CN115323208B - Low-hydrogen and low-slag-inclusion cast structural member and casting production method thereof - Google Patents
Low-hydrogen and low-slag-inclusion cast structural member and casting production method thereof Download PDFInfo
- Publication number
- CN115323208B CN115323208B CN202210979617.7A CN202210979617A CN115323208B CN 115323208 B CN115323208 B CN 115323208B CN 202210979617 A CN202210979617 A CN 202210979617A CN 115323208 B CN115323208 B CN 115323208B
- Authority
- CN
- China
- Prior art keywords
- less
- percent
- ingot
- aluminum
- structural member
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a casting structural member with low hydrogen and low slag inclusion content and a casting production method thereof, belonging to the technical field of casting. The casting structural member is a D357 or ZL114A casting structural member, when the casting structural member is prepared, a D357 or ZL114A prefabricated aluminum ingot is firstly prepared, and then the prefabricated aluminum ingot is remelted, refined and cast to obtain the casting structural member. Its hydrogen content is less than 0.06cm 3 H 2 100g, density equivalent < 1.0%; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 /section.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a cast structural member with low hydrogen and low slag inclusion content and a casting production method thereof.
Background
D357 and ZL114A are widely used in the manufacture of parts in the fields of military equipment, aerospace, etc. in the international manufacturing industry, as materials having the highest tensile strength and superior elongation among the current aluminum-silicon materials. At present, the domestic ZL114A casting ingot has only the requirement indexes for components and pinholes in the supply market, and in order to obtain materials and aluminum castings meeting the aerospace standard, the military industry and the aerospace field can only adopt 99.99 percent of high-purity aluminum ingots to manufacture ZL114A prefabricated ingots, or a foundry can self adopt 99.99 percent of high-purity aluminum ingots to prepare ZL114A aluminum alloy materials for casting production. The manufacturing cost of ZL114A is approximately 15000 yuan based on 00 aluminum ingots. The D357 alloy is a material with higher performance than national standard ZL114A, and the material is not applied in China at present. Comparison of mechanical properties of D357 material with ZL114A is shown in Table 1 and FIG. 1 below.
Table 1D 357 T6 mechanical Properties of materials compared with data of HB962 ZL114A T6
| D357 | ZL114A | D357 is higher than ZL114A data by a percentage | |
| Rm，MPa | ≧352 | ≧300 | 17.33％ |
| Rp0.2，MPa | 290-324 | ≧220 | 31.82-47.27％ |
| A，％ | - | ≧4 | - |
Disclosure of Invention
In order to solve the problem of high cost of ZL114A materials in the fields of military equipment, aerospace and the like, a D357 material with better domestic performance is introduced; the invention aims to provide a cast structural member with low hydrogen and low slag inclusion content and a casting production method thereof, and aims to solve the problems that military equipment and aerospace parts have requirements on structural strength and internal quality of products, and the cast structural member with low H content and low slag inclusion content is obtained through component and process control, so that the cost can be reduced and the application of the structural member with higher strength can be achieved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a method of casting a low hydrogen, low slag inclusion cast structure, the method comprising the steps of (1) - (4):
(1) Raw material preparation:
prefabricated aluminum ingots, alBe ingots, al5TiB rods, al10Sr rods and Mg ingots;
(2) Remelting a prefabricated aluminum ingot:
the melting furnace is opened, the crucible is preheated, a prefabricated aluminum ingot is added at the same time, the temperature is raised and melted, and after the prefabricated aluminum ingot is melted, the temperature is controlled at 690-700 ℃;
(3) Refining, modification and refining: when the temperature of the aluminum liquid is 690-700 ℃, adding AlBe ingot, al-5Ti-B rod, al10Sr rod and Mg ingot, stirring to make the components uniform; simultaneously, after 15 minutes of argon rotary blowing refining degassing, sealing and standing for 10 minutes;
(4) And (3) testing the hydrogen content and the density of the aluminum liquid after refining, and casting after meeting the requirements to obtain the D357 or ZL114A cast structural member.
