Accurate calibration method for heating temperature of copper composite cast ingot
By setting temperature measurement holes on the copper composite ingot and using a multi-channel temperature recording instrument and an induction heating furnace for heating control, the problem of uneven temperature during the heating process of the copper composite ingot is solved, and uniform heating of the ingot is achieved and Accurate temperature control for subsequent processing.
Patent Information
- Application Number
- CN202411758242.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-02-11
AI Technical Summary
During the heating process, large-size copper composite ingots have uneven thermal conductivity, which leads to difficulty in temperature control, which easily leads to uneven temperatures in the core and surface of the ingot, affecting subsequent pressure extrusion processing.
Four temperature measurement holes are set in the length direction of the copper composite ingot, and heating control is performed using multi-channel temperature recording instruments and induction heating furnaces. The temperature change trends and temperature differences of the four temperature measurement holes are monitored and recorded in real time, and the temperature difference is carried out through a resistance heat-efficient furnace Insulation treatment ensures that the ingot reaches a uniform heating state.
This method can accurately determine the heating temperature of the copper composite ingot, ensure that the temperature of the ingot is uniform during subsequent pressure extrusion processing, and avoid processing problems caused by uneven temperatures.
Smart Images
Figure CN119413839A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of copper composite copper ingot processing methods, and in particular to a method for accurately calibrating the heating temperature of a copper composite copper ingot. Background Art
[0002] Copper composite materials have the advantages of high strength, excellent electrical conductivity, strong corrosion resistance, and light weight. They complement each other's strengths and weaknesses, producing a coordinated effect, making the overall performance better than that of a single metal. They are widely used in superconducting materials, electrode plates, high-end equipment, etc. At the same time, copper composite materials also take into account the advantages of the two composite metals, improving the comprehensive performance of the composite materials, making them more suitable for comprehensive utilization in multiple scenarios and environments. In addition, it can also save precious metals. At present, the preparation processes of copper composite materials are mainly hot pressing composite, cold rolling composite, jacket stretching extrusion composite, etc. The pressure extrusion process requires that the composite copper ingot be evenly heated to ensure smooth processing of the composite copper ingot, and at the same time, it can ensure that the processed composite copper ingot material meets the application technical requirements. However, due to the different physical properties of the composite single metals, the thermal conductivity of the composite copper ingot is inconsistent. At the same time, the melting points of the metals inside the composite copper ingot vary greatly. During the processing and heating process, if the temperature is not properly controlled, the core and surface temperatures of the composite copper ingot are uneven, and the ingot is not heated through, it is very easy to cause the ingot to be scrapped during the processing process, and a certain single metal cannot be squeezed, or the high-purity oxygen-free copper matrix is melted, and the internal composite metal hardens and "cannot be squeezed".
[0003] Therefore, it is necessary to conduct a temperature test on the composite copper ingot in the soaking furnace to achieve precise control and calibration of the heating temperature of the copper composite ingot, so as to ensure accurate temperature control of subsequent batch and large-size ingots. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a method for accurately calibrating the heating temperature of a copper composite copper ingot.
[0005] In order to achieve the above object, the technical solution of the present invention is as follows: A method for accurately calibrating the heating temperature of a copper composite copper ingot comprises the following steps: S1. Four temperature measuring holes A, B, C and D are set in the length direction of the copper composite ingot; wherein, the temperature measuring hole A is vertically drilled at the tail of the copper composite ingot, and the hole depth is 1 / 2 of the radius of the copper composite ingot; the temperature measuring hole B is vertically drilled at 280 mm from the tail of the copper composite ingot, and the hole depth is the radius of the copper composite ingot; the temperature measuring hole C is 280 mm from the head of the copper composite ingot and drilled inward at 30° with the surface of the copper composite ingot, and the hole depth is 1 / 4 of the radius of the copper composite ingot; the temperature measuring hole D is vertically drilled at the head of the copper composite ingot, and the hole depth is 1 / 2 of the radius of the copper composite ingot; S2. Equipment selection: multi-channel temperature recording instrument, induction heating furnace, resistance soaking furnace; S3. Check whether the multi-channel temperature recorder is operating normally, and at the same time determine whether the standard temperature thermocouple is normal. Insert the heat transfer wire of the temperature recorder into the four temperature measuring holes A, B, C, and D of the copper composite ingot. Then, send the copper composite ingot into the induction heating furnace, seal the furnace entrance, and start the instrument to measure the temperature. S4. Set the upper and lower limits of the temperature of the infrared temperature measuring instrument of the induction heating furnace; S5. During the heating process, always pay attention to the temperature of the thermocouple. During the repeated heating process of the heating furnace, observe the temperature change trend, temperature difference and heating time of the four temperature measuring holes A, B, C and D in real time, and record their parameters; When the temperature of the four temperature measuring holes A, B, C, and D shows that the whole reaches the set temperature, the heating is stopped and the steel is placed in the resistance soaking furnace for a certain period of time for subsequent pressure extrusion processing. At this time, according to the data records, a reasonable copper composite ingot temperature and heating time are set to avoid subsequent pressure processing problems caused by uneven temperature of the ingot.
