CN111621719A - High-strength heat-resistant die-casting aluminum alloy and smelting method - Google Patents
High-strength heat-resistant die-casting aluminum alloy and smelting method Download PDFInfo
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- CN111621719A CN111621719A CN202010647173.8A CN202010647173A CN111621719A CN 111621719 A CN111621719 A CN 111621719A CN 202010647173 A CN202010647173 A CN 202010647173A CN 111621719 A CN111621719 A CN 111621719A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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- 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
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
The invention discloses a high-strength heat-resistant die-casting aluminum alloy which is characterized in that: the die-casting aluminum alloy comprises the following components: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium and titanium, and the balance iron; a method for smelting high-strength heat-resistant die-casting aluminum alloy; step 1, uniformly mixing raw materials in a certain fraction ratio; step 2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at the temperature of 800-; and 3, pouring the solution obtained in the step 2 into an ingot. The high-strength heat-resistant die-casting aluminum alloy and the smelting method increase magnesium element, titanium element and lithium element, and through an increased refining agent and without increasing a high-difficulty processing technology, the strength of the finished alloy is higher.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a high-strength heat-resistant die-casting aluminum alloy and a smelting method.
Background
The solid solution strengthening is that solute atoms are solid-dissolved in matrix crystal lattices, so that the matrix is subjected to crystal lattice distortion to achieve alloy strengthening. As the aluminum matrix, elements having a large solid solubility are Ag.2n, Li.Cu, Mg, Zr, Mn, Si and the like. Among them, Cu not only strongly improves the room temperature strength of the alloy in aluminum alloys, but also forms an Al2Cu phase having good heat resistance, so Cu is a reinforcing element for cast aluminum alloys and a main alloying element for improving the heat resistance of cast aluminum alloys. In the heat-resistant alloy, since the alloy solid solution strengthening effect is rapidly reduced when the temperature reaches 0.5Tm to 0.6T, it is necessary to form a high melting point precipitated phase strengthening effect with a small network or skeleton-like solid solubility in a solid solution, and the heat resistance of 0.6Tr to 0.7T or higher can be achieved. In order to improve the thermal stability of the alloy strengthening phase, it is also required that the added alloy elements have high solid solubility in a liquid state, hardly have solid solubility in a solid state and have a low diffusion coefficient, and that the growth rate of the precipitated phase at a high temperature and the change of the volume fraction thereof are as small as possible. In the prior art, the invention patent application with the application number of 201711111268.2 discloses a high-strength heat-resistant die-casting aluminum alloy and a melting method, although the production cost is reduced, the strength of the finished aluminum alloy is poor, and the requirement cannot be met.
Disclosure of Invention
The invention aims to provide a high-strength heat-resistant die-casting aluminum alloy and a smelting method, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a high strength heat resistant die cast aluminum alloy, said die cast aluminum alloy comprising the following composition: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium and titanium, and the balance iron.
Preferably, the die-casting aluminum alloy comprises the following components in parts by weight: c: 1-3 parts of Mn: 1-2 parts of Si: 1-3 parts of Cr: 8-10 parts of Mo: 7-8 parts of Co: 7-10 parts of W: 3-6 parts of Al: 1-4 parts, N: 3-5ppm, Mg: 2-4 parts of Ti: 3-4 parts.
Preferably, lithium is also included.
Preferably, the part of the lithium in the die-casting aluminum alloy is 2-3 parts.
Also discloses a method for smelting the high-strength heat-resistant die-casting aluminum alloy by applying the substances:
step 1, uniformly mixing raw materials in a certain fraction ratio;
step 2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at the temperature of 800-;
and 3, pouring the solution obtained in the step 2 into an ingot.
Preferably, the smelting agent comprises NaCl, KNO3, CaF2, Naf, Na3A1F6, graphite and rare earth chloride.
Preferably, the smelting agent comprises 0.3-0.8 part of NaCl, KNO 3: 0.5-0.8 parts, CaF 2: 1-2.5 parts, Naf: 2-3 parts, Na3A1F 6: 0.8-1.2 parts of graphite: 4-6 parts of rare earth chloride: 1-2 parts.
