CN105772658B - A kind of large scale magnesium alloy ingot running gate system and method - Google Patents

A kind of large scale magnesium alloy ingot running gate system and method Download PDF

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Publication number
CN105772658B
CN105772658B CN201410826802.8A CN201410826802A CN105772658B CN 105772658 B CN105772658 B CN 105772658B CN 201410826802 A CN201410826802 A CN 201410826802A CN 105772658 B CN105772658 B CN 105772658B
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mould
magnesium alloy
blast pipe
alloy ingot
large scale
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CN105772658A (en
Inventor
张奎
李永军
李兴刚
马鸣龙
石国梁
袁家伟
李婷
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GRIMN Engineering Technology Research Institute Co Ltd
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Beijing General Research Institute for Non Ferrous Metals
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Abstract

The invention discloses a kind of large scale magnesium alloy ingot running gate system and method, including:Die holder, lower mould, upper mould, taper oblique top, depositing funnel, blast pipe, umbrella shape inclined-plane;Die holder is placed on cooling platform moving up and down, and round boss is reserved on die holder top, is fitted close between boss and lower mould, and upper mould is connected with lower mould by neck;Taper oblique top is connected by neck with upper mould top, and taper oblique top has a preformed hole, and the lower end of depositing funnel is placed in the preformed hole and extends downward into lower mould bottom;Blast pipe is through depositing funnel and exposes the lower end of depositing funnel;Umbrella shape inclined-plane is located at below blast pipe, and hole is arranged at top, and its bottom is extended respectively at mould inner wall;The lower end of blast pipe is welded with the hole periphery, blast pipe is connected with the hole.Magnesium alloy ingot is prepared using the present invention, metal aoxidizes, easily controllable production technology small with scaling loss in production process, and high yield rate is simple to operate, it is easy to accomplish.

