CN102689152B - Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections - Google Patents

Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections Download PDF

Info

Publication number
CN102689152B
CN102689152B CN201210200471.8A CN201210200471A CN102689152B CN 102689152 B CN102689152 B CN 102689152B CN 201210200471 A CN201210200471 A CN 201210200471A CN 102689152 B CN102689152 B CN 102689152B
Authority
CN
China
Prior art keywords
rolling
liquid
ring
forging
aluminium alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201210200471.8A
Other languages
Chinese (zh)
Other versions
CN102689152A (en
Inventor
李路
王放
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southwest University
Original Assignee
Southwest University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southwest University filed Critical Southwest University
Priority to CN201210200471.8A priority Critical patent/CN102689152B/en
Publication of CN102689152A publication Critical patent/CN102689152A/en
Application granted granted Critical
Publication of CN102689152B publication Critical patent/CN102689152B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention discloses a liquid die forging rolling compound forming method for a 2014 aluminium alloy large ring member with different cross sections. The liquid die forging rolling compound forming method comprises the following steps of: 1), smelting; 2), liquid die forging: fixing a forged die on an indirect extrusion casting machine; pouring alloy solution in the forged die for mold-filling for 1-6s at the pouring temperature between 680 and 700 DEG C and specific pressure between 150 and 200 MPa in the pressurizing speed of 35-40mm/s; and keeping the pressure for 35-60s under the pressure to obtain a ring blank with a nearly end cross section; 3) homogenization: cooling the ring blank with the nearly end cross section to 485 DEG C for keep the temperature for 12h; raising the temperature to 495 DEG C in the temperature-raising speed of 1 DEG C/h, and keeping the temperature for 5h; 4) afterheat isothermy rolling: reducing the temperature of the homogenized ring blank with the nearly end cross section to 430-450 DEG C, and performing isothermy rolling on a radial-shaft compound ring rolling machine; 5) thermal treatment: freely raising the temperature of the ring blank to 490 DEG C, raising the temperature to 507 DEG C in the temperature-raising speed of 5 DEG C/h, and keeping the temperature for 20min, and raising the temperature to 160 DEG C for keeping the temperature for 18h after cold water quenching; and 6) finishing.