In the step (1), the prefabricated aluminum ingot is a D357 or ZL114A prefabricated aluminum ingot, and the chemical components of the D357 prefabricated aluminum ingot are as follows in percentage by weight: 6.70-7.30% of Si, 0.56-0.60% of Mg, 0.07-0.10% of Ti, 0.05-0.07% of Be, less than 0.12% of Fe, less than 0.01% of Cu, less than 0.01% of Zn, 1/2-2/3% of Mn/Fe=0.01%, less than 0.0012% of P, less than 0.01% of Zr, less than 0.001% of Bi, less than 0.0015% of Na, less than 0.003% of Pb, less than 0.012% of Cr and the balance of Al;
the chemical components of the ZL114A prefabricated aluminum ingot are as follows in percentage by weight: 6.70-7.30% of Si, 0.50-0.65% of Mg, 0.07-0.10% of Ti, 0.05-0.07% of Be, less than 0.12% of Fe, less than 0.08% of Cu, less than 0.08% of Zn, 1/2-2/3% of Mn/Fe=0.01%, less than 0.0012% of P, less than 0.15% of Zr, less than 0.001% of Bi, less than 0.0015% of Na, less than 0.003% of Pb, less than 0.012% of Cr and the balance of Al.
In the step (1), the hydrogen content of the prefabricated aluminum ingot is less than 0.10cm 3 H 2 100g, density equivalent < 1.0%; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 /section.
In the step (1), the preparation process of the prefabricated aluminum ingot comprises the following steps (a) - (d):
(a) After the reflection melting furnace is ignited, pouring electrolytic pure aluminum liquid or adding pure aluminum ingot and melting into aluminum liquid; the purity of the electrolytic pure aluminum liquid and the pure aluminum ingot is more than or equal to 99.75 percent;
(b) Heating the aluminum liquid to 720-730 ℃, and adding metal silicon according to the component ratio; after the metal silicon is melted, adding Al5Ti ingots according to the composition ratio at 720-730 ℃; analyzing the components of the molten metal, and calculating AlMn ingots with Mn content of 1/2-2/3 of Fe content according to the analysis value of Fe, wherein the adding temperature is 720-730 ℃; then adjusting the temperature of the aluminum liquid to 690-700 ℃, and adding Mg ingots; when the temperature is regulated to 690-700 ℃, adding a refining agent, and introducing nitrogen into the aluminum liquid for degassing for 30-40 minutes;
(c) After detecting that the density and the hydrogen content of the aluminum liquid meet the requirements, analyzing the components of the aluminum liquid, and supplementing magnesium to the required middle limit after analyzing the components;
(d) Pouring a slag removing agent on the surface of the aluminum liquid, and removing scum on the surface of the aluminum liquid; and (5) pouring an aluminum ingot at 690-700 ℃ to obtain the prefabricated aluminum ingot.
In the step (3), the adding amount of the AlBe ingot is 0.04-0.07% of the weight of the aluminum liquid, the adding amount of the Al-5Ti-B rod is 0.05-0.08% of the weight of the aluminum liquid, the adding amount of the Al10Sr rod is 0.006-0.009% of the weight of the aluminum liquid, and the adding amount of the Mg ingot is 0.1% of the weight of the aluminum liquid.
In the step (4), the casting temperature is 720-730 ℃.
The cast structural member with low hydrogen and low slag inclusion content is produced by the method, and is made of a D357 or ZL114A material, wherein the D357 material comprises the following chemical components in percentage by weight: 6.50 to 7.50 percent of Si, 0.55 to 0.60 percent of Mg, 0.05 to 0.10 percent of Ti, 0.04 to 0.07 percent of Be, less than 0.12 percent of Fe, less than 0.01 percent of Cu, less than 0.01 percent of Zn, 1/2-2/3 percent of Mn/Fe=0.01 percent of Sn, less than 0.0015 percent of P, less than 0.01 percent of Zr, less than 0.0015 percent of Bi, less than 0.002 percent of Na, less than 0.03 percent of Pb, less than 0.015 percent of Cr and the balance of Al;
the ZL114A material comprises the following chemical components in percentage by weight: 6.50 to 7.50 percent of Si, 0.45 to 0.75 percent of Mg, 0.05 to 0.10 percent of Ti, 0.04 to 0.07 percent of Be, less than 0.12 percent of Fe, less than 0.10 percent of Cu, less than 0.10 percent of Zn, 1/2-2/3 percent of Mn/Fe=0.01 percent of Sn, less than 0.0015 percent of P, less than 0.2 percent of Zr, less than 0.0015 percent of Bi, less than 0.002 percent of Na, less than 0.03 percent of Pb, less than 0.015 percent of Cr and the balance of Al.