[0006] Wherein, in step S1, the diameter of the temperature measuring hole is 3 mm.
[0007] Wherein, in the step S4, the upper limit is 750°C and the lower limit is 760°C. When the infrared thermometer detects that the temperature reaches the upper limit of 760°C, the power is automatically cut off; when the temperature reaches the lower limit of 750°C, power is automatically supplied for heating to meet the demand for rapid heating of the copper composite ingot, and repeated heating promotes uniform heat penetration of the copper composite ingot.
[0008] The beneficial effect of the present invention is that the present invention solves the problem that the temperature conduction performance of large-scale copper composite copper ingots and bars is different during the heating process, the heat cannot be evenly distributed, and the overall temperature cannot be controlled. Through this method, the internal temperature conduction curve of the large-scale composite ingot can be clearly calibrated, which has a good guiding significance for the subsequent large-scale copper composite materials that require precise temperature control. The present invention can be applied to the precise temperature calibration experiment of copper composite (binary or ternary composite, such as copper-titanium, copper-silver, copper-nickel, copper-niobium) ingots with uneven thermal conductivity to meet the subsequent large-scale pressure extrusion processing temperature precision control. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 The schematic diagram of the structure of the copper composite ingot of the invention.
[0010] Figure 2 This is a positional relationship diagram of the four temperature measuring holes of the invention.
[0011] Figure 3 This is the structural principle diagram of the four temperature measuring holes invented.
[0012] Among them, 1. Copper composite ingot; 2. Composite single metal body. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.
[0014] like Figures 1 to 3 As shown, a method for accurately calibrating the heating temperature of a copper composite copper ingot comprises the following steps: S1. Four temperature measuring holes A, B, C and D are set in the length direction of the copper composite ingot 1; wherein, the temperature measuring hole A is vertically drilled at the tail of the copper composite ingot 1, and the hole depth is 1 / 2 of the radius of the copper composite ingot 1; the temperature measuring hole B is vertically drilled at 280 mm from the tail of the copper composite ingot 1, and the hole depth is the radius of the copper composite ingot 1; the temperature measuring hole C is 280 mm from the head of the copper composite ingot 1 and drilled inward at 30° with the surface of the copper composite ingot 1, and the hole depth is 1 / 4 of the radius of the copper composite ingot 1; the temperature measuring hole D is vertically drilled at the head of the copper composite ingot 1, and the hole depth is 1 / 2 of the radius of the copper composite ingot 1; S2. Equipment selection: multi-channel temperature recording instrument, induction heating furnace, resistance soaking furnace; S3, check whether the multi-channel temperature recorder is operating normally, and at the same time determine whether the standard temperature thermocouple is normal, insert the heat conduction wire of the temperature recorder into the four temperature measuring holes A, B, C, and D of the copper composite ingot 1, then send the copper composite ingot 1 into the induction heating furnace, seal the furnace entrance, and start the instrument to measure the temperature; S4. Set the upper and lower limits of the temperature of the infrared temperature measuring instrument of the induction heating furnace; S5. During the heating process, always pay attention to the temperature of the thermocouple. During the repeated heating process of the heating furnace, observe the temperature change trend, temperature difference and heating time of the four temperature measuring holes A, B, C and D in real time, and record their parameters; When the temperature of the four temperature measuring holes A, B, C, and D shows that the whole reaches the set temperature, the heating is stopped and the ingot is placed in the resistance soaking furnace for a certain period of time for subsequent pressure extrusion processing. At this time, according to the data records, a reasonable temperature and heating time of the copper composite ingot 1 are set to avoid subsequent pressure processing problems caused by uneven temperature of the ingot.
[0015] Wherein, in step S1, the diameter of the temperature measuring hole is 3 mm.
[0016] Wherein, in the step S4, the upper limit is 750°C and the lower limit is 760°C. When the infrared thermometer detects that the temperature reaches the upper limit of 760°C, the power is automatically cut off; when the temperature reaches the lower limit of 750°C, power is automatically supplied for heating to meet the demand for rapid heating of the copper composite ingot, and repeated heating promotes uniform heat penetration of the copper composite ingot.
[0017] The specific embodiments are as follows: The copper composite ingot 1 is heated by an induction heating furnace. The lower limit of the temperature of the infrared thermometer of the induction heating furnace is set to 670°C and the upper limit is set to 680°C. When the surface temperature of the copper composite ingot 1 reaches 680°C, the induction heating furnace is automatically powered off. When the surface temperature is lower than 670°C, the induction heating furnace is automatically powered on for heating. By setting the temperature control range of the heating furnace, the copper composite ingot 1 can be repeatedly heated to promote the heat penetration of the ingot.
[0018] During the repeated heating process of the heating furnace, the temperature change trend, temperature difference and heating time of the four temperature measuring holes A, B, C and D are observed and recorded in real time.
[0019] Through the temperature calibration test, the temperature change trend of the ingot core and surface and the time required for the ingot to heat through can be accurately grasped, the ingot heating time can be determined, and the first heating and heat through before the copper composite ingot is extruded can be determined.
[0020] Through the induction furnace temperature test, the heating law and heat conduction law of copper composite ingot can be accurately mastered, so as to achieve uniform heating and heat penetration of the ingot by the induction heating furnace.
[0021] After the induction heating furnace is heated to the process requirement of 670-680 ℃, the rear end of the induction heating furnace transfers the copper composite ingot to the resistance soaking furnace through a roller for further soaking and heat penetration. The resistance soaking furnace uses resistance wire heating, with an operating temperature of 1200 ℃, a rated power of 500 KW, and a furnace capacity of 10 tons. An inert gas pipeline is designed in the resistance soaking furnace, and the inert gas is used to protect the ingot during the heating process.
[0022] The temperature of the resistance soaking furnace was set at 680°C, the holding time was set at 30 minutes, and nitrogen was introduced into the resistance soaking furnace for protection to prevent large-area surface oxidation of the ingot.
[0023] According to the temperature record of copper composite ingot 1, set a reasonable heating temperature process for copper composite ingot and bar.
[0024] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.
Claims
1. A method for accurately calibrating the heating temperature of a copper composite copper ingot, characterized in that: The following steps are involved: S1. Four temperature measuring holes A, B, C and D are arranged in the length direction of the copper composite ingot (1); wherein, the temperature measuring hole A is a vertical hole drilled at the tail of the copper composite ingot (1), and the hole depth is 1 / 2 of the radius of the copper composite ingot (1); the temperature measuring hole B is a vertical hole drilled 280 mm away from the tail of the copper composite ingot (1), and the hole depth is the radius of the copper composite ingot (1); the temperature measuring hole C is a hole drilled 280 mm away from the head of the copper composite ingot (1) and inwardly at an angle of 30° to the surface of the copper composite ingot (1), and the hole depth is 1 / 4 of the radius of the copper composite ingot (1); the temperature measuring hole D is a vertical hole drilled at the head of the copper composite ingot (1), and the hole depth is 1 / 2 of the radius of the copper composite ingot (1); S2. Equipment selection: multi-channel temperature recording instrument, induction heating furnace, resistance soaking furnace; S3, check whether the multi-channel temperature recorder is operating normally, and at the same time determine whether the standard temperature thermocouple is operating normally, insert the heat transfer wire of the temperature recorder into the four temperature measuring holes A, B, C, and D of the copper composite ingot (1), then put the copper composite ingot (1) into the induction heating furnace, seal the furnace entrance, and start the instrument to measure the temperature; S4. Set the upper and lower limits of the temperature of the infrared temperature measuring instrument of the induction heating furnace; S5. During the heating process, always pay attention to the temperature of the thermocouple. During the repeated heating process of the heating furnace, observe the temperature change trend, temperature difference and heating time of the four temperature measuring holes A, B, C and D in real time, and record their parameters; When the temperatures of the four temperature measuring holes A, B, C, and D show that the whole reaches the set temperature, the heating is stopped and the ingot is placed in a resistance equalizing furnace for a certain period of time for subsequent pressure extrusion processing. At this time, according to the data records, a reasonable temperature and heating time of the copper composite ingot (1) are set to avoid subsequent pressure processing problems caused by uneven temperature of the ingot.
2. The method for accurately calibrating the heating temperature of a copper composite copper ingot according to claim 1, characterized in that: In step S1, the diameter of the temperature measuring hole is 3 mm.
3. The method for accurately calibrating the heating temperature of a copper composite copper ingot according to claim 1, characterized in that: In the step S4, the upper limit is 750°C and the lower limit is 760°C. When the infrared thermometer detects that the temperature reaches the upper limit of 760°C, the power is automatically cut off; when the temperature reaches the lower limit of 750°C, power is automatically supplied for heating to meet the demand for rapid heating of the copper composite ingot, and repeated heating promotes uniform heat penetration of the copper composite ingot.