CN109355526B - High-elasticity copper-titanium alloy and tissue regulation method thereof - Google Patents
High-elasticity copper-titanium alloy and tissue regulation method thereof Download PDFInfo
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Abstract
The invention discloses a high-elasticity copper-titanium alloy and a tissue regulation method thereof, belonging to the field of nonferrous metal processing. The alloy comprises the following components in percentage by weight: 2-2.4%, Cr: 0.1 to 0.3%, Ni: 0.1-0.3%, Co: 0.05-0.1% and the balance of Cu. The method for regulating the structure of the alloy comprises the following steps: (1) smelting; (2) milling a surface; (3) hot rolling; (4) and (5) solid solution aging treatment. The high-elasticity copper-titanium alloy has high strength, elasticity and stress relaxation resistance, has good conductivity, and can be applied to telecommunication, electronic industry and automobile electronic elements. In addition, the invention can realize higher comprehensive performance by regulating and controlling the structure of the high-elasticity copper-titanium alloy.
Description
Technical Field
The invention belongs to the field of nonferrous metal processing, and particularly relates to a high-elasticity copper-titanium alloy and a tissue regulation method thereof.
Background
After solution aging treatment, beryllium copper alloy has high elasticity and strength, and excellent performances such as thermal conductivity, electrical conductivity, corrosion resistance, wear resistance, fatigue resistance and the like, and is widely used in industries such as electronics, electricity, communication, instruments, meters, telecommunication, light industry, machinery, chemical industry, coal and the like. However, due to the toxicity of beryllium and its resource characteristics, the development of new materials with properties that even exceed those of beryllium-copper alloys is urgently needed. The high-elasticity copper-titanium alloy and the tissue regulation and control method thereof developed by the invention can achieve excellent comprehensive performance and can completely meet the requirements of the electronic industry and the automobile industry on high-performance elastic devices.
Disclosure of Invention
The invention aims to provide a high-elasticity copper-titanium alloy which comprises the following components in percentage by weight: 2.05-2.4%, Cr: 0.26 to 0.3%, Ni: 0.21-0.3%, Co: 0.07-0.1% of Cu in balance;
the tissue regulation method of the high-elasticity copper-titanium alloy comprises the following steps: (1) smelting; (2) milling a surface; (3) hot rolling; (4) solid solution aging treatment;
the heating temperature in the hot rolling in the step (3) is 900 ℃, the heat preservation time is 1h, and the total hot rolling processing rate is 80-90%;
the grain size of the alloy microstructure after the solution aging treatment in the step (4) is 10-30 mu m, and the precipitation density of a precipitated phase is 5 × 1021～5×1023m-3；
The alloy has tensile strength of 1100-1200 MPa, elongation of 5-7.2% and electric conductivity of 15-20% IACS.
A tissue regulation method of a high-elasticity copper-titanium alloy comprises the following steps: (1) smelting; (2) milling a surface; (3) hot rolling; (4) solid solution aging treatment;
the heating temperature in the hot rolling in the step (3) is 900 ℃, the heat preservation time is 1h, and the total hot rolling processing rate is 80-90%;
after the alloy in the step (1) is smelted, no matter what preparation and processing technology is adopted, on the basis of the requirement of a finished product, the total processing rate is ensured to reach more than 82%.
And (2) milling the upper surface and the lower surface of the alloy by 1mm respectively.
The solution and aging treatment in the step (4) is to heat the mixture to a solution temperature T1 through a vertical or horizontal annealing furnace and rapidly carry out gas cooling; then heated to a temperature T2 by a bell jar annealing furnace and rapidly cooled by gas.
The solid solution temperature T1 of the solid solution aging treatment in the step (4) is 820-890 ℃, the solid solution temperature T2 is 420-490 ℃, nitrogen is used as cooling gas for gas cooling, and the temperature is less than or equal to 20 ℃.
The invention has the beneficial effects that:
(1) the high-elasticity copper-titanium alloy does not contain metallic beryllium, has high strength, elasticity and stress relaxation resistance, and can meet the use requirement of the elastic alloy. Simultaneously has good conductivity, and can be applied to telecommunication, electronic industry and automobile electronic components.
(2) On the premise that the alloy conforms to the conventional copper alloy preparation process, the higher comprehensive performance can be achieved by regulating the structure of the alloy, the operation is simple, and a feasible method is provided for commercial production of high-elasticity copper alloy.
Detailed Description
The invention provides a high-elasticity copper-titanium alloy and a tissue regulation method thereof, and the invention is further explained by combining with an embodiment.
Example 1:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 1.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, raising the temperature to 1250 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1150 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 85%.
(4) Solution and aging treatment, namely heating to a solution temperature of 830 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 450 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 10 mu m and the precipitation density of a precipitated phase to be 5 × 1021m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 1 below.
Example 2:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below, example 2.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1260 ℃, adding a covering agent (charcoal) for heat preservation for 10min after the melt is completely melted, fully degassing, removing impurities, preserving the heat for 8min, fully stirring, standing for 5min, discharging from the furnace and casting, wherein the casting temperature is 1150 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 85%.
