Manufacturing process of In625 forge piece with high energy absorption characteristic

Abstract

The invention provides a manufacturing process of an In625 forge piece with a high-energy absorption characteristic. The manufacturing process comprises the following steps that S1, a bar is cut; s2, punching is conducted, specifically, the blank is heated to 950-1200 DEG C, and heat preservation is conducted for 1-5 hours; s3, ring rolling is conducted, specifically, the punched ring forging is heated to 900-1150 DEG C, and heat preservation is conducted for 0.5-4 hours; s4, forming: heating at 900-1150 DEG C, preserving heat for 0.5-4 hours, putting a straight-rolled blank into a forming barrel, and enabling an upper table board of a pressing machine to move downwards to compress a product to a set height; and S5, heat treatment is conducted, specifically, solid solution annealing heat treatment is conducted within the temperature range of 1148-1204 DEG C, the heat preservation time is 1-3 hours, and water cooling is conducted. Solution annealing and high-temperature large-deformation rolling are adopted in heat treatment, the problem that [UTS (ksi) xElongation (% in 4D)] / 100 is lower than the standard requirement is solved, the product performance requirement of customers is met, the one-time passing rate is increased, and the market competitiveness is improved.

Description

Technical Field

[0001] The invention relates to the field of alloy forging, and in particular to a manufacturing process of an In625 forging with high energy absorption characteristics. Background Art

[0002] Inconel 625 (In625 for short) nickel-chromium alloy is widely used due to its high strength, excellent machinability and outstanding corrosion resistance. Its operating temperature range can be from cryogenic to 982°C. It is widely used in the hot end parts of engines in the aerospace industry. At present, users have different requirements for In625 forgings according to different application fields. Among them, the conventional In625 stress relief annealing forging process cannot meet customer standards for In625 forgings that require high energy absorption characteristics. It is necessary to formulate forging process parameters that match the solution annealing process to meet customer requirements.

[0003] At present, there are five test indicators for In625 forgings with high energy absorption requirements: room temperature tensile, high temperature tensile, room temperature impact, grain size, and [UTS (ksi) x Elongation (% in 4D)] / 100 value. With the current process, the [UTS (ksi) x Elongation (% in 4D)] / 100 value may be critical or lower than the standard requirement. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a manufacturing process of In625 forgings with high energy absorption characteristics.

[0005] The main contents of the present invention include:

[0006] A manufacturing process of an In625 forging with high energy absorption characteristics comprises the following steps:

[0007] S1. Bar cutting: Select bar size and cutting weight according to the final product size;

[0008] S2, punching: heating the blank to 950-1200 degrees Celsius, keeping the temperature for 1 to 5 hours, then taking the blank out of the high-temperature gas furnace and transporting it to the press, upsetting and punching the blank;

[0009] S3, Ring rolling: The punched ring forging is heated to 900-1150 degrees Celsius, kept warm for 0.5 to 4 hours, and then the forging is taken out of the high-temperature gas furnace and transferred to the ring rolling mill for multi-fire rolling;

[0010] S4, molding: heating and heat preservation at 900-1150℃ for 0.5 to 4 hours, placing the straight-rolled blank into the molding barrel, and the upper table of the press moves downward to compress the product to the set height;

[0011] S5. Heat treatment: Solution annealing heat treatment at 1148-1204℃, holding time 1-3 hours, water cooling;

[0012] S6. Tissue performance test: room temperature tensile test, high temperature tensile test, [UTS (ksi) x Elongation (% in4D)] / 100, room temperature impact test, and microstructure test analysis.

[0013] Preferably, in step S3, the deformation amount is controlled within a range of 15%-40%.

[0014] Preferably, a high temperature gas furnace is used for heating in steps S2 and S3.

[0015] The beneficial effects of the present invention are as follows: the heat treatment of the present invention adopts solution annealing and high-temperature large deformation rolling, which solves the problem that [UTS (ksi) x Elongation (% in 4D)] / 100 is lower than the standard requirement, meets the product performance requirements of customers, improves the first-time pass rate, and improves market competitiveness. DETAILED DESCRIPTION

[0016] The technical solution protected by the present invention is described in detail below.

