CN104109740A - Heat treatment method and device for preventing magnesium alloy from surface oxidation - Google Patents
Heat treatment method and device for preventing magnesium alloy from surface oxidation Download PDFInfo
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- CN104109740A CN104109740A CN201410325224.XA CN201410325224A CN104109740A CN 104109740 A CN104109740 A CN 104109740A CN 201410325224 A CN201410325224 A CN 201410325224A CN 104109740 A CN104109740 A CN 104109740A
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Abstract
The invention relate to a heat treatment method and device for preventing magnesium alloy from surface oxidation, belonging to the technical fields of metal materials and metallurgy. The heat treatment method comprises the following steps: laying magnesia powder with the thickness of greater than or equal to 10mm in a steel vessel, putting a magnesium alloy cast ingot to be subjected to heat treatment into the steel vessel, and completely covering with magnesia powder, wherein the covering depth is greater than or equal to 30mm; compacting the magnesia powder to isolate the cast ingot from air; covering a graphite powder layer with the thickness of 3-5mm on the surface layer of the magnesium oxide, and putting a steel top cover on the graphite to further isolate air; and sending the steel vessel with the cast ingot, magnesia powder and graphite powder into a resistance furnace to carry out heat treatment. The heat treatment device provided by the invention can effectively prevent the magnesium alloy cast ingot surface from oxidation in the heat treatment process, has the advantages of simple structure and low cost, is easy to operate, and is a magnesium alloy heat treatment device which can be popularized in industrial production.
Description
Technical field
The invention belongs to metallic substance and metallurgical technology field, particularly a kind of heat treating method and device thereof that prevents Mg alloy surface oxidation.
Background technology
Magnesium alloy is as the lightest structural metallic materials, there is high specific tenacity and specific rigidity, the castability of excellence and high damping vibration-proof performance, be easy to recycle, there is environmental protection characteristic, prospect has a very wide range of applications, be subject to the favor of the industries such as aerospace, telecommunications and automotive industry, become one of potential structural metallic materials of tool.
In magnesium alloy, be generally all added with more alloying element (Al, Zn, RE, Ca, Sr, Mn etc.), in process of setting, there is component segregation, thermal treatment can improve microstructure and the performance of magnesium alloy effectively, thermal treatment can alleviate the casting stress of inside ingot, eliminate component segregation, the microstructure segregation of ingot casting, alleviate the detrimentally affect of low melting point phase alloy strength relative to fragility and plasticity, and can promote being uniformly distributed of alloying element.Reduce and the elements such as significantly reduced Al, Zn and RE for solubility with temperature in magnesium alloy, solid-solution and aging heat treatment is the prerequisite that these alloying elements form precipitation strength.But because the chemical property of magnesium alloy is very active, very easily with airborne oxygen generation chemical reaction, this feature that is easy to oxidizing fire of magnesium alloy has been brought very large difficulty to the thermal treatment of magnesium alloy.Therefore, explore a kind of simple in structure, easy handling, the thermal treatment unit that effectively prevents magnesium alloy ingot surface oxidation that cost is low is one of magnesium alloy research and development problem demanding prompt solution.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of simple in structure, easy handling, the heat treating method and the device thereof that prevent Mg alloy surface oxidation that cost is low.
The technical solution adopted in the present invention is: a kind of heat treating method that prevents Mg alloy surface oxidation, comprises the steps:
Step 1, in Steel Vessel, lay thickness is more than or equal to the magnesium oxide powder of 10mm, magnesium alloy ingot to be heated is put into Steel Vessel and cover completely with magnesium oxide powder, burying depth is more than or equal to 30mm, by magnesium oxide powder compacting, make ingot casting and air insulated, rear for subsequent use;
Step 2, the powdered graphite that is 3-5mm in magnesium oxide Surface mulch a layer thickness are pressed a steel top cover in graphite linings, play the effect of further isolated air;
Step 3, send in resistance furnace and heat-treat placing the Steel Vessel of ingot casting, magnesium oxide powder and powdered graphite.