The hydrogen content in the cast structural member is less than 0.06cm 3 H 2 100g, density equivalent < 1.0%.
The cast structural member has uniform ingot fracture structure and fine grains; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 /section.
The invention has the following beneficial effects:
1. aiming at the characteristic that parts in the field of military equipment and aerospace have high requirements on aluminum alloy ingot materials, the invention enables the produced D357 or ZL114A parts (such as a casing, a cabin door and the like) to completely meet the design quality requirements through a specific D357 or ZL114A prefabricated aluminum ingot preparation process and a cast part preparation process.
2. The method comprises the steps of firstly preparing D357 or ZL114A prefabricated aluminum ingot, and controlling the hydrogen content of the obtained prefabricated ingot to be less than 0.10cm through the composition and process 3 H 2 100g, density equivalent < 1.0%; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 /section. Further casting the prefabricated ingot as casting product with the hydrogen content smaller than 0.06cm 3 H 2 100g, density equivalent less than 1.0%, average total area of slag inclusion with length more than 0.1mm less than 1.0mm 2 /section. Can meet the use requirements of parts of military equipment and aerospace.
3. The production cost of ZL114A material can be reduced by 2/3.
4. The D357 material and the casting with higher mechanical property indexes can be obtained, and better choices can be provided for the design and manufacture of parts in the fields of domestic military industry and aerospace.
Drawings
Fig. 1 is a graph comparing the mechanical properties of D357T 6 material with those of HB962 ZL114A T.
Fig. 2 shows the structure of a casing part prepared in example 1.
FIG. 3 is a photograph of a fracture of a prefabricated aluminum ingot prepared in example 1 and a photograph of a fracture of a failed prefabricated aluminum ingot; wherein: (a) example 1; (b) failed interruptions.
Fig. 4 is a part structure of the ZL114A aircraft spoiler actuator prepared in example 2.
Figure 5 shows the structure of a door part of an aircraft, D357, prepared in example 3.
Detailed Description
For a further understanding of the present invention, the present invention is described below with reference to the examples, which are only illustrative of the features and advantages of the present invention and are not intended to limit the scope of the claims of the present invention.
The invention provides a preparation process of a D357 or ZL114A cast part, which comprises the steps of firstly preparing a D357 or ZL114A prefabricated aluminum ingot, and then adopting the prefabricated aluminum ingot to prepare a corresponding D357 or ZL114A cast part. The specific preparation process of each of the following examples is as follows:
1. preparation of D357 or ZL114A prefabricated aluminum ingot comprises the following steps:
(1) Preparing raw materials according to the chemical components of the prefabricated aluminum ingot: electrolytic aluminum solution or pure aluminum ingot (purity is more than or equal to 99.75%), metallic silicon, alBe alloy ingot, al5Ti alloy ingot, aluminum-manganese alloy, and the like. The chemical composition of the D357 prefabricated aluminum ingot is as follows (wt.%): 6.70-7.30% of Si, 0.56-0.60% of Mg, 0.07-0.10% of Ti, 0.05-0.07% of Be, less than 0.12% of Fe, less than 0.01% of Cu, less than 0.01% of Zn, 1/2-2/3% of Mn/Fe=0.01%, less than 0.0012% of P, less than 0.01% of Zr, less than 0.001% of Bi, less than 0.0015% of Na, less than 0.003% of Pb, less than 0.012% of Cr and the balance of Al; the sum of the contents of other impurities (Hg, cd, ni, B, li, be, V, ga, etc.) is less than 0.09%.
The chemical composition of the ZL114A prefabricated aluminum ingot is as follows (wt.%): 6.70-7.30% of Si, 0.50-0.65% of Mg, 0.07-0.10% of Ti, 0.05-0.07% of Be, less than 0.12% of Fe, less than 0.08% of Cu, less than 0.08% of Zn, 1/2-2/3% of Mn/Fe=0.01%, less than 0.0012% of P, less than 0.15% of Zr, less than 0.001% of Bi, less than 0.0015% of Na, less than 0.003% of Pb, less than 0.012% of Cr and the balance of Al.
