CN106078090A - A kind of Forging Technology of large axis forging - Google Patents
A kind of Forging Technology of large axis forging Download PDFInfo
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- CN106078090A CN106078090A CN201610454015.4A CN201610454015A CN106078090A CN 106078090 A CN106078090 A CN 106078090A CN 201610454015 A CN201610454015 A CN 201610454015A CN 106078090 A CN106078090 A CN 106078090A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The Forging Technology of a kind of large axis forging, belongs to large axis forging processing technique field, and this technique is to comprise the steps of: (1) selects blank, excision rising head and the mouth of a river；(2) blank is loaded in stove, between blank, leave gap；(3) once being heated by the blank in stove, then carry out an isothermal holding, then carry out jumping-up and pulling, forging ratio is 4～5；(4) carrying out post bake, then carry out secondary isothermal holding, then carry out jumping-up and pulling, forging ratio is 3～4；(5) carrying out three heating, then carry out three isothermal holding, then carry out jumping-up and pulling, forging ratio is 1.8～3.1；(6) large axis forging is carried out immediately normalized treatment.The large axis forging surface of the present invention and inside do not have crackle；The large axis forging chemical composition of the present invention is uniform, Stability Analysis of Structures；The large axis forging good product quality of the present invention, economic well-being of workers and staff is high.
Description
Technical field
The invention belongs to large axis forging processing technique field, particularly relate to the forging work of a kind of large axis forging
Skill.
Background technology
In open die forging industry, forging large axis forging is the most common, but typically uses whole when forging large axis forging
Steel ingot blanking, often occurs that forging ultrasonic examination is defective, and face crack finds the most often.And crackle is the most tiny, and
After roughing may secondary see before there is no the face crack that finds, careful people is it can be seen that this situation majority occurs in
The rising head end of steel ingot, because rising head impurity is many, surface quality is wiped, surface irregularity, easily produces embrittlement in forging process,
Forging surface is occurred in the form of face crack, the surface of large axis forging and underbead crack, affect product quality.
Summary of the invention
The technical problem to be solved is to provide the Forging Technology of a kind of large axis forging.
For solving the problems referred to above, the Forging Technology of a kind of large axis forging of the present invention, this technique is by following
Step forms:
(1) selecting blank, excision rising head and the mouth of a river, resection is 5～20%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 4～20mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1100～1300 DEG C, the most once protects
Temperature processes, and one time holding temperature is 1100～1300 DEG C, and one time temperature retention time is 20～30 minutes, then carries out jumping-up and pulls out
Long, forging ratio is 4～5；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1000～1100 DEG C, then enters
Row secondary isothermal holding, secondary holding temperature is 1000～1100 DEG C, and secondary temperature retention time is 40～60 minutes, then carries out upsetting
Thick and pulling, forging ratio is 3～4；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 600～850 DEG C, then carries out
Three isothermal holding, three times holding temperature is 600～850 DEG C, and three times temperature retention time is 1～2 hour, then carries out jumping-up and pulls out
Long, forging ratio is 1.8～3.1, it is to avoid product cause crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and
Affect product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate forging process
In internal stress, crystal grain thinning.
Compared with prior art, the invention have the advantages that large axis forging surface and the inside of the present invention do not have
Crackle；The large axis forging chemical composition of the present invention is uniform, Stability Analysis of Structures；The large axis forging product quality of the present invention
Good, economic well-being of workers and staff is high.
Detailed description of the invention
Embodiment 1
A kind of Forging Technology of large axis forging, this technique is to comprise the steps of:
(1) selecting blank, excision rising head and the mouth of a river, resection is 5%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 4mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1100 DEG C, then carries out at once insulation
Reason, one time holding temperature is 1100 DEG C, and one time temperature retention time is 20 minutes, then carries out jumping-up and pulling, and forging ratio is 4；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1000 DEG C, then carries out secondary
Isothermal holding, secondary holding temperature is 1000 DEG C, and secondary temperature retention time is 40 minutes, then carries out jumping-up and pulling, forging ratio
It is 3；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 600 DEG C, then carries out three times
Isothermal holding, three times holding temperature is 600 DEG C, and three times temperature retention time is 1 hour, then carries out jumping-up and pulling, and forging ratio is
1.8, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate forging process
In internal stress, crystal grain thinning.
