Processing technology for improving creep property of WASP ring forge piece
Through a multi-step processing technology, including punching flattening, multi-fire ring rolling and heat treatment, the problem of difficult traditional forging methods to take into account grain refinement and avoid cracking is greatly improved, and the creep performance of WASP ring forging is greatly improved. .
Patent Information
- Application Number
- CN202411874126.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-02-11
AI Technical Summary
Traditional forging methods are difficult to take into account the contradiction between grain refining of WASP alloys and avoiding cracking, resulting in the forging being prone to creep failure in high temperature and high stress environments.
A processing technology including cutting, punching and flattening, ring rolling and final ring rolling and heat treatment is adopted. This process controls the grain size and morphology of the alloy through multi-fire ring rolling and heat treatment, and improves its creep performance.
Through this process, the creep performance of WASP ring forgings is significantly improved, while ensuring that other alloy properties meet the standard requirements.
Abstract
Description
Technical Field
[0001] The invention relates to the field of processing of ring forgings, and in particular to a processing technology for improving the creep performance of WASP ring forgings. Background Art
[0002] WASP alloy is widely used in high-end equipment manufacturing fields such as aircraft engines and gas turbines due to its excellent high-temperature strength and corrosion resistance. However, traditional forging methods have limitations in improving creep performance, and it is difficult to balance the contradiction between grain refinement and cracking, which leads to creep failure of forgings in high temperature and high stress environments; for example, in the existing forging process, heating is usually carried out at a certain temperature, and then multiple fire rolling deformation is performed, but due to the differences between raw material batches and the influence of the ring rolling process, the grain size and morphology of the alloy material after ring rolling will change significantly, usually showing 2-3 levels of grain refinement. This change has an important influence on the mechanical properties, processing properties, and quality and performance of the final product of the material, especially the creep properties of the alloy. Summary of the invention
[0003] In order to solve the above problems, the present invention proposes a processing technology for improving the creep performance of WASP ring forgings.
[0004] The main contents of the present invention include:
[0005] A processing technology for improving the creep performance of WASP ring forgings comprises the following steps:
[0006] S1. Cutting: Select the bar size according to the product size and cut it according to the specifications to obtain the blank;
[0007] S2. Punching and flattening: heating the blank to a first temperature, keeping the blank for a first set time, roughening the blank, punching a round hole, and obtaining a punched ring product;
[0008] S3. Ring rolling and flattening: heating the punched ring product to a second temperature, keeping the temperature for a second set time, and then performing multiple ring rolling on the punched ring product, with the deformation amount controlled at the first deformation amount; obtaining an intermediate ring forging;
[0009] S4. Final ring rolling: heating the intermediate ring forging to a third temperature, keeping the temperature for a third set time, and then performing a ring rolling on the intermediate ring forging, wherein the deformation amount is controlled at a second deformation amount; and obtaining a final ring forging;
[0010] S5. Heat treatment: performing solution heat treatment and aging heat treatment on the final forging;
[0011] The third temperature is greater than the second temperature, the third set time is greater than the second set time, and the first deformation amount is greater than the second deformation amount.
[0012] Preferably, S2 uses a gas forging furnace to heat the blank to 800°C-1280°C, keeps it warm for 0.1 to 5 hours, then takes the blank out of the gas forging furnace and transfers it to a press, and the transfer time is controlled within 15s-360s; the press is used to roughen and punch round holes in the blank, and the operation time is controlled within 600s to obtain a punched ring product.
[0013] Preferably, S3. The punched ring product is heated to 900°C-1250°C in a gas forging furnace and kept warm for 0.1 to 5 hours. The ring product is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 15s-360s. The ring rolling mill is used to perform multiple rounds of rolling on the ring product. The deformation amount of each round is 10%-50%, so as to obtain a ring forging.
[0014] Preferably, S4. The ring forging is heated to 1000°C-1300°C in a gas forging furnace and kept warm for 0.1 to 4 hours, and then the ring forging is taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 15s-360s. The ring product is rolled once on an R350 vertical ring rolling mill. The deformation amount of each fire is 5%-40%, and the final ring forging is obtained.
