CN105423751A - Lifting type electric induction furnace with adjustable height - Google Patents
Lifting type electric induction furnace with adjustable height Download PDFInfo
- Publication number
- CN105423751A CN105423751A CN201511017904.6A CN201511017904A CN105423751A CN 105423751 A CN105423751 A CN 105423751A CN 201511017904 A CN201511017904 A CN 201511017904A CN 105423751 A CN105423751 A CN 105423751A
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- China
- Prior art keywords
- heat
- induction furnace
- electric induction
- height adjustable
- heater shell
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/02—Crucible or pot furnaces with tilting or rocking arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/20—Arrangement of controlling, monitoring, alarm or like devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B2014/0843—Lining or casing
Abstract
The invention provides a lifting type electric induction furnace with adjustable height and belongs to the technical field of foundry equipment. The electric induction furnace comprises a furnace body casing, an inner heating furnace and two lifting mechanisms, wherein the lifting mechanisms are symmetrically arranged on two sides of the furnace body casing; the inner heating furnace comprises a heat-resisting liner, an induction coil and a cooling pipe; each lifting mechanism comprises a base, a hydraulic rod, a rotary block, a rotary rod and a driving assembly; each driving assembly comprises a driving motor, a rotary encoder, a reducer and a PLC (programmable logic controller), and the PLC is electrically connected with the driving motor. The height of the electric induction furnace can be adjusted according to pouring requirements of castings, the rotating angle of the electric induction furnace is highly controllable, the metal liquid pouring speed during pouring can be increased, and the quality of the castings can be improved.
Description
Technical field
The present invention relates to Casting Equipment technical field, in particular to a kind of Height Adjustable lift electric induction furnace.
Background technology
Electric induction furnace be a kind of metal material to be carried out efficiently, the equipment of rapid processing.By passing into high frequency big current in heater coil, the strong flux of polarization instantaneous variation in coil, in the direction that the inside of heating object is contrary with heating current, just can produce corresponding very large vortex flow.Due to the existence of resistance in heating object, a large amount of Joule heats can be produced, make the temperature of object self increase rapidly, thus reach the object to metal material heating.When casting various workpiece, need to be molten into the Confucian classics material of liquid by cast.But existing electric induction furnace height is unadjustable, therefore, when pouring into a mould, need to compare position, can successfully be added in die cavity by the metallic solution in electric induction furnace to what regulate electric induction furnace and die cavity to be cast.But the height of existing electric induction furnace is unadjustable, therefore very inconvenient to the adjustment of height.
Summary of the invention
On the one hand, provide a kind of Height Adjustable lift electric induction furnace, the height of adjustable electric induction furnace, thus the cast being convenient to the molten metal liquid in electric induction furnace.
The present invention is achieved in that
A kind of Height Adjustable lift electric induction furnace, comprise: body of heater shell, internally heated oven and two elevating mechanisms, described lifting structure is symmetricly set in the both sides of described body of heater shell, described internally heated oven comprises heat-resisting liner, induction coil and cooling tube, described internally heated oven is arranged in described body of heater shell, described induction coil is set around outside described heat-resisting liner, and described water cooling tube is set around outside described induction coil;
Described elevating mechanism comprises pedestal, hydraulic stem, moving block, dwang and driven unit, described driven unit comprises drive motors, rotary encoder, reductor and PLC, described PLC is electrically connected with described drive motors, the two ends of described hydraulic stem respectively with described pedestal, described moving block is fixedly connected with, described moving block is provided with rotation hole, described dwang and described rotation hole are rotationally connected, one end of described dwang is fixedly connected with described body of heater shell, the other end of described dwang is connected with the output shaft of described reductor, the line shaft of described drive motors is connected with the power shaft of described reductor, the output shaft of described reductor is connected with institute rotary encoder.
Preferably, also comprise yoke, described yoke is arranged at the top of described induction coil.Yoke has constraint induction coil leakage field to external diffusion, improves electromagnetic induction to the efficiency of the heating of the metal material in heat-resisting liner, reduces the heating of other hardwares in addition as magnetic screen.
