Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
The manufacture craft of the magnesium alloy that the embodiment of the present invention provides, heat treating method are described as follows:
1, the magnesium alloy that the embodiment of the present invention provides makes by following three kinds of melting technologies:
Technique one: the magnesium alloy composition provided according to the embodiment of the present invention and cubage also get out the starting material of aequum; magnesium ingot, aluminium ingot, MgMn master alloy and AlNb master alloy or NbAl master alloy is added in resistance furnace; heat up to resistance furnace used, adopt gas shield or magnesium alloy covering agent protection when the above-mentioned metal added melts soon.Add MgRE master alloy (as MgGd, MgY, MgNd etc.) or AlRE master alloy when being warmed up to 720 DEG C-780 DEG C, and stir, 720 DEG C-780 DEG C standing insulations 30 minutes, obtain aluminium alloy.Water a fritter sample with gained aluminium alloy, detect its Melting Quality, as: carry out gas content inspection according to gas content inspection method, if second-rate, need refining treatment be carried out; If up-to-standard, described aluminium alloy temperature adjustment skimmed to 700 DEG C-740 DEG C, then pours into a mould, namely obtain the foundry goods of alloy of the present invention.
In this technique, resistance furnace also can replace with other smelting furnaces; Shielding gas can be argon gas, also can be SF
6, can also be CO
2, or their mixed gas; Magnesium alloy covering agent and master alloy product are market products; Refining treatment method adopts the ordinary method of the industry.
Technique two: the magnesium alloy composition provided according to the embodiment of the present invention and cubage also get out the starting material of aequum, add aluminium ingot, Mn or Mn agent, AlNb master alloy or NbAl master alloy in a vacuum furnace, be warming up to 820 DEG C, insulation 2-8 hour, then cool to 720 DEG C-780 DEG C, add magnesium ingot and RE.720 DEG C-780 DEG C insulations 30 minutes after added melting of metal, obtain aluminium alloy, adopt gas shield or magnesium alloy covering agent protection to prevent aluminium alloy to be oxidized.Water a fritter sample with gained aluminium alloy, detect its Melting Quality, as: the inspection of gas content, if second-rate, need refining treatment be carried out; If up-to-standard, described aluminium alloy temperature adjustment skimmed to 700 DEG C-740 DEG C, then pours into a mould, namely obtain the foundry goods of alloy of the present invention.
In this technique, vacuum oven can substitute with other smelting furnaces such as main frequency furnaces; Shielding gas can be argon gas, also can be SF
6, can also be CO
2, or their mixed gas; Magnesium alloy covering agent, rare earth, Mn agent, master alloy are sell goods on market; Refining treatment method adopts the ordinary method of the industry.
Technique three: the magnesium alloy composition provided according to the embodiment of the present invention and cubage also get out the starting material of aequum; add standard brand MgAlMn system's diecast magnesium alloy and AlNb master alloy or NbAl master alloy in a furnace, when above-mentioned metal melts soon, adopt gas shield or magnesium alloy covering agent protection.Add MgRE master alloy (as MgGd, MgY, MgNd etc.) or AlRE master alloy when being warmed up to 720 DEG C-780 DEG C, and stir, 720 DEG C-780 DEG C standing insulations 30 minutes, obtain aluminium alloy.Water a fritter sample with gained aluminium alloy, detect its Melting Quality, as: carry out gas content inspection according to gas content inspection method, if second-rate, need refining treatment be carried out; If up-to-standard, described aluminium alloy temperature adjustment skimmed to 700 DEG C-740 DEG C, then pours into a mould, namely obtain the foundry goods of alloy of the present invention.
In this technique, shielding gas can be argon gas, also can be SF
6, can also be CO
2, or their mixed gas; Magnesium alloy covering agent, MgRE or AlRE master alloy, Mn agent are sell goods on market; Refining treatment method adopts the ordinary method of the industry.
2, the thermal treatment of magnesium alloy that provides of the embodiment of the present invention and treatment process thereof:
Die casting in the cast magnesium alloys that the embodiment of the present invention provides can not be heat-treated, and the cast member of other form can be heat-treated, general employing T4 solution treatment.T4 solid solution treatment process is: cast member is warming up to 360-480 DEG C in chamber type electric resistance furnace, insulation 1-30 hour, cast member come out of the stove after shrend, water temperature 20-80 DEG C.
The impact of some other inevitable factor in the purity of raw material and melting, castingprocesses is selected by fusion process, the cast magnesium alloys that the embodiment of the present invention provides can contain inevitable impurity, as Zn, Si, Cu etc., as long as weight percent≤0.5% of described inevitable total impurities in described magnesium alloy finished product, weight percent≤0.1% of single contaminant in described magnesium alloy finished product, would not cause obvious impact to the performance of magnesium alloy.