[0015] Preferably, S5 uses a gas heat treatment furnace to heat the final ring forging to 1107-1121° C., performs solution heat treatment, keeps the temperature for 1 to 1.5 hours, and then performs aging heat treatment on the final ring forging.
[0016] Preferably, the aging heat treatment step comprises: first heating the final ring forging to 850±10°C and keeping it warm for 4 hours; then heating it to 760±10°C and keeping it warm for 16 hours.
[0017] The beneficial effect of the present invention is that: the present invention proposes a processing technology for improving the creep performance of WASP ring forgings, after punching, flattening and multiple rounds of ring rolling flattening, the ring forgings are subjected to the final round of ring rolling at a heating temperature exceeding the ring rolling flattening heating temperature, and the creep performance of the alloy is greatly improved through a longer heating time, while it can also ensure that other properties of the alloy meet standard requirements. DETAILED DESCRIPTION
[0018] The technical solution protected by the present invention will be described in detail below.
[0019] Embodiment 1
[0020] A processing technology for improving the creep performance of WASP ring forgings comprises the following steps:
[0021] S1. Cutting: Select the bar size according to the product size and cut it according to the specifications to obtain the blank;
[0022] S2. Punching and flattening: The blank is heated to 800°C in a gas forging furnace and kept warm for 1 hour. The blank is then taken out of the gas forging furnace and transferred to a press. The transfer time is controlled within 120 seconds. The blank is roughened and punched with a round hole in the press. The operation time is controlled within 300 seconds to obtain a punched ring product.
[0023] S3. Ring rolling and leveling: The punched ring product is heated to 900°C in a gas forging furnace and kept at this temperature for 0.5 hours. The ring product is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 120 seconds. The ring rolling mill is used to perform multiple rounds of rolling. The deformation of each round is 35% to obtain a ring forging.
[0024] S4. Final ring rolling: The ring forging is heated to 1000°C in a gas forging furnace and kept at this temperature for 2 hours. The ring forging is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 120 seconds. The ring rolling mill is used to perform a single-fire rolling of the ring product with a deformation amount of 10% to obtain a final ring forging;
[0025] S5. Heat treatment: The final ring forging is heated to 1107°C in a gas heat treatment furnace for solution heat treatment, and kept warm for 1 hour. The final ring forging is then heated to 850±10°C for 4 hours; then heated to 760±10°C for 16 hours;
[0026] S6. Performance test: Perform high temperature tensile and microstructure tests on the heat treated ring forgings.
[0027] Embodiment 2
[0028] A processing technology for improving the creep performance of WASP ring forgings comprises the following steps:
[0029] S1. Cutting: Select the bar size according to the product size and cut it according to the specifications to obtain the blank;
[0030] S2. Punching and flattening: The blank is heated to 1280°C in a gas forging furnace and kept warm for 3 hours. The blank is then taken out of the gas forging furnace and transferred to a press. The transfer time is controlled within 120 seconds. The blank is roughened and punched with a round hole by a press. The operation time is controlled within 300 seconds to obtain a punched ring product.
[0031] S3. Ring rolling and leveling: The punched ring product is heated to 1250°C in a gas forging furnace and kept warm for 1 hour. The ring product is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 120 seconds. The ring rolling mill is used to perform multiple fire rolling on the ring product. The deformation of each fire is 40% to obtain a ring forging.
[0032] S4. Final ring rolling: The ring forging is heated to 1300℃ in a gas forging furnace and kept warm for 2 hours. Then the ring forging is taken out of the gas forging furnace and transferred to the ring rolling mill. The transfer time is controlled within 120s. The ring rolling mill is used to perform one-time rolling on the ring product with a deformation of 10% to obtain the final ring forging. ;
[0033] S5. Heat treatment: The final ring forging is heated to 1121°C in a gas heat treatment furnace for solution heat treatment, and kept warm for 1 hour. The final ring forging is then heated to 850±10°C for 4 hours; then heated to 760±10°C for 16 hours;
[0034] S6. Performance test: Perform high temperature tensile and microstructure tests on the heat treated ring forgings.