[0017] Example 1

[0018] A manufacturing process of an In625 forging with high energy absorption characteristics comprises the following steps:

[0019] S1. Bar cutting: Select bar size and cutting weight according to the final product size;

[0020] S2, punching: the blank is heated to 950 degrees Celsius in a high-temperature gas furnace and kept warm for 1 hour, then the blank is taken out of the high-temperature gas furnace and transported to a press to perform upsetting and punching on the blank;

[0021] S3, Ring rolling: Use a high-temperature gas furnace to heat the punched ring forging to 900 degrees Celsius, keep it warm for 0.5 hours, then take the forging out of the high-temperature gas furnace and transfer it to a ring rolling mill for multi-fire rolling, and the deformation is controlled at 15%;

[0022] S4, molding: heating and heat preservation at 900℃ for 0.5 hours, the direct-rolled blank is placed in the molding barrel, and the upper table of the press moves downward to compress the product to the set height;

[0023] S5. Heat treatment: Solution annealing heat treatment at 1148℃, holding time 1 hour, water cooling;

[0024] S6. Tissue performance test: room temperature tensile test, high temperature tensile test, [UTS (ksi) x Elongation (% in4D)] / 100, room temperature impact test, and microstructure test analysis.

[0025] Example 2

[0026] A manufacturing process of an In625 forging with high energy absorption characteristics comprises the following steps:

[0027] S1. Bar cutting: Select bar size and cutting weight according to the final product size;

[0028] S2, punching: the blank is heated to 1200 degrees Celsius in a high-temperature gas furnace and kept warm for 5 hours, then the blank is taken out of the high-temperature gas furnace and transported to a press, and the blank is upset and punched;

[0029] S3, Ring rolling: Use a high-temperature gas furnace to heat the punched ring forging to 1150 degrees Celsius, keep it warm for 4 hours, then take the forging out of the high-temperature gas furnace and transfer it to a ring rolling mill for multi-fire rolling, and the deformation is controlled at 40%;

[0030] S4, molding: heating and heat preservation at 1150℃ for 4 hours, placing the direct-rolled blank into the molding barrel, and the upper table of the press moves downward to compress the product to the set height;

[0031] S5. Heat treatment: Solution annealing heat treatment at 1204℃, holding time 3 hours, water cooling;

[0032] S6. Tissue performance test: room temperature tensile test, high temperature tensile test, [UTS (ksi) x Elongation (% in4D)] / 100, room temperature impact test, and microstructure test analysis.

[0033] Example 3

[0034] A manufacturing process of an In625 forging with high energy absorption characteristics comprises the following steps:

[0035] S1. Bar cutting: Select bar size and cutting weight according to the final product size;

[0036] S2, punching: the blank is heated to 1000 degrees Celsius in a high-temperature gas furnace and kept warm for 3 hours, then the blank is taken out of the high-temperature gas furnace and transported to a press to perform upsetting and punching on the blank;

[0037] S3, Ring rolling: Use a high-temperature gas furnace to heat the punched ring forging to 950 degrees Celsius, keep it warm for 2 hours, then take the forging out of the high-temperature gas furnace and transfer it to a ring rolling mill for multi-fire rolling, and the deformation is controlled at 15%-40%;

[0038] S4, molding: heating and heat preservation at 950℃ for 2 hours, placing the direct-rolled blank into the molding barrel, and the upper table of the press moves downward to compress the product to the set height;

[0039] S5. Heat treatment: Solution annealing heat treatment at 1166℃, holding time 2 hours, water cooling;

[0040] S6. Tissue performance test: room temperature tensile test, high temperature tensile test, [UTS (ksi) x Elongation (% in4D)] / 100, room temperature impact test, and microstructure test analysis.

[0041] 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 manufacturing process of In625 forgings with high energy absorption characteristics, characterized in that: The steps include: S1. Bar cutting: Select bar size and cutting weight according to the final product size; S2, punching: heating the blank to 950-1200 degrees Celsius, keeping the temperature for 1 to 5 hours, then taking the blank out of the high-temperature gas furnace and transporting it to the press, upsetting and punching the blank; S3, Ring rolling: The punched ring forging is heated to 900-1150 degrees Celsius, kept warm for 0.5 to 4 hours, and then the forging is taken out of the high-temperature gas furnace and transferred to the ring rolling mill for multi-fire rolling; S4, molding: heating and heat preservation at 900-1150℃ for 0.5 to 4 hours, placing the straight-rolled blank into the molding barrel, and the upper table of the press moves downward to compress the product to the set height; S5. Heat treatment: Solution annealing heat treatment at 1148-1204℃, holding time 1-3 hours, water cooling; S6. Tissue performance test: room temperature stretching, high temperature stretching, [UTS (ksi) x Elongation (% in 4D)] / 100, room temperature impact test, microstructure test and analysis.

2. The manufacturing process of an In625 forging with high energy absorption characteristics according to claim 1 is characterized in that: In step S3, the deformation amount is controlled within a range of 15%-40%.

3. The manufacturing process of an In625 forging with high energy absorption characteristics according to claim 2 is characterized in that: In steps S2 and S3, a high temperature gas furnace is used for heating.