(2) After the reflection melting furnace is ignited, pouring electrolytic pure aluminum liquid or adding pure aluminum ingot (00 pure aluminum ingot) and melting into aluminum liquid;
(3) Heating the aluminum liquid to 725 ℃, and adding metal silicon; after the metal silicon is melted, adding an AlBe alloy ingot and an Al5Ti alloy ingot at 725 ℃; analyzing the components of the alloy liquid, and calculating AlMn alloy with Mn content of 1/2-2/3 of Fe content according to the analysis value of Fe, wherein the adding temperature is 725 ℃;
(4) After the temperature of the aluminum liquid is regulated to 695 ℃, adding Mg ingots; then adding a proper amount of conventional aluminum alloy refining agent at 695 ℃, and introducing nitrogen with the purity of 99.99% into the aluminum liquid for degassing for 30-40 minutes;
(5) Testing density on a density equivalent meter; testing the hydrogen content of the aluminum liquid by using a hydrogen tester; taking a component sample, analyzing the components, and then supplementing magnesium to the required middle limit; then adding a slag removing agent on the surface of the aluminum liquid, and removing scum on the surface of the aluminum liquid;
(6) Opening a liquid outlet of the furnace body, starting to pour aluminum ingots, and controlling the pouring temperature to 695 ℃; filtering the alloy liquid before casting, and then forming into a prefabricated aluminum ingot.
During the preparation process, the composition, density equivalent and fracture oxide area of the material are monitored in the early, middle and late stages.
The prepared prefabricated aluminum ingot requires: hydrogen content < 0.10cm 3 H 2 100g, density equivalent < 1.0%; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 /section.
2. Preparation of D357 or ZL114A cast parts:
(1) Raw material preparation:
d357 or ZL114A prefabricated aluminium ingot; an AlBe alloy ingot, an Al5TiB alloy rod, an Al10Sr alloy rod, an Mg ingot and a deslagging agent; before use, the prefabricated ingot, the AlBe alloy ingot, the Al5TiB alloy rod and the Al10Sr alloy rod are placed at the furnace edge for preheating, and the Mg ingot and the slag remover are taken and put lightly, so that the furnace burden is forbidden to be thrown.
(2) Remelting a prefabricated aluminum ingot:
opening a melting furnace, preheating a crucible, and simultaneously adding a prefabricated aluminum ingot, wherein the aluminum ingot slides into the bottom of the crucible along the wall of the crucible; heating and melting, and skimming scum on the surface of the molten liquid continuously in the melting process; after the aluminum ingot is melted, controlling the temperature to 725 ℃;
(3) Alloying, refining and modifying: when the temperature of the aluminum liquid is 725 ℃, adding an AlBe alloy ingot, an Al-5Ti-B alloy rod and an Al10Sr alloy rod, and stirring to ensure that the components are uniform; wherein: the addition amount of the AlBe alloy ingot is 0.04-0.07% of the weight of the aluminum liquid, the addition amount of the Al-5Ti-B alloy rod is 0.05-0.08% of the weight of the aluminum liquid, and the addition amount of the Al10Sr alloy rod accounts for 0.006-0.009% of the weight of the aluminum liquid;
(4) Degassing and refining: after the temperature of the aluminum liquid is regulated to 695 ℃, adding Mg ingots accounting for 0.1 percent of the weight of the aluminum liquid, simultaneously, carrying out rotary blowing refining and degassing for 15 minutes by argon, covering a cover and standing for 10 minutes, wherein the inner surface of the cover is coated with zinc oxide paint, and if the cover stands for a long time, a small amount of argon can be introduced into the cover;
(5) And (3) testing the hydrogen content and density of the aluminum liquid after refining, and pouring at 725 ℃ after meeting the requirements to obtain the D357 or ZL114A cast structural member.
(6) Heat treatment, the heat treatment system is: solution treatment: quenching in water at 543+/-3 ℃ for 10 hours and 60-90 ℃; aging treatment: 175+ -5deg.C, 2-10 hours.
The chemical composition of the prepared D357 cast part was (wt.%): 6.50 to 7.50 percent of Si, 0.55 to 0.60 percent of Mg, 0.05 to 0.10 percent of Ti, 0.04 to 0.07 percent of Be, less than 0.12 percent of Fe, less than 0.01 percent of Cu, less than 0.01 percent of Zn, 1/2-2/3 percent of Mn/Fe=0.01 percent of Sn, less than 0.0015 percent of P, less than 0.01 percent of Zr, less than 0.0015 percent of Bi, less than 0.002 percent of Na, less than 0.03 percent of Pb, less than 0.015 percent of Cr and the balance of Al; the sum of the contents of other impurities (Hg, cd, ni, B, li, be, V, ga, etc.) is less than 0.1%.
