CN113106370A - Preparation method of hot-dip galvanized aluminum-magnesium multi-element alloy - Google Patents

Abstract

The invention discloses a preparation method of a hot-dip galvanized aluminum-magnesium multi-element alloy, which comprises the following components: 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE, 0.5-5 wt% of Mg and the balance of Zn; the preparation method comprises the following steps: mixing, heating and smelting and casting, zinc is asked for to the main raw materials of zinc, and smelt and select the gas reverberatory furnace to place the raw materials in the blending tank respectively and carry out the manual mixing, the mixed raw materials is placed in the gas reverberatory furnace and is smelted, the gas reverberatory furnace heats the raw materials, melts the raw materials to cast. According to the invention, the titanium element is added into the zinc-plated magnesium-aluminum alloy, so that the crystal grains of the cast ingot are refined, the components are uniform, the chemical components of the cast ingot are ensured, and meanwhile, the material manufacturing cost is saved.

Description

Preparation method of hot-dip galvanized aluminum-magnesium multi-element alloy

Technical Field

The invention relates to the technical field of metal manufacturing, in particular to a preparation method of a hot-dip galvanized aluminum-magnesium multi-element alloy.

Background

With the development of casting technology, the casting technology is gradually mature, and continuously develops towards the direction of casting thinner and more complex parts, but a casting is easy to generate air holes in production, the requirements on mechanical properties are not high, the shape of a part is complex, and the advantages of casting technology cost and efficiency are obvious, so that for a complex stressed structural part, the production can be carried out only by adopting a forging mode at present, but the forging mode has low production efficiency and high cost, and the requirements on cost control by large-scale production are difficult to use.

After massive search, the prior art is found, the publication number is CN103725886A, and a method for preparing a multi-element alloy by using copper, nickel, chromium, zinc and iron in sludge is disclosed, which comprises the following specific steps: leaching heavy metal ions in the sludge by using sulfuric acid, and filtering to obtain nontoxic industrial pickling or electroplating sludge and leachate; firstly, adding sodium bisulfite into the leachate, then adopting sodium hydroxide to adjust the pH value of the leachate to 6.9-7.1, forming hydroxide precipitate of copper, nickel, chromium, zinc and iron, filtering and drying, and then determining the weight percentage of the copper, nickel, chromium, zinc and iron; and adding the part with insufficient weight according to the weight percentage of each metal in the multi-element alloy to be prepared, and then burning at high temperature in a reducing atmosphere to obtain the multi-element alloy. The heavy metal ions extracted from the sludge are directly used for preparing the multi-element alloy without complicated separation process, the cost is low, and the method is novel.

In conclusion, the existing multi-element casting technology has many defects, and the mechanical property of the casting cannot be improved under the condition of guaranteeing high-efficiency casting.

Disclosure of Invention

The invention aims to provide a preparation method of a hot-dip galvanized aluminum-magnesium multi-element alloy, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a hot-dip galvanized aluminum-magnesium multi-element alloy comprises the following components: 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE, 0.5-5 wt% of Mg and the balance of Zn;

the preparation method comprises the following steps: mixing, heating, smelting and casting, wherein the main raw material of zinc is zinc with a zero number, and a gas reverberatory furnace is selected for smelting.

Preferably, the mixing process mixes 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE, 0.5-5 wt% of Mg and Zn, and the mixing mode adopts a low melting point artificial mixing mode;

the raw materials are respectively placed in the mixing tank for manual mixing, the process flow is simple, and the rare earth is utilized to purify the good solution of the alloy, so that the material manufacturing cost is reduced;

and the rare earth modification improves the comprehensive performance of the material, and can develop differentiated alloy materials according to different gradual requirements.

Preferably, the mixed raw materials are placed in a gas reverberatory furnace for smelting, and the gas reverberatory furnace heats and melts the raw materials so as to perform casting;

titanium element is added into the raw materials, so that the fluidity of the molten alloy can be improved, and the casting is facilitated.

Preferably, titanium and magnesium are added into the hot-dip galvanized aluminum-magnesium multi-element alloy, so that cast ingot grains can be refined and the components are uniform;

the method can effectively solve the problems of more defects of pinholes and looseness of casting structures, and can also improve the problem of poor casting performance of the Al-Cu alloy.

