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Problems solved by technology
The billet is hot forged with multi-direction reversing multiple times. After forging, air cooling and water cooling are alternately used for cooling. Cold forming technology successfully realizes the feasibility of ultrasonic flaw detection inside the bar, and successfully eliminates the problem of no echo or weak echo in the process of ultrasonic flaw detection of bars that cannot reach non-destructive testing
Method used
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Embodiment 1
[0027] The invention discloses a processing method for a zirconium oxygen-free copper forging rod, and the specific implementation is as follows:
[0028] 1. Raw material selection: chemical composition Zr: 0.15%, Cu balance, density 8.9g / cm3. Billet specifications: weight 670kg, billet diameter 360mm, billet length 720mm, square billet.
[0029] 2. Heating process: heat up the empty furnace to 800°C, put the billet into it and continue to heat up to 950°C for 2 hours, and keep it warm for 2 hours.
[0030] 3. Forging process: Upsetting the billet from the length direction (the original circumferential direction of the billet: X-axis), and then elongating the billet from the Y-axis direction; upsetting from the Y-axis direction, and elongating from the Z-axis direction; Upsetting is performed from the Z-axis direction, and elongation is performed from the X-axis direction. Complete within one fire. The reduction in the upsetting process is 45%. Cooling, grinding, reheating...
Embodiment 2
[0042] The invention discloses a processing method for a zirconium oxygen-free copper forging rod, and the specific implementation is as follows:
[0043] 1. Raw material selection: chemical composition Zr: 0.15%, Cu balance, density 8.9g / cm3. Billet specifications: weight 350kg, billet diameter 270mm, billet length 540mm, square billet.
[0044] 2. Heating process: heat up the empty furnace to 800°C, put the billet into it and continue to heat up to 930°C for 2 hours, and keep it warm for 1.5 hours.
[0045]3. Forging process: Upsetting the billet from the length direction (the original circumferential direction of the billet: X-axis), and then elongating the billet from the Y-axis direction; upsetting from the Y-axis direction, and elongating from the Z-axis direction; Upsetting is performed from the Z-axis direction, and elongation is performed from the X-axis direction. Complete within one fire. The reduction in the upsetting process is 43%. Cooling, grinding, reheatin...
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Abstract
The invention discloses a processing method of a zirconiumoxygen-free copperforging rod. A rod material adopts zirconiumoxygen-free coppercasting billets. After forging and blanking, the casting billets are produced by hot forging, upsetting and stretching, solidsolution treatment, cold forging, machining, aging and machining again. The specification can reach Phi (100-300)*(500-1500) mm. Theimportant thing to note that after the rod material is subjected to cold forging and machining, ultrasonic flaw detection is needed for nondestructive testing of internal quality. The processing method can successfully realize the feasibility of nondestructive flaw detection and avoid the problem that no echo exists or echo is weak in the ultrasonic flaw detection process of the rod material, sothat the detection requirement cannot be met. The product is applied to inner wall shrinkage parts of a power chamber groove of a rocket engine, the tensile strength and yield strength are still above150MPa at 500 DEG C, and the elongation rate is also above 15%.
Description
technical field [0001] The invention belongs to the technical field of metal material forming, and in particular relates to a processing method for a zirconiumoxygen-free copper forging rod. Background technique [0002] As the source of rocket power, the rocket engine requires a large investment in technology and capital in the manufacturing process. In order to effectively improve its service life, it is necessary to use high-performance parameter materials. Among them, zirconium oxygen-free copper material has been used as the main material for the inner wall of the domestic rocket engine power chamber groove because of its high conductivity, thermal strength and oxidation resistance. This paper introduces an industrial production process for large-scale zirconium oxygen-free copper rods. On the basis of conventional forging and heat treatment processes, new forging methods, heating methods, and cooling methods are adopted, and the control of processing parameters is ref...
Claims
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Application Information
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