Description

A kind of large scale magnesium alloy ingot running gate system and method
Technical field
The present invention relates to a kind of large scale magnesium alloy ingot running gate system and method, is closed for preparing large scale high-quality magnesium Golden ingot casting.
Background technology
As structural metallic materials most light at present, magnesium alloy has specific strength height, the good, rapid heat dissipation of damping performance etc. a lot Advantage, it is set all to be with a wide range of applications in many fields such as Aero-Space, automobile, weapons.With above-mentioned field not Disconnected development, performance and dimensions to magnesium alloy materials are proposed higher requirement.It is right in the industrialized production of reality In magnesium alloys such as traditional AZ80, ZK60, in diameter reaches 500~600mm of Φ large scale ingot blank casting process, due to casting Cooldown rate differs greatly inside and outside ingot, setting time is grown, and easily produces serious component segregation or ingot blank center portion cracking occurs now As.And for high-strength temperature-resistant but Plastic phase is to the magnesium alloy of the high rare-earth contents such as relatively low EW75, WE83, WE91, its melting, pour Casting temperature is relatively higher, and thermal conductivity is lower, and solidification shrinkage is again very big, and intensity of cooling is small in ingot blank casting process, setting time Long, component segregation is serious;Intensity of cooling is big, and solidification shrinkage is uneven, will produce very big residualinternal stress, easily causes ingot Base center portion ftractures.Using semi-continuous casting mode, ingotism, the situation of cracking can be improved, but be more than 500mm for diameter Magnesium alloy ingot, especially large-sized magnesium-rare earth ingot casting, semi-continuous casting mode is equally difficult to solve ingot casting solidifying The problem of Gu internal-external temperature difference is big during, segregation is serious or even ftractures, also generally existing ingot casting surface cold shut is deep, causes subsequently to cut It is big to cut processing capacity, founding link cost is high, recovery rate is low.
The content of the invention
It is an object of the invention to provide a kind of large scale magnesium alloy ingot running gate system, for preparing large scale high-quality Magnesium alloy ingot.
Another object of the present invention is to provide one kind to prepare magnesium conjunction using the large scale magnesium alloy ingot running gate system The method of golden ingot casting.
To achieve the above object, the present invention uses following technical scheme:
A kind of large scale magnesium alloy ingot running gate system, including:Die holder, lower mould, upper mould, taper oblique top, depositing funnel, row Tracheae, umbrella shape inclined-plane;Die holder is placed on cooling platform moving up and down, and round boss is reserved on die holder top, and boss is with It is fitted close between mould, upper mould is connected with lower mould by neck;Taper oblique top is connected by neck with upper mould top, taper oblique top With a preformed hole, the lower end of depositing funnel is placed in the preformed hole and extends downward into lower mould bottom;Blast pipe is through cast Funnel and the lower end for exposing depositing funnel;Umbrella shape inclined-plane is located at below blast pipe, and hole is arranged at top, and its bottom extends respectively to close At mould inner wall;The lower end of blast pipe is welded with the hole periphery, blast pipe is connected with the hole.
Wherein, the top of the depositing funnel has support bar to fix, and its underpart is positioned by locating rod.The blast pipe it is upper End is fixed on the adjustable support of upper-lower position.
The radial dimension of the inside of the lower mould and upper mould is 500-1000mm.Umbrella shape inclined-plane bottom margin is apart from mould The distance for having inwall is 10mm.
Use the large scale magnesium alloy ingot running gate system prepare the method for magnesium alloy ingot for:Will be according to alloying component Magnesium alloy fused mass after dispensing melting, filtering is transferred in depositing funnel, and the lower reduction of speed of platform is cooled down by adjusting die holder bottom Degree, it is synchronous with the rate of climb holding of melt liquid level in mould, it is always ensured that the outlet of infusion pump and the lower port of depositing funnel Submerge below magnesium alloy fused mass liquid level;It is by the way of gas heating, the taper oblique top being connected with upper mould is fast after being poured Speed is heated to more than 600 DEG C, and is incubated more than 30min, then covers steel taper oblique top with heat-preservation cotton, ensures magnesium in mould Alloy melt top final set, make abundant feeding in Casting Ingot Solidification Process.
The present invention magnesium alloy ingot running gate system in, all parts using heat-resisting steel or stainless steel make and Into.
The advantage of the invention is that:
Magnesium alloy ingot is prepared using the magnesium alloy ingot running gate system of the present invention, metal oxidation and scaling loss in production process It is small, and easily controllable production technology, surface amount of machining is few, and high yield rate is simple to operate, it is easy to accomplish, it is particularly suitable for mesh The production of the large scale magnesium alloy ingot of preceding heterogeneity.
It is few using the large scale magnesium alloy ingot impurity content prepared by the magnesium alloy ingot running gate system of the present invention, it is loose The defects of hole, is few, and structural constituent is uniform, and surface quality is good.
Brief description of the drawings
Fig. 1 is the structural representation of large scale magnesium alloy ingot casting system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in further detail, but is not meant to the scope of the present invention Limitation.