Preferably, described heat-resisting liner is made up of aluminum-spinel.Magnesium aluminate spinel has good anticorrosive, abrasion resistance, and has the performance characteristics such as heat endurance is high, high temperature resistant, is desirable exotic material.It can replace magnesia-chrome sand to manufacture Mg-Al spinel brick, can be avoided chromium public hazards.
Preferably, also comprise: refractory brick, described refractory brick is arranged between the interior diapire of described heat-resisting liner and described body of heater shell.Because the temperature of the metallic solution in heat-resisting liner is higher, and the bottom of heat-resisting liner arranges water cooling equipment inconvenience, therefore, is provided with refractory brick and can reduces scattering and disappearing of heat, avoid the trouble arranging water cooling equipment simultaneously.
Preferably, also comprise: bell, the side of described bell is provided with and rotates main otic placode, and the open-topped side of described body of heater shell is provided with and rotates time otic placode, the main otic placode of described rotation and described rotation time otic placode are rotationally connected, and described bell coordinates with the open top of described body of heater shell.Due to metal material dissipation due to heat in thermal histories fusing, be easily heated uneven, melt halfway temperature.Bell then can cover the opening of electric induction furnace, thus can reduce the dissipation of heat.In addition, because bell and body of heater shell are rotationally connected, therefore, also interpolation raw metal can be carried out easily.
Preferably, described bell is provided with bleeding point, and described bleeding point is connected with air pump by pipeline.Because the metallics to be heated in electric induction furnace has certain impurity and greasy dirt etc., certain smog can be produced at metallics by during high temperature, thus cause operating personnel and operating environment and determine pollution, be unfavorable for normal operation.Smog in electric induction furnace then can stop by bell, prevents it to be directly vaporized in environment, is then bled by air pump and to be drained by smog, thus kept good operating environment, reduce smog to the injury of human body.
Preferably, described induction coil is made by square copper pipe, is connected with cooling water in described square copper pipe.Copper raw material source is wide, and price is relatively cheap; On the other hand, square copper pipe can make the efficiency of induction coil higher, higher to the efficiency of heating surface of the metal in electric induction furnace.
Preferably, also comprise: heat-insulation layer, described heat-insulation layer is set around described heat-resisting liner outer wall and between described induction coil and described heat-resisting liner.Heat-insulation layer can reduce the dissipation of heat, improves the retention time of the temperature in heat-resisting liner, thus is conducive to the heating to metal material.
Preferably, described heat-insulation layer is woven by alumina silicate fibre and forms.Alumina silicate has low heat conductivity, excellent heat endurance and chemical stability, has good heat-proof quality.Alumina silicate fibre has relatively high elasticity, can play reinforcement effect to heat-resisting liner.In addition, alumina silicate fibre also has certain effect of heat insulation, can reduce the noise in heat-resisting liner when induction coil works to a certain extent.
Preferably, described heat-resisting liner is provided with the liquid outlet of V-shaped, and described liquid outlet stretches out outside described body of heater shell.The setting of liquid outlet is more conducive to toppling over of the molten metal material in heat-resisting liner, when avoiding pouring into a mould, and the splashing of metal liquid thus improve carrying out smoothly of cast work.
Beneficial effect of the present invention:
Height Adjustable lift electric induction furnace has the elevating mechanism that can carry out highly regulating, thus the height of electric induction furnace can be according to circumstances elevated.Therefore, when pouring into a mould, die cavity to be cast and the relative position of electric induction furnace more easily regulate, and greatly reduce and carry out lifting the tedious steps waiting operation to each equipment, simplify cast flow process.On the other hand, the body of heater shell of electric induction furnace can be driven by drive motors, thus rotates, and body of heater shell drives heat-resisting liner to rotate simultaneously, realizes the object to toppling over metal liquid easily.In addition, due to the speed of casting metal solution and angle, the quality tool to the final foundry goods formed has a certain impact.Drive motors is rotated output reduction of speed by reductor by above-mentioned electric induction furnace, and carries out record by rotary encoder to rotational angle, thus accurately can know the rotational angle of heat-resisting liner, realizes the accurate control of rotating.Controlled by the rotational angle of PLC to heat-resisting liner, complete the monitoring of rotation, thus the quality of the foundry goods of cast can be improved to a certain extent, cast automation to a certain extent can also be realized simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows the Height Adjustable lift electric induction furnace that the embodiment of the present invention one provides;
Fig. 2 shows the Height Adjustable lift electric induction furnace (not comprising elevating mechanism and liquid outlet) that the embodiment of the present invention two provides;
Fig. 3 shows the induction coil configuration schematic diagram in the Height Adjustable lift electric induction furnace that the embodiment of the present invention two provides;
Fig. 4 shows the structural representation of the bell in the Height Adjustable lift electric induction furnace that the embodiment of the present invention three provides.