Compared with the prior art, the invention has the beneficial effects that: the high-strength heat-resistant die-casting aluminum alloy and the smelting method increase magnesium element, titanium element and lithium element, and through an increased refining agent and without increasing a high-difficulty processing technology, the strength of the finished alloy is higher.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: a high strength heat resistant die cast aluminum alloy, said die cast aluminum alloy comprising the following composition: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium and titanium, and the balance iron;
wherein the parts of each component content are as follows: c: 1 part, Mn: 1 part of Si: 1 part of Cr: 8 parts of Mo: 7 parts and Co: 7 parts of, W: 3 parts of Al: 1 part and N: 3ppm, Mg: 2 parts of Ti: 3 parts of a mixture;
also discloses a method for smelting the high-strength heat-resistant die-casting aluminum alloy, which comprises the following steps:
step 1, uniformly mixing raw materials in a certain fraction ratio;
2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at 800 ℃ for 10 minutes, adding a refining agent for smelting at 800 ℃, stirring in the smelting process, removing oxidation slag floating on the surface of a melt, adding a magnesium ingot and a cymbal, and continuously stirring uniformly;
step 3, pouring the solution obtained in the step 2 into an ingot;
the smelting agent comprises NaCl, KNO3, CaF2, Naf, Na3A1F6, graphite and rare earth chloride;
the smelting agent comprises the following components in parts by weight: 0.3 part, KNO 3: 0.5 part, CaF 2: 1 part, Naf: 2 parts, Na3A1F 6: 0.8 part, graphite: 4 parts of rare earth chloride: 1 part;
and (3) testing: the mechanical property test is carried out on the obtained alloy mechanical property test bar, and the result is as follows:
| mechanical properties | At room temperature | 200℃ | 300℃ | 400℃ |
| Tensile strength sigma b/Mpa | 320 | 270 | 230 | 190 |
。
Example 2: a high strength heat resistant die cast aluminum alloy, said die cast aluminum alloy comprising the following composition: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium and titanium, and the balance iron;
wherein the parts of each component content are as follows: c: 3 parts of Mn: 2 parts of Si: 3 parts of Cr: 10 parts of Mo: 8 parts, Co: 10 parts of, W: 6 parts of Al: 4 parts and N: 5ppm, Mg: 4 parts of Ti: 4 parts of a mixture;
also discloses a method for smelting the high-strength heat-resistant die-casting aluminum alloy, which comprises the following steps:
step 1, uniformly mixing raw materials in a certain fraction ratio;
2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at 1000 ℃ for 12 minutes, adding a refining agent for smelting at 1000 ℃ for 10 minutes, stirring in the smelting process, removing oxidation slag floating on the surface of a melt, adding a magnesium ingot and a cymbal, and continuously stirring uniformly;
step 3, pouring the solution obtained in the step 2 into an ingot;
the smelting agent comprises NaCl, KNO3, CaF2, Naf, Na3A1F6, graphite and rare earth chloride;
the smelting agent comprises the following components in parts by weight: 0.8 part, KN 03: 0.8 part, CaF 2: 2.5 parts, Naf: 3 parts, Na3A1F 6: 1.2 parts, graphite: 6 parts of rare earth chloride: 2 parts of (1);
and (3) testing: the mechanical property test is carried out on the obtained alloy mechanical property test bar, and the result is as follows:
| mechanical properties | At room temperature | 200℃ | 300℃ | 400℃ |
| Tensile strength sigma b/Mpa | 330 | 280 | 240 | 200 |
。
Example 3: a high strength heat resistant die cast aluminum alloy, said die cast aluminum alloy comprising the following composition: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium, titanium and lithium, the balance being iron;
wherein the parts of each component content are as follows: c: 1 part, Mn: 1 part of Si: 1 part of Cr: 8 parts of Mo: 7 parts and Co: 7 parts of, W: 3 parts, A1: 1 part and N: 3ppm, Mg: 2 parts of Ti: 3 parts of Li: 2 parts of (1);
also discloses a method for smelting the high-strength heat-resistant die-casting aluminum alloy, which comprises the following steps:
step 1, uniformly mixing raw materials in a certain fraction ratio;
2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at 800 ℃ for 10 minutes, adding a refining agent for smelting at 800 ℃, stirring in the smelting process, removing oxidation slag floating on the surface of a melt, adding a magnesium ingot and a cymbal, and continuously stirring uniformly;