It is demonstrated experimentally that surface and the inside of large axis forging do not have crackle under this parameter；The chemistry of large axis forging
Composition is more uniform；The good product quality of large axis forging.
Embodiment 2
A kind of Forging Technology of large axis forging, this technique is to comprise the steps of:
(1) selecting blank, excision rising head and the mouth of a river, resection is 9%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 8mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1150 DEG C, then carries out at once insulation
Reason, one time holding temperature is 1150 DEG C, and one time temperature retention time is 22 minutes, then carries out jumping-up and pulling, and forging ratio is 4.3；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1025 DEG C, then carries out secondary
Isothermal holding, secondary holding temperature is 1025 DEG C, and secondary temperature retention time is 45 minutes, then carries out jumping-up and pulling, forging ratio
It is 3.3；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 660 DEG C, then carries out three times
Isothermal holding, three times holding temperature is 660 DEG C, and three times temperature retention time is 1.2 hours, then carries out jumping-up and pulling, forging ratio
It is 2.1, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate forging process
In internal stress, crystal grain thinning.
It is demonstrated experimentally that surface and the inside of large axis forging do not have crackle under this parameter；The chemistry of large axis forging
Composition is more uniform；The product quality of large axis forging is preferable.
Embodiment 3
A kind of Forging Technology of large axis forging, this technique is to comprise the steps of:
(1) selecting blank, excision rising head and the mouth of a river, resection is 13%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 12mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1200 DEG C, then carries out at once insulation
Reason, one time holding temperature is 1200 DEG C, and one time temperature retention time is 25 minutes, then carries out jumping-up and pulling, and forging ratio is 4.5；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1050 DEG C, then carries out secondary
Isothermal holding, secondary holding temperature is 1050 DEG C, and secondary temperature retention time is 50 minutes, then carries out jumping-up and pulling, forging ratio
It is 3.5；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 725 DEG C, then carries out three times
Isothermal holding, three times holding temperature is 725 DEG C, and three times temperature retention time is 1.5 hours, then carries out jumping-up and pulling, forging ratio
It is 2.5, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate forging process
In internal stress, crystal grain thinning.
It is demonstrated experimentally that surface and the inside of large axis forging do not have crackle under this parameter；The chemistry of large axis forging
Composition is the most uniform；The product quality of large axis forging is best.
Therefore, the present embodiment is preferred embodiment.
Embodiment 4
A kind of Forging Technology of large axis forging, this technique is to comprise the steps of:
(1) selecting blank, excision rising head and the mouth of a river, resection is 17%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 16mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1250 DEG C, then carries out at once insulation
Reason, one time holding temperature is 1250 DEG C, and one time temperature retention time is 27 minutes, then carries out jumping-up and pulling, and forging ratio is 4.7；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1070 DEG C, then carries out secondary
Isothermal holding, secondary holding temperature is 1070 DEG C, and secondary temperature retention time is 55 minutes, then carries out jumping-up and pulling, forging ratio
It is 3.7；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 785 DEG C, then carries out three times
Isothermal holding, three times holding temperature is 785 DEG C, and three times temperature retention time is 1.8 hours, then carries out jumping-up and pulling, forging ratio
It is 2.8, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate forging process
In internal stress, crystal grain thinning.
It is demonstrated experimentally that surface and the inside of large axis forging do not have crackle under this parameter；The chemistry of large axis forging
Composition is uniform；The product quality of large axis forging is preferable.
Embodiment 5
A kind of Forging Technology of large axis forging, this technique is to comprise the steps of:
(1) selecting blank, excision rising head and the mouth of a river, resection is 20%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 20mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1300 DEG C, then carries out at once insulation
Reason, one time holding temperature is 1300 DEG C, and one time temperature retention time is 30 minutes, then carries out jumping-up and pulling, and forging ratio is 5；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1100 DEG C, then carries out secondary
Isothermal holding, secondary holding temperature is 1100 DEG C, and secondary temperature retention time is 60 minutes, then carries out jumping-up and pulling, forging ratio
It is 4；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 850 DEG C, then carries out three times
Isothermal holding, three times holding temperature is 850 DEG C, and three times temperature retention time is 2 hours, then carries out jumping-up and pulling, and forging ratio is
3.1, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate forging process
In internal stress, crystal grain thinning.