Description

The liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings
Technical field
The short flow process that the present invention relates to a kind of major diameter metal ring with complex section shapes method, is specifically related to a kind of liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings.
Background technology
Along with the develop rapidly of China's aerospace industry, high thrust carrier rocket is badly in need of the large-size complex-cross-section aluminium alloy rings of 5 meters of higher levels of diameter.So-called complex section ring, refer to that ring axial direction sectional area size difference is large, ring cross-wise direction shape and size change greatly and all ferrule pieces of complexity comparatively of inner surface and external surface shape, it is the important step of high thrust carrier rocket project success, is the crucial connector of carrier rocket.The dimensional accuracy of special environment for use to ring and comprehensive mechanical property have proposed the requirement of intimate harshness: require part to have high-precision appearance and size on the one hand, avoid follow-up machine to add shaping, the serious ring serviceability that reduces when wasting a large amount of manpower and materials; Require on the other hand part to there is excellent structural state to reach the requirement of comprehensive mechanical property.
At present, the preparation of complex section ring adopts hot rolling (also referred to as hot rolling) to combine with machine cut processing conventionally.This technique rolls out the ring base of square-section based on shaping ingot blank, then by machine cut, needed complex section is processed into in square-section.Main process flow process is: smelting → cogging → blanking → jumping-up → punching → hot rolling → heat treatment → machining.There is the problem of the following aspects in this technique:
1) flow process is tediously long, and operation is various, and production efficiency is low;
2) rolling ring base needs punching preparation, and final cross sectional shape need be by the unnecessary dressing guarantee of cutting, and stock utilization is low;
3) mechanical processing process cuts off metal streamline, causes ring comprehensive mechanical property to decline;
4) preparation process need heat repeatedly, causes coarse grains, and surface oxidation is serious, and energy loss is large.
Publication number is a kind of method that the Chinese patent of CN 101817134A discloses ferrule piece short-flow casting and rolling composite forming, although it is short that the method for this ferrule piece short-flow casting and rolling composite forming meets production procedure to a certain extent, save the beneficial effect of the energy, material and manpower, but the method adopts centrifugal casting ring base, cannot meet the processing request of complex section ring, and the comprehensive mechanical property of producing the ferrule piece that obtains does not also reach the instructions for use as carrier rocket.
Given this, the present invention is intended to explore a kind of liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings, the liquid forging rolling combined shaping method of this different cross section of 2014 aluminium alloy large ring not only can simplify aluminium alloy rings blank-making technology flow process, reduce costs and enhance productivity, but also can effectively improve the microstructure state of aluminium alloy rings, improve comprehensive mechanical property.
Summary of the invention
The technical problem to be solved in the present invention is the liquid forging rolling combined shaping method that proposes a kind of 2014 different cross section of aluminium alloy large rings, the liquid forging rolling combined shaping method of this different cross section of 2014 aluminium alloy large ring not only can simplify aluminium alloy rings blank-making technology flow process, reduce costs and enhance productivity, but also can effectively improve the microstructure state of aluminium alloy rings, improve comprehensive mechanical property.
Realize above-mentioned technical purpose, the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings of the present invention, comprises the steps:
1) melting: 2014 aluminium alloys are pressed in melting furnace to composition proportion melting;
2) liquid forging: after liquid-state forging die is fixed on indirect extrusion casting machine, by the 1st) the aluminium alloy solution quantitative pouring that obtains in step is in liquid-state forging die, pouring temperature is 680-700 DEG C, pressing speed is 35-40 mm/s, filling time 1-6s, specific pressure is 150-200 MPa, and under this pressure pressurize 35-60 s, obtain nearly whole cross section ring base;
3) homogenising: nearly whole cross section ring base is cooled to 485 DEG C of insulation 12 h, then rises to 495 DEG C with the programming rate of 1 DEG C/h, is then incubated 5 h;
4) waste heat ausrolling: when the near whole cross section ring base temperature after homogenising is reduced to 430-450 DEG C, carry out ausrolling on the compound machine for rolling ring of journal axle;
5) heat treatment: the ring base obtaining through waste heat ausrolling is freely warming up to 490 DEG C, then rise to 507 DEG C with the programming rate of 5 DEG C/h, insulation 20 min, are warming up to 160 DEG C of insulation 18 h after cold-water quench;
6) finishing.
Further, the described the 2nd) in step, after liquid-state forging die is fixed on indirect extrusion casting machine, while being preheated to 150-200 DEG C, in liquid-state forging die die cavity, evenly spray one deck releasing agent, coating layer thickness 10-20 micron, continues preheating liquid-state forging die to 250-300 DEG C;
Further, the described the 4th), in step, waste heat ausrolling comprises the quick rolling stage, stablizes the rolling stage, the deceleration rolling stage with become the rounding shape stage, axial feed velocity V when described quick rolling stage and stable rolling stage axiallywith radial feed speed V radiallymeet V axially=0.5-0.6V radially, the described deceleration rolling stage when becoming the rounding shape stage, the not feeding of cone roller of the compound machine for rolling ring of journal axle, only rolling is due to spreading that radial rolling causes, in the time that the external diameter of ring base and finished product ring differ 30-50 mm, axial roll is lifted;