Preferably, after the casting molding, the hot-dip galvanized aluminum-magnesium alloy ingot is obtained by cooling and molding, and the coating has high corrosion resistance.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE and 0.5-5 wt% of Mg are added into the zinc alloy for hot dipping, crystal grains of the cast ingot can be refined and the components are uniform by adding the titanium element, and the chemical cost of the cast ingot is ensured by taking the No. zero zinc as a raw material and a gas reverberatory furnace as a smelting furnace and adding trace alloying elements, and meanwhile, in the stage of mixing the raw materials, the mode of manually mixing rare earth with low melting point is adopted to replace the mode of adding traditional rare earth and intermediate alloy, so that the manufacturing cost of the material is effectively reduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention provides two embodiments:

the first embodiment is as follows:

a hot galvanizing aluminum magnesium multi-element alloy preparation method comprises the following components: 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE, 0.5-5 wt% of Mg and the balance of Zn; the titanium element is added into the raw materials, so that the fluidity of molten state alloy can be improved, the casting is more facilitated, the titanium element and the magnesium element are added into the hot-dip galvanized aluminum-magnesium multi-element alloy, the crystal grains of the cast ingot can be refined, the components are uniform, the problems of more defects of pinholes and looseness of a casting structure can be effectively solved, and the problem of poor casting performance of the Al-Cu alloy can be improved

The preparation method comprises the following steps: mixing, heating, smelting and casting, wherein the main raw material of zinc is zinc with a specification of zero, and a gas reverberatory furnace is selected for smelting.

Example two:

in the mixing process, 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE and 0.5-5 wt% of Mg and Zn are mixed, and the mixing mode adopts a low-melting-point manual mixing mode;

the raw materials are respectively placed in the mixing tank for manual mixing, the process flow is simple, and the rare earth is utilized to purify the good solution of the alloy, so that the material manufacturing cost is reduced;

and the rare earth modification improves the comprehensive performance of the material, and can develop differentiated alloy materials according to different gradual requirements.

The mixed raw materials are placed in a gas reverberatory furnace for smelting, the gas reverberatory furnace heats the raw materials and melts the raw materials, and then casting is carried out;

titanium element is added into the raw materials, so that the fluidity of the molten alloy can be improved, and the casting is facilitated.

Titanium and magnesium are added into the hot-dip zinc-aluminum-magnesium multi-element alloy, so that the cast ingot grains can be refined and the components are uniform;

the method can effectively solve the problems of more defects of pinholes and looseness of casting structures, and can also improve the problem of poor casting performance of the Al-Cu alloy.

And after casting and forming, cooling and forming to obtain the hot-dip galvanized aluminum-magnesium alloy ingot, wherein the coating has high corrosion resistance.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (5)

1. A preparation method of hot galvanizing aluminum-magnesium multi-element alloy is characterized by comprising the following steps: the hot dip zinc aluminum magnesium multi-element alloy comprises the following components: 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE, 0.5-5 wt% of Mg and the balance of Zn;

the preparation method comprises the following steps: mixing, heating, smelting and casting, wherein the main raw material of zinc is zinc with a specification of zero, and a gas reverberatory furnace is selected for smelting.

2. The method for preparing the hot-dip galvanized aluminum-magnesium multi-element alloy according to claim 1, characterized in that: the mixing process mixes 3-9 wt% of Al, 0.1-2.0 wt% of Si, 0.05-0.2 wt% of Ti, 0.01-0.15 wt% of RE, 0.5-5 wt% of Mg and Zn, and the mixing mode adopts a low melting point manual mixing mode;

the raw materials are respectively placed in the mixing tank for manual mixing, the process flow is simple, and the rare earth is utilized to purify the good solution of the alloy, so that the material manufacturing cost is reduced;

and the rare earth modification improves the comprehensive performance of the material, and can develop differentiated alloy materials according to different gradual requirements.

3. The method for preparing the hot-dip galvanized aluminum-magnesium multi-element alloy according to claim 1, characterized in that: the mixed raw materials are placed in a gas reverberatory furnace for smelting, the gas reverberatory furnace heats the raw materials and melts the raw materials, and then casting is carried out;

titanium element is added into the raw materials, so that the fluidity of the molten alloy can be improved, and the casting is facilitated.

4. The method for preparing the hot-dip galvanized aluminum-magnesium multi-element alloy according to claim 1, characterized in that: titanium and magnesium are added into the hot-dip zinc-aluminum-magnesium multi-element alloy, so that cast ingot grains can be refined and the components are uniform;

the method can effectively solve the problems of more defects of pinholes and looseness of casting structures, and can also improve the problem of poor casting performance of the Al-Cu alloy.

5. The method for preparing the hot-dip galvanized aluminum-magnesium multi-element alloy according to claim 1, characterized in that: and after the casting and forming, cooling and forming are carried out to obtain the hot-dip galvanized aluminum-magnesium alloy ingot, and the coating has higher corrosion resistance.