The chemical composition of the prepared ZL114A cast part is (wt.%): 6.50 to 7.50 percent of Si, 0.45 to 0.75 percent of Mg, 0.05 to 0.10 percent of Ti, 0.04 to 0.07 percent of Be, less than 0.12 percent of Fe, less than 0.10 percent of Cu, less than 0.10 percent of Zn, 1/2-2/3 percent of Mn/Fe=0.01 percent of Sn, less than 0.0015 percent of P, less than 0.2 percent of Zr, less than 0.0015 percent of Bi, less than 0.002 percent of Na, less than 0.03 percent of Pb, less than 0.015 percent of Cr and the balance of Al; the sum of the contents of other impurities (Hg, cd, ni, B, li, be, V, ga, etc.) is less than 0.1%.
The prepared cast part requires: hydrogen content < 0.06cm 3 H 2 100g, density equivalent less than 1.0%, average total area of slag inclusion with length more than 0.1mm less than 1.0mm 2 /section.
Example 1:
in the embodiment, a ZL114A prefabricated aluminum ingot is firstly prepared, and then a certain casing part is prepared by the prefabricated aluminum ingot, wherein the part structure is shown in figure 2.
Taking 5 finished ingots before, during and after casting of the prefabricated aluminum ingot, and respectively taking a fracture at 1/3 and 2/3 of each ingot for inspection, wherein the inspection results are as follows:
(1) The fracture structure is uniform and the grains are fine;
(2) Loose tissue in the contraction zone is free of white (aluminum hydroxide) tissue;
(3) Slag inclusion average total area with length of more than 0.1 mm: 1.0mm 2 A section;
(4) The photograph of the fracture is shown in fig. 3.
Taking 1 finished ingot before casting, after casting, and detecting metallographic structure results: alpha aluminum is tiny and uniform.
The design chemical composition/actual measurement values of the case parts produced by the prefabricated aluminum ingot are shown in table 2, and the hydrogen content/density equivalent/fracture inspection is shown in table 3; the mechanical properties of the castings are tested after heat treatment, and the heat treatment system is as follows: solution treatment: quenching in water at 543+/-3 ℃ for 10 hours and 75 ℃; aging treatment: 175.+ -. 5 ℃ for 5 hours. The mechanical properties of the product are shown in Table 4.
Table 2 zl114a cast part chemistry (wt.%)
Table 3 zl114a cast part hydrogen content/density equivalent/slag inclusion
TABLE 4 mechanical Properties of ZL114A cast parts
Example 2:
in this embodiment, a ZL114A prefabricated aluminum ingot is first prepared, and then a certain aircraft spoiler actuator part is prepared by adopting the ZL114A prefabricated aluminum ingot (the composition is shown in table 5), and the part structure is shown in fig. 4.
The design chemical composition/actual measurement values of the produced parts of the aircraft spoiler actuator are shown in table 5, and the hydrogen content/density equivalent/fracture inspection is shown in table 6; the mechanical properties of the castings are tested after heat treatment, and the heat treatment system is as follows: solution treatment: quenching in water at 543+/-3 ℃ for 10 hours and 75 ℃; aging treatment: 175.+ -. 5 ℃ for 5 hours. The mechanical properties of the product are shown in Table 7.
Table 5 zl114a cast part chemistry (wt.%)
TABLE 6 hydrogen content/Density equivalent/slag inclusion for ZL114A cast parts
TABLE 7 mechanical Properties of ZL114A cast parts
Example 3:
in this embodiment, a D357 prefabricated aluminum ingot is first prepared, and then a certain aircraft door part is prepared by using the D357 prefabricated aluminum ingot, and the part structure is shown in fig. 5.
The aircraft door part design chemistries/measured values produced are shown in Table 8 and the hydrogen content/density equivalent/fracture checks are shown in Table 90; the mechanical properties of the castings are tested after heat treatment, and the heat treatment system is as follows: solution treatment: quenching in water at 543+/-3 ℃ for 10 hours and 75 ℃; aging treatment: 175.+ -. 5 ℃ for 5 hours. The mechanical properties of the product are shown in Table 10.