As shown in figure 1, the large scale magnesium alloy ingot running gate system of the present invention includes:Die holder 1, lower mould 2, upper mould 3, taper Oblique top 4, depositing funnel 5, blast pipe 6, umbrella shape inclined-plane 7;Die holder 1 is placed on cooling platform moving up and down, the top of die holder 1 Reserved round boss, is fitted close, upper mould 3 is connected with lower mould 2 by neck between boss and lower mould 2;Taper oblique top 4 passes through card Groove is connected with the upper top of mould 3, and taper oblique top 4 has a preformed hole, and the lower end of depositing funnel 5 is placed in the preformed hole and to downward Extend lower mould bottom;Blast pipe 6 is through depositing funnel 5 and exposes the lower end of depositing funnel;Umbrella shape inclined-plane is located at below blast pipe, Hole is arranged at top, and its bottom is extended respectively at mould inner wall;The lower end of blast pipe and the hole periphery are welded, make blast pipe with The hole connects.
Wherein, the top of depositing funnel 5 has support bar 9 to fix, and its underpart is positioned by locating rod 8.The upper end of blast pipe 6 is consolidated It is scheduled on the adjustable support of upper-lower position.
The present invention magnesium alloy ingot running gate system in, all parts using heat-resisting steel or stainless steel make and Into.
The application method of the present invention is specific as follows:
The cast above mould will be transferred to infusion pump according to the magnesium alloy fused mass after the melting of alloying component dispensing, filtering In funnel, and by adjusting the flow velocity of magnesium alloy fused mass in infusion pump, there are enough melts in funnel is ensured, make infusion pump While outlet is immersed in funnel below melt liquid level always, the lower port of depositing funnel is set also to submerge magnesium alloy fused mass liquid as early as possible Below face, avoid volume gas in casting process or produce oxide inclusion because melt burns.It is flat by adjusting the cooling of die holder bottom The decrease speed of platform, it is synchronous with the rate of climb holding of melt liquid level in mould, it is always ensured that the outlet and cast leakage of infusion pump The lower port of bucket is submerged below magnesium alloy fused mass liquid level.
The blast pipe being connected with umbrella shape beveled top end can discharge the air between umbrella shape steel inclined-plane and liquid level, cast The locating rod of the lower end steel pipe external symmetry connection of funnel can ensure that umbrella shape steel inclined-plane is located in the middle part of mould, ensure that magnesium alloy melts Body is equably flowed in the middle part of mould by umbrella shape steel inclined-plane at mould inner wall, magnesium alloy fused mass temperature in mould is kept equal It is even, reduce the temperature difference in ingot casting edge and core process of setting, make the structural constituent of ingot casting different parts more uniform.
After being poured, by the way of gas heating, the steel taper oblique top being connected with upper mould is quickly heated up to 600 More than DEG C, and more than 30min is incubated, then covers steel taper oblique top with heat-preservation cotton, ensure magnesium alloy fused mass top in mould Final set, make abundant feeding in Casting Ingot Solidification Process, avoid the defects of loose, hole in ingot casting being present, ensure above and below ingot casting Structural constituent is uniform, and improves ingot surface quality.
Embodiment 1:It is prepared by Φ 500-1000mm Mg-RE-Zr magnesium alloy ingots
1st, prepared by alloy melt
The power supply of melting furnace is connected, melting furnace is warming up to 600-620 DEG C, protective gas (0.2- is passed through into melting furnace 0.5%SF6+N2).The pure magnesium ingot for being preheating to 260-360 DEG C is divided into some batches, treats that first magnesium alloy ingot is completely melt Afterwards, then in batches remaining pure magnesium ingot by preheating is added in melting furnace, specific addition is submerged in magnesium liquid completely with magnesium ingot In be defined.So repeatedly, until after required pure magnesium ingot all adds and be completely melt, with spoon of skimming by the scum silica frost of molten surface Clean out, melt temperature is controlled at 760-780 DEG C.By the pure rare earth ingot after preheating, Mg-30Zr intermediate alloy ingots together with The charging basket for holding them is submerged in magnesium melt together, by magnesium melt temperature control at 780-790 DEG C, treats rare earth, Mg-30Zr After being completely dissolved, then 30-40min is incubated at such a temperature, all alloying elements is evenly distributed in magnesium melt.Afterwards, pour Spectrum samples are noted, carry out on-the-spot sample analysis, if composition and content are unqualified, can feed adjustment, until qualified.
2nd, alloy melt is poured into a mould
The magnesium alloy fused mass that mentioned component meets to require is transferred in the steel funnel above mould with infusion pump, and led to The flow velocity of magnesium alloy fused mass in adjustment infusion pump is crossed, there are enough melts in funnel is ensured, the outlet of infusion pump is soaked always While in funnel below melt liquid level, the lower port of depositing funnel is also submerged below magnesium alloy fused mass liquid level as early as possible, keep away Exempt from volume gas in casting process or produce oxide inclusion because melt burns.The lower reduction of speed of platform is cooled down by adjusting die holder bottom Degree, it is synchronous with the rate of climb holding of melt liquid level in mould, it is always ensured that the outlet of infusion pump and the lower port of depositing funnel Submerge below magnesium alloy fused mass liquid level.It is by the way of gas heating, the steel taper being connected with upper mould is oblique after being poured Top quickly heats up to more than 600 DEG C, and is incubated more than 30min, then steel taper oblique top is covered with heat-preservation cotton, until ingot casting is complete Dismantled successively again after full solidification taper oblique top, upper die and lower die, then carry out demoulding processing.