Further, rolling mold and the blank temperature difference are ± 10 DEG C;
Further, the described the 4th), in step, the radial feeds of the compound machine for rolling ring of journal axle select to forge the smaller value between the maximum amount of feeding that the saturating desired minimum amount of feeding and the pass of nipping allow;
Further, the described the 1st) in step, the raw material selection fine aluminium ingot of smelting aluminium alloy, pure spelter, MAG block, copper billet and intermediate alloy;
Further, fine aluminium ingot, pure spelter and MAG block all need to remove surperficial oxide skin and dirt before use, put into electric furnace and toast after cleaning, remove contained steam;
Further, the cavity shape of described liquid-state forging die is similar to the shape of ring, in the time of the design of liquid-state forging die, choose a side of simple shape on inside/outside cross section as positioning reference plane, and the shape that roll contacts with nearly whole cross section ring base during according to waste heat ausrolling arranges the die cavity of liquid-state forging die, and the closed size of liquid-state forging die die cavity is compared with the final sectional dimension of ring: the radial dimension of liquid-state forging die is greater than the radial dimension of ring, and the axial dimension of liquid-state forging die is less than the radial dimension of ring;
Further, rolling ratio >=1.4 of described waste heat ausrolling, inner eccentric holes degree≤3 ° of the near whole cross section ring base after controlled rolling, the core bore dia >=330mm of the near whole cross section ring base that liquid forging obtains.
Beneficial effect of the present invention is:
The liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings of the present invention adopts the technological process of melting → liquid forging → homogenising → waste heat ausrolling → heat treatment → finishing, the method is smelting aluminium alloy solution first, adopt subsequently liquid forging process to obtain nearly whole cross section ring base, and the direct rolling forming of waste heat that utilizes ring base to solidify, compared with traditional handicraft, have the following advantages:
1) short flow process, effectively enhances productivity;
2), without punching operation, the complex section of aluminium alloy rings relies on liquid-state forging die and roll pass common guarantee, significantly improves stock utilization, realizes near-net forming;
3) liquid forging-ring base structural state is significantly better than conventional cast ring base, is aided with follow-up hot rolling and is shaped and can fully ensures to encircle the forging state modification of base material, obtains the tissue of fine and closely woven and homogenising.
4) finishing procedure effectively ensures ring sectional dimension and surface accuracy, and the problem of avoiding machined to cause ring streamline to cut off, significantly improves comprehensive mechanical property;
5) blank need not heat repeatedly, and energy-saving and emission-reduction realize green manufacturing.
Therefore, the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings of the present invention is effectively simplified blank-making technology, and shortened process, reduces costs, boost productivity and economic benefit, there is huge development potentiality and wide popularizing application prospect.
Detailed description of the invention
Below in conjunction with specific embodiment, the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings of the present invention is elaborated.
the first embodiment
The liquid forging rolling combined shaping method of the 2014 different cross section of the aluminium alloy large rings of the present embodiment comprises the steps:
1) melting: 2014 aluminium alloys are pressed in melting furnace to composition proportion melting, left standstill 25 minutes after melting completes; Concrete, the raw material selection fine aluminium ingot of the present embodiment smelting aluminium alloy, pure spelter, MAG block, copper billet and intermediate alloy; Fine aluminium ingot, pure spelter and MAG block are all used sand papering before use, remove surperficial oxide skin and dirt, then in clear water, clean, and put into electric furnace and toast after cleaning, remove contained steam.
2) liquid forging: after liquid-state forging die is fixed on indirect extrusion casting machine, by the 1st) the aluminium alloy solution quantitative pouring that obtains in step is in liquid-state forging die, pouring temperature is 680 DEG C, pressing speed is 35 mm/s, filling time 6 s, specific pressure is 150 MPa, and under this pressure pressurize 60 s, obtain nearly whole cross section ring base, specific pressure refers to liquid metal cooling unit pressure of bearing under pressure, the amount that is quantitatively the required aluminium alloy solution of the different cross section of liquid forging rolling large ring as herein described.Preferably, after liquid-state forging die is fixed on indirect extrusion casting machine, while being preheated to 150 DEG C, in liquid-state forging die die cavity, evenly spray one deck releasing agent, 18 microns of coating layer thicknesses, continue preheating liquid-state forging die to 250 DEG C, and spraying releasing agent can facilitate the liquid-state forging die demoulding.
Adopt liquid forging to make nearly whole cross section ring base, make aluminium alloy crystallization, shaping produce a small amount of plastic deformation under pressure, obtain dense internal organization, crystal grain is tiny, the high-quality Melted Metal Squeezing Workpieces of any surface finish.Liquid forging has following process characteristic: 1) liquid forging can be eliminated pore, shrinkage cavity and the defect such as loose of foundry goods inside, produces local plastic deformation, makes foundry goods dense structure; 2) liquid metal, at Forming under Pressure and solidifying, makes foundry goods tight with the laminating of die cavity wall, thereby Melted Metal Squeezing Workpieces has higher surface smoothness and dimensional accuracy, and its rank can reach the level of die casting; 3) Melted Metal Squeezing Workpieces is in process of setting, and each position is in compressive stress state, is conducive to the feeding of foundry goods and prevents the generation of casting crack; 4) liquid forging process is applicable to the ring base of preparation cross section complexity very much, can effectively reduce costs, and improves the stock utilization of ring.Liquid forging technology also has the advantages such as technique is simple, foundry goods good mechanical property, production efficiency is high, cost is relatively low.