Embodiment 1
Prepare heat resistance magnesium alloy by step described in above-mentioned technique one, foundry goods adopts Hpdc, and described magnesium alloy weight percent consists of Al 6.2%, Mn 0.4%, Gd 0.5%, Nb 0.2%, and all the other are Mg.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 2
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts die cast, and the weight percent of described magnesium alloy consists of Al 1.5%, Mn 0.13%, Sm 0.001%, Nb 0.001%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 480 DEG C in chamber type electric resistance furnace, is incubated 1 hour, cast member come out of the stove after shrend, water temperature 80 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 3
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts semi-solid casting, and the weight percent of described magnesium alloy consists of Al 25%, Mn 2%, Y 16%, Nb 4%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 480 DEG C in chamber type electric resistance furnace, is incubated 8 hours, cast member come out of the stove after shrend, water temperature 80 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 4
Prepare heat resistance magnesium alloy by step described in above-mentioned technique three, foundry goods adopts Hpdc, and standard brand diecast magnesium alloy is AM60A, and the weight percent of heat resistance magnesium alloy consists of Al 6%, Mn 0.2%, Gd 0.2%, Nb 1%, and all the other are Mg.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 5
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts low-pressure casting, and the weight percent of described magnesium alloy consists of Al 1.6%, Mn 0.13%, Ho 0.1%, Nb 0.05%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 360 DEG C in chamber type electric resistance furnace, is incubated 20 hours, cast member come out of the stove after shrend, water temperature 50 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 6
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts precision casting, and the weight percent of described magnesium alloy consists of Al 6.5%, Mn 0.7%, Gd 2%, Nb 1%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 400 DEG C in chamber type electric resistance furnace, is incubated 5 hours, cast member come out of the stove after shrend, water temperature 70 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 7
Prepare heat resistance magnesium alloy by step described in above-mentioned technique one, foundry goods adopts sand mold casting, and the weight percent of described magnesium alloy consists of Al 4.4%, Mn 0.26%, Gd 0.1%, Nb 0.05%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 460 DEG C in chamber type electric resistance furnace, is incubated 1 hour, cast member come out of the stove after shrend, water temperature 60 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 8
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts Hpdc, and the weight percent of described magnesium alloy consists of Al 6.5%, Mn 0.6%, Gd 0.8%, Nb 0.6%, and all the other are Mg.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 9
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts Hpdc, and the weight percent of described magnesium alloy consists of Al 6.5%, Mn 0.6%, Gd0.4%, Nd 0.4%, Nb 0.6%, and all the other are Mg.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 10
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts Hpdc, and the weight percent of described magnesium alloy consists of Al 6.5%, Mn 0.6%, Ce 0.8%, Nb 0.6%, and all the other are Mg.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 11
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts die cast, and the weight percent of described magnesium alloy consists of Al 2%, Mn 0.2%, La 1.2%, Nb 0.8%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 400 DEG C in chamber type electric resistance furnace, is incubated 14 hours, cast member come out of the stove after shrend, water temperature 20 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 12
Prepare heat resistance magnesium alloy by step described in above-mentioned technique one, foundry goods adopts sand mold casting, and the weight percent of described magnesium alloy consists of Al 6%, Mn 0.5%, Tb 0.6%, Nb 0.4%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 480 DEG C in chamber type electric resistance furnace, is incubated 8 hours, cast member come out of the stove after shrend, water temperature 60 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 13
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts die cast, and the weight percent of described magnesium alloy consists of Al 10%, Mn 1%, Dy 8%, Nb 2%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 400 DEG C in chamber type electric resistance furnace, is incubated 14 hours, cast member come out of the stove after shrend, water temperature 20 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 14
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts die cast, and the weight percent of described magnesium alloy consists of Al 3%, Mn 0.65%, Er 1%, Nb 0.7%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 440 DEG C in chamber type electric resistance furnace, is incubated 1 hour, cast member come out of the stove after shrend, water temperature 60 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Embodiment 15
Prepare heat resistance magnesium alloy by step described in above-mentioned technique two, foundry goods adopts die cast, and the weight percent of described magnesium alloy consists of Al 5%, Mn 0.5%, Sc 0.5%, Nb 0.7%, and all the other are Mg.
The thermal treatment (T4 solid solution treatment process) of foundry goods: cast member is warming up to 360 DEG C in chamber type electric resistance furnace, is incubated 30 hours, cast member come out of the stove after shrend, water temperature 40 DEG C.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
Comparative example
Prepare heat resistance magnesium alloy by step described in above-mentioned technique one, foundry goods adopts Hpdc, and described magnesium alloy weight percent consists of Al 6.2%, Mn 0.4%, Gd 0.5%, and all the other are Mg and inevitable impurity.
The performance of the Mg alloy castings that the present embodiment provides is see table 1.
The Mg alloy castings that theres is provided of each embodiment is all containing inevitable impurity above, weight percent≤0.5% of described inevitable total impurities in described magnesium alloy finished product, weight percent≤0.1% of single contaminant in described magnesium alloy finished product.
The Mechanics Performance Testing of foundry goods is carried out on electronic universal tester.The mechanical property of the Mg alloy castings that various embodiments of the present invention and comparative example provide is see table 1.
The mechanical property parameters table of the Mg alloy castings that each embodiment of table 1 provides
As shown in Table 1, the Mg alloy castings that the embodiment of the present invention provides tensile strength under 200 DEG C of high temperature is all greater than 170 MPa, far away higher than MgAlMn system diecast magnesium alloys such as AM60B, there is good resistance toheat, simultaneously see embodiment 1 and comparative example, the Mg alloy castings that the embodiment of the present invention provides, compared with not adding the diecast magnesium alloy of Nb, has better resistance toheat; The tensile strength of embodiment 1,7,8 under 200 DEG C of high temperature is better than other embodiments, and the scope of each component of embodiment 1,7,8 is in Al 4.4-6.5%, Mn 0.26-0.6%, Gd 0.1-0.8%, Nb 0.05-0.6%; By the contrast between embodiment 8-10, in the known RE contained, there is the effect of Gd better; The Mg alloy castings that embodiment 1 provides tensile strength under 200 DEG C of high temperature is the highest, and the Mg alloy castings thermotolerance that embodiment 1 provides is the strongest.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.