Claims (7)

  1. A kind of 1. large scale magnesium alloy ingot running gate system, it is characterised in that including:Die holder, lower mould, upper mould, taper oblique top, pour Note hopper, blast pipe, umbrella shape inclined-plane;Die holder is placed on cooling platform moving up and down, and round boss is reserved on die holder top, It is fitted close between boss and lower mould, upper mould is connected with lower mould by neck;Taper oblique top is connected by neck with upper mould top, Taper oblique top has a preformed hole, and the lower end of depositing funnel is placed in the preformed hole and extends downward into lower mould bottom;Blast pipe Through depositing funnel and expose the lower end of depositing funnel;Umbrella shape inclined-plane is located at below blast pipe, and hole is arranged at top, and its bottom is prolonged respectively Extend at mould inner wall;The lower end of blast pipe is welded with the hole periphery, blast pipe is connected with the hole.
  2. 2. large scale magnesium alloy ingot running gate system according to claim 1, it is characterised in that the depositing funnel it is upper Portion has support bar to fix, and its underpart is positioned by locating rod.
  3. 3. large scale magnesium alloy ingot running gate system according to claim 1, it is characterised in that the upper end of the blast pipe It is fixed on the adjustable support of upper-lower position.
  4. 4. large scale magnesium alloy ingot running gate system according to claim 1, it is characterised in that the lower mould and upper mould Internal radial dimension is 500-1000mm.
  5. 5. large scale magnesium alloy ingot running gate system according to claim 1, it is characterised in that umbrella shape inclined-plane bottom The distance of Edge Distance mould inner wall is 10mm.
  6. 6. the large scale magnesium alloy ingot running gate system according to any one of claim 1-5, it is characterised in that all Part is made using heat-resisting steel or stainless steel.
  7. 7. the side of magnesium alloy ingot is prepared using the large scale magnesium alloy ingot running gate system any one of claim 1-6 Method, it is characterised in that will be transferred in depositing funnel, pass through according to the magnesium alloy fused mass after the melting of alloying component dispensing, filtering The decrease speed of die holder bottom cooling platform is adjusted, it is synchronous with the rate of climb holding of melt liquid level in mould, it is always ensured that defeated The outlet of liquid pump and the lower port of depositing funnel are submerged below magnesium alloy fused mass liquid level;After being poured, using gas heating Mode, the taper oblique top being connected with upper mould is quickly heated up to more than 600 DEG C, and be incubated more than 30min, then covered with heat-preservation cotton Lid steel taper oblique top, ensure magnesium alloy fused mass top final set in mould, make abundant feeding in Casting Ingot Solidification Process.
CN201410826802.8A 2014-12-25 2014-12-25 A kind of large scale magnesium alloy ingot running gate system and method Active CN105772658B (en)

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CN106623822B (en) * 2017-01-10 2018-06-08 江西江钨稀有金属新材料股份有限公司 A kind of Nd Fe B alloys ingot mold
CN111203521B (en) * 2020-01-09 2020-12-25 上海大学 Annular ingot casting equipment and casting method thereof

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Publication number Priority date Publication date Assignee Title
CN1174771A (en) * 1996-08-26 1998-03-04 宋修民 Melted aluminium casting technology and equipment
CN1419983A (en) * 2002-12-05 2003-05-28 宁夏惠冶镁业有限公司 Method for casting magnesium and magnesium alloy ingot
CN201432083Y (en) * 2009-07-13 2010-03-31 淄博宏泰防腐有限公司 Deformed magnesium alloy ingot casting shunt plate
CN202571172U (en) * 2012-02-23 2012-12-05 台州职业技术学院 Pouring device for magnesium and rare earth alloy casting die
CN103203436A (en) * 2013-04-24 2013-07-17 宁波盛发铜业有限公司 Novel convenient casting device for experiment
CN103464695A (en) * 2013-09-09 2013-12-25 江苏华威机械制造有限公司 Calm steel die casting device and process

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US20090126894A1 (en) * 2007-11-19 2009-05-21 General Electric Company Liquid metal directional casting apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1174771A (en) * 1996-08-26 1998-03-04 宋修民 Melted aluminium casting technology and equipment
CN1419983A (en) * 2002-12-05 2003-05-28 宁夏惠冶镁业有限公司 Method for casting magnesium and magnesium alloy ingot
CN201432083Y (en) * 2009-07-13 2010-03-31 淄博宏泰防腐有限公司 Deformed magnesium alloy ingot casting shunt plate
CN202571172U (en) * 2012-02-23 2012-12-05 台州职业技术学院 Pouring device for magnesium and rare earth alloy casting die
CN103203436A (en) * 2013-04-24 2013-07-17 宁波盛发铜业有限公司 Novel convenient casting device for experiment
CN103464695A (en) * 2013-09-09 2013-12-25 江苏华威机械制造有限公司 Calm steel die casting device and process

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