provides the ferroalloy coupler, and the ferroalloy coupler is prepared by adding micron-sized aluminum powder and nano-silver powder into raw materials, so that the components of the ferroalloy coupler tend to form blocky micron-sized alloy with uniform structure in the preparation process; by limiting the composition of other elements, the finally prepared alloy coupling has higher strength, higher hardness and less corrosion compared with the traditional iron alloy coupling. The invention also provides a preparation method of the ferroalloy coupling, which does not need additional surface modification and pre-alloying, and the prepared product has low impurity content and uniform components through one-time heating smelting and subsequent shaping, has simple preparation process, has uniform specification of the obtained product, and meets the industrial mass production standard.

Detailed Description

In order to better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific examples and comparative examples, which are intended to be understood in detail, but not intended to limit the invention. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.

Example 1

One embodiment of the ferroalloy coupling and the method of making the same of the present invention.

An iron alloy coupling comprises the following chemical components in percentage by weight: 4% of nickel, 5% of aluminum, 2.5% of copper, 0.6% of silver, 0.5% of carbon, 0.25% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder.

The preparation method of the ferroalloy coupling comprises the following steps:

(1) heating and smelting the raw materials in atmosphere protection, pouring the raw materials into a blank mold, sealing, exhausting and shaping, and cooling to obtain a blank ferroalloy; the smelting temperature is 1600 ℃, and the time is 2.5 h; the atmosphere is nitrogen;

(2) and (2) placing the blank ferroalloy obtained in the step (1) into a coupler mold for extrusion, and then drilling and polishing the flat end face on a processing lathe to obtain the ferroalloy coupler.

Example 2

An iron alloy coupling comprises the following chemical components in percentage by weight: 5% of nickel, 6% of aluminum, 2% of copper, 0.5% of silver, 1% of carbon, 0.25% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder.

(1) heating and smelting the raw materials in atmosphere protection, pouring the raw materials into a blank mold, sealing, exhausting and shaping, and cooling to obtain a blank ferroalloy; the smelting temperature is 1800 ℃ and the smelting time is 2 hours; the atmosphere is nitrogen;

(2) and (2) placing the blank ferroalloy obtained in the step (1) into a coupler mold for extrusion, and then finely processing the blank ferroalloy on a processing lathe to obtain the ferroalloy coupler.

Example 3

An iron alloy coupling comprises the following chemical components in percentage by weight: 3% of nickel, 4% of aluminum, 3% of copper, 0.8% of silver, 0.2% of carbon, 0.6% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder.

(1) heating and smelting the raw materials in atmosphere protection, pouring the raw materials into a blank mold, sealing, exhausting and shaping, and cooling to obtain a blank ferroalloy; the smelting temperature is 1550 ℃, and the smelting time is 3 hours; the atmosphere is nitrogen;

Comparative example 1

The comparative example differs from example 1 only in that, among the raw materials of the iron alloy coupling, the raw material of silver is a common silver powder (particle diameter >50 μm).

Comparative example 2

The comparative example is different from the example 1 only in that the iron alloy coupling comprises the following chemical components in percentage by weight: 4% of nickel, 2% of aluminum, 2.5% of copper, 0.2% of silver, 0.5% of carbon, 0.25% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder.

The hardness tests of the iron alloy coupling products obtained in the examples 1-3 and the comparative examples 1 and 2 are carried out, the test method is GB/T230.1-2018, the hardness of the product obtained in the examples 1-3 is 32HRC, 30HRC and 28HRC respectively, the hardness is higher than that of the common iron alloy coupling, and the hardness of the product obtained in the comparative examples 1 and 2 is 15HRC and 10HRC, which are lower than that of the iron alloy coupling obtained in the embodiment of the invention, so that the iron alloy coupling product provided by the invention has more excellent mechanical properties.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The ferroalloy coupling is characterized by comprising the following chemical components in percentage by weight: 3-5% of nickel, 4-6% of aluminum, 2-3% of copper, 0.5-0.8% of silver, 0-1% of carbon, 0-0.5% of silicon and the balance of iron and inevitable impurities; the raw material of the aluminum is micron-sized aluminum powder; the raw material of the silver is nano silver powder.

2. The ferroalloy coupling of claim 1, comprising the chemical composition in weight percent: 3.5 to 4.5% of nickel, 4.5 to 5.8% of aluminum, 2.2 to 2.7% of copper, 0.55 to 0.7% of silver, 0 to 1% of carbon, 0 to 0.5% of silicon, and the balance of iron and inevitable impurities.

3. The ferroalloy coupling of claim 1, comprising the chemical composition in weight percent: 4% of nickel, 5% of aluminum, 2.5% of copper, 0.6% of silver, 0.5% of carbon, 0.25% of silicon, and the balance of iron and inevitable impurities.

4. The ferroalloy coupling of claim 1 further comprising a chemical composition of oxygen and nitrogen, wherein the sum of the oxygen and nitrogen percentages by weight is less than 0.1%.

5. A method for manufacturing a ferroalloy coupling according to any one of claims 1 to 4, comprising the steps of:

(1) heating and smelting the raw materials in atmosphere protection, pouring the raw materials into a blank mold, sealing, exhausting and shaping, and cooling to obtain a blank ferroalloy;

6. The method for preparing the ferroalloy coupling of claim 5, wherein the temperature for smelting in the step (1) is 1500-1800 ℃, and the atmosphere is nitrogen.

7. The preparation method of the ferroalloy coupling of claim 5, wherein the smelting time in the step (1) is 2-3 h.