Table 8D 357 cast part chemistry (wt.%)
Table 9 d357 cast part hydrogen content/density equivalent/slag inclusion
Table 10D 357 mechanical Properties of cast parts
Claims (6)
1. A casting production method of a casting structural member with low hydrogen and low slag inclusion content is characterized by comprising the following steps: the method comprises the following steps (1) - (4):
(1) Raw material preparation: prefabricated aluminum ingots, alBe ingots, al5TiB rods, al10Sr rods, mg ingots and slag forming agents; the prefabricated aluminum ingot is D357 or ZL114A prefabricated aluminum ingot, and the chemical components of the D357 prefabricated aluminum ingot are as follows in percentage by weight: 6.70-7.30% of Si, 0.56-0.60% of Mg, 0.07-0.10% of Ti, 0.05-0.07% of Be, less than 0.12% of Fe, less than 0.01% of Cu, less than 0.01% of Zn, 1/2-2/3% of Mn/Fe=0.01%, less than 0.0012% of P, less than 0.01% of Zr, less than 0.001% of Bi, less than 0.0015% of Na, less than 0.003% of Pb, less than 0.012% of Cr and the balance of Al; the chemical components of the ZL114A prefabricated aluminum ingot are as follows in percentage by weight: 6.70-7.30% of Si, 0.50-0.65% of Mg, 0.07-0.10% of Ti, 0.05-0.07% of Be, less than 0.12% of Fe, less than 0.08% of Cu, less than 0.08% of Zn, 1/2-2/3% of Mn/Fe=0.01%, less than 0.0012% of P, less than 0.15% of Zr, less than 0.001% of Bi, less than 0.0015% of Na, less than 0.003% of Pb, less than 0.012% of Cr and the balance of Al;
the hydrogen content in the prefabricated aluminum ingot is less than 0.10cm 3 H 2 100g, density equivalent < 1.0%; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 A section;
the preparation process of the prefabricated aluminum ingot comprises the following steps (a) - (d):
(a) After the reflection melting furnace is ignited, pouring electrolytic pure aluminum liquid or adding pure aluminum ingot and melting into aluminum liquid; the purity of the electrolytic pure aluminum liquid and the pure aluminum ingot is more than or equal to 99.75 percent;
(b) Heating the aluminum liquid to 720-730 ℃, and adding metal silicon according to the component ratio; after the metal silicon is melted, adding AlBe and Al5Ti ingots according to the composition ratio at 720-730 ℃; analyzing the components of the molten metal, and calculating AlMn ingots with Mn content of 1/2-2/3 of Fe content according to the analysis value of Fe, wherein the adding temperature is 720-730 ℃; then adjusting the temperature of the aluminum liquid to 690-700 ℃, and adding Mg ingots; when the temperature is regulated to 690-700 ℃, adding a refining agent, and introducing nitrogen into the aluminum liquid for degassing for 30-40 minutes;
(c) After detecting that the density and the hydrogen content of the aluminum liquid meet the requirements, analyzing the components of the aluminum liquid, and supplementing magnesium to the required middle limit after analyzing the components;
(d) Pouring a slag removing agent on the surface of the aluminum liquid, and removing scum on the surface of the aluminum liquid; pouring an aluminum ingot at 690-700 ℃ to obtain the prefabricated aluminum ingot;
(2) Remelting a prefabricated aluminum ingot:
the melting furnace is opened, the crucible is preheated, a prefabricated aluminum ingot is added at the same time, the temperature is raised and melted, and after the prefabricated aluminum ingot is melted, the temperature is controlled at 690-700 ℃;
(3) Refining, modification and refining: when the temperature of the aluminum liquid is 690-700 ℃, adding an AlBe rod, an Al-5Ti-B rod, an Al10Sr rod and an Mg ingot, and stirring to ensure that the components are uniform; simultaneously, after 15 minutes of argon rotary blowing refining degassing, sealing and standing for 10 minutes;
(4) And (3) testing the hydrogen content and the density of the aluminum liquid after refining, and casting after meeting the requirements to obtain the D357 or ZL114A cast structural member.