It is demonstrated experimentally that surface and the inside of large axis forging do not have crackle under this parameter；The chemistry of large axis forging
Composition is uniform；The good product quality of large axis forging.
Claims (6)
1. the Forging Technology of a large axis forging, it is characterised in that: this technique is to comprise the steps of:
(1) selecting blank, excision rising head and the mouth of a river, resection is 5～20%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 4～20mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1100～1300 DEG C, then carries out at once insulation
Reason, one time holding temperature is 1100～1300 DEG C, and one time temperature retention time is 20～30 minutes, then carries out jumping-up and pulling, forging
Make ratio for 4～5；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1000～1100 DEG C, then carries out two
Secondary isothermal holding, secondary holding temperature is 1000～1100 DEG C, and secondary temperature retention time is 40～60 minutes, then carry out jumping-up and
Pulling, forging ratio is 3～4；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 600～850 DEG C, then carries out three times
Isothermal holding, three times holding temperature is 600～850 DEG C, and three times temperature retention time is 1～2 hour, then carries out jumping-up and pulling,
Forging ratio is 1.8～3.1, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects
Product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate in forging process
Internal stress, crystal grain thinning.
A kind of Forging Technology of large axis forging, it is characterised in that: this technique is by following step
Rapid composition:
(1) selecting blank, excision rising head and the mouth of a river, resection is 5%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 4mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1100 DEG C, then carries out an isothermal holding, one
Secondary holding temperature is 1100 DEG C, and one time temperature retention time is 20 minutes, then carries out jumping-up and pulling, and forging ratio is 4；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1000 DEG C, then carries out secondary insulation
Processing, secondary holding temperature is 1000 DEG C, and secondary temperature retention time is 40 minutes, then carries out jumping-up and pulling, and forging ratio is 3；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 600 DEG C, then carries out three insulations
Processing, three times holding temperature is 600 DEG C, and three times temperature retention time is 1 hour, then carries out jumping-up and pulling, and forging ratio is 1.8,
Product is avoided to cause crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate in forging process
Internal stress, crystal grain thinning.
A kind of Forging Technology of large axis forging, it is characterised in that: this technique is by following step
Rapid composition:
(1) selecting blank, excision rising head and the mouth of a river, resection is 9%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 8mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1150 DEG C, then carries out an isothermal holding, one
Secondary holding temperature is 1150 DEG C, and one time temperature retention time is 22 minutes, then carries out jumping-up and pulling, and forging ratio is 4.3；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1025 DEG C, then carries out secondary insulation
Processing, secondary holding temperature is 1025 DEG C, and secondary temperature retention time is 45 minutes, then carries out jumping-up and pulling, and forging ratio is
3.3；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 660 DEG C, then carries out three insulations
Processing, three times holding temperature is 660 DEG C, and three times temperature retention time is 1.2 hours, then carries out jumping-up and pulling, and forging ratio is
2.1, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate in forging process
Internal stress, crystal grain thinning.
A kind of Forging Technology of large axis forging, it is characterised in that: this technique is by following step
Rapid composition:
(1) selecting blank, excision rising head and the mouth of a river, resection is 13%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 12mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1200 DEG C, then carries out an isothermal holding, one
Secondary holding temperature is 1200 DEG C, and one time temperature retention time is 25 minutes, then carries out jumping-up and pulling, and forging ratio is 4.5；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1050 DEG C, then carries out secondary insulation
Processing, secondary holding temperature is 1050 DEG C, and secondary temperature retention time is 50 minutes, then carries out jumping-up and pulling, and forging ratio is
3.5；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 725 DEG C, then carries out three insulations
Processing, three times holding temperature is 725 DEG C, and three times temperature retention time is 1.5 hours, then carries out jumping-up and pulling, and forging ratio is
2.5, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate in forging process
Internal stress, crystal grain thinning.
