CN104741570A - Extrusion casting method of magnesium alloy vehicle engine cylinder cover - Google Patents
Extrusion casting method of magnesium alloy vehicle engine cylinder cover Download PDFInfo
- Publication number
- CN104741570A CN104741570A CN201310721769.8A CN201310721769A CN104741570A CN 104741570 A CN104741570 A CN 104741570A CN 201310721769 A CN201310721769 A CN 201310721769A CN 104741570 A CN104741570 A CN 104741570A
- Authority
- CN
- China
- Prior art keywords
- magnesium alloy
- cylinder cover
- engine cylinder
- extrusion casting
- refining
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an extrusion casting method of a magnesium alloy vehicle engine cylinder cover; and the method comprises five steps of burdening, smelting, mold preparation, extrusion casting and heat treatment. The extrusion casting process enables the manufactured vehicle engine cylinder cover to have higher tensile strength, yield strength and hardness through optimizing the magnesium alloy component design, the process parameters of smelting and extrusion casting and the heat treatment system. The method can improve the blank precision, can reduce the working allowance, can realize low consumption of resources and energy, and can promote the improvement of economic benefit.
Description
Technical field
The invention belongs to casting technology field, be specifically related to a kind of extrusion casting method of magnesium alloy automobile engine cylinder cover.
Background technology
Magnesium alloy automobile engine cylinder cover cylinder cover cap produce and research and development technical support on, domestic automobile cylinder cover cap is than external backwardness relatively, and a lot of products makes a breakthrough in technology and innovation.The development of domestic automobile cylinder cover cap industry should move ahead toward the direction of high-end modern, in the casting technique of current magnesium alloy automobile engine cylinder cover, the automobile engine cylinder cover cap casting finished products Density inhomogeneity made, and easily produce crack, range of application is limited.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, a kind of extrusion casting method of magnesium alloy automobile engine cylinder cover is provided, improve semifinished product precision, reduce allowance, realize the low consumption of resource and the energy, impel the raising of economic benefit.
The extrusion casting method of magnesium alloy automobile engine cylinder cover provided by the invention, comprises the following steps:
(1) prepare burden: the percentage by weight of magnesium alloy materials component is: 6 ~ 8%Al, 0.17 ~ 0.4%Mn, 0.45 ~ 0.9%Zn, 0.8 ~ 1.2%RE, 1.5 ~ 2.5%Ti, Si < 0.05%, Cu < 0.025, Ni < 0.001%, Fe < 0.004%, all the other are Mg;
(2) melting: the magnesium alloy materials prepared is preheated to 170 ~ 190 DEG C in an oven, crucible melting stove is heated up simultaneously, one deck coverture is sprinkled in crucible bottom, magnesium alloy materials through preheating is added in melting furnace, continue heat temperature raising, when in-furnace temperature rises to 350 DEG C, start to pass into protective gas and prevent magnesium alloy from burning, shield gas flow rate is 15 ~ 20%/min of crucible enclosed volume; After magnesium alloy melts completely, continue to be warmed up to 745 ~ 755 DEG C, 0.1 ~ 1wt% the alterant adding liquid magnesium alloy total amount carries out modifying-refining process, processing time 5 ~ 10min, then 760 ~ 765 DEG C are warming up to, the refining agent adding the 1.5 ~ 2.5wt% accounting for liquid magnesium alloy total amount carries out refining treatment, refining time is 5 ~ 10min, after refining completes, remove slag, any coverture or refining agent are no longer spread in aluminium alloy surface, are covered by protective gas completely, and aluminium alloy leaves standstill and to be cooled to pouring temperature 685 ~ 695 DEG C etc. to be cast;
(3) mould is prepared: be fixed on by mould on extrusion casting machine, mould adopts oil path heating mode, first 220 ~ 240 DEG C are preheated to, then in mold cavity, one layer of heat preservation coating and releasing agent is evenly sprayed, coating layer thickness is 15 ~ 18 microns, continue baking dies, make clagging firm, and make mold preheating temperature be increased to 380 ~ 400 DEG C;
(4) extrusion casint: adopt quantitative pouring pump to carry aluminium alloy from melting furnace to extrusion casting machine feed compartment, extrusion casting machine drift steadily advances aluminium alloy, Quick-pressurizing solidification and crystallization to mold cavity, adjustment Squeeze Casting Parameters on Microstructure is: squeeze pressure is 40 ~ 50MPa, dwell time 14 ~ 18s, drift extrusion speed 150 ~ 180mm/s, complete the casting process of magnesium alloy automobile engine cylinder cover, obtain spray;
(5) heat treatment: heat-treated by the blank of squeeze cast form, blank is placed in heat-treatment furnace, heats with stove 2 little of 430 ~ 435 DEG C, is incubated 6 ~ 8 hours air coolings of coming out of the stove; Carry out the Ageing Treatment of 155 ~ 160 DEG C × 6 hours again, obtain magnesium alloy automobile engine cylinder cover.