2. The method of casting low hydrogen, low slag inclusion cast structural member of claim 1, wherein: in the step (3), the adding amount of the AlBe ingot is 0.04-0.07% of the weight of the aluminum liquid, the adding amount of the Al-5Ti-B rod is 0.05-0.08% of the weight of the aluminum liquid, the adding amount of the Al10Sr rod is 0.006-0.009% of the weight of the aluminum liquid, and the adding amount of the Mg ingot is 0.1% of the weight of the aluminum liquid.
3. The method of casting low hydrogen, low slag inclusion cast structural member of claim 1, wherein: in the step (4), the casting temperature is 720-730 ℃.
4. A low hydrogen, low slag inclusion cast structure produced by the method of any one of claims 1-3, characterized by: the cast structural member is a D357 or ZL114A cast structural member, and the chemical components of the D357 cast structural member are as follows in percentage by weight: 6.50 to 7.50 percent of Si, 0.55 to 0.60 percent of Mg, 0.05 to 0.10 percent of Ti, 0.04 to 0.07 percent of Be, less than 0.12 percent of Fe, less than 0.01 percent of Cu, less than 0.01 percent of Zn, 1/2-2/3 percent of Mn/Fe=0.01 percent of Sn, less than 0.0015 percent of P, less than 0.01 percent of Zr, less than 0.0015 percent of Bi, less than 0.002 percent of Na, less than 0.03 percent of Pb, less than 0.015 percent of Cr and the balance of Al;
the chemical components of the ZL114A cast structural member are as follows in percentage by weight: 6.50 to 7.50 percent of Si, 0.45 to 0.75 percent of Mg, 0.05 to 0.10 percent of Ti, 0.04 to 0.07 percent of Be, less than 0.12 percent of Fe, less than 0.10 percent of Cu, less than 0.10 percent of Zn, 1/2-2/3 percent of Mn/Fe=0.01 percent of Sn, less than 0.0015 percent of P, less than 0.2 percent of Zr, less than 0.0015 percent of Bi, less than 0.002 percent of Na, less than 0.03 percent of Pb, less than 0.015 percent of Cr and the balance of Al.
5. The low hydrogen, low slag inclusion cast structural member of claim 4 wherein: the hydrogen content in the cast structural member is less than 0.06cm 3 H 2 100g, density equivalent < 1.0%.
6. The low hydrogen, low slag inclusion cast structural member of claim 4 wherein: the cast structural member has uniform ingot fracture structure and fine grains; the average total area of slag inclusion with the length of more than 0.1mm is less than 1.0mm 2 /section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210979617.7A CN115323208B (en) | 2022-08-16 | 2022-08-16 | Low-hydrogen and low-slag-inclusion cast structural member and casting production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210979617.7A CN115323208B (en) | 2022-08-16 | 2022-08-16 | Low-hydrogen and low-slag-inclusion cast structural member and casting production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115323208A CN115323208A (en) | 2022-11-11 |
| CN115323208B true CN115323208B (en) | 2023-06-02 |
Family
ID=83922849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210979617.7A Active CN115323208B (en) | 2022-08-16 | 2022-08-16 | Low-hydrogen and low-slag-inclusion cast structural member and casting production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115323208B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6223805B1 (en) * | 1994-04-22 | 2001-05-01 | Lanxide Technology Company, Lp | Method for manufacturing castable metal matrix composite bodies and bodies produced thereby |
| CN109161742A (en) * | 2018-08-03 | 2019-01-08 | 江苏理工学院 | A kind of 7085 aluminium alloys and preparation method thereof adulterating Sc |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067733A (en) * | 1976-09-01 | 1978-01-10 | Urdea Myron G | High strength aluminum alloy |
| JP2640993B2 (en) * | 1990-06-11 | 1997-08-13 | スカイアルミニウム株式会社 | Aluminum alloy rolled plate for superplastic forming |
| JP4542016B2 (en) * | 2005-10-07 | 2010-09-08 | 株式会社神戸製鋼所 | Manufacturing method of forming aluminum alloy sheet |
| CA2741587C (en) * | 2010-01-29 | 2018-11-27 | General Research Institute For Nonferrous Metals | Aluminium alloy products for manufacturing structural components and method of producing the same |
| EP2471967B1 (en) * | 2010-12-28 | 2014-07-09 | Casa Maristas Azterlan | Method for obtaining improved mechanical properties in recycled aluminium castings free of platelet-shaped beta-phases |