[0035] Embodiment 3
[0036] A processing technology for improving the creep performance of WASP ring forgings comprises the following steps:
[0037] S1. Cutting: Select the bar size according to the product size and cut it according to the specifications to obtain the blank;
[0038] S2. Punching and flattening: The blank is heated to 940°C in a gas forging furnace and kept warm for 3 hours. The blank is then taken out of the gas forging furnace and transferred to a press. The transfer time is controlled within 120 seconds. The blank is roughened and punched with a round hole in the press. The operation time is controlled within 300 seconds to obtain a punched ring product.
[0039] S3. Ring rolling and leveling: The punched ring product is heated to 1000°C in a gas forging furnace and kept at this temperature for 0.5 hours. The ring product is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 120 seconds. The ring rolling mill is used to perform multiple rounds of rolling. The deformation of each round is 45% to obtain a ring forging.
[0040] S4. Final ring rolling: The ring forging is heated to 1050°C in a gas forging furnace and kept warm for 2 hours. The ring forging is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 120 seconds. The ring rolling mill is used to perform one-time rolling on the ring product with a deformation of 10% to obtain the final ring forging.
[0041] S5. Heat treatment: The final ring forging is heated to 1110°C in a gas heat treatment furnace for solution heat treatment, and the heat is kept for 1.5 hours. The final ring forging is then removed and transferred to a cooling table for cooling; the transfer time is controlled within 60s;
[0042] S6. Performance test: Perform high temperature tensile and microstructure tests on the heat treated ring forgings.
[0043] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A processing technology for improving the creep performance of WASP ring forgings, characterized in that: The steps include: S1. Cutting: Select the bar size according to the product size and cut according to the specifications to obtain the blank; S2. Punching flattening: After heating the blank to heat and heat up to the first temperature, and after the first set time of insulation, the blank is pier and rounded, and the ring product after punching is obtained; S3. Ring rolling and flattening: heating the punched ring product to a second temperature, keeping the temperature for a second set time, and then performing multiple ring rolling on the punched ring product, with the deformation amount controlled at the first deformation amount; obtaining an intermediate ring forging; S4. Final ring rolling: heating the intermediate ring forging to a third temperature, keeping the temperature for a third set time, and then performing a ring rolling on the intermediate ring forging, wherein the deformation amount is controlled at a second deformation amount; and obtaining a final ring forging; S5. Heat treatment: The final forging is subjected to solid solution heat treatment and aging heat treatment; The third temperature is greater than the second temperature, the third set time is greater than the second set time, the first deformation amount is greater than the second deformation amount; the first temperature is greater than the third temperature.
2. A processing technology for improving the creep performance of WASP ring forgings according to claim 1, characterized in that, S2 uses a gas forging furnace to heat the blank to 800℃-1280℃, keeps it warm for 0.1 to 5 hours, then takes the blank out of the gas forging furnace and transfers it to a press, with the transfer time controlled within 15s-360s; uses a press to roughen and punch round holes in the blank, with the operation time controlled within 600s, to obtain a punched ring product.
3. A processing technology for improving the creep performance of WASP ring forgings according to claim 1, characterized in that S3. The punched ring product is heated to 900°C-1250°C in a gas forging furnace and kept warm for 0.1 to 5 hours. The ring product is then taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 15s-360s. The ring rolling mill is used to perform multiple rounds of rolling on the ring product. The deformation amount of each round is 10%-50%, and a ring forging is obtained.
4. A processing technology for improving the creep performance of WASP ring forgings according to claim 1, characterized in that, S4. The ring forging is heated to 1000℃-1300℃ by a gas forging furnace and kept warm for 0.1 to 4 hours. Then the ring forging is taken out of the gas forging furnace and transferred to a ring rolling mill. The transfer time is controlled within 15s-360s. The ring rolling mill is used to roll the ring product once. The deformation is controlled within 5%-40% to obtain the final ring forging.
5. A processing technology for improving the creep performance of WASP ring forgings according to claim 1, characterized in that, S5 uses a gas heat treatment furnace to heat the final ring forging to 1107-1121°C, perform solid solution heat treatment, keep warm for 1 to 1.5 hours, and then perform aging heat treatment on the final ring forging.
6. A processing technology for improving the creep performance of WASP ring forgings according to claim 5, characterized in that, The steps of aging heat treatment include: first heating the final ring forging to 850±10°C and keeping it warm for 4 hours; then heating it to 760±10°C and keeping it warm for 16 hours.