The extrusion casting method of magnesium alloy automobile engine cylinder cover provided by the invention, its beneficial effect is, optimize technological parameter and the heat treating regime of melting and extrusion casint, the automobile engine cylinder cover cap manufactured is made to have higher tensile strength, higher yield strength and hardness.
Detailed description of the invention
Below in conjunction with an embodiment, the extrusion casting method of magnesium alloy automobile engine cylinder cover provided by the invention is described in detail.
Embodiment
(1) prepare burden: the percentage by weight of magnesium alloy materials component is: 8%Al, 0.4%Mn, 0.5%Zn, 1%RE, 2%Ti, Si 0.04%, Cu 0.024, Ni 0.0009%, Fe 0.003%, all the other are Mg;
(2) melting: the magnesium alloy materials prepared is preheated to 180 DEG C in an oven, crucible melting stove is heated up simultaneously, one deck coverture is sprinkled in crucible bottom, magnesium alloy materials through preheating is added in melting furnace, continue heat temperature raising, when in-furnace temperature rises to 350 DEG C, start to pass into protective gas and prevent magnesium alloy from burning, shield gas flow rate is the 17%/min of crucible enclosed volume; After magnesium alloy melts completely, continue to be warmed up to 750 DEG C, the 0.6wt% alterant adding liquid magnesium alloy total amount carries out modifying-refining process, processing time 8min, then 768 DEG C are warming up to, the refining agent adding the 2wt% accounting for liquid magnesium alloy total amount carries out refining treatment, and refining time is 6min, after refining completes, remove slag, any coverture or refining agent are no longer spread in aluminium alloy surface, are covered by protective gas completely, and aluminium alloy leaves standstill and to be cooled to pouring temperature 690 DEG C etc. to be cast;
(3) mould is prepared: be fixed on by mould on extrusion casting machine, mould adopts oil path heating mode, first 230 DEG C are preheated to, then in mold cavity, one layer of heat preservation coating and releasing agent is evenly sprayed, coating layer thickness is 16 microns, continue baking dies, make clagging firm, and make mold preheating temperature be increased to 395 DEG C;
(4) extrusion casint: adopt quantitative pouring pump to carry aluminium alloy from melting furnace to extrusion casting machine feed compartment, extrusion casting machine drift steadily advances aluminium alloy, Quick-pressurizing solidification and crystallization to mold cavity, adjustment Squeeze Casting Parameters on Microstructure is: squeeze pressure is 45MPa, dwell time 16s, drift extrusion speed 175mm/s, complete the casting process of magnesium alloy automobile engine cylinder cover, obtain spray;
(5) heat treatment: heat-treated by the blank of squeeze cast form, blank is placed in heat-treatment furnace, heats with stove 2 little of 433 DEG C, is incubated 7 hours air coolings of coming out of the stove; Carry out the Ageing Treatment of 158 × 6 hours again, obtain magnesium alloy automobile engine cylinder cover.