| CN104073699A (en) * | 2014-06-25 | 2014-10-01 | 衢州职业技术学院 | Al-Si-Cu-Mg cast aluminum alloy and preparation method thereof |
| CN105803272B (en) * | 2016-03-31 | 2017-12-15 | 广东省材料与加工研究所 | A kind of high-toughness casting aluminum alloy and preparation method thereof |
| CN108103369B (en) * | 2018-03-08 | 2020-10-09 | 沈阳航空航天大学 | High-manganese high-magnesium Al-Si casting alloy and preparation method thereof |
-
2022
- 2022-08-16 CN CN202210979617.7A patent/CN115323208B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6223805B1 (en) * | 1994-04-22 | 2001-05-01 | Lanxide Technology Company, Lp | Method for manufacturing castable metal matrix composite bodies and bodies produced thereby |
| CN109161742A (en) * | 2018-08-03 | 2019-01-08 | 江苏理工学院 | A kind of 7085 aluminium alloys and preparation method thereof adulterating Sc |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115323208A (en) | 2022-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112143945B (en) | High-strength and high-toughness cast aluminum-silicon alloy containing multiple composite rare earth elements and preparation method thereof | |
| CN109628804B (en) | High-strength aluminum alloy with excellent oxidation effect and preparation method thereof | |
| CN111197132A (en) | Non-heat treatment type high-strength die-casting aluminum alloy and preparation method thereof | |
| CN111690844B (en) | Eutectic Al-Fe-Mn-Si-Mg die casting alloy and preparation method and application thereof | |
| CN114277272A (en) | Composite rare earth alloy for modifying aluminum alloy and preparation method thereof | |
| CN108517446A (en) | A kind of preparation method of high toughness Al-alloy for evacuated die-casting process and products thereof | |
| CN111304475A (en) | High-performance aluminum material for air conditioner connecting pipe and preparation method thereof | |
| CN107587012A (en) | A kind of lightweight casting Al Si Li alloy materials and preparation method thereof | |
| CN112301259A (en) | High-strength die-casting aluminum alloy, and preparation method and application thereof | |
| CN116752018B (en) | Die-casting aluminum alloy material free of heat treatment, preparation method thereof and automobile structural member | |
| CN107675038A (en) | A kind of lightweight casting Al Si Li Cu alloy materials and preparation method thereof | |
| CN114214534A (en) | Modified aluminum alloy and preparation method thereof | |
| CN109913676A (en) | One kind containing 6063 aluminium alloy of yttrium and preparation method | |
| CN110938763B (en) | Preparation method of die-casting aluminum alloy material capable of being anodized and die-casting method | |
| CN109972002B (en) | High-fatigue-resistance aluminum material and preparation method and application thereof | |
| CN115323208B (en) | Low-hydrogen and low-slag-inclusion cast structural member and casting production method thereof | |
| WO2018099272A1 (en) | Semisolid die-casting aluminum alloy and method for preparing semisolid die-casting aluminum alloy castings | |
| CN112522555A (en) | High-toughness extrusion casting aluminum-silicon alloy and preparation method thereof | |
| CN111074105A (en) | Anodic-oxidation die-casting aluminum alloy material, preparation method thereof and die-casting method thereof | |
| CN111575554A (en) | Production method of high-strength wear-resistant aluminum alloy | |
| CN113584361B (en) | High-strength corrosion-resistant 7-series aluminum alloy and casting method thereof | |
| CN112322920B (en) | Aluminum alloy casting production method | |
| CN115323209B (en) | Casting process of ZL101A structural member | |
| CN113462914A (en) | Corrosion-resistant aluminum ingot and preparation method thereof | |
| CN113186433A (en) | 6082 aluminum alloy and process for casting to replace deformed extrusion rod by using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20221124 Address after: 110141 Gate 36, No.16A, No.22 Development Road, Shenyang Economic and Technological Development Zone, Shenyang, Liaoning Applicant after: Shenyang Simon Technology Co.,Ltd. Address before: 110141 Yongxing Street, Hongpo Road, Yuhong Street, Yuhong District, Shenyang City, Liaoning Province (Yuhong Hardware Industrial Park) Applicant before: SHENYANG CHUANGXIN ALLOY CO.,LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |