CN101879578B - Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof - Google Patents
Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof Download PDFInfo
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- CN101879578B CN101879578B CN 201010205081 CN201010205081A CN101879578B CN 101879578 B CN101879578 B CN 101879578B CN 201010205081 CN201010205081 CN 201010205081 CN 201010205081 A CN201010205081 A CN 201010205081A CN 101879578 B CN101879578 B CN 101879578B
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- mold release
- magnesium alloy
- release agent
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Abstract
The invention discloses a mold release agent for rare-earth magnesium alloy pressure casting and a prepration process thereof. The mold release agent comprises the following components in percentage by mass: 2 to 3 percent of MgCl2, 1 to 3 percent of CaCl2, 2 to 3 percent of Na2SiO4, 3 to 5 percent of MoS2, 1.5 to 5 percent of boric acid, 25 to 35 percent of graphite, 20 to 40 percent of industrial alcohol and 20 to 40 percent of water. The preparation method for the mold release agent for the rare-earth magnesium alloy pressure casting comprises the following steps of: (1) weighing raw materials based on the components in percentage by mass; (2) pouring the weighed water into a clean container; (3) feeding the weighed industrial alcohol into the container, and stirring the industrial alcohol and the water uniformly; (4) feeding the weighed MgCl2, CaCl2, Na2SiO4 and boric acid into the solution prepared in the step (3), and stirring the solution uniformly; (5) feeding the weighed MoS2 into the solution prepared in the step (4), and stirring the solution uniformly; and (6) feeding the weighed graphite into the turbid solution prepared in the step (5), and stirring the solution uniformly to obtain the mold release agent. The invention provides the mold release agent special for the rare-earth magnesium alloy pressure casting with moderate production cost; and the mold release agent fills the blank, can effectively solve the problems of mold sticking of molten steel and non-uniform temperature field distribution during the rare-earth magnesium alloy pressure casting, improves the compactness and smooth finish of a casting surface, is convenient for quick mold release, improves the productivity, and prolongs the service life of a die.
Description
Technical field
The present invention relates to a kind of releasing agent, the specifically a kind of releasing agent that the rare-earth magnesium alloy pressure casting mould is used and preparation method of this releasing agent thereof of being applicable to.
Background technology
Releasing agent is the important auxiliary material during die casting is produced, and it will influence diecast parts shaping surface situation, and will be closely related with piece surface fineness and die life etc.Mostly the light-alloy releasing agent that puts into production use both at home and abroad at present is aluminum alloy mould release agent, does not still have to be exclusively used in the releasing agent that rare-earth magnesium alloy pressure casting is used.Because the magnesium-rare earth melt is strong than the aluminium alloy melt chemism, easy being mingled with die surface reaction generation gets into foundry goods inside, and die surface is exerted an influence; Reduced die life; Rare-earth magnesium alloy solidification wide ranges in addition again, thermal capacitance is low, and casting fluidity is poor slightly than aluminium alloy; Tradition pack alloy releasing agent can't obtain desirable resultant effect concerning magnesium-rare earth.
Along with the exploitation of magnesium-rare earth new material and the development of die-casting rare earth magnesium alloy new technology; It is more and more to make the magnesium-rare earth part through die casting; Structure also becomes increasingly complex, and molten metal sticking to mould, temperature field skewness problem when effectively solving rare-earth magnesium alloy pressure casting are for surface compact property and the fineness that improves diecast parts; More need a kind of releasing agent that rare-earth magnesium alloy pressure casting is used that is exclusively used in; So that the more convenient demoulding, the surface compact property and the fineness of raising diecast parts prolong die life.
Summary of the invention
The objective of the invention is to fill up the blank of prior art; A kind of releasing agent that rare-earth magnesium alloy pressure casting is used that is exclusively used in is provided; And the preparation method of this releasing agent, so that the quick demoulding and raising diecast parts surface compact property and fineness behind the rare-earth magnesium alloy pressure casting prolongs die life.
