Beryllium brass

Abstract

The invention discloses beryllium brass which comprises the following components in percentage by mass: 1.9 to 2.0 percent of Be, 0.2 to 0.5 percent of Ni, 0.1 to 0.13 percent of Fe, 0.03 to 0.08 percent of Al, 0.01 to 0.03 percent of Si, 0.02 to 0.05 percent of Mg and the balance of Cu. According to the component ratio, ingot casting is conducted, the formed ingot casting is subjected to solution treatment and aging treatment, and the secondary aging temperature in the aging treatment procedure is lower than 280 DEG C. According to the scheme, the component ratio of beryllium brass and corresponding treatment process parameters are designed, and the tensile strength, yield strength and other aspects of the formed copper alloy are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of materials, and in particular to beryllium brass. Background Art

[0002] C17200 beryllium copper is widely used in contact components, aerospace and other fields due to its excellent performance, such as conductive brushes, tumble rings, etc. Its components contain Co, but there is a lack of Co resources in China. For this reason, the domestic brand QBe2 omits Co and adds other alloy elements to improve performance. Compared with C17200, QBe2 has a small gap in tensile strength, yield strength, etc., which requires further research and development and improvement. Summary of the invention

[0003] To solve at least one of the above technical defects, the present invention provides the following technical solutions:

[0004] The present application document discloses a beryllium brass, which has the following components by mass: Be 1.9-2.0%, Ni 0.2-0.5%, Fe 0.1-0.13%, Al 0.03-0.08%, Si 0.01-0.03%, Mg 0.02-0.05%, and Cu as the balance;

[0005] The ingot is cast according to the component ratio, and the formed ingot is subjected to solution treatment and aging treatment, wherein the secondary aging temperature in the aging treatment process is lower than 280°C.

[0006] In this scheme, the component ratio of beryllium brass and the corresponding processing parameters are designed, and the formed copper alloy is further improved in terms of tensile strength, yield strength, etc.

[0007] Furthermore, in the solution treatment process, the temperature is 780-800°C and the time is 20-40 minutes.

[0008] Furthermore, in the aging treatment process, the primary aging temperature is 360-380°C, and the insulation time is 5-10 minutes, and the secondary aging temperature is 260-280°C, and the insulation time is 5-8 hours.

[0009] Furthermore, based on mass, the sum of the components of Al, Si and Mg is less than 0.10%. Within this content limit, it helps to further improve the performance of the alloy.

[0010] Furthermore, by mass, the composition ratios are as follows: Be 1.9-2.0%, Ni 0.2-0.5%, Fe 0.1-0.13%, Al 0.03-0.04%, Si 0.01-0.02%, Mg 0.02-0.03%, and the balance Cu.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The present invention develops the component ratio of beryllium copper and subsequent process parameters, and the gap between the formed alloy and the foreign C17200 beryllium copper alloy in terms of tensile strength, yield strength, etc. is further narrowed. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with specific embodiments.

[0014] Example 1

[0015] A beryllium brass, whose components are as follows by mass: Be 1.95%, Ni 0.3%, Fe 0.12%, Al 0.03%, Si 0.02%, Mg 0.03%, and Cu balance.

[0016] Ingot casting is carried out by adding materials according to the component ratio. In the ingot casting process, each component is added into a furnace for melting, and then impurities and oxidation are removed, and secondary refining is carried out using a refining agent. The chemical elements are detected and adjusted to be consistent with the above-mentioned specified component ratio, and then the ingot is cast.

[0017] The formed ingot is subjected to a solution treatment, and the temperature in the solution treatment process is 790°C and the time is 30 minutes.

[0018] The ingot after solution treatment is subjected to aging treatment. In the aging treatment process, the primary aging temperature is 370°C, the holding time is 5 minutes, and the secondary aging temperature is lower than 265°C, the holding time is 5 hours.

[0019] Example 2

[0020] A beryllium brass, whose components are as follows by mass: Be 1.98%, Ni 0.4%, Fe 0.1%, Al 0.08%, Si 0.03%, Mg 0.04%, and Cu balance.