Description of reference numerals
Pedestal 101; Driven unit 102; Hydraulic stem 103; Moving block 104; Dwang 105;
Induction coil 106; Cooling tube 107; Body of heater shell 201; Yoke 202;
Refractory brick 203; Bell 301; Rotate time otic placode 302.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
In describing the invention, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this invention product orientation of usually putting or position relationship when using, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Embodiment one
Consult Fig. 1, present embodiments provide a kind of Height Adjustable lift electric induction furnace, comprising: body of heater shell 201, internally heated oven and two elevating mechanisms, lifting structure is symmetricly set in the both sides of body of heater shell 201.Internally heated oven comprises heat-resisting liner, induction coil 106 and cooling tube 107, and internally heated oven is arranged in body of heater shell 201, and induction coil 106 is set around outside heat-resisting liner, and water cooling tube is set around outside induction coil 106.
Elevating mechanism comprises pedestal 101, hydraulic stem 103, moving block 104, dwang 105 and driven unit 102, driven unit 102 comprises drive motors, rotary encoder, reductor and PLC, PLC is electrically connected with drive motors, the two ends of hydraulic stem 103 respectively with pedestal 101, moving block 104 is fixedly connected with, moving block 104 is provided with rotation hole, dwang 105 and rotation hole are rotationally connected, one end of dwang 105 is fixedly connected with body of heater shell 201, the other end of dwang 105 is connected with the output shaft of reductor, the line shaft of drive motors is connected with the power shaft of reductor, the output shaft of reductor is connected with institute rotary encoder.
This electric induction furnace realizes the adjustment of height by elevating mechanism, can also rotate simultaneously, thus greatly simplify the flow process of the casting metal liquid of electric induction furnace, improves operating efficiency.
When needs highly regulate, carried out the adjustment of the height to electric induction furnace by the lifting of hydraulic control bar 103, come increase by the lifting of hydraulic stem 103 or reduced its height.When toppling over the metal liquid in heat-resisting liner, directly utilize the drive motors reducing motor of elevating mechanism, then by reducing motor, rotation is outputted to dwang 105, drive body of heater shell 201 to rotate further, thus drive heat-resisting liner to rotate.Due to the setting of reductor, the rotating speed of drive motors reduces, and makes the rotation of heat-resisting liner more mild and stable, prevents metal liquid from shaking, and avoids the problem that metal liquid spills heat-resisting liner occurs.In addition, owing to being provided with rotary encoder and PLC, rotary encoder can obtain the rotational angle of body of heater shell 201, and controlled by PLC, when reaching the anglec of rotation of specifying, can stop operating, improving the accurate control of the rotation of heat-resisting liner.Due to the accurate control of heat-resisting liner rotational angle, then the speed of toppling over metal liquid also has higher controllability, is conducive to the raising of the quality of foundry goods.
Embodiment two
Consult Fig. 2, Fig. 3, present embodiments provide a kind of Height Adjustable lift electric induction furnace, comprising: body of heater shell 201, internally heated oven and two elevating mechanisms, lifting structure is symmetricly set in the both sides of body of heater shell 201.Internally heated oven comprises heat-resisting liner, induction coil 106 and cooling tube 107, and internally heated oven is arranged in body of heater shell 201, and induction coil 106 is set around outside heat-resisting liner, and water cooling tube is set around outside induction coil 106.Preferably, induction coil 106 is made by square copper pipe, is connected with cooling water in square copper pipe.Pass into cooling water in square copper pipe, avoid square copper pipe be subject to the impact of excessive temperature and be damaged.
