CN107739901A - A kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam and preparation method thereof - Google Patents
A kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, the material of the Roman chair back hyperextension aluminium alloy support beam includes following components in parts by weight：The parts by weight of metallic aluminium 99 105, the parts by weight of Preparation of Metallic Strontium 56, the parts by weight of manganese metal 0.95 1.15, the parts by weight of magnesium metal 0.55 0.95, the parts by weight of Titanium 0.15 0.25, the parts by weight of lanthanoid metal 0.09 0.18, the parts by weight of crome metal 0.15 0.65, the parts by weight of metallic iron 0.3 0.6, the parts by weight of metallic copper 1.5 2.5, the parts by weight of metallic zinc 1.5 2.8, the parts by weight of neodymium metal 0.02 0.08；The beneficial effect of invention is：The inoxidizability of Roman chair back hyperextension aluminium alloy support beam is significantly improved, is increased the service life；Roman chair back hyperextension aluminium alloy support beam wearability is improved, user is accomplished standard operation when in use；Process is pollution-free, improves operating environment.
Description
Technical field
The present invention relates to machining technology field, specifically a kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam and
Its preparation method.
Background technology
Roman chair back hyperextension is a kind of body-building apparatus, is the characteristics of Roman chair back hyperextension：1st, Aeroassisted formula adjustable support pad is applied to not
With the user of stature；2nd, the cylinder row pad lifting comfort level and stability of lower section；3rd, the knot of anthroposomatology and mechanics is focused in design
Close, allow whole apparatus side group to temper the shortcut for opening up body shaping.
It is iron material matter that the support beam of Roman chair back hyperextension is most of, therefore easily oxidation, and heavier-weight, it has not been convenient to transport, it is resistance to
Mill property is poor, have impact on its service life.
The content of the invention
It is an object of the invention to provide a kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam and preparation method thereof, with
Solve the problems, such as to propose in above-mentioned background technology.
To achieve the above object, the present invention provides following technical scheme：
A kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, the material of the Roman chair back hyperextension aluminium alloy support beam include
Following components in parts by weight：
Metallic aluminium 99-105 parts by weight, Preparation of Metallic Strontium 5-6 parts by weight, manganese metal 0.95-1.15 parts by weight, magnesium metal 0.55-
0.95 parts by weight, Titanium 0.15-0.25 parts by weight, lanthanoid metal 0.09-0.18 parts by weight, crome metal 0.15-0.65 parts by weight,
Metallic iron 0.3-0.6 parts by weight, metallic copper 1.5-2.5 parts by weight, metallic zinc 1.5-2.8 parts by weight, neodymium metal 0.02-0.08 weights
Measure part.
As the further scheme of the present invention：The material of the Roman chair back hyperextension aluminium alloy support beam includes in parts by weight
Following components：
The parts by weight of metallic aluminium 102, the parts by weight of Preparation of Metallic Strontium 5.5, the parts by weight of manganese metal 1.10, the parts by weight of magnesium metal 0.75, gold
Belong to the parts by weight of titanium 0.20, the parts by weight of lanthanoid metal 0.13, the parts by weight of crome metal 0.45, the parts by weight of metallic iron 0.45, the weight of metallic copper 2.0
Measure part, the parts by weight of metallic zinc 2.2, the parts by weight of neodymium metal 0.05.
As further scheme of the invention：The Roman chair back hyperextension aluminium alloy support beam also includes metal gadolinium by weight
0.03-0.08 parts by weight.
As further scheme of the invention：The Roman chair back hyperextension aluminium alloy support beam also includes the impurity less than 0.4%.
As further scheme of the invention：The yield strength of the Roman chair back hyperextension aluminium alloy support beam be 1900MPa with
On, tensile strength is more than 256MPa, and elongation percentage is more than 1.9%.