A kind of Forging Technology of large axis forging, it is characterised in that: this technique is by following step
Rapid composition:
(1) selecting blank, excision rising head and the mouth of a river, resection is 17%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 16mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1250 DEG C, then carries out an isothermal holding, one
Secondary holding temperature is 1250 DEG C, and one time temperature retention time is 27 minutes, then carries out jumping-up and pulling, and forging ratio is 4.7；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1070 DEG C, then carries out secondary insulation
Processing, secondary holding temperature is 1070 DEG C, and secondary temperature retention time is 55 minutes, then carries out jumping-up and pulling, and forging ratio is
3.7；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 785 DEG C, then carries out three insulations
Processing, three times holding temperature is 785 DEG C, and three times temperature retention time is 1.8 hours, then carries out jumping-up and pulling, and forging ratio is
2.8, it is to avoid product causes crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate in forging process
Internal stress, crystal grain thinning.
A kind of Forging Technology of large axis forging, it is characterised in that: this technique is by following step
Rapid composition:
(1) selecting blank, excision rising head and the mouth of a river, resection is 20%；
(2) loading in stove by blank, leave gap between blank, clearance distance is 20mm；
(3) once being heated by the blank in stove, one time heating-up temperature is 1300 DEG C, then carries out an isothermal holding, one
Secondary holding temperature is 1300 DEG C, and one time temperature retention time is 30 minutes, then carries out jumping-up and pulling, and forging ratio is 5；
(4) large axis forging in stove carrying out post bake, post bake temperature is 1100 DEG C, then carries out secondary insulation
Processing, secondary holding temperature is 1100 DEG C, and secondary temperature retention time is 60 minutes, then carries out jumping-up and pulling, and forging ratio is 4；
(5) large axis forging in stove carries out three heating, and three times heating-up temperature is 850 DEG C, then carries out three insulations
Processing, three times holding temperature is 850 DEG C, and three times temperature retention time is 2 hours, then carries out jumping-up and pulling, and forging ratio is 3.1,
Product is avoided to cause crystal grain drastically to be grown up because the too high and last deformation of final forging temperature is too small and affects product quality；
(6) large axis forging after jumping-up in step (5) and pulling is carried out normalized treatment immediately, eliminate in forging process
Internal stress, crystal grain thinning.
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| CN107649834A (en) * | 2017-09-19 | 2018-02-02 | 无锡宏达重工股份有限公司 | A kind of manufacturing process of carbon steel forged shaft peculiar to vessel |
| CN107913962A (en) * | 2017-12-05 | 2018-04-17 | 燕山大学 | Suppress the method for large forgings hot forging face checking |
| CN108220802A (en) * | 2017-02-16 | 2018-06-29 | 中国科学院金属研究所 | It is a kind of suitable for modified 9Ni materials of big section members and preparation method thereof |
| CN108754519A (en) * | 2018-06-28 | 2018-11-06 | 江阴市恒润重工股份有限公司 | The processing technology of LNG plant ultralow temperature stainless steel forgings |
| CN109759530A (en) * | 2019-01-22 | 2019-05-17 | 宋鑫 | A kind of production technology of the pump head body for oil-gas mining |
| CN113106351A (en) * | 2021-04-20 | 2021-07-13 | 吉安锐迈管道配件有限公司 | Ultralow-temperature 9Ni steel and preparation process thereof |
| CN115740314A (en) * | 2022-11-24 | 2023-03-07 | 南京工程学院 | Anti-cracking and energy-saving forging process for high-strength large-scale forging |
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| CN107649834A (en) * | 2017-09-19 | 2018-02-02 | 无锡宏达重工股份有限公司 | A kind of manufacturing process of carbon steel forged shaft peculiar to vessel |
| CN107913962A (en) * | 2017-12-05 | 2018-04-17 | 燕山大学 | Suppress the method for large forgings hot forging face checking |
| CN107913962B (en) * | 2017-12-05 | 2019-05-28 | 燕山大学 | Inhibit the method for large forgings hot forging face checking |
| CN108754519A (en) * | 2018-06-28 | 2018-11-06 | 江阴市恒润重工股份有限公司 | The processing technology of LNG plant ultralow temperature stainless steel forgings |
| CN109759530A (en) * | 2019-01-22 | 2019-05-17 | 宋鑫 | A kind of production technology of the pump head body for oil-gas mining |
| CN113106351A (en) * | 2021-04-20 | 2021-07-13 | 吉安锐迈管道配件有限公司 | Ultralow-temperature 9Ni steel and preparation process thereof |
| CN115740314A (en) * | 2022-11-24 | 2023-03-07 | 南京工程学院 | Anti-cracking and energy-saving forging process for high-strength large-scale forging |
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