Elevating mechanism comprises pedestal 101, hydraulic stem 103, moving block 104, dwang 105 and driven unit 102, driven unit 102 comprises drive motors, rotary encoder, reductor and PLC, PLC is electrically connected with drive motors, the two ends of hydraulic stem 103 respectively with pedestal 101, moving block 104 is fixedly connected with, moving block 104 is provided with rotation hole, dwang 105 and rotation hole are rotationally connected, one end of dwang 105 is fixedly connected with body of heater shell 201, the other end of dwang 105 is connected with the output shaft of reductor, the line shaft of drive motors is connected with the power shaft of reductor, the output shaft of reductor is connected with institute rotary encoder.
Because induction coil 106 is heated metal material by electromagnetic induction, when the generation magnetic leakage of induction coil 106 will off-energy, cause expending longer time and more energy to the insufficient or needs of the heating of metal material.Based on the problems referred to above, Height Adjustable lift electric induction furnace also comprises yoke 202, and yoke 202 is arranged at the top of induction coil 106.Yoke 202 pairs of magnetic leakages have and certain slacken effect, reduce magnetic loss of energy; On the other hand, the minimizing of magnetic leakage can avoid leakage field to the fuel factor of other hardwares, thus guarantees the use safety of each equipment.
In order to avoid the heat loss of heat-resisting liner, heat-resisting liner uses aluminum-spinel to make.In addition, refractory brick 203 is also provided with between heat-resisting liner and the interior diapire of body of heater shell 201.In addition, heat-resisting liner outer wall also can winding heat-insulation layer, and heat-insulation layer is between induction coil 106 and heat-resisting liner.In the present embodiment, heat-insulation layer is woven by alumina silicate fibre and forms.Alumina silicate fibre has the effect such as thermal resistance, sound insulation, improves the thermal storage time in heat-resisting liner, reduces noise simultaneously.
Based on the object of the metal liquid of conveniently toppling in heat-resisting liner, heat-resisting liner is provided with the liquid outlet of V-shaped, and liquid outlet stretches out outside body of heater shell 201.When heat-resisting liner rotates, metal hot body is wherein gushed out from liquid outlet, can avoid the splashing of metal liquid, reduces the loss of metal liquid.
Embodiment three
Present embodiments provide a kind of Height Adjustable lift electric induction furnace, comprising: body of heater shell 201, internally heated oven and two elevating mechanisms, lifting structure is symmetricly set in the both sides of body of heater shell 201.Internally heated oven comprises heat-resisting liner, induction coil 106 and cooling tube 107, and internally heated oven is arranged in body of heater shell 201, and induction coil 106 is set around outside heat-resisting liner, and water cooling tube is set around outside induction coil 106.
Elevating mechanism comprises pedestal 101, hydraulic stem 103, moving block 104, dwang 105 and driven unit 102, driven unit 102 comprises drive motors, rotary encoder, reductor and PLC, PLC is electrically connected with drive motors, the two ends of hydraulic stem 103 respectively with pedestal 101, moving block 104 is fixedly connected with, moving block 104 is provided with rotation hole, dwang 105 and rotation hole are rotationally connected, one end of dwang 105 is fixedly connected with body of heater shell 201, the other end of dwang 105 is connected with the output shaft of reductor, the line shaft of drive motors is connected with the power shaft of reductor, the output shaft of reductor is connected with institute rotary encoder.
Preferably, electric induction furnace is provided with yoke 202 at the top of induction coil 106, and yoke 202 reduces magnetic loss of energy, improves the utilization ratio of magnetic energy.In addition, refractory brick 203 is also provided with between heat-resisting liner and the interior diapire of body of heater shell 201; Heat-resisting liner outer wall also can be arranged with and form heat-insulation layer by alumina silicate fibre braiding.
The implementation of heat loss is reduced as another kind, electric induction furnace also comprises bell 301, the side of bell 301 is provided with and rotates main otic placode, the open-topped side of body of heater shell 201 is provided with and rotates time otic placode 302, rotate main otic placode to be rotationally connected with rotation time otic placode 302, bell 301 coordinates with the open top of body of heater shell 201.The structure of bell 301 consults Fig. 4.