[0021] Ingot casting is carried out by adding materials according to the component ratio. In the ingot casting process, each component is added into a furnace for melting, and then impurities and oxidation are removed, and secondary refining is carried out using a refining agent. The chemical elements are detected and adjusted to be consistent with the above-mentioned specified component ratio, and then the ingot is cast.

[0022] The formed ingot is subjected to a solution treatment, and the temperature in the solution treatment process is 785°C and the time is 40 minutes.

[0023] The ingot after solution treatment is subjected to aging treatment. In the aging treatment process, the primary aging temperature is 375°C, the holding time is 8 minutes, and the secondary aging temperature is lower than 270°C, the holding time is 6 hours.

[0024] Example 3

[0025] A beryllium brass, whose components are as follows by mass: Be 1.91%, Ni 0.3%, Fe 0.13%, Al 0.04%, Si 0.02%, Mg 0.03%, and Cu balance.

[0026] Ingot casting is carried out by adding materials according to the component ratio. In the ingot casting process, each component is added into a furnace for melting, and then impurities and oxidation are removed, and secondary refining is carried out using a refining agent. The chemical elements are detected and adjusted to be consistent with the above-mentioned specified component ratio, and then the ingot is cast.

[0027] The formed ingot is subjected to a solution treatment, and the temperature in the solution treatment process is 795°C and the time is 25 minutes.

[0028] The ingot after solution treatment is subjected to aging treatment. In the aging treatment process, the primary aging temperature is 370°C, the holding time is 5 minutes, and the secondary aging temperature is lower than 260°C, the holding time is 7 hours.

[0029] Comparative Example 1

[0030] Compared with Example 3, the difference is that the secondary aging temperature in the aging treatment process is 285°C.

[0031] Comparative Example 2

[0032] Compared with Example 3, the difference is that the aging treatment process is single-stage aging, the aging temperature is 320° C., and the insulation time is 2 h.

[0033] The properties of the copper alloy prepared above were tested, as shown in Table 1.

[0034] Table 1

[0035] Tensile strength MPa Yield strength MPa Elongation % Example 1 1098 1030 0.94 Example 2 1013 976 0.91 Example 3 1100 1031 0.95 Comparative Example 1 987 954 0.86 Comparative Example 2 975 962 0.84

[0036] It can be seen from the above table that the performance of this copper alloy is closer to that of C17200 copper alloy in terms of tensile strength, yield strength, etc.

[0037] As for the reasons for the performance growth, according to the test results: the grain size of the copper alloy is further refined, and the discontinuous dissolution and precipitation is significantly suppressed under the secondary aging at a limited temperature. The continued dissolution helps to increase the density of the precipitated phase in the matrix, which is reflected in the tensile strength, yield strength and other aspects in the macro aspect.

[0038] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A beryllium brass, characterized in that: By mass, the composition ratios are as follows: Be 1.9-2.0%, Ni 0.2-0.5%, Fe 0.1-0.13%, Al 0.03-0.08%, Si 0.01-0.03%, Mg 0.02-0.05%, and the balance is Cu; The materials are added according to the component ratio to cast the ingot, and the formed ingot is subjected to solution treatment and aging treatment, wherein the secondary aging temperature in the aging treatment process is lower than 280°C.

2. The beryllium brass according to claim 1, characterized in that: In the solution treatment process, the temperature is 780-800°C and the time is 20-40 minutes.

3. The beryllium brass according to claim 1, characterized in that: In the aging treatment process, the primary aging temperature is 360-380℃, and the insulation time is 5-10min; the secondary aging temperature is 260-280℃, and the insulation time is 5-8h.

4. The beryllium brass according to claim 1, characterized in that: The sum of Al, Si and Mg in the composition is less than 0.10% by mass.

5. The beryllium brass according to claim 4, characterized in that: By mass, the components are as follows: Be 1.9-2.0%, Ni 0.2-0.5%, Fe 0.1-0.13%, Al 0.03-0.04%, Si 0.01-0.02%, Mg 0.02-0.03%, and Cu as the balance.