3) homogenising: nearly whole cross section ring base is cooled to 485 DEG C of insulation 12 h, then rises to 495 DEG C with the programming rate of 1 DEG C/h, is then incubated 5 h.
4) waste heat ausrolling: the waste heat after employing homogenising cools to rolling temperature and directly implements hot rolling process, and do not need post bake, in the time that nearly whole cross section ring base is cooled to 450 DEG C, adopt on the compound machine for rolling ring of journal axle and carry out ausrolling, rolling mold temperature is 450 DEG C, and the rolling mold of the present embodiment and the blank temperature difference are 0 DEG C.Described waste heat ausrolling comprises the quick rolling stage, stablizes the rolling stage, the deceleration rolling stage with become the rounding shape stage, axial feed velocity V when described quick rolling stage and stable rolling stage axiallywith radial feed speed V radiallymeet V axially=0.6V radially, the described deceleration rolling stage when becoming the rounding shape stage, the not feeding of cone roller of the compound machine for rolling ring of journal axle, only rolling is due to spreading that radial rolling causes, in the time that the external diameter of nearly whole cross section ring base and finished product ring differ 50 mm, axial roll is lifted; Preferably, the smaller value between the maximum amount of feeding that the radial feeds of the compound machine for rolling ring of the journal axle selection saturating desired minimum amount of feeding of forging and the pass of nipping allow.
5) heat treatment: the ring base obtaining through waste heat ausrolling is freely warming up to 490 DEG C, then rise to 507 DEG C with the programming rate of 5 DEG C/h, insulation 20 min, are warming up to 160 DEG C of insulation 18 h after cold-water quench.
6) finishing.
Further, the cavity shape of liquid-state forging die is similar to the shape of ring, in the time of the design of liquid-state forging die, choose a side of simple shape on inside/outside cross section as positioning reference plane, and the shape that roll contacts with nearly whole cross section ring base during according to waste heat ausrolling arranges the die cavity of liquid-state forging die, effectively avoid blank cross sectional shape complexity to cause the point/line between rolling initial stage ring base and roll to contact, cause skidding or the problem of malocclusion.The closed size of liquid-state forging die die cavity is compared with the final sectional dimension of ring: the radial dimension of liquid-state forging die is greater than the radial dimension of ring, and the axial dimension of liquid-state forging die is less than the radial dimension of ring, and concrete size is determined according to rolling ratio.
Further, rolling ratio >=1.4 of waste heat ausrolling, rolling ratio=1.4 of the present embodiment, to ensure that final ring has obvious circumferential fibers.The near whole cross section ring base inner eccentric holes degree of inner eccentric holes degree≤3 ° the present embodiment of the near whole cross section ring base after controlled rolling is 1 °, ensures terminal ring base geometric accuracy and weight precision, the core bore dia >=330mm of the near whole cross section ring base that liquid forging obtains.
The liquid forging rolling combined shaping method of the 2014 different cross section of the aluminium alloy large rings of the present embodiment adopts the technological process of melting → liquid forging → homogenising → waste heat ausrolling → heat treatment → finishing, the method is smelting aluminium alloy solution first, adopt subsequently liquid forging process to obtain nearly whole cross section ring base, and the direct rolling forming of waste heat that utilizes ring base to solidify, compared with traditional handicraft, have the following advantages:
1) short flow process, effectively enhances productivity;
2), without punching operation, the complex section of aluminium alloy rings relies on liquid-state forging die and roll pass common guarantee, significantly improves stock utilization, realizes near-net forming;
3) finishing procedure effectively ensures ring sectional dimension and surface accuracy, and the problem of avoiding machined to cause ring streamline to cut off, significantly improves comprehensive mechanical property;
4) blank need not heat repeatedly, and energy-saving and emission-reduction realize green manufacturing.
the second embodiment
The liquid forging rolling combined shaping method of the 2014 different cross section of the aluminium alloy large rings of the present embodiment comprises the steps:
1) melting: 2014 aluminium alloys are pressed in melting furnace to composition proportion melting, left standstill 30 minutes after melting completes; Concrete, the raw material selection fine aluminium ingot of the present embodiment smelting aluminium alloy, pure spelter, MAG block, copper billet and intermediate alloy; Fine aluminium ingot, pure spelter and MAG block are all used sand papering before use, remove surperficial oxide skin and dirt, then in clear water, clean, and put into electric furnace and toast after cleaning, remove contained steam.
2) liquid forging: after liquid-state forging die is fixed on indirect extrusion casting machine, by the 1st) the aluminium alloy solution quantitative pouring that obtains in step is in liquid-state forging die, pouring temperature is 700 DEG C, pressing speed is 40 mm/s, filling time 1 s, specific pressure is 200 MPa, and under this pressure pressurize 35 s, obtain nearly whole cross section ring base.Preferably, after liquid-state forging die is fixed on indirect extrusion casting machine, while being preheated to 200 DEG C, in liquid-state forging die die cavity, evenly spray one deck releasing agent, 10 microns of coating layer thicknesses, continue preheating liquid-state forging die to 300 DEG C, spraying releasing agent can facilitate the liquid-state forging die demoulding.
