CN103286248B - Forging method of 1Cr12Ni3MoVN annular forged piece - Google Patents

Forging method of 1Cr12Ni3MoVN annular forged piece Download PDF

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Publication number
CN103286248B
CN103286248B CN201310170226.1A CN201310170226A CN103286248B CN 103286248 B CN103286248 B CN 103286248B CN 201310170226 A CN201310170226 A CN 201310170226A CN 103286248 B CN103286248 B CN 103286248B
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forging
stock
annular
piece
heating furnace
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CN103286248A (en
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吕小茹
杨辉
孙雪松
徐昌
吴娟利
叶旭东
吴恺
王世泽
陈哲
许岗建
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AECC Aviation Power Co Ltd
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Xian Aviation Power Co Ltd
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Abstract

The invention belongs to the techniques of forging and particularly relates to a forging method of a 1Cr12Ni3MoVN annular forged piece. The method is characterized by including: cutting forging stock, heating the forging stock, upsetting the forging stock, punching the forging stock, chambering the forging stock, normalizing the annular forged piece, and annealing the annular forged piece. By the method, the forging difficulty of the 1Cr12Ni3MoVN stainless steel annular forged piece is solved, and the research requirements of novel aero-engines are satisfied.

Description

A kind of forging method of 1Cr12Ni3MoVN annular forging piece
Technical field
The invention belongs to FMT, relate to a kind of forging method of 1Cr12Ni3MoVN annular forging piece.
Background technology
1Cr12Ni3MoVN is a kind of 12% chromium type martensite refractory stainless steel.This steel has higher thermostrength, creep-resistant property, heat endurance, antioxygenic property and fatigue behaviour.Be applicable to the vitals such as the high-pressure compressor dish of manufacture aero-engine, rotor blade, spacer ring and sealing ring.For martensitic stain less steel, if heating-up temperature is too high, or forging deformation is too little or be out of shape uneven, then the tendentiousness forming massive martensite tissue and macroscopic coarse grain after cooling is very large, after forging heat treatment, often occurs macroscopic coarse grain and organize thick defect; If it is improper that the type of cooling controls, forging can be made to crack, cause forging to scrap.There is the annular forging piece of a lot of 1Cr12Ni3MoVN stainless steel material in certain type aero-engine, at present, do not retrieve the open source literature of 1Cr12Ni3MoVN annular forging piece forging method.Chinese patent application " method for forging thick-walled ring-shaped parts " CN102319855A discloses a kind of forging method of heavy wall annular element.This patent does not relate to forging, the heat treatment process parameter of concrete material, cannot meet the performance of such material to forging, the requirement of crystal grain, cannot meet the control overflow that such material prevents from forging rear cracking.
Summary of the invention
The object of the invention is: the forging method that a kind of 1Cr12Ni3MoVN stainless steel ring shape Forging is provided, to meet the development needs of novel aero-engine.
Technical scheme of the present invention is: a kind of forging method of 1Cr12Ni3MoVN annular forging piece, is characterized in that, the step of forging is as follows:
1, forging stock is cut: selecting band saw to cut bar becomes forging stock, the length of forging stock and diameter are according to the height of annular forging piece and Mass Calculation, the length of forging stock is 1.6 ~ 2 times of annular forging piece height, the quality of forging stock and the identical in quality of annular forging piece, obtain the external diameter of forging stock by the quality of ring shape Forging and the length of forging stock;
2, forging stock heating: forging stock is placed in heating furnace and heats, the process of heating is: first heating furnace is warming up to 1100 DEG C ~ 1150 DEG C, again forging stock is put into heating furnace, continue to be warming up to 1100 DEG C ~ 1150 DEG C, start insulation, according to forging stock THICKNESS CALCULATION temperature retention time, the every mm of thickness of forging stock is incubated 0.5 minute;
3, forging stock jumping-up: forging stock is taken out from heating furnace and is placed on forging hammer hammering block, upper ram falls, and limit rotates forging stock limit rapid strike, and forging stock is upset as round pie, and cake height is the height that annular forging piece drawing specifies, the deflection of forging stock is not less than 40%;
4, forging stock punching: put punching pin on the round pie forging stock that jumping-up is good, upper ram falls, and punching pin is pressed into forging stock, forging stock is overturn 180 °, then punching pin is placed on position, the center of circle, upper ram falls, forging stock is gone out the hole of φ 60mm ~ φ 100mm, makes forging stock form forging-ring;
5, forging-ring reaming: adopt plug to carry out reaming on forging hammer, be enclosed within by forging-ring on plug, hits forging-ring and rotates forging-ring, makes forging-ring endoporus and outside dimension meet drawing requirement and forms annular forging piece; Annular forging piece is not less than 30% at the deflection of radial direction;
6, annular forging piece normalizing: annular forging piece is placed in heating furnace and carries out normalized treatment, detailed process is: first heating furnace is warming up to 1000 DEG C ~ 1050 DEG C, again annular forging piece is put into heating furnace, temperature is kept to be 1000 DEG C ~ 1050 DEG C, temperature retention time is determined according to annular forging piece thickness, and the temperature retention time of every mm round forging thickness is 2min ~ 3min; After insulation terminates, take out forging, air cooling is to room temperature;