A kind of heat treating method device used that prevents Mg alloy surface oxidation, be provided with a Steel Vessel, in the inner chamber of Steel Vessel, be provided with from bottom to up magnesium oxide powder layer and powdered graphite layer, and be enclosed with magnesium alloy ingot in magnesium oxide powder layer, distance >=30mm between the upper surface of the upper surface of described magnesium alloy ingot and magnesium oxide powder layer, the thickness of powdered graphite layer is 3-5mm, be provided with steel top cover in the upper surface of powdered graphite layer, steel top cover is pressed on powdered graphite layer and magnesium oxide powder layer in the inner chamber of Steel Vessel.
Further optimize this scheme, the distance >=10mm between the lower surface of described magnesium alloy ingot and the bottom surface of the inner chamber of Steel Vessel.
The invention has the beneficial effects as follows:
A kind of thermal treatment unit that prevents Mg alloy surface oxidation provided by the invention, can effectively prevent from, in magnesium alloy ingot heat treatment process, surface oxidation occurs, have advantages of that simple in structure, easy handling, cost are low, be a kind of can to promote in industrial production for magnesium alloy heat-treating apparatus.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention's thermal treatment unit used.
Reference numeral: 1, steel top cover, 2, Steel Vessel, 3, powdered graphite layer, 4, magnesium oxide powder layer, 5, magnesium alloy ingot.
Embodiment
below in conjunction with accompanying drawing, embodiments of the invention are elaborated, the present embodiment, taking technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in the figure, a kind of heat treating method that prevents Mg alloy surface oxidation, comprises the steps:
Step 1, in Steel Vessel, lay thickness is more than or equal to the magnesium oxide powder of 10mm, magnesium alloy ingot to be heated is put into Steel Vessel and cover completely with magnesium oxide powder, burying depth is more than or equal to 30mm, by magnesium oxide powder compacting, make ingot casting and air insulated, rear for subsequent use;
Step 2, the powdered graphite that is 3-5mm in magnesium oxide Surface mulch a layer thickness are pressed a steel top cover in graphite linings, play the effect of further isolated air;
Step 3, send in resistance furnace and heat-treat placing the Steel Vessel of ingot casting, magnesium oxide powder and powdered graphite.
A kind of heat treating method device used that prevents Mg alloy surface oxidation, be provided with a Steel Vessel 2, in the inner chamber of Steel Vessel 2, be provided with from bottom to up magnesium oxide powder layer 4 and powdered graphite layer 3, and in magnesium oxide powder layer 4, be enclosed with magnesium alloy ingot 5, distance >=30mm between the upper surface of the upper surface of described magnesium alloy ingot 5 and magnesium oxide powder layer 4, the thickness of powdered graphite layer 3 is 3-5mm, be provided with steel top cover 1 in the upper surface of powdered graphite layer 3, steel top cover 1 is pressed on powdered graphite layer 3 and magnesium oxide powder layer 4 in the inner chamber of Steel Vessel 2.
Distance >=10mm between the bottom surface of the lower surface of described magnesium alloy ingot 5 and the inner chamber of Steel Vessel 2.
Technical process is as follows: have the machining of utilization and obtain Steel Vessel, the magnesium oxide powder that lay thickness is 10mm in Steel Vessel, magnesium alloy ingot to be heated is put into Steel Vessel, and magnesium alloy ingot is covered completely with magnesium oxide powder, burying depth is 30mm, by magnesium oxide powder compacting, thereby make ingot casting and air isolated, the powdered graphite that is 4mm in magnesium oxide powder top layer uniform fold a layer thickness, in graphite linings, add a steel top cover, play the effect of further isolated air, to place ingot casting, the Steel Vessel of magnesium oxide powder and powdered graphite is sent in resistance furnace and is heat-treated.
