CN100563916C - The super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method - Google Patents
The super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method Download PDFInfo
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- CN100563916C CN100563916C CNB2005101073602A CN200510107360A CN100563916C CN 100563916 C CN100563916 C CN 100563916C CN B2005101073602 A CNB2005101073602 A CN B2005101073602A CN 200510107360 A CN200510107360 A CN 200510107360A CN 100563916 C CN100563916 C CN 100563916C
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Abstract
The present invention relates to a kind of super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method.Its main feature is: to selecting the cold drawn section bar or the bar of superduralumin material for use, carry out the semi-molten heating, be heated to inner solid phase of blank and liquid phase when being in 470～580 ℃ of temperature stablizing coexisting state, be incubated 30～60 minutes, in being placed in the good mould of preheating, the processing of exerting pressure makes that blank produces distortion, the filling of flowing, process such as is pressed into, and obtains to stipulate the manufacturing process of shape and size product again through the high temperature solid solution Ageing Treatment.This method can make the profile of formation of parts need not reprocessing, can simplify manufacturing procedure thus, reduces machining period, and the utilization rate of material is improved greatly, and cost reduces, and also can shorten the production cycle simultaneously, enhances productivity.
Description
Technical field
The present invention relates to the semi-solid-state shaping method of superduralumin part, be specially adapted to the method for super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping.
Background technology
In technique known, manufacturing for the superduralumin part is shaped, and traditional method is to adopt bar, is shaped by machining, the problem that this kind method exists is: because the part shape complexity, from under expect and shape, need multiple tracks even tens procedures, especially for complex-shaped different in nature part only sharp processing just need ten multiple working procedures, also need various processing equipment such as line cutting and electric pulse in the operation, therefore, manufacturing procedure is many, and production efficiency is low.In addition, adopting machining to be shaped makes the consumption of material big, utilization rate is low, as the 7A04 bar of certain product matrix adopting φ 110mm～φ 120mm, every about 3000g of blank consumptive material, the part net weight is 108g, stock utilization has only 3.6%, because the utilization rate of material is low, has not only increased manufacturing cost greatly, but also the waste resource.For this reason, improve existing processing method, seek a kind ofly can solve the superduralumin part forming, new method particularly light, thin, short, little, high texture part forming is necessary.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can reduce manufacturing procedure, increase work efficiency, improve stock utilization, reduce the method for the super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping of manufacturing cost.
Realize that the technical scheme that purpose of the present invention is taked is: cold drawn section bar or the pretreated superduralumin bar of process of selecting the superduralumin material, carry out the semi-molten heating, blank heating to inner solid phase and liquid phase is in 470～580 ℃ of temperature ranges stablizing coexisting state, be incubated 30～60 minutes, be seated in then (mold temperature is controlled at 250～280 ℃) in the good mould of preheating, by forcing press with the blank extrusion molding, product with extrusion molding carries out the high temperature solid solution processing again, the solid solution heating-up temperature is 480～525 ℃, temperature retention time is 25～30 minutes, through Ageing Treatment, promptly get the semi-solid-state shaping product again.
The preliminary treatment of described superduralumin bar is that pieces of bar stock is heated in 376 ℃～433 ℃ temperature ranges more than solidus with below the burning temperature, and it is standby to be cooled to room temperature after being incubated 20 hours.
Described Ageing Treatment can adopt the two-stage Ageing Treatment: the one-level aging temperature is 140 ℃, is incubated 6 hours, 150 ℃ of insulations of secondary time effect treatment temperature 1 hour;
Super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method of the present invention, be to make full use of the processing that metal carries out from the solid-state semisolid characteristic that is had when liquid transition (solid, liquid coexistence), can make the matrix product profile of shaping need not reprocessing, can simplify manufacturing procedure thus, reduce machining period, and the utilization rate of material improves the cost reduction greatly, simultaneously also shorten the production cycle, improved production efficiency.Method of the present invention is through practical application, and part manufacturing cost reduces by 35～60%, and productivity ratio improves 3～10 times, and every performance indications of part reach and surpass T
6The status techniques requirement is for condition has been created in the batch process that solves light, thin, short, little, high texture superduralumin blank forming part.
Remarkable advantage of the present invention is:
(1) power consumption of polymer processing is shaped than machining and reduces greatly;
(2) the product structure property is good, and the dimensional accuracy height is than the shaping that is easier to realize difficult processing parts.
(3) cost is low, productivity ratio is high, can realize producing in enormous quantities.
(4) production of the Productivity product workpiece part of suitable light, thin, short, little, shock-resistant, high texture.
(5) physical property of part improves greatly:
The specific embodiment
Material therefor of the present invention is an ordinary production, cold drawn section bar or bar that the superduralumin of the liquid-solid coexistence of broad is arranged, its method is to semisolid with blank heating, promptly be in when stablizing coexisting state in the inner solid phase of blank and liquid phase, blank is seated in the mould, the processing of directly exerting pressure makes that blank produces distortion, the filling of flowing, process such as is pressed into, and obtains to stipulate the product of shape and size again through the high temperature solid solution Ageing Treatment.The concrete steps of this method are:
Embodiment one
Selection: select superduralumin 7A04 bar for use;
The preliminary treatment of material: the pieces of bar stock of selecting for use is carried out the preliminary treatment of material earlier, and the heating-up temperature during preliminary treatment is 415 ℃, temperature retention time 20 hours, and cooling is standby naturally;
Semi-solid-state shaping:
With pretreated pieces of bar stock, in heating furnace, be heated to inner solid phase of blank and liquid phase when being in 480 ℃ of temperature stablizing coexisting state, be incubated 50 minutes, be seated in the mould that is preheated to 280 ℃, by forcing press with the bar extrusion molding;
The high temperature solid solution Ageing Treatment: the product to semi-solid-state shaping carries out the high temperature solid solution processing, the solid solution heating-up temperature is 510 ℃, be incubated and quench after 30 minutes, the transfer time of quenching, hardening media was a water less than 15 seconds, water temperature remains in 10～50 ℃ of scopes, and make workpiece in water ceaselessly up and down or move left and right, quench after the two-stage Ageing Treatment, the one-level aging temperature is 140 ℃, be incubated 6 hours, 150 ℃ of insulations of secondary time effect treatment temperature 1 hour; Be chilled to room temperature, promptly get the semi-solid-state shaping product.
Embodiment two
Select superduralumin 7A04 bar for use;
Heating-up temperature during the pieces of bar stock preliminary treatment of selecting for use is 380 ℃, temperature retention time 20 hours;
The semi-molten heating-up temperature of pieces of bar stock is 510 ℃, is incubated 40 minutes, is seated in extrusion molding in the mould that is preheated to 270 ℃;
The high temperature solid solution treatment temperature of semi-solid-state shaping product is 500 ℃, is incubated 30 minutes.
Embodiment three
Selection: select cold drawn section bar for use.
The semi-molten heating-up temperature of cold drawn section bar is 560 ℃, is incubated 60 minutes, is seated in extrusion molding in the mould that is preheated to 260 ℃;
The high temperature solid solution treatment temperature of semi-solid-state shaping product is 480 ℃, is incubated 25 minutes.
Following table be superduralumin 7A04 material after high temperature solid solution, Ageing Treatment, the comparison of situations such as mechanical index of realizing with conventional solid solution, Ageing Treatment and power consumption:
In the table: R
m/ N.mm
-2: tensile strength sigma
b
R
p0。2/ N.mm
-2: regulation disproportional elongation stress σ
P0.2
A/%: percentage elongation δ 〉=6%; 〉=430Mpa
By contrast table as can be seen, the superduralumin material is handled through high temperature solid solution, and its mechanical property is than conventional treatment height, and has shortened the processing time greatly, in its energy savings with on boosting productivity significant raising is arranged; Simultaneously the physical property of material is improved significantly.Super-hard aluminum special-shaped parts by this method is made can compare favourably with the part that external major company of the same trade produces.
Claims (2)
1, a kind of super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method, it is characterized in that: to the cold drawn section bar of the superduralumin material selected for use or through temperature is 376～433 ℃ of insulation 20 hours and pretreated superduralumin pieces of bar stock down, carry out the semi-molten heating, heating-up temperature is 470～580 ℃, be incubated 30～60 minutes, blank is seated in to be preheating to temperature be extrusion molding in 250～280 ℃ the mould, carrying out high temperature solid solution then handles, the solid solution heating-up temperature is 480～525 ℃, temperature retention time is 25～30 minutes, again through Ageing Treatment.
2, super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method according to claim 1, it is characterized in that: described aging temperature is: 140 ℃ of one-level aging temperatures, be incubated 6 hours, 150 ℃ of secondary time effect treatment temperatures are incubated 1 hour.
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| CNB2005101073602A CN100563916C (en) | 2005-12-30 | 2005-12-30 | The super-hard aluminum special-shaped parts semi-melting-heating semi-solid-state shaping method |
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| CN100563916C true CN100563916C (en) | 2009-12-02 |
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| CN112024629B (en) * | 2019-12-18 | 2022-11-11 | 哈尔滨理工大学 | Method for preparing semi-solid blank by pulse current |
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Non-Patent Citations (4)
| Title |
|---|
| 半熔融加工制造粒子强化复层复合材料. 李维娟等.机械工程材料，第22卷第3期. 1998 |
| 半熔融加工制造粒子强化复层复合材料. 李维娟等.机械工程材料，第22卷第3期. 1998 * |
| 超硬铝合金呆板手热处理工艺研究. 钱应平.机械工人（热加工），第2003.8期. 2003 |
| 超硬铝合金呆板手热处理工艺研究. 钱应平.机械工人（热加工），第2003.8期. 2003 * |
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