Adopt liquid forging to make nearly whole cross section ring base, make aluminium alloy crystallization, shaping produce a small amount of plastic deformation under pressure, obtain dense internal organization, crystal grain is tiny, the high-quality Melted Metal Squeezing Workpieces of any surface finish.Liquid forging has following process characteristic: 1) liquid forging can be eliminated pore, shrinkage cavity and the defect such as loose of foundry goods inside, produces local plastic deformation, makes foundry goods dense structure; 2) liquid metal, at Forming under Pressure and solidifying, makes foundry goods tight with the laminating of die cavity wall, thereby Melted Metal Squeezing Workpieces has higher surface smoothness and dimensional accuracy, and its rank can reach the level of die casting; 3) Melted Metal Squeezing Workpieces is in process of setting, and each position is in compressive stress state, is conducive to the feeding of foundry goods and prevents the generation of casting crack; 4) liquid forging process is applicable to the ring base of preparation cross section complexity very much, can effectively reduce costs, and improves the stock utilization of ring.Liquid forging technology also has the advantages such as technique is simple, foundry goods good mechanical property, production efficiency is high, cost is relatively low.
3) homogenising: nearly whole cross section ring base is cooled to 485 DEG C of insulation 12 h, then rises to 495 DEG C with the programming rate of 1 DEG C/h, is then incubated 5 h.
4) waste heat ausrolling: the waste heat after employing homogenising cools to rolling temperature and directly implements hot rolling process, and do not need post bake, in the time that nearly whole cross section ring base is cooled to 430 DEG C, adopt on the compound machine for rolling ring of journal axle and carry out ausrolling, rolling mold temperature is 420 DEG C, and the rolling mold of the present embodiment and the blank temperature difference are-10 DEG C.Described waste heat ausrolling comprises the quick rolling stage, stablizes the rolling stage, the deceleration rolling stage with become the rounding shape stage, axial feed velocity V when described quick rolling stage and stable rolling stage axiallywith radial feed speed V radiallymeet V axially=0.55V radially, the described deceleration rolling stage when becoming the rounding shape stage, the not feeding of cone roller of the compound machine for rolling ring of journal axle, only rolling is due to spreading that radial rolling causes, in the time that the external diameter of nearly whole cross section ring base and finished product ring differ 30 mm, axial roll is lifted; Preferably, the smaller value between the maximum amount of feeding that the radial feeds of the compound machine for rolling ring of the journal axle selection saturating desired minimum amount of feeding of forging and the pass of nipping allow.
5) heat treatment: ring base is freely warming up to 490 DEG C, then rises to 507 DEG C with the programming rate of 5 DEG C/h, insulation 20 min, are warming up to 160 DEG C of insulation 18 h after cold-water quench.
6) finishing.
Further, the cavity shape of liquid-state forging die is similar to the shape of ring, in the time of the design of liquid-state forging die, choose a side of simple shape on inside/outside cross section as positioning reference plane, and the shape that roll contacts with nearly whole cross section ring base during according to waste heat ausrolling arranges the die cavity of liquid-state forging die, effectively avoid blank cross sectional shape complexity to cause the point/line between rolling initial stage ring base and roll to contact, cause skidding or the problem of malocclusion.The closed size of liquid-state forging die die cavity is compared with the final sectional dimension of ring: the radial dimension of liquid-state forging die is greater than the radial dimension of ring, and the axial dimension of liquid-state forging die is less than the radial dimension of ring.
Further, rolling ratio >=1.4 of waste heat ausrolling, rolling ratio=3 of the present embodiment, to ensure that final ring has obvious circumferential fibers.The near whole cross section ring base inner eccentric holes degree of inner eccentric holes degree≤3 ° the present embodiment of the near whole cross section ring base after controlled rolling is 2 °, ensures terminal ring base geometric accuracy and weight precision, the core bore dia >=330mm of the near whole cross section ring base that liquid forging obtains.
The liquid forging rolling combined shaping method of the 2014 different cross section of the aluminium alloy large rings of the present embodiment adopts the technological process of melting → liquid forging → homogenising → waste heat ausrolling → heat treatment → finishing, the method is smelting aluminium alloy solution first, adopt subsequently liquid forging process to obtain nearly whole cross section ring base, and the direct rolling forming of waste heat that utilizes ring base to solidify, compared with traditional handicraft, have the following advantages:
1) short flow process, effectively enhances productivity;
2), without punching operation, the complex section of aluminium alloy rings relies on liquid-state forging die and roll pass common guarantee, significantly improves stock utilization, realizes near-net forming;
3) finishing procedure effectively ensures ring sectional dimension and surface accuracy, and the problem of avoiding machined to cause ring streamline to cut off, significantly improves comprehensive mechanical property;
4) blank need not heat repeatedly, and energy-saving and emission-reduction realize green manufacturing.
the 3rd embodiment
The liquid forging rolling combined shaping method of the 2014 different cross section of the aluminium alloy large rings of the present embodiment comprises the steps:
1) melting: 2014 aluminium alloys are pressed in melting furnace to composition proportion melting, left standstill 25 minutes after melting completes; Concrete, the raw material selection fine aluminium ingot of the present embodiment smelting aluminium alloy, pure spelter, MAG block, copper billet and intermediate alloy; Fine aluminium ingot, pure spelter and MAG block are all used sand papering before use, remove surperficial oxide skin and dirt, then in clear water, clean, and put into electric furnace and toast after cleaning, remove contained steam.