step 3, pouring the solution obtained in the step 2 into an ingot;
the smelting agent comprises NaCl, KNO3, CaF2, Naf, Na3A1F6, graphite and rare earth chloride;
the smelting agent comprises the following components in parts by weight: 0.3 part, KN 03: 0.5 part, CaF 2: 1 part, Naf: 2 parts, Na3A1F 6: 0.8 part, graphite: 4 parts of rare earth chloride: 1 part;
and (3) testing: the mechanical property test is carried out on the obtained alloy mechanical property test bar, and the result is as follows:
| mechanical properties | At room temperature | 200℃ | 300℃ | 400℃ |
| Tensile strength sigma b/Mpa | 340 | 290 | 250 | 210 |
。
Example 4: a high strength heat resistant die cast aluminum alloy, said die cast aluminum alloy comprising the following composition: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium, titanium and lithium, the balance being iron;
wherein the parts of each component content are as follows: c: 3 parts of Mn: 2 parts of Si: 3 parts of Cr: 10 parts of Mo: 8 parts, Co: 10 parts of, W: 6 parts of Al: 4 parts and N: 5ppm, Mg: 4 parts of Ti: 3-4 parts of Li: 3;
also discloses a method for smelting the high-strength heat-resistant die-casting aluminum alloy, which comprises the following steps:
step 1, uniformly mixing raw materials in a certain fraction ratio;
2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at 1000 ℃ for 12 minutes, adding a refining agent for smelting at 1000 ℃ for 10 minutes, stirring in the smelting process, removing oxidation slag floating on the surface of a melt, adding a magnesium ingot and a cymbal, and continuously stirring uniformly;
step 3, pouring the solution obtained in the step 2 into an ingot;
the smelting agent comprises NaCl, KNO3, CaF2, Naf, Na3A1F6, graphite and rare earth chloride;
the smelting agent comprises the following components in parts by weight: 0.8 part, KNO 3: 0.8 part, CaF 2: 2.5 parts, Naf: 3 parts, Na3A1F 6: 1.2 parts, graphite: 6 parts of rare earth chloride: 2 parts of (1);
and (3) testing: the mechanical property test is carried out on the obtained alloy mechanical property test bar, and the result is as follows:
| mechanical properties | At room temperature | 200℃ | 300℃ | 400℃ |
| Tensile strength sigma b/Mpa | 350 | 300 | 260 | 220 |
。
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a high strength heat-resisting die casting aluminum alloy which characterized in that: the die-casting aluminum alloy comprises the following components: carbon, manganese, silicon, chromium, molybdenum, cobalt, tungsten, aluminum, nitrogen, magnesium and titanium, and the balance iron.
2. The high strength heat resistant die cast aluminum alloy of claim 1, wherein: the die-casting aluminum alloy comprises the following components in parts by weight: c: 1-3 parts of Mn: 1-2 parts of Si: 1-3 parts of Cr: 8-10 parts of Mo: 7-8 parts of Co: 7-10 parts of W: 3-6 parts of Al: 1-4 parts, N: 3-5ppm, Mg: 2-4 parts of Ti: 3-4 parts.
3. The high strength heat resistant die cast aluminum alloy of claim 1, wherein: lithium is also included.
4. The high strength heat resistant die cast aluminum alloy of claim 1, wherein: the parts of the lithium in the die-casting aluminum alloy are 2-3 parts.
5. A high strength heat resistant die cast aluminum alloy melting method using the high strength heat resistant die cast aluminum alloy according to any one of claims 1 to 4, characterized in that:
step 1, uniformly mixing raw materials in a certain fraction ratio;
step 2, putting the raw materials obtained in the step 1 into a crucible, conveying the raw materials into a smelting furnace for smelting at the temperature of 800-;
and 3, pouring the solution obtained in the step 2 into an ingot.
6. The method for smelting the high-strength heat-resistant die-casting aluminum alloy according to claim 5, wherein the method comprises the following steps: the smelting agent comprises NaCl, KNO3, CaF2, Naf, Na3A1F6, graphite and rare earth chloride.
7. The method for smelting the high-strength heat-resistant die-casting aluminum alloy according to claim 6, wherein the method comprises the following steps: the smelting agent comprises 0.3-0.8 part of NaCl, KNO 3: 0.5-0.8 parts, CaF 2: 1-2.5 parts, Naf: 2-3 parts, Na3A1F 6: 0.8-1.2 parts of graphite: 4-6 parts of rare earth chloride: 1-2 parts.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112251650A (en) * | 2020-09-30 | 2021-01-22 | 福建祥鑫股份有限公司 | Aluminum alloy and preparation method thereof |
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