Processing technology of I909 special-shaped ring forge piece

Abstract

The invention provides a machining process of an I909 special-shaped ring forge piece. The machining process comprises the following steps that S1, a bar is cut; s2, punching and flattening; s3, multi-heating-number ring rolling is carried out; s4, one-heating-number ring rolling shaping is carried out; s5, heat treatment; and S6, performance testing. By reducing the rolling temperature of the last heating number, the problem that the mechanical property of the forging process of the I909 alloy annular forge piece is unqualified is solved, the room-temperature and high-temperature tensile properties are greatly improved, and data are stable.

Description

Technical Field

[0001] The invention relates to the field of alloy processing, in particular to a processing technology of I909 special-shaped ring forgings. Background Art

[0002] I909 alloy is a Fe-Ni-Co based precipitation hardening deformation high temperature alloy, its use temperature is lower than 650℃. It has excellent high temperature resistance, oxidation resistance and creep resistance.

[0003] The production process of I909 material ring parts usually involves shearing the material to a certain size, performing heat treatment, and then forming it through upsetting and ring rolling (using the same temperature for each ring rolling) to obtain products that meet the size requirements. Finally, solution and aging heat treatment are performed according to material standards.

[0004] However, the mechanical properties of products produced by existing production processes are unstable, and the critical value of high-temperature tensile yield strength makes them very prone to failure. Summary of the invention

[0005] To solve the above problems, the present invention proposes a processing technology for I909 special-shaped ring forgings, which solves the problem of unqualified mechanical properties of I909 alloy ring forgings in the forging process, greatly improves the room temperature and high temperature tensile properties, and the data is stable.

[0006] The main contents of the present invention include:

[0007] A processing technology for I909 special-shaped ring forgings comprises the following steps:

[0008] S1. Bar cutting: Select appropriate bar diameter and length according to product requirements, cut a certain weight, and obtain blanks;

[0009] S2, punching and flattening: the blank is heated and kept at 950-1300°C, then roughened, and a hole with a suitable diameter is selected according to the weight to obtain a punched ring-shaped part;

[0010] S3, ring rolling: the ring parts are heated and kept at 850℃-1250℃, and then subjected to multiple fire rolling to obtain primary ring forgings;

[0011] S4, ring rolling and shaping: the initial ring forging is heated and kept at 750℃-1100℃, and then subjected to one-time hot rolling to obtain the final ring forging;

[0012] S5. Heat treatment: heat the final ring forgings at a solution temperature of 968°C-1010°C for one hour; then perform aging treatment at an aging temperature of 745°C for 4 hours, then cool to 620°C for 4 hours, and then air cool to room temperature;

[0013] S6. Performance test: Perform high temperature stretching and room temperature stretching performance tests on the product;

[0014] Among them, the heating temperature in S4 is lower than the heating temperature in S3.

[0015] Preferably, the rolling deformation in S3 is controlled within a range of 10%-45%.

[0016] Preferably, in S3, a gas-fired forging furnace is used to heat the punched ring-shaped part and keep it warm for 0.1 to 5 hours. Then, the ring-shaped part product is taken out of the gas-fired 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-fire rolling on the ring-shaped part to obtain a primary ring forging.

[0017] Preferably, the deformation amount in S4 is controlled within a range of 15%-40%.

[0018] Preferably, the primary ring forging is heated and heated in a gas forging furnace for 0.1 to 4 hours, and then the primary 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, and the ring rolling mill is used to perform a single-fire rolling on the ring product to obtain a final ring forging.

[0019] The beneficial effects of the present invention are:

[0020] Compared with the existing process, the new process improves the room temperature and high temperature tensile properties of the product;

[0021] Room temperature tensile strength: tensile strength increased from 175 ksi to 194 ksi; yield strength increased from 130 ksi to 154 ksi;

[0022] High temperature tensile: tensile strength increased from 130ksi to 147ksi; yield strength increased from 105ksi to 125ksi;

[0023] It meets the product performance requirements of different customers, saves costs and improves the first-time pass rate. DETAILED DESCRIPTION

[0024] The technical solution protected by the present invention is described in detail below.

[0025] Example 1

[0026] A processing technology for I909 special-shaped ring forgings comprises the following steps:

[0027] S1. Bar cutting: Select appropriate bar diameter and length according to product requirements, cut a certain weight, and obtain blanks;

[0028] S2. Punching and flattening: The blank is heated to 950°C in a gas forging furnace and kept warm for 1 hour. Then the blank is taken out of the gas forging furnace and transferred to a press. The transfer time is controlled within 120 seconds. The blank is roughened by a press and a hole with a suitable diameter is selected according to the weight. The operation time is controlled within 300 seconds to obtain a punched ring-shaped part.

[0029] S3, ring rolling: the ring parts after punching are heated to 850°C in a gas forging furnace and kept warm for 2 hours, then the ring parts are taken out of the gas forging furnace and transferred to a ring rolling machine. The transfer time is controlled within 120 seconds. The ring rolling machine is used to perform multiple rounds of rolling on the ring parts, and the deformation of each round of rolling is controlled to be 10% to obtain the initial ring forgings;

[0030] S4, Ring rolling shaping: Use a gas forging furnace to heat the initial ring forging to 750℃, keep it warm for 2 hours, then take the initial ring forging out of the gas forging furnace and transfer it to the ring rolling mill. The transfer time is controlled within 120S. Use the ring rolling mill to roll the ring product once, control the rolling deformation at 35%, and obtain the final ring forging. ;

[0031] S5. Heat treatment: heat the final ring forgings at a solution temperature of 968°C for one hour; then perform aging treatment at an aging temperature of 745°C for 4 hours, then cool to 620°C for 4 hours, and then air cool to room temperature;

[0032] S6. Performance test: Perform high temperature stretching and room temperature stretching performance tests on the product.