The extrusion casting method of magnesium alloy automobile engine cylinder cover, without the need to machining, operation is simple, and the finished size cast out is accurate, effectively ensure that casting quality; Can semifinished product precision be improved, reduce allowance, realize the low consumption of resource and the energy, impel the raising of economic benefit.
Claims (1)
1. a molding sand method for casting production for flange casting, is characterized in that: said method comprising the steps of:
(1) prepare burden: the percentage by weight of magnesium alloy materials component is: 6 ~ 8%Al, 0.17 ~ 0.4%Mn, 0.45 ~ 0.9%Zn, 0.8 ~ 1.2%RE, 1.5 ~ 2.5%Ti, Si < 0.05%, Cu < 0.025, Ni < 0.001%, Fe < 0.004%, all the other are Mg;
(2) melting: the magnesium alloy materials prepared is preheated to 170 ~ 190 DEG C in an oven, crucible melting stove is heated up simultaneously, one deck coverture is sprinkled in crucible bottom, magnesium alloy materials through preheating is added in melting furnace, continue heat temperature raising, when in-furnace temperature rises to 350 DEG C, start to pass into protective gas and prevent magnesium alloy from burning, shield gas flow rate is 15 ~ 20%/min of crucible enclosed volume; After magnesium alloy melts completely, continue to be warmed up to 745 ~ 755 DEG C, 0.1 ~ 1wt% the alterant adding liquid magnesium alloy total amount carries out modifying-refining process, processing time 5 ~ 10min, then 760 ~ 765 DEG C are warming up to, the refining agent adding the 1.5 ~ 2.5wt% accounting for liquid magnesium alloy total amount carries out refining treatment, refining time is 5 ~ 10min, after refining completes, remove slag, any coverture or refining agent are no longer spread in aluminium alloy surface, are covered by protective gas completely, and aluminium alloy leaves standstill and to be cooled to pouring temperature 685 ~ 695 DEG C etc. to be cast;
(3) mould is prepared: be fixed on by mould on extrusion casting machine, mould adopts oil path heating mode, first 220 ~ 240 DEG C are preheated to, then in mold cavity, one layer of heat preservation coating and releasing agent is evenly sprayed, coating layer thickness is 15 ~ 18 microns, continue baking dies, make clagging firm, and make mold preheating temperature be increased to 380 ~ 400 DEG C;
(4) extrusion casint: adopt quantitative pouring pump to carry aluminium alloy from melting furnace to extrusion casting machine feed compartment, extrusion casting machine drift steadily advances aluminium alloy, Quick-pressurizing solidification and crystallization to mold cavity, adjustment Squeeze Casting Parameters on Microstructure is: squeeze pressure is 40 ~ 50MPa, dwell time 14 ~ 18s, drift extrusion speed 150 ~ 180mm/s, complete the casting process of magnesium alloy automobile engine cylinder cover, obtain spray;
(5) heat treatment: heat-treated by the blank of squeeze cast form, blank is placed in heat-treatment furnace, heats with stove 2 little of 430 ~ 435 DEG C, is incubated 6 ~ 8 hours air coolings of coming out of the stove; Carry out the Ageing Treatment of 155 ~ 160 DEG C × 6 hours again, obtain magnesium alloy automobile engine cylinder cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310721769.8A CN104741570A (en) | 2013-12-25 | 2013-12-25 | Extrusion casting method of magnesium alloy vehicle engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310721769.8A CN104741570A (en) | 2013-12-25 | 2013-12-25 | Extrusion casting method of magnesium alloy vehicle engine cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104741570A true CN104741570A (en) | 2015-07-01 |
Family
ID=53582142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310721769.8A Pending CN104741570A (en) | 2013-12-25 | 2013-12-25 | Extrusion casting method of magnesium alloy vehicle engine cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104741570A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014045A (en) * | 2015-08-05 | 2015-11-04 | 中北大学 | Composite squeeze casting method for magnesium alloy special-shaped parts |