7, annular forging piece annealing: annular forging piece is placed in heating furnace and carries out annealing in process; Detailed process is: first heating furnace is warming up to 700 DEG C ~ 790 DEG C, again annular forging piece is put into heating furnace, start insulation, temperature retention time T calculates according to the following formula, T=70+T1, T1 is the time determined according to annular forging piece thickness, and T1=δ × λ, δ are the thickness of annular forging piece, unit is mm, λ is the temperature retention time of unit thickness, and unit is min/mm, λ=1 ~ 3; After insulation terminates, take out annular forging piece, air cooling is to room temperature.
Advantage of the present invention is: the forging method providing a kind of 1Cr12Ni3MoVN stainless steel ring shape Forging, solves a forging difficult problem for 1Cr12Ni3MoVN stainless steel ring shape Forging, meets the development needs of novel aero-engine.
Detailed description of the invention
Below the present invention is described in further details.A forging method for 1Cr12Ni3MoVN annular forging piece, is characterized in that, the step of forging is as follows:
1, forging stock is cut: selecting band saw to cut bar becomes forging stock, the length of forging stock and diameter are according to the height of annular forging piece and Mass Calculation, the length of forging stock is 1.6 ~ 2 times of annular forging piece height, the quality of forging stock and the identical in quality of annular forging piece, obtain the external diameter of forging stock by the quality of ring shape Forging and the length of forging stock;
2, forging stock heating: forging stock is placed in heating furnace and heats, the process of heating is: first heating furnace is warming up to 1100 DEG C ~ 1150 DEG C, again forging stock is put into heating furnace, continue to be warming up to 1100 DEG C ~ 1150 DEG C, start insulation, according to forging stock THICKNESS CALCULATION temperature retention time, the every mm of thickness of forging stock is incubated 0.5 minute;
3, forging stock jumping-up: forging stock is taken out from heating furnace and is placed on forging hammer hammering block, upper ram falls, and limit rotates forging stock limit rapid strike, and forging stock is upset as round pie, and cake height is the height that annular forging piece drawing specifies, the deflection of forging stock is not less than 40%;
4, forging stock punching: put punching pin on the round pie forging stock that jumping-up is good, upper ram falls, and punching pin is pressed into forging stock, forging stock is overturn 180 °, then punching pin is placed on position, the center of circle, upper ram falls, forging stock is gone out the hole of φ 60mm ~ φ 100mm, makes forging stock form forging-ring;
5, forging-ring reaming: adopt plug to carry out reaming on forging hammer, be enclosed within by forging-ring on plug, hits forging-ring and rotates forging-ring, makes forging-ring endoporus and outside dimension meet drawing requirement and forms annular forging piece; Annular forging piece is not less than 30% at the deflection of radial direction;
6, annular forging piece normalizing: annular forging piece is placed in heating furnace and carries out normalized treatment, detailed process is: first heating furnace is warming up to 1000 DEG C ~ 1050 DEG C, again annular forging piece is put into heating furnace, temperature is kept to be 1000 DEG C ~ 1050 DEG C, temperature retention time is determined according to annular forging piece thickness, and the temperature retention time of every mm round forging thickness is 2min ~ 3min; After insulation terminates, take out forging, air cooling is to room temperature;
7, annular forging piece annealing: annular forging piece is placed in heating furnace and carries out annealing in process; Detailed process is: first heating furnace is warming up to 700 DEG C ~ 790 DEG C, again annular forging piece is put into heating furnace, start insulation, temperature retention time T calculates according to the following formula, T=70+T1, T1 is the time determined according to annular forging piece thickness, and T1=δ × λ, δ are the thickness of annular forging piece, unit is mm, λ is the temperature retention time of unit thickness, and unit is min/mm, λ=1 ~ 3; After insulation terminates, take out annular forging piece, air cooling is to room temperature.
Embodiment 1
The present embodiment is the manufacture method for 1Cr12Ni3MoVN stainless steel ring shape Forging.Described annular forging piece external diameter 275mm, internal diameter 195mm, height 110mm.
1, forging stock is cut: according to the height dimension 110mm of annular forging piece, tentatively determine that the length of forging stock is 170mm ~ 220mm, according to the quality of forging stock and annular forging piece identical in quality, the diameter calculating forging stock should be ф 145mm ~ ф 165mm, comprehensively determines cutting forging stock ф 150mm × 205mm;
2, forging stock heating: forging stock ф 150mm × 205mm is placed in air furnace, and the process of heating is: first heating furnace is heated to 1100 DEG C, then forging stock is put into air furnace, and is warming up to 1100 DEG C, starts insulation, temperature retention time 75 minutes
3, forging stock jumping-up: forging stock is taken out from heating furnace and is placed on forging hammer hammering block, upper ram falls, and just rotate limit and hit forging stock, forging stock is upset as round pie, height is to 105mm;
4, forging stock punching: round pie forging stock is placed on forging hammer hammering block, punching pin put by round pie forging stock, upper ram falls, punching pin is pressed into forging stock, then forging stock is overturn 180 °, punching pin is placed on position, the center of circle, upper ram falls, blank is gone out the hole of a φ 60mm, makes forging stock form forging-ring, forging-ring size: ф 205mm × ф 60mm × 105mm;
5, forging-ring reaming; Forging hammer adopts plug carry out reaming, forging-ring is enclosed within plug, hit forging-ring and rotate forging-ring, making forging-ring size meet the requirement of forging final size, become annular forging piece, forging ' s block dimension: ф 275mm × ф 195mm × 110mm;