2) liquid forging: after liquid-state forging die is fixed on indirect extrusion casting machine, by the 1st) the aluminium alloy solution quantitative pouring that obtains in step is in liquid-state forging die, pouring temperature is 690 DEG C, pressing speed is 38 mm/s, filling time 3 s, specific pressure is 180MPa, and under this pressure pressurize 40 s, obtain nearly whole cross section ring base; Preferably, after liquid-state forging die is fixed on indirect extrusion casting machine, while being preheated to 180 DEG C, in liquid-state forging die die cavity, evenly spray one deck releasing agent, 20 microns of coating layer thicknesses, continue preheating liquid-state forging die to 270 DEG C, and spraying releasing agent can facilitate the liquid-state forging die demoulding.
Adopt liquid forging to make nearly whole cross section ring base, make aluminium alloy crystallization, shaping produce a small amount of plastic deformation under pressure, obtain dense internal organization, crystal grain is tiny, the high-quality Melted Metal Squeezing Workpieces of any surface finish.Liquid forging has following process characteristic: 1) liquid forging can be eliminated pore, shrinkage cavity and the defect such as loose of foundry goods inside, produces local plastic deformation, makes foundry goods dense structure; 2) liquid metal, at Forming under Pressure and solidifying, makes foundry goods tight with the laminating of die cavity wall, thereby Melted Metal Squeezing Workpieces has higher surface smoothness and dimensional accuracy, and its rank can reach the level of die casting; 3) Melted Metal Squeezing Workpieces is in process of setting, and each position is in compressive stress state, is conducive to the feeding of foundry goods and prevents the generation of casting crack; 4) liquid forging process is applicable to the ring base of preparation cross section complexity very much, can effectively reduce costs, and improves the stock utilization of ring.Liquid forging technology also has the advantages such as technique is simple, foundry goods good mechanical property, production efficiency is high, cost is relatively low.
3) homogenising: nearly whole cross section ring base is cooled to 485 DEG C of insulation 12 h, then rises to 495 DEG C with the programming rate of 1 DEG C/h, is then incubated 5 h;
4) waste heat ausrolling: the waste heat after employing homogenising cools to rolling temperature and directly implements hot rolling process, and do not need post bake, in the time that nearly whole cross section ring base is cooled to 440 DEG C, adopt on the compound machine for rolling ring of journal axle and carry out ausrolling, rolling mold temperature is 450 DEG C, and the rolling mold of the present embodiment and the blank temperature difference are 10 DEG C.Described waste heat ausrolling comprises the quick rolling stage, stablizes the rolling stage, the deceleration rolling stage with become the rounding shape stage, axial feed velocity V when described quick rolling stage and stable rolling stage axiallywith radial feed speed V radiallymeet V axially=0.6V radially, the described deceleration rolling stage when becoming the rounding shape stage, the not feeding of cone roller of the compound machine for rolling ring of journal axle, only rolling is due to spreading that radial rolling causes, in the time that the external diameter of nearly whole cross section ring base and finished product ring differ 40 mm, axial roll is lifted; Preferably, the smaller value between the maximum amount of feeding that the radial feeds of the compound machine for rolling ring of the journal axle selection saturating desired minimum amount of feeding of forging and the pass of nipping allow.
5) heat treatment: ring base is freely warming up to 490 DEG C, then rises to 507 DEG C with the programming rate of 5 DEG C/h, insulation 20 min, are warming up to 160 DEG C of insulation 18 h after cold-water quench;
6) finishing.
Further, the cavity shape of liquid-state forging die is similar to the shape of ring, in the time of the design of liquid-state forging die, choose a side of simple shape on inside/outside cross section as positioning reference plane, and the shape that roll contacts with nearly whole cross section ring base during according to waste heat ausrolling arranges the die cavity of liquid-state forging die, effectively avoid blank cross sectional shape complexity to cause the point/line between rolling initial stage ring base and roll to contact, cause skidding or the problem of malocclusion.The closed size of liquid-state forging die die cavity is compared with the final sectional dimension of ring: the radial dimension of liquid-state forging die is greater than the radial dimension of ring, and the axial dimension of liquid-state forging die is less than the radial dimension of ring.
Further, rolling ratio >=1.4 of waste heat ausrolling, rolling ratio=2 of the present embodiment, to ensure that final ring has obvious circumferential fibers.Inner eccentric holes degree≤3 ° of the near whole cross section ring base after controlled rolling, the near whole cross section ring base inner eccentric holes degree of the present embodiment is 3 °, ensures terminal ring base geometric accuracy and weight precision, the core bore dia >=330mm of the near whole cross section ring base that liquid forging obtains.
The liquid forging rolling combined shaping method of the 2014 different cross section of the aluminium alloy large rings of the present embodiment adopts the technological process of melting → liquid forging → homogenising → waste heat ausrolling → heat treatment → finishing, the method is smelting aluminium alloy solution first, adopt subsequently liquid forging process to obtain nearly whole cross section ring base, and the direct rolling forming of waste heat that utilizes ring base to solidify, compared with traditional handicraft, have the following advantages:
1) short flow process, effectively enhances productivity;
2), without punching operation, the complex section of aluminium alloy rings relies on liquid-state forging die and roll pass common guarantee, significantly improves stock utilization, realizes near-net forming;
3) finishing procedure effectively ensures ring sectional dimension and surface accuracy, and the problem of avoiding machined to cause ring streamline to cut off, significantly improves comprehensive mechanical property;
4) blank need not heat repeatedly, and energy-saving and emission-reduction realize green manufacturing.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims (6)

1. a liquid forging rolling combined shaping method for the 2014 different cross section of aluminium alloy large rings, is characterized in that: comprise the steps:
1) melting: 2014 aluminium alloys are pressed in melting furnace to composition proportion melting; The raw material selection fine aluminium ingot of smelting aluminium alloy, pure spelter, MAG block, copper billet and intermediate alloy, and fine aluminium ingot, pure spelter and MAG block all need to remove surperficial oxide skin and dirt before use, puts into electric furnace and toast after cleaning, removes contained steam;
2) liquid forging: after liquid-state forging die is fixed on indirect extrusion casting machine, while being preheated to 150-200 DEG C, in liquid-state forging die die cavity, evenly spray one deck releasing agent, coating layer thickness 10-20 micron, continue preheating liquid-state forging die to 250-300 DEG C, by the 1st) the aluminium alloy solution quantitative pouring that obtains in step is in liquid-state forging die, pouring temperature is 680-700 DEG C, pressing speed is 35-40 mm/s, filling time 1-6 s, specific pressure is 150-200 MPa, and under this pressure pressurize 35-60 s, obtain nearly whole cross section ring base;
3) homogenising: be incubated 12 h after nearly whole cross section ring base is cooled to 485 DEG C, then rise to 495 DEG C with the programming rate of 1 DEG C/h, insulation 5 h;
4) waste heat ausrolling: when the near whole cross section ring base temperature after homogenising is reduced to 430-450 DEG C, carry out ausrolling on the compound machine for rolling ring of journal axle;
5) heat treatment: the ring base obtaining through waste heat ausrolling is freely warming up to 490 DEG C, then rise to 507 DEG C with the programming rate of 5 DEG C/h, insulation 20 min, are warming up to 160 DEG C of insulation 18 h after cold-water quench;
6) finishing.
2. the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings according to claim 1, it is characterized in that: the described the 4th) in step, waste heat ausrolling comprises the quick rolling stage, stablizes the rolling stage, the deceleration rolling stage with become the rounding shape stage, axial feed velocity V when described quick rolling stage and stable rolling stage axiallywith radial feed speed V radiallymeet V axially=0.5-0.6V radially, the described deceleration rolling stage when becoming the rounding shape stage, the not feeding of cone roller of the compound machine for rolling ring of journal axle, only rolling is due to spreading that radial rolling causes, in the time that the external diameter of ring base and finished product ring differ 30-50 mm, axial roll is lifted.
3. the 2014 different cross section of aluminium alloy large ring liquid forging rolling combined shaping methods according to claim 2, is characterized in that: rolling mold and the blank temperature difference are ± 10 DEG C.
4. the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings according to claim 1, it is characterized in that: the described the 4th) in step, the smaller value between the maximum amount of feeding that the radial feeds selection saturating desired minimum amount of feeding of forging of the compound machine for rolling ring of journal axle and the pass of nipping allow.
5. according to the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings described in claim 1-4 any one, it is characterized in that: the cavity shape of described liquid-state forging die is similar to the shape of ring, in the time of the design of liquid-state forging die, choose a side of simple shape on inside/outside cross section as positioning reference plane, and the shape that roll contacts with nearly whole cross section ring base during according to waste heat ausrolling arranges the die cavity of liquid-state forging die, and the closed size of liquid-state forging die die cavity is compared with the final sectional dimension of ring: the radial dimension of liquid-state forging die is greater than the radial dimension of ring, the axial dimension of liquid-state forging die is less than the radial dimension of ring.
6. the liquid forging rolling combined shaping method of the 2014 different cross section of aluminium alloy large rings according to claim 1, it is characterized in that: rolling ratio >=1.4 of described waste heat ausrolling, inner eccentric holes degree≤3 ° of the near whole cross section ring base after rolling, the core bore dia >=330mm of the near whole cross section ring base that liquid forging obtains.
CN201210200471.8A 2012-06-18 2012-06-18 Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections Expired - Fee Related CN102689152B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210200471.8A CN102689152B (en) 2012-06-18 2012-06-18 Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210200471.8A CN102689152B (en) 2012-06-18 2012-06-18 Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections

Publications (2)

Publication Number Publication Date
CN102689152A CN102689152A (en) 2012-09-26
CN102689152B true CN102689152B (en) 2014-12-10

Family

ID=46854976

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210200471.8A Expired - Fee Related CN102689152B (en) 2012-06-18 2012-06-18 Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections

Country Status (1)

Country Link
CN (1) CN102689152B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016198816A (en) * 2015-04-14 2016-12-01 トヨタ自動車株式会社 Processing treatment method of casting
CN106111709A (en) * 2016-08-31 2016-11-16 无锡派克新材料科技股份有限公司 A kind of huge aluminum alloy ring forging looping mill rolling method for control speed

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1393297A (en) * 2001-06-28 2003-01-29 中国科学院金属研究所 Technology for manufacturing seamless Al-alloy pipe
CN101817134A (en) * 2010-03-22 2010-09-01 太原科技大学 Short-flow casting and rolling composite forming method for ferrule piece

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10328726A (en) * 1997-06-03 1998-12-15 Daido Steel Co Ltd Manufacture of die for cu hot extrusion
CN102409275B (en) * 2011-12-02 2013-06-19 南京理工大学 Preparation method of superfine crystal lead-free delay element for detonator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1393297A (en) * 2001-06-28 2003-01-29 中国科学院金属研究所 Technology for manufacturing seamless Al-alloy pipe
CN101817134A (en) * 2010-03-22 2010-09-01 太原科技大学 Short-flow casting and rolling composite forming method for ferrule piece

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
AlMgSi1铝合金盖液态模锻工艺研究;曾健华等;《锻压技术》;20020430(第2期);第39-40页 *
JP特開平10-328726A 1998.12.15 *
上海交通大学锻压教研组.液态模锻工艺实例.《液态模锻》.1981,第27、68-74页. *
曾健华等.AlMgSi1铝合金盖液态模锻工艺研究.《锻压技术》.2002,(第2期),第39-40页. *
液态模锻不锈钢制品研究;赵晓举等;《四川有色金属》;20040331(第1期);第18-21页 *
赵晓举等.液态模锻不锈钢制品研究.《四川有色金属》.2004,(第1期),第18-21页. *

Also Published As

Publication number Publication date
CN102689152A (en) 2012-09-26

Similar Documents

Publication Publication Date Title
CN102689151B (en) Liquid die forging and rolling compound formation method for GH4033 high-temperature alloy irregular-section large ring piece
CN102689161B (en) Liquid die-forging and rolling combined forming method for 7075 aluminum alloy irregular-section large-size annular piece
CN102699635B (en) Liquid die-forging and rolling composite forming method for bearing ring piece
CN102154599B (en) Short-flow high-efficiency production method for white brass alloy pipes
CN102689153B (en) Liquid die forging/rolling composite forming method for magnesium alloy irregular-section large-size ring piece
CN102689159B (en) Liquid die forging and rolling compound formation method for 6061 aluminum alloy irregular-section large ring piece
CN104625627B (en) A kind of preparation method of plasma rotating electrode titanium alloy electrode rod
CN102689155B (en) Liquid die forging and rolling compound formation method for aluminum alloy irregular-section large ring piece
CN102689152B (en) Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections
CN102689154B (en) Liquid die forging and rolling compound formation method for stainless steel irregular-section large ring piece
CN102689156B (en) GH4169 high-temperature alloy special-cross-section large annular piece liquid forging and rolling composite forming method
CN102689162B (en) Liquid die forging and rolling compound formation method for 7050 aluminum alloy irregular-section large ring piece
CN109676107A (en) A kind of three layers of the almag not compound ring short route manufacturing method of uniform thickness
CN105441844A (en) Extrusion blooming method for high-deformation superalloy ingot casting
CN102699636B (en) The liquid forging Rolling compund manufacturing process of 6082 aluminium alloy different cross section large rings
CN104015012A (en) Manufacturing method of Al-Mg-Si alloy hub
CN102689160B (en) Liquid die forging rolling compound forming method for 2A70 aluminium alloy large ring member with different cross sections
CN102689157B (en) The liquid forging Rolling compund manufacturing process of the different section ring parts of copper alloy
CN102699634B (en) Mould steel different cross section large ring liquid forging Rolling compund manufacturing process
CN1393297A (en) Technology for manufacturing seamless Al-alloy pipe
CN102689163B (en) Liquid die forging rolling compound forming method for large ring member with different cross sections
CN110541888A (en) Oil-cooled bearing seat and machining method thereof
CN106222475B (en) A kind of preparation method of Large scale alloy
CN102672439B (en) Liquid die forging rolling composite forming method for H13 hot work die steel unusual section large forging
CN109822074A (en) A kind of aluminium alloy wheel hub hot chamber extrusion casting technique

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141210

Termination date: 20170618

CF01 Termination of patent right due to non-payment of annual fee