| CN110241343A (en) * | 2019-06-24 | 2019-09-17 | 哈尔滨理工大学 | A kind of heat resistance magnesium alloy, a kind of engine cylinder cover and preparation method thereof |
| WO2021147397A1 (en) * | 2020-01-21 | 2021-07-29 | 中信戴卡股份有限公司 | Cast magnesium alloy and preparation method therefor |
| CN113275542A (en) * | 2021-05-25 | 2021-08-20 | 陕西鸿泰元和镁业有限公司 | Preparation method of magnesium alloy new energy automobile battery box |
-
2013
- 2013-12-25 CN CN201310721769.8A patent/CN104741570A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105014045A (en) * | 2015-08-05 | 2015-11-04 | 中北大学 | Composite squeeze casting method for magnesium alloy special-shaped parts |
| CN105014045B (en) * | 2015-08-05 | 2017-03-01 | 中北大学 | A kind of Compound Extrusion casting method of magnesium alloy special-shaped part |
| CN110241343A (en) * | 2019-06-24 | 2019-09-17 | 哈尔滨理工大学 | A kind of heat resistance magnesium alloy, a kind of engine cylinder cover and preparation method thereof |
| WO2021147397A1 (en) * | 2020-01-21 | 2021-07-29 | 中信戴卡股份有限公司 | Cast magnesium alloy and preparation method therefor |
| CN113275542A (en) * | 2021-05-25 | 2021-08-20 | 陕西鸿泰元和镁业有限公司 | Preparation method of magnesium alloy new energy automobile battery box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100453206C (en) | Process of making oil cylinder body and cover with aluminium alloy | |
| CN105200272B (en) | A kind of extrusion casting method of wrought aluminium alloy lampshade | |
| CN107217182A (en) | The manufacture method of aluminium alloy oil pump case and its aluminium alloy oil pump case of manufacture | |
| CN105525157A (en) | Aluminum alloy automobile hub casting process | |
| CN104862539B (en) | A kind of aluminium alloy gear box | |
| CN104561858A (en) | Automotive transmission case and manufacturing method thereof | |
| CN105112802B (en) | A kind of method for preparing wear-resistant plastic mould | |
| CN102828073B (en) | Method for producing powder-coated aluminum alloy section | |
| CN103667840B (en) | A kind of nano-particle reinforcement multicomponent heat-resistant magnesium alloy and preparation method thereof | |
| CN103978187A (en) | Device and method for counter-gravity casting of solidification process controlled titanium-based alloy | |
| CN106636797A (en) | Squeeze casting preparation method for magnalium automobile engine support | |
| CN103966478A (en) | Production technology for aluminium alloy casting rod special for automobile Peugeot hubs | |
| CN104741570A (en) | Extrusion casting method of magnesium alloy vehicle engine cylinder cover | |
| CN103509978B (en) | Heat treatment method for precision casting aluminum alloy | |
| CN102366827B (en) | Extrusion casting method of cylinder cover cap of magnesium alloy automobile engine | |
| CN102925768B (en) | Production method of powder-coated aluminum alloy section bars | |
| CN104004955B (en) | The manufacture method of high performance jetting steel | |
| CN106119631B (en) | Auto parts and components outer housing die casting die material and its processing method | |
| CN103231038B (en) | A kind of pressure casting method of light-alloy | |
| CN108070759A (en) | A kind of aluminum alloy materials and its preparation process for producing automotive hub | |
| CN104741563A (en) | Centrifugal casting process of high-performance engine alloy cylinder sleeve | |
| CN106756336A (en) | A kind of aluminium alloy wheel hub and its production technology | |
| CN107916375A (en) | Founding materials and its casting technique for casting wear-resistant centrifugal cylinder | |
| CN105648169A (en) | Heat treatment process of sprue bush and sprue bush | |
| CN102286710A (en) | Method for preparing alloy semi-solid forming plate blanks by casting and rolling dual control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
|
| WD01 | Invention patent application deemed withdrawn after publication |