[0033] Example 2

[0034] A processing technology for I909 special-shaped ring forgings comprises the following steps:

[0035] S1. Bar cutting: Select appropriate bar diameter and length according to product requirements, cut a certain weight, and obtain blanks;

[0036] S2. Punching and flattening: The blank is heated to 1300°C in a gas forging furnace and kept warm for 1 hour. Then the blank is taken out of the gas forging furnace and transferred to a press. The transfer time is controlled within 60 seconds. The blank is roughened by a press and a hole with a suitable diameter is selected according to the weight. The operation time is controlled within 300 seconds to obtain a punched ring-shaped part.

[0037] S3, ring rolling: the ring parts after punching are heated to 1250°C in a gas forging furnace, and kept warm for 0.5 hours. Then the ring parts are taken out of the gas forging furnace and transferred to a ring rolling machine. The transfer time is controlled within 120 seconds. The ring rolling machine is used to perform multiple rounds of rolling on the ring parts. The deformation of each round of rolling is controlled to be 40%, and the initial ring forging is obtained.

[0038] S4, ring rolling shaping: use a gas forging furnace to heat the initial ring forging to 1100 ° C, keep it warm for 0.5 hours, then take the initial ring forging out of the gas forging furnace and transfer it to the ring rolling mill. The transfer time is controlled within 120S. Use the ring rolling mill to roll the ring product once, control the rolling deformation at 15%, and obtain the final ring forging.

[0039] S5. Heat treatment: heat the final ring forgings at a solution temperature of 1010°C for one hour; then perform aging treatment at an aging temperature of 745°C for 4 hours, then cool to 620°C for 4 hours, and then air cool to room temperature;

[0040] S6. Performance test: Perform high temperature stretching and room temperature stretching performance tests on the product.

[0041] Example 3

[0042] A processing technology for I909 special-shaped ring forgings comprises the following steps:

[0043] S1. Bar cutting: Select appropriate bar diameter and length according to product requirements, cut a certain weight, and obtain blanks;

[0044] S2. Punching and flattening: The blank is heated to 1140°C in a gas forging furnace and kept warm for 1 hour. Then the blank is taken out of the gas forging furnace and transferred to a press. The transfer time is controlled within 120 seconds. The blank is roughened by a press and a hole with a suitable diameter is selected according to the weight. The operation time is controlled within 300 seconds to obtain a punched ring-shaped part.

[0045] S3, ring rolling: the ring parts after punching are heated to 950°C in a gas forging furnace and kept warm for 0.5 hours, then the ring parts are 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 on the ring parts, and the deformation of each round of rolling is controlled to be 15% to obtain the initial ring forgings;

[0046] S4, Ring rolling shaping: Use a gas forging furnace to heat the initial ring forging to 900℃, keep it warm for 0.5 hours, then take the initial ring forging out of the gas forging furnace and transfer it to the ring rolling mill. The transfer time is controlled within 120S. Use the ring rolling mill to roll the ring product once, control the rolling deformation at 40%, and obtain the final ring forging. ;

[0047] S5. Heat treatment: heat the final ring forgings at a solution temperature of 978°C for one hour; then perform aging treatment at an aging temperature of 745°C for 4 hours, then cool to 620°C for 4 hours, and then air cool to room temperature;

[0048] S6. Performance test: Perform high temperature stretching and room temperature stretching performance tests on the product.

[0049] 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 I909 special-shaped ring forgings, characterized in that: The steps include: S1. Bar cutting: Select appropriate bar diameter and length according to product requirements, cut a certain weight, and obtain blanks; S2, punching and flattening: the blank is heated and kept at 950-1300°C, then roughened, and a hole with a suitable diameter is selected according to the weight to obtain a punched ring-shaped part; S3, ring rolling: the ring parts are heated and kept at 850℃-1250℃, and then subjected to multiple fire rolling to obtain primary ring forgings; S4, ring rolling and shaping: the initial ring forging is heated and kept at 750℃-1100℃, and then subjected to one-time hot rolling to obtain the final ring forging; S5. Heat treatment: heat the final ring forgings at a solution temperature of 968°C-1010°C for one hour; then perform aging treatment at an aging temperature of 745°C for 4 hours, then cool to 620°C for 4 hours, and then air cool to room temperature; S6. Performance test: Perform high temperature stretching and room temperature stretching performance tests on the product; Among them, the heating temperature in S4 is lower than the heating temperature in S3.

2. The processing technology of I909 special-shaped ring forging according to claim 1 is characterized in that: The rolling deformation in S3 is controlled within a range of 10%-45%.

3. The processing technology of I909 special-shaped ring forging according to claim 2 is characterized in that: In S3, a gas-fired forging furnace is used to heat the punched ring parts and keep them warm for 0.1 to 5 hours. The ring parts are then taken out of the gas-fired 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-fire rolling on the ring parts to obtain primary ring forgings.

4. The processing technology of I909 special-shaped ring forging according to claim 1 is characterized in that: The deformation in S4 is controlled at 15%-40%.

5. The processing technology of I909 special-shaped ring forging according to claim 4 is characterized in that: The primary ring forging is heated and heated in a gas forging furnace for 0.1 to 4 hours, and then the primary 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 perform one-time rolling on the ring product to obtain a final ring forging.