(4) Solution and aging treatment, namely heating to a solution temperature of 830 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 450 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 30 mu m and the precipitation density of a precipitated phase to be 5 × 1023m-3。
The properties of the alloy after the above steps are shown in table 2 below as example 2.
Example 3:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is as in example 3 of table 1 below.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, raising the temperature to 1250 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1150 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 80%.
(4) Solution and aging treatment, namely heating to a solution temperature of 850 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 460 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 20 mu m and the precipitation density of a precipitated phase to be 5 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 3 below.
Example 4:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below, example 4.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1250 ℃, adding a covering agent (charcoal) for heat preservation for 10min after the melt is completely melted, fully degassing, removing impurities, preserving heat for 8min, fully stirring, standing for 5min, discharging from a furnace, and casting, wherein the casting temperature is 1150 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 80%.
(4) Solution and aging treatment, namely heating to a solution temperature of 850 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 460 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 15 mu m and the precipitation density of a precipitated phase to be 1 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 4 below.
Example 5:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 5.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, raising the temperature to 1280 ℃ until the melt is completely melted, preserving the heat for 8min, fully stirring, standing for 5min, discharging from the furnace and casting, wherein the casting temperature is 1180 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 90%.
(4) Solution and aging treatment, namely heating to the solution temperature of 860 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to the temperature of 480 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 13 mu m and the precipitation density of a precipitated phase to be 5 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 5 below.
Example 6:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 6.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1280 deg.C until the melt is completely melted, adding covering agent (charcoal) and keeping the temperature for 10min, degassing, removing impurities, keeping the temperature for 8min, stirring, standing for 5min, and taking out of the furnace and casting at 1180 deg.C.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 90%.
(4) Solution and aging treatment, namely heating to the solution temperature of 860 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to the temperature of 480 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 16 mu m and the precipitation density of a precipitated phase to be 9 × 1021m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 6 below.
Example 7:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 7.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1250 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1180 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 82%.
(4) Cold rolling: the alloy was cold rolled with a total reduction of 85%.
(5) Solution and aging treatment, namely heating to a solution temperature of 870 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 490 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 25 mu m and the precipitation density of a precipitated phase to be 2 × 1023m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 7 below.
Example 8:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 8.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1250 ℃, adding a covering agent (charcoal) for heat preservation for 10min after the melt is completely melted, fully degassing, removing impurities, preserving heat for 8min, fully stirring, standing for 5min, discharging from a furnace, and casting, wherein the casting temperature is 1180 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 82%.
(4) Cold rolling: the alloy was cold rolled with a total reduction of 85%.
(5) Solution and aging treatment, namely heating to a solution temperature of 870 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 490 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 30 mu m and the precipitation density of a precipitated phase to be 3 × 1023m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 8 below.
Example 9:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 9.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, raising the temperature to 1250 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1150 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 90%.
(4) Solution and aging treatment, namely heating to a solution temperature of 820 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 440 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 21 mu m and the precipitation density of a precipitated phase to be 8 × 1021m-3。
The properties of the alloy after the above procedure are shown in Table 2, example 9 below.
Example 10:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 10.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1250 ℃, adding a covering agent (charcoal) for heat preservation for 10min after the melt is completely melted, fully degassing, removing impurities, preserving heat for 8min, fully stirring, standing for 5min, discharging from the furnace and casting, wherein the casting temperature is 1160 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 90%.
(4) Solution and aging treatment, namely heating to solution temperature 890 ℃ through a horizontal annealing furnace and rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to temperature 460 ℃ through a bell jar type annealing furnace and rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), so that the grain size of a microstructure is 17 mu m, and the precipitation density of a precipitated phase is 4 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2 below as example 10.
Example 11:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 11.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1260 ℃, adding covering agent (charcoal) and preserving heat for 10min after the melt is completely melted, fully degassing, removing impurities and preserving heat for 8min, fully stirring, standing for 5min, discharging from the furnace and casting, wherein the casting temperature is 1180 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 86%.
(4) Solution and aging treatment, namely heating to solution temperature 890 ℃ through a horizontal annealing furnace and rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to temperature 430 ℃ through a bell jar type annealing furnace and rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), so that the grain size of a microstructure is 12 mu m, and the precipitation density of a precipitated phase is 5 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2 below as example 11.
Example 12:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 12.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1260 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1180 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 80%.
(4) Cold rolling: the alloy was cold rolled with a total reduction of 86%.
(5) Solution and aging treatment, namely heating to a solution temperature of 880 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 470 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 11 mu m and the precipitation density of a precipitated phase to be 8 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2 below for example 12.
Example 13:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is as shown in table 1 below for example 13.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1250 ℃, adding a covering agent (charcoal) for heat preservation for 10min after the melt is completely melted, fully degassing, removing impurities, preserving heat for 8min, fully stirring, standing for 5min, discharging from the furnace and casting, wherein the casting temperature is 1160 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 88%.
(4) Solution and aging treatment, namely heating to the solution temperature of 860 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to the temperature of 450 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 15 mu m and the precipitation density of a precipitated phase to be 6 × 1022m-3。
The properties of the alloy after the above procedure are shown in Table 2 below as example 13.