6, annular forging piece normalizing; Forging part is placed in heating furnace and carries out normalized treatment, detailed process is: first by heating furnace to 1000 DEG C, then annular forging piece is put into heating furnace, keeps temperature to be 1000 DEG C, is incubated 120 minutes; After insulation terminates, take out annular forging piece, be cooled to room temperature;
7, annular forging piece annealing; Annular forging piece is placed in heating furnace and carries out annealing in process; Detailed process is: first heating furnace is heated to 700 DEG C, then annular forging piece is put into heating furnace, is warming up to 700 DEG C, temperature retention time 150 minutes, and take out annular forging piece, air cooling is to room temperature.
Embodiment two
The present embodiment is the manufacture method for 1Cr12Ni3MoVN stainless steel annular element.Described annular element external diameter 350mm, internal diameter 210mm, height 120mm.
1, forging stock is cut: according to the height dimension 120mm of annular forging piece, tentatively determine that the length of forging stock is 180mm ~ 240mm, according to the quality of forging stock and annular forging piece identical in quality, the diameter calculating forging stock should be ф 240mm ~ ф 205mm, comprehensively determines cutting forging stock ф 220mm × 215mm;
2, forging stock heating: forging stock ф 220mm × 215mm is placed in heating furnace, and the process of heating is: first heating furnace is heated to 1120 DEG C, then forging stock is put into heating furnace, and is warming up to 1120 DEG C, starts insulation, temperature retention time 120 minutes;
3, forging stock jumping-up: forging stock is taken out from heating furnace and is placed on forging hammer hammering block, upper ram falls, and just rotate limit and hit forging stock, forging stock is upset as round pie, height is to 115mm;
4, forging stock punching: round pie forging stock is placed on forging hammer hammering block, punching pin put by round pie forging stock, upper ram falls, punching pin is pressed into forging stock, then forging stock is overturn 180 °, punching pin is placed on position, the center of circle, upper ram falls, blank is gone out the hole of a φ 90mm, makes forging stock form forging-ring, forging-ring size: ф 300mm × ф 90mm × 115mm;
5, forging-ring reaming; Forging hammer adopts plug carry out reaming, forging-ring is enclosed within plug, hit forging-ring and rotate forging-ring, making forging-ring size meet the requirement of forging final size, become annular forging piece, forging ' s block dimension: ф 350mm × ф 210mm × 120mm;
6, annular forging piece normalizing; Forging part is placed in heating furnace and carries out normalized treatment, detailed process is: first by heating furnace to 1030 DEG C, then annular forging piece is put into heating furnace, keeps temperature to be 1030 DEG C, is incubated 210 minutes; After insulation terminates, take out annular forging piece, be cooled to room temperature;
7, annular forging piece annealing; Annular forging piece is placed in heating furnace and carries out annealing in process; Detailed process is: first heating furnace is heated to 750 DEG C, then annular forging piece is put into heating furnace, is warming up to 750 DEG C, temperature retention time 210 minutes, and take out annular forging piece, air cooling is to room temperature.
Embodiment three
The present embodiment is the manufacture method for 1Cr12Ni3MoVN stainless steel annular element.Described annular element external diameter 370mm, internal diameter 220mm, height 115mm.
1, forging stock is cut: according to the height dimension 110mm of annular forging piece, tentatively determine that the length of forging stock is 170mm ~ 230mm, according to the quality of forging stock and annular forging piece identical in quality, the diameter calculating forging stock should be ф 260mm ~ ф 225mm, comprehensively determines cutting forging stock ф 250mm × 180mm;
2, forging stock heating: forging stock ф 250mm × 180mm is placed in heating furnace, and the process of heating is: first air furnace is heated to 1150 DEG C, then forging stock is put into heating furnace, and is warming up to 1150 DEG C, starts insulation, temperature retention time 90 minutes;
3, forging stock jumping-up: forging stock is taken out from heating furnace and is placed on forging hammer hammering block, upper ram falls, and just rotate limit and hit forging stock, forging stock is upset as round pie, height is to 110mm;
4, forging stock punching: round pie forging stock is placed on forging hammer hammering block, punching pin put by round pie forging stock, upper ram falls, punching pin is pressed into forging stock, then forging stock is overturn 180 °, punching pin is placed on position, the center of circle, upper ram falls, blank is gone out the hole of a φ 80mm, makes forging stock form forging-ring, forging-ring size: ф 300mm × ф 80mm × 110mm;
5, forging-ring reaming; Forging hammer adopts plug carry out reaming, forging-ring is enclosed within plug, hit forging-ring and rotate forging-ring, making forging-ring size meet the requirement of forging final size, become annular forging piece, forging ' s block dimension: ф 370mm × ф 220mm × 115mm;
6, annular forging piece normalizing; Forging part is placed in heating furnace and carries out normalized treatment, detailed process is: first by heating furnace to 1050 DEG C, then annular forging piece is put into heating furnace, keeps temperature to be 1050 DEG C, is incubated 220 minutes; After insulation terminates, take out annular forging piece, be cooled to room temperature;
7, annular forging piece annealing; Annular forging piece is placed in heating furnace and carries out annealing in process; Detailed process is: first heating furnace is heated to 750 DEG C, then annular forging piece is put into heating furnace, is warming up to 750 DEG C, temperature retention time 220 minutes, and take out annular forging piece, air cooling is to room temperature.

Claims (1)

1. a forging method for 1Cr12Ni3MoVN annular forging piece, is characterized in that, the step of forging is as follows:
1.1, forging stock is cut: selecting band saw to cut bar becomes forging stock, the length of forging stock and diameter are according to the height of annular forging piece and Mass Calculation, the length of forging stock is 1.6 ~ 2 times of annular forging piece height, the quality of forging stock and the identical in quality of annular forging piece, obtain the external diameter of forging stock by the quality of ring shape Forging and the length of forging stock;
1.2, forging stock heating: forging stock is placed in heating furnace and heats, the process of heating is: first heating furnace is warming up to 1100 DEG C ~ 1150 DEG C, again forging stock is put into heating furnace, continue to be warming up to 1100 DEG C ~ 1150 DEG C, start insulation, according to forging stock THICKNESS CALCULATION temperature retention time, the every mm of thickness of forging stock is incubated 0.5 minute;
1.3, forging stock jumping-up: forging stock is taken out from heating furnace and is placed on forging hammer hammering block, upper ram falls, and limit rotates forging stock limit rapid strike, and forging stock is upset as round pie, and cake height is the height that annular forging piece drawing specifies, the deflection of forging stock is not less than 40%;
1.4, forging stock punching: put punching pin on the round pie forging stock that jumping-up is good, upper ram falls, and punching pin is pressed into forging stock, forging stock is overturn 180 °, then punching pin is placed on position, the center of circle, upper ram falls, forging stock is gone out the hole of φ 60mm ~ φ 100mm, makes forging stock form forging-ring;
1.5, forging-ring reaming: adopt plug to carry out reaming on forging hammer, be enclosed within by forging-ring on plug, hits forging-ring and rotates forging-ring, makes forging-ring endoporus and outside dimension meet drawing requirement and forms annular forging piece; Annular forging piece is not less than 30% at the deflection of radial direction;
1.6, annular forging piece normalizing: annular forging piece is placed in heating furnace and carries out normalized treatment, detailed process is: first heating furnace is warming up to 1000 DEG C ~ 1050 DEG C, again annular forging piece is put into heating furnace, temperature is kept to be 1000 DEG C ~ 1050 DEG C, temperature retention time is determined according to annular forging piece thickness, and the temperature retention time of every mm round forging thickness is 2min ~ 3min; After insulation terminates, take out forging, air cooling is to room temperature;
1.7, annular forging piece annealing: annular forging piece is placed in heating furnace and carries out annealing in process; Detailed process is: first heating furnace is warming up to 700 DEG C ~ 790 DEG C, again annular forging piece is put into heating furnace, start insulation, temperature retention time T calculates according to the following formula, T=70+T1, T1 is the time determined according to annular forging piece thickness, and T1=δ × λ, δ are the thickness of annular forging piece, unit is mm, λ is the temperature retention time of unit thickness, and unit is min/mm, λ=1 ~ 3; After insulation terminates, take out annular forging piece, air cooling is to room temperature.
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CN100436045C (en) * 2007-02-08 2008-11-26 范承祥 Manufacturing method for annular forging piece
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