In magnesium alloy ingot heat treatment process, magnesium oxide powder and steel top cover can completely cut off contacting of ingot casting and air effectively, powdered graphite can with airborne oxygen reaction, the oxidizing reaction that more effectively stops casting of magnesium alloy ingot surface to occur.
Claims (3)
1. a heat treating method that prevents Mg alloy surface oxidation, is characterized in that: comprise the steps:
Step 1, in Steel Vessel, lay thickness is more than or equal to the magnesium oxide powder of 10mm, magnesium alloy ingot to be heated is put into Steel Vessel and cover completely with magnesium oxide powder, burying depth is more than or equal to 30mm, by magnesium oxide powder compacting, make ingot casting and air insulated, rear for subsequent use;
Step 2, the powdered graphite that is 3-5mm in magnesium oxide Surface mulch a layer thickness are pressed a steel top cover in graphite linings, play the effect of further isolated air;
Step 3, send in resistance furnace and heat-treat placing the Steel Vessel of ingot casting, magnesium oxide powder and powdered graphite.
2. a kind of heat treating method device used that prevents Mg alloy surface oxidation according to claim 1, it is characterized in that: be provided with a Steel Vessel, in the inner chamber of Steel Vessel, be provided with from bottom to up magnesium oxide powder layer and powdered graphite layer, and be enclosed with magnesium alloy ingot in magnesium oxide powder layer, distance >=30mm between the upper surface of the upper surface of described magnesium alloy ingot and magnesium oxide powder layer, the thickness of powdered graphite layer is 3-5mm, be provided with steel top cover in the upper surface of powdered graphite layer, steel top cover is pressed on powdered graphite layer and magnesium oxide powder layer in the inner chamber of Steel Vessel.
3. device according to claim 2, is characterized in that: the distance >=10mm between the lower surface of described magnesium alloy ingot and the bottom surface of the inner chamber of Steel Vessel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410325224.XA CN104109740A (en) | 2014-07-10 | 2014-07-10 | Heat treatment method and device for preventing magnesium alloy from surface oxidation |
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| CN201410325224.XA CN104109740A (en) | 2014-07-10 | 2014-07-10 | Heat treatment method and device for preventing magnesium alloy from surface oxidation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106984A (en) * | 2017-12-08 | 2018-06-01 | 成都师范学院 | A kind of anti-metal sample high-temperature oxidization equipment and method |
| CN110982998A (en) * | 2019-12-25 | 2020-04-10 | 安徽应流铸业有限公司 | Quenching process method for preventing workpiece from being oxidized |
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| CN102978492A (en) * | 2012-11-30 | 2013-03-20 | 东北大学 | Rare-earth and Zr reinforced Mg-Li based wrought magnesium alloy and preparation method thereof |
| CN102978551A (en) * | 2012-11-30 | 2013-03-20 | 东北大学 | Heat treatment method for preventing Li removal and oxidization of Mg-Li based magnesium alloy surface |
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Patent Citations (6)
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| JPH05202455A (en) * | 1992-01-28 | 1993-08-10 | Nippon Yakin Kogyo Co Ltd | Method for preventing melt sticking of ti-ni laminated plate of tini sheet |
| CN1709688A (en) * | 2005-06-28 | 2005-12-21 | 太原理工大学 | Anticorrosive magnesium-aluminium composite material and its preparing method |
| CN1995425A (en) * | 2006-12-29 | 2007-07-11 | 清华大学 | Magnesium alloy and its preparation method |
| CN102978492A (en) * | 2012-11-30 | 2013-03-20 | 东北大学 | Rare-earth and Zr reinforced Mg-Li based wrought magnesium alloy and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106984A (en) * | 2017-12-08 | 2018-06-01 | 成都师范学院 | A kind of anti-metal sample high-temperature oxidization equipment and method |
| CN110982998A (en) * | 2019-12-25 | 2020-04-10 | 安徽应流铸业有限公司 | Quenching process method for preventing workpiece from being oxidized |
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Application publication date: 20141022 |