Example 14:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is shown in table 1 below as example 14.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1260 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1160 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 80%.
(4) Cold rolling: the alloy was cold rolled with a total reduction of 90%.
(5) Solution and aging treatment, namely heating to a solution temperature of 850 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 460 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 16 mu m and the precipitation density of a precipitated phase to be 4 × 1023m-3。
The properties of the alloy after the above procedure are shown in Table 2 below for example 14.
Example 15:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is as in example 15 of table 1 below.
(1) Smelting: smelting by adopting a non-vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, heating to 1270 deg.C until the melt is completely melted, adding covering agent (charcoal), keeping the temperature for 10min, degassing, removing impurities, keeping the temperature for 8min, stirring, standing for 5min, and taking out of the furnace and casting at 1160 deg.C.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 84%.
(4) Solution and aging treatment, namely heating to solution temperature 890 ℃ through a horizontal annealing furnace and rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to temperature 460 ℃ through a bell jar type annealing furnace and rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), so that the grain size of a microstructure is 18 mu m, and the precipitation density of a precipitated phase is 2 × 1023m-3。
The properties of the alloy after the above procedure are shown in Table 2 below for example 15.
Example 16:
in the embodiment, the alloy is smelted by adopting the following raw materials: electrolytic copper, pure titanium, copper chromium alloy, copper cobalt alloy, metallic nickel, the alloy composition is as shown in table 1 below for example 16.
(1) Smelting: smelting by adopting a vacuum induction furnace, wherein the adding sequence of the alloy is as follows: electrolyzing copper, pure titanium, copper-chromium alloy, copper-cobalt alloy and metallic nickel, raising the temperature to 1250 ℃, keeping the temperature for 8min after the melt is completely melted, fully stirring, standing for 5min, discharging and casting, wherein the casting temperature is 1160 ℃.
(2) Milling a surface: and milling the alloy, wherein the upper surface and the lower surface are respectively milled by 1 mm.
(3) Hot rolling: and heating the alloy at 900 ℃, keeping the temperature for 1h, and keeping the total hot rolling processing rate at 80%.
(4) Cold rolling: the alloy was cold rolled with a total reduction of 88%.
(5) Solution and aging treatment, namely heating to a solution temperature of 840 ℃ through a horizontal annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), heating to a temperature of 490 ℃ through a bell jar type annealing furnace, rapidly performing gas cooling (the gas temperature is less than or equal to 20 ℃), and enabling the grain size of a microstructure to be 20 mu m and the precipitation density of a precipitated phase to be 6 × 1021m-3。
The properties of the alloy after the above procedure are shown in Table 2 below as example 16.
TABLE 1 formulation (wt%) of alloy compositions of examples 1-16
TABLE 2 Main Property Table for alloys of examples 1-16
Claims (6)
1. The high-elasticity copper-titanium alloy is characterized by comprising the following components in percentage by weight: 2.05-2.4%, Cr: 0.26 to 0.3%, Ni: 0.21-0.3%, Co: 0.07-0.1% of Cu in balance;
the tissue regulation method of the high-elasticity copper-titanium alloy comprises the following steps: (1) smelting; (2) milling a surface; (3) hot rolling; (4) solid solution aging treatment;
the heating temperature in the hot rolling in the step (3) is 900 ℃, the heat preservation time is 1h, and the total hot rolling processing rate is 80-90%;
the grain size of the alloy microstructure after the solution aging treatment in the step (4) is 10-30 mu m, and the precipitation density of a precipitated phase is 5 × 1021～5×1023m-3；
The alloy has tensile strength of 1100-1200 MPa, elongation of 5-7.2% and electric conductivity of 15-20% IACS.
2. The method for regulating the structure of the high-elasticity copper-titanium alloy according to claim 1, which comprises the following steps: (1) smelting; (2) milling a surface; (3) hot rolling; (4) solid solution aging treatment;
and (3) the heating temperature in the hot rolling in the step (3) is 900 ℃, the heat preservation time is 1h, and the total hot rolling processing rate is 80-90%.
3. The method for regulating the structure of the high-elasticity copper-titanium alloy according to claim 2, wherein after the alloy is smelted in the step (1), no matter what preparation and processing technology is adopted, the total processing rate is ensured to be more than 82% on the basis of the requirement of a finished product.
4. The method for regulating the structure of the high-elasticity copper-titanium alloy according to claim 2, wherein the upper surface and the lower surface of the alloy in the step (2) are milled by 1mm respectively.
5. The structure regulating method for the high-elasticity copper-titanium alloy according to claim 2, wherein the solution aging treatment in the step (4) is heating to a solution temperature T1 through a vertical or horizontal annealing furnace, and rapidly performing gas cooling; then heated to a temperature T2 by a bell jar annealing furnace and rapidly cooled by gas.
6. The method for regulating the structure of the high-elasticity copper-titanium alloy according to claim 2, wherein the solid solution temperature T1 of the solid solution aging treatment in the step (4) is 820-890 ℃, the temperature T2 is 420-490 ℃, nitrogen is used as cooling gas for gas cooling, and the temperature is less than or equal to 20 ℃.
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