A kind of preparation method of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, this method comprise the following steps：
S1：Metallic aluminium 99-105 parts by weight, Preparation of Metallic Strontium 5-6 parts by weight, manganese metal 0.95-1.15 weight are taken by weight
Part, magnesium metal 0.55-0.95 parts by weight, Titanium 0.15-0.25 parts by weight, mixed at high speed is added sequentially to by above-mentioned material
Mixed in machine, the rotating speed of high-speed mixer is 100-135r/min, incorporation time 45min-90min, obtains mixture
A；
S2：Lanthanoid metal 0.09-0.18 parts by weight, crome metal 0.15-0.65 parts by weight, metallic iron 0.3- are taken by weight
0.6 parts by weight, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 80-
105r/min, incorporation time 20min-60min, obtain mixture B；
S3：Metallic copper 1.5-2.5 parts by weight, metallic zinc 1.5-2.8 parts by weight, neodymium metal 0.02-0.08 are taken by weight
Parts by weight, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 120-150r/
Min, incorporation time 55min-75min, obtains mixture C；
S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, heating furnace
Temperature is 380-490 DEG C, heat time 1.8-2.8h, obtains fused mass D；
S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature
Drop to 320-340 DEG C；
S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 240-280 DEG C, to obtain crystalline solid E；
S7：By crystalline solid E die casts.
As further scheme of the invention：A kind of preparation side of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam
Method, this method comprise the following steps：
S1：Metallic aluminium 99-105 parts by weight, Preparation of Metallic Strontium 5-6 parts by weight, manganese metal 0.95-1.15 weight are taken by weight
Part, magnesium metal 0.55-0.95 parts by weight, Titanium 0.15-0.25 parts by weight, mixed at high speed is added sequentially to by above-mentioned material
Mixed in machine, the rotating speed of high-speed mixer is 120r/min, incorporation time 70min, obtains mixture A；
S2：Lanthanoid metal 0.09-0.18 parts by weight, crome metal 0.15-0.65 parts by weight, metallic iron 0.3- are taken by weight
0.6 parts by weight, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 95r/
Min, incorporation time 40min, obtain mixture B；
S3：Metallic copper 1.5-2.5 parts by weight, metallic zinc 1.5-2.8 parts by weight, neodymium metal 0.02-0.08 are taken by weight
Parts by weight, above-mentioned material being added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 135r/min,
Incorporation time is 65min, obtains mixture C；
S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, heating furnace
Temperature is 420 DEG C, heat time 2.3h, obtains fused mass D；
S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature
Drop to 330 DEG C；
S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 260 DEG C, to obtain crystalline solid E；
S7：By crystalline solid E die casts.
As further scheme of the invention：The first temperature-reduction at constant speed speed is 26-29 DEG C/min.
As further scheme of the invention：The second temperature-reduction at constant speed speed is 46-49 DEG C/min.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, significantly improve the inoxidizability of Roman chair back hyperextension aluminium alloy support beam, increase the service life；
2nd, improve Roman chair back hyperextension aluminium alloy support beam wearability, user is accomplished standard operation when in use；
3rd, process is pollution-free, improves operating environment.
Embodiment
With reference to specific embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, shown
So, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on the reality in the present invention
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is all belonged to
In the scope of protection of the invention.
Embodiment 1：
A kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, the material of the Roman chair back hyperextension aluminium alloy support beam include
Following components in parts by weight：
The parts by weight of metallic aluminium 102, the parts by weight of Preparation of Metallic Strontium 5.5, the parts by weight of manganese metal 1.10, the parts by weight of magnesium metal 0.75, gold
Belong to the parts by weight of titanium 0.20, the parts by weight of lanthanoid metal 0.13, the parts by weight of crome metal 0.45, the parts by weight of metallic iron 0.45, the weight of metallic copper 2.0
Measure part, the parts by weight of metallic zinc 2.2, the parts by weight of neodymium metal 0.05.
The Roman chair back hyperextension aluminium alloy support beam also includes metal gadolinium 0.03-0.08 parts by weight by weight.
The Roman chair back hyperextension aluminium alloy support beam also includes the impurity less than 0.4%.
The yield strength of the Roman chair back hyperextension aluminium alloy support beam is more than 1900MPa, and tensile strength is more than 256MPa, is prolonged
Rate is stretched for more than 1.9%.
A kind of preparation method of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, this method comprise the following steps：
S1：The parts by weight of metallic aluminium 102, the parts by weight of Preparation of Metallic Strontium 5.5, the parts by weight of manganese metal 1.10, the parts by weight of magnesium metal 0.75,
The parts by weight of Titanium 0.20, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer
For 120r/min, incorporation time 70min, mixture A is obtained；
S2：The parts by weight of lanthanoid metal 0.13, the parts by weight of crome metal 0.45, the parts by weight of metallic iron 0.45 are taken by weight, will be upper
The material stated is added sequentially to be mixed in high-speed mixer, and the rotating speed of high-speed mixer is 95r/min, and incorporation time is
40min, obtain mixture B；
S3：The parts by weight of metallic copper 2.0, the parts by weight of metallic zinc 2.2, the parts by weight of neodymium metal 0.05, by above-mentioned material successively
It is added in high-speed mixer and is mixed, the rotating speed of high-speed mixer is 135r/min, incorporation time 65min, is mixed
Compound C；
S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, heating furnace
Temperature is 420 DEG C, heat time 2.3h, obtains fused mass D；
S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature
Drop to 330 DEG C；
S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 260 DEG C, to obtain crystalline solid E；
S7：By crystalline solid E die casts.
The first temperature-reduction at constant speed speed is 26-29 DEG C/min.
The second temperature-reduction at constant speed speed is 46-49 DEG C/min.
Embodiment 2：
A kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, the material of the Roman chair back hyperextension aluminium alloy support beam include
Following components in parts by weight：
The parts by weight of metallic aluminium 99, the parts by weight of Preparation of Metallic Strontium 5, the parts by weight of manganese metal 0.95, the parts by weight of magnesium metal 0.55, Titanium
0.15 parts by weight, the parts by weight of lanthanoid metal 0.09, the parts by weight of crome metal 0.15, the parts by weight of metallic iron 0.3, the parts by weight of metallic copper 1.5,
The parts by weight of metallic zinc 1.5, the parts by weight of neodymium metal 0.02.
The Roman chair back hyperextension aluminium alloy support beam also includes metal gadolinium 0.03-0.08 parts by weight by weight.
The Roman chair back hyperextension aluminium alloy support beam also includes the impurity less than 0.4%.
The yield strength of the Roman chair back hyperextension aluminium alloy support beam is more than 1900MPa, and tensile strength is more than 256MPa, is prolonged
Rate is stretched for more than 1.9%.
A kind of preparation method of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, this method comprise the following steps：
S1：The parts by weight of metallic aluminium 99, the parts by weight of Preparation of Metallic Strontium 5, the parts by weight of manganese metal 0.95, magnesium metal 0.55 are taken by weight
Parts by weight, the parts by weight of Titanium 0.15, above-mentioned material is added sequentially to be mixed in high-speed mixer, high-speed mixer
Rotating speed be 100r/min, incorporation time 45min, obtain mixture A；
S2：The parts by weight of lanthanoid metal 0.09, the parts by weight of crome metal 0.15, the parts by weight of metallic iron 0.3 are taken by weight, will be above-mentioned
Material be added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 80r/min, and incorporation time is
20min, obtain mixture B；
S3：The parts by weight of metallic copper 1.5, the parts by weight of metallic zinc 1.5, the parts by weight of neodymium metal 0.02 are taken by weight, will be above-mentioned
Material be added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 120r/min, and incorporation time is
55min, obtain mixture C；
S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, heating furnace
Temperature is 380- DEG C, heat time 1.8h, obtains fused mass D；
S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature
Drop to 320 DEG C；
S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 240 DEG C, to obtain crystalline solid E；
S7：By crystalline solid E die casts.
The first temperature-reduction at constant speed speed is 26-29 DEG C/min.
The second temperature-reduction at constant speed speed is 46-49 DEG C/min.
Embodiment 3：
A kind of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, the material of the Roman chair back hyperextension aluminium alloy support beam include
Following components in parts by weight：
The parts by weight of metallic aluminium 105, the parts by weight of Preparation of Metallic Strontium 6, the parts by weight of manganese metal 1.15, the parts by weight of magnesium metal 0.95, metal
The parts by weight of titanium 0.25, the parts by weight of lanthanoid metal 0.18, the parts by weight of crome metal 0.65, the parts by weight of metallic iron 0.6, the weight of metallic copper 2.5
Part, the parts by weight of metallic zinc 2.8, the parts by weight of neodymium metal 0.08.
The Roman chair back hyperextension aluminium alloy support beam also includes metal gadolinium 0.03-0.08 parts by weight by weight.
The Roman chair back hyperextension aluminium alloy support beam also includes the impurity less than 0.4%.
The yield strength of the Roman chair back hyperextension aluminium alloy support beam is more than 1900MPa, and tensile strength is more than 256MPa, is prolonged
Rate is stretched for more than 1.9%.
A kind of preparation method of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam, this method comprise the following steps：
S1：The parts by weight of metallic aluminium 105, the parts by weight of Preparation of Metallic Strontium 6, the parts by weight of manganese metal 1.15, magnesium metal are taken by weight
0.95 parts by weight, the parts by weight of Titanium 0.25, above-mentioned material is added sequentially to be mixed in high-speed mixer, it is mixed at a high speed
The rotating speed of conjunction machine is 135r/min, incorporation time 90min, obtains mixture A；
S2：The parts by weight of lanthanoid metal 0.18, the parts by weight of crome metal 0.65, the parts by weight of metallic iron 0.6 are taken by weight, will be above-mentioned
Material be added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 105r/min, and incorporation time is
60min, obtain mixture B；
S3：The parts by weight of metallic copper 2.5, the parts by weight of metallic zinc 2.8, the parts by weight of neodymium metal 0.08 are taken by weight, will be above-mentioned
Material be added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 150r/min, and incorporation time is
75min, obtain mixture C；
S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, heating furnace
Temperature is 490 DEG C, heat time 2.8h, obtains fused mass D；
S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature
Drop to 340 DEG C；
S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 280 DEG C, to obtain crystalline solid E；
S7：By crystalline solid E die casts.
The first temperature-reduction at constant speed speed is 26-29 DEG C/min.
The second temperature-reduction at constant speed speed is 46-49 DEG C/min.
Its performance test results is as shown in the table：
| Fraze (mm) | Heat-resisting quantity | Degree of oxidation | |
| Embodiment 1 | 0.11 | It is qualified | Non-oxidation |
| Embodiment 2 | 0.13 | It is qualified | Non-oxidation |
| Embodiment 3 | 0.14 | It is qualified | Non-oxidation |
| Technical indicator | 0.35 | It is qualified | Slightly |
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (9)
- A kind of 1. anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam beam, it is characterised in that the Roman chair back hyperextension aluminium alloy support beam Material include following components in parts by weight：Metallic aluminium 99-105 parts by weight, Preparation of Metallic Strontium 5-6 parts by weight, manganese metal 0.95-1.15 parts by weight, magnesium metal 0.55-0.95 Parts by weight, Titanium 0.15-0.25 parts by weight, lanthanoid metal 0.09-0.18 parts by weight, crome metal 0.15-0.65 parts by weight, metal Iron 0.3-0.6 parts by weight, metallic copper 1.5-2.5 parts by weight, metallic zinc 1.5-2.8 parts by weight, neodymium metal 0.02-0.08 weight Part.
- 2. anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 1, it is characterised in that the Roman chair back hyperextension The material of aluminium alloy support beam includes following components in parts by weight：The parts by weight of metallic aluminium 102, the parts by weight of Preparation of Metallic Strontium 5.5, the parts by weight of manganese metal 1.10, the parts by weight of magnesium metal 0.75, Titanium 0.20 parts by weight, the parts by weight of lanthanoid metal 0.13, the parts by weight of crome metal 0.45, the parts by weight of metallic iron 0.45, the weight of metallic copper 2.0 Part, the parts by weight of metallic zinc 2.2, the parts by weight of neodymium metal 0.05.
- 3. anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 1 or 2, it is characterised in that sieve Split heads aluminium alloy support beam also includes metal gadolinium 0.03-0.08 parts by weight by weight.
- 4. anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 1 or 2, it is characterised in that sieve Split heads aluminium alloy support beam also includes the impurity less than 0.4%.
- 5. anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 1 or 2, it is characterised in that sieve The yield strength of split heads aluminium alloy support beam is more than 1900MPa, and tensile strength is more than 256MPa, elongation percentage be 1.9% with On.
- 6. the preparation method of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 1, it is characterised in that This method comprises the following steps：S1：Metallic aluminium 99-105 parts by weight, Preparation of Metallic Strontium 5-6 parts by weight, manganese metal 0.95-1.15 parts by weight, gold are taken by weight Belong to magnesium 0.55-0.95 parts by weight, Titanium 0.15-0.25 parts by weight, above-mentioned material is added sequentially in high-speed mixer Mixed, the rotating speed of high-speed mixer is 100-135r/min, incorporation time 45min-90min, obtains mixture A；S2：Lanthanoid metal 0.09-0.18 parts by weight, crome metal 0.15-0.65 parts by weight, metallic iron 0.3-0.6 weights are taken by weight Part is measured, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 80-105r/ Min, incorporation time 20min-60min, obtain mixture B；S3：Metallic copper 1.5-2.5 parts by weight, metallic zinc 1.5-2.8 parts by weight, neodymium metal 0.02-0.08 weight are taken by weight Part, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 120-150r/min, Incorporation time is 55min-75min, obtains mixture C；S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, the temperature of heating furnace For 380-490 DEG C, heat time 1.8-2.8h, fused mass D is obtained；S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature declines To 320-340 DEG C；S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 240-280 DEG C, to obtain crystalline solid E；S7：By crystalline solid E die casts.
- 7. the preparation method of anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 6, it is characterised in that This method comprises the following steps：S1：Metallic aluminium 99-105 parts by weight, Preparation of Metallic Strontium 5-6 parts by weight, manganese metal 0.95-1.15 parts by weight, gold are taken by weight Belong to magnesium 0.55-0.95 parts by weight, Titanium 0.15-0.25 parts by weight, above-mentioned material is added sequentially in high-speed mixer Mixed, the rotating speed of high-speed mixer is 120r/min, incorporation time 70min, obtains mixture A；S2：Lanthanoid metal 0.09-0.18 parts by weight, crome metal 0.15-0.65 parts by weight, metallic iron 0.3-0.6 weights are taken by weight Part is measured, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 95r/min, is mixed The conjunction time is 40min, obtains mixture B；S3：Metallic copper 1.5-2.5 parts by weight, metallic zinc 1.5-2.8 parts by weight, neodymium metal 0.02-0.08 weight are taken by weight Part, above-mentioned material is added sequentially to be mixed in high-speed mixer, the rotating speed of high-speed mixer is 135r/min, mixing Time is 65min, obtains mixture C；S4：Mixture A, mixture B and mixture C are added in the heating furnace with agitating paddle simultaneously, the temperature of heating furnace For 420 DEG C, heat time 2.3h, fused mass D is obtained；S5：Using the technique of discontinuous casting, fused mass D is injected into crystallisation vessel, with the first temperature-reduction at constant speed, temperature declines To 330 DEG C；S6：Continue, toward injection fused mass D in crystallisation vessel, with the second temperature-reduction at constant speed to 260 DEG C, to obtain crystalline solid E；S7：By crystalline solid E die casts.
- 8. the preparation method of the anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 6 or 7, its feature exist In the first temperature-reduction at constant speed speed is 26-29 DEG C/min.
- 9. the preparation method of the anti-oxidation wear-resisting Roman chair back hyperextension aluminium alloy support beam according to claim 6 or 7, its feature exist In the second temperature-reduction at constant speed speed is 46-49 DEG C/min.
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