When metal material containing certain impurity, such as, greasy dirt etc., metal material is heated and can produces a large amount of smog, if discharged by smog not in time, can affect the life safety of operator.Therefore, bell 301 is provided with bleeding point, and bleeding point is connected with air pump by pipeline.When producing a large amount of smog in heat-resisting liner, air pump can be opened the smog in heat-resisting liner is taken away, reduce the impurity content in metal liquid, improve the health of operating environment simultaneously.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.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.
Claims (10)
1. a Height Adjustable lift electric induction furnace, it is characterized in that, comprise: body of heater shell, internally heated oven and two elevating mechanisms, described lifting structure is symmetricly set in the both sides of described body of heater shell, described internally heated oven comprises heat-resisting liner, induction coil and cooling tube, described internally heated oven is arranged in described body of heater shell, and described induction coil is set around outside described heat-resisting liner, and described water cooling tube is set around outside described induction coil;
Described elevating mechanism comprises pedestal, hydraulic stem, moving block, dwang and driven unit, described driven unit comprises drive motors, rotary encoder, reductor and PLC, described PLC is electrically connected with described drive motors, the two ends of described hydraulic stem respectively with described pedestal, described moving block is fixedly connected with, described moving block is provided with rotation hole, described dwang and described rotation hole are rotationally connected, one end of described dwang is fixedly connected with described body of heater shell, the other end of described dwang is connected with the output shaft of described reductor, the line shaft of described drive motors is connected with the power shaft of described reductor, the output shaft of described reductor is connected with institute rotary encoder.
2. Height Adjustable lift electric induction furnace according to claim 1, it is characterized in that, also comprise yoke, described yoke is arranged at the top of described induction coil.
3. Height Adjustable lift electric induction furnace according to claim 2, is characterized in that, described heat-resisting liner is made up of aluminum-spinel.
4. Height Adjustable lift electric induction furnace according to claim 3, is characterized in that, also comprise: refractory brick, and described refractory brick is arranged between the interior diapire of described heat-resisting liner and described body of heater shell.
5. according to the Height Adjustable lift electric induction furnace one of Claims 1-4 Suo Shu, it is characterized in that, also comprise: bell, the side of described bell is provided with and rotates main otic placode, the open-topped side of described body of heater shell is provided with and rotates time otic placode, the main otic placode of described rotation and described rotation time otic placode are rotationally connected, and described bell coordinates with the open top of described body of heater shell.
6. Height Adjustable lift electric induction furnace according to claim 5, it is characterized in that, described bell is provided with bleeding point, and described bleeding point is connected with air pump by pipeline.
7. Height Adjustable lift electric induction furnace according to claim 1, it is characterized in that, described induction coil is made by square copper pipe, is connected with cooling water in described square copper pipe.
8. Height Adjustable lift electric induction furnace according to claim 1, is characterized in that, also comprise: heat-insulation layer, and described heat-insulation layer is set around described heat-resisting liner outer wall and between described induction coil and described heat-resisting liner.
9. Height Adjustable lift electric induction furnace according to claim 8, is characterized in that, described heat-insulation layer is woven by alumina silicate fibre and forms.
10. Height Adjustable lift electric induction furnace according to claim 1, it is characterized in that, described heat-resisting liner is provided with the liquid outlet of V-shaped, and described liquid outlet stretches out outside described body of heater shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511017904.6A CN105423751A (en) | 2015-12-29 | 2015-12-29 | Lifting type electric induction furnace with adjustable height |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511017904.6A CN105423751A (en) | 2015-12-29 | 2015-12-29 | Lifting type electric induction furnace with adjustable height |
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| CN105423751A true CN105423751A (en) | 2016-03-23 |
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| CN109195405A (en) * | 2018-08-23 | 2019-01-11 | 谢明仿 | A kind of electric car inside full-view image image procossing minitype heat radiating device |
| CN110986582A (en) * | 2019-12-10 | 2020-04-10 | 天工爱和特钢有限公司 | Intermediate frequency induction furnace for powder metallurgy high-speed steel smelting and control method thereof |
| CN111306947A (en) * | 2020-03-01 | 2020-06-19 | 程顺平 | Cast iron furnace |
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Application publication date: 20160323 |