The object of the invention is realized through following technical proposals:
A kind of rare-earth magnesium alloy pressure casting is used releasing agent, it is characterized in that described releasing agent each component mass percent is:
MgCl
2 2～3％
CaCl
2 1～3％
Na
2SiO
4 2～3％
MoS
2 3～5％
Boric acid 1.5～5%
Graphite 25～35%
Industrial alcohol 20～40%
Water 20～40%.
Described rare-earth magnesium alloy pressure casting is characterized in that with the preparation method of releasing agent this preparation method's preparation steps is:
1. calculate and weigh the mass number of every kind of raw material by each constituent mass percentage of releasing agent;
2. earlier load weighted water is poured in the clean container;
3. load weighted industrial alcohol is dropped in the said vesse, wiring solution-forming stirs;
4. with load weighted MgCl
2, CaCl
2, Na
2SiO
4, boric acid drops in the solution that 3. step prepared, stir;
5. with load weighted MoS
2In the solution that 4. the input step has prepared, stir;
6. load weighted graphite is dropped in the turbid liquid that 5. step prepared, stir.
Compared with prior art; The present invention proposes a kind of production cost moderate, be exclusively used in releasing agent that rare-earth magnesium alloy pressure casting uses and preparation method thereof, filled up this technological gap, molten metal sticking to mould, temperature field problem pockety in the time of effectively solving rare-earth magnesium alloy pressure casting; Cast(ing) surface compactness and fineness have been improved; Be convenient to the quick demoulding, boost productivity, prolong die life.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1:
When casting a kind of magnesium-rare earth housing with the die casting mode, the magnesium-rare earth composition is: RE4.0wt%, and Zr0.7wt%, Y4.0wt%, Zn0.2wt%, all the other are magnesium.Dies cavity is narrow, and foundry goods is complicated, needs based on extrusion process, requires mold temperature to be not less than 350 ℃, requires cast(ing) surface fine and close, highly polished simultaneously, for realizing above-mentioned requirements, the following releasing agent of palpus configuration:
1) mass percent of getting the releasing agent each component is MgCl
22%, CaCl
21%, Na
2SiO
42%, MoS
25%, boric acid 5%, graphite 25%, industrial alcohol 25%, water 35%.
2) the releasing agent preparation steps is:
1. calculate and weigh the mass number of every kind of raw material;
2. earlier load weighted water is poured in the clean container;
3. load weighted industrial alcohol is dropped in the said vesse, wiring solution-forming stirs;
4. with load weighted MgCl
2, CaCl
2, Na
2SiO
4, boric acid drops in the solution that 3. step prepared, stir;
5. with load weighted MoS
2In the solution that 4. the input step has prepared, stir;
6. load weighted graphite is dropped in the turbid liquid that 5. step prepared, stir.
Embodiment 2:
When casting a kind of magnesium-rare earth cylindrical shell with the die casting mode, the magnesium-rare earth composition is: Zn4.2wt%, and Zr0.7wt%, RE1.2wt%, all the other are magnesium.Dies cavity is roomy, and is simple in structure, needs based on extrusion process, requires mold temperature to be not less than 200 ℃, requires cast(ing) surface fine and close, highly polished simultaneously, for realizing above-mentioned requirements, must dispose following releasing agent:
1) mass percent of getting the releasing agent each component is MgCl
23%, CaCl
23%, Na
2SiO
43%, MoS
23%, boric acid 5%, graphite 25%, industrial alcohol 25%, water 33%.
2) the releasing agent preparation steps is:
1. calculate and weigh the mass number of every kind of raw material;
2. earlier load weighted water is poured in the clean container;
3. load weighted industrial alcohol is dropped in the said vesse, wiring solution-forming stirs;
4. with load weighted MgCl
2, CaCl
2, Na
2SiO
4, boric acid drops in the solution that 3. step prepared, stir;
5. with load weighted MoS
2In the solution that 4. the input step has prepared, stir;
6. load weighted graphite is dropped in the turbid liquid that 5. step prepared, stir.
Embodiment 3:
When casting a kind of magnesium-rare earth thin-wall part with the die casting mode, the magnesium-rare earth composition is: neodymium 1.4wt%, and yttrium 2.8wt%, zirconium 0.7wt%, zinc 0.4wt%, all the other are magnesium.Dies cavity is narrow, and foundry goods is complicated, needs based on extrusion process, require to require cast(ing) surface fine and close, highly polished simultaneously with more than the mould and die preheating to 320 ℃, and be to realize above-mentioned requirements, must the following releasing agent of configuration:
1) mass percent of getting the releasing agent each component is MgCl
22.5%, CaCl
22%, Na
2SiO
42.5%, MoS
24%, boric acid 3.5%, graphite 30%, industrial alcohol 28%, water 27.5%.
2) the releasing agent preparation steps is:
1. calculate and weigh the mass number of every kind of raw material;
2. earlier load weighted water is poured in the clean container;
3. load weighted industrial alcohol is dropped in the said vesse, wiring solution-forming stirs;
4. with load weighted MgCl
2, CaCl
2, Na
2SiO
4, boric acid drops in the solution that 3. step prepared, stir;
5. with load weighted MoS
2In the solution that 4. the input step has prepared, stir;
6. load weighted graphite is dropped in the turbid liquid that 5. step prepared, stir.
When casting above-mentioned magnesium-rare earth housing or cylindrical shell or thin-wall part with the die casting mode; Compare with not using this releasing agent at the above-mentioned releasing agent of mould surface spraying; Because releasing agent combines intensity high with die casting; Reduce molten metal to the washing away of mold cavity surface, prevented the magnesium-rare earth mold sticking, improved demoulding efficiency.On the other hand, the equally distributed releasing agent in mold cavity surface has reduced the form-drag of filling of magnesium-rare earth liquation, has improved the cavity filling ability of magnesium-rare earth liquation, has improved cast(ing) surface fineness, has reached the effect of using releasing agent.
Claims (2)
1. a rare-earth magnesium alloy pressure casting is used releasing agent, it is characterized in that described releasing agent each component mass percent is:
MgCl
2 2～3％
CaCl
2 1～3％
Na
2SiO
4 2～3％
MoS
2 3～5％
Boric acid 1.5～5%
Graphite 25～35%
Industrial alcohol 20～40%
Water 20～40%.
2. a rare-earth magnesium alloy pressure casting as claimed in claim 1 is characterized in that with the preparation method of releasing agent this preparation method's preparation steps is:
1. calculate and weigh the mass number of every kind of raw material by each constituent mass percentage of releasing agent;
2. earlier load weighted water is poured in the clean container;
3. load weighted industrial alcohol is dropped in the said vesse, wiring solution-forming stirs;
4. with load weighted MgCl
2, CaCl
2, Na
2SiO
4, boric acid drops in the solution that 3. step prepared, stir;
5. with load weighted MoS
2In the solution that 4. the input step has prepared, stir;
6. load weighted graphite is dropped in the turbid liquid that 5. step prepared, stir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010205081 CN101879578B (en) | 2010-06-18 | 2010-06-18 | Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010205081 CN101879578B (en) | 2010-06-18 | 2010-06-18 | Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101879578A CN101879578A (en) | 2010-11-10 |
| CN101879578B true CN101879578B (en) | 2012-06-27 |
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ID=43051787
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010205081 Expired - Fee Related CN101879578B (en) | 2010-06-18 | 2010-06-18 | Mold release agent for rare-earth magnesium alloy pressure casting and prepration method thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567375B (en) * | 2013-10-09 | 2015-07-15 | 东莞市鹏润化工产品有限公司 | Non-silicone magnesium alloy pressure casting mould release agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390661A (en) * | 2002-07-25 | 2003-01-15 | 上海交通大学 | Paint for casting Mg alloy with metal mould and its preparing process |
| JP2004154833A (en) * | 2002-11-07 | 2004-06-03 | Honda Motor Co Ltd | Releasing agent for casting and casting method using the same |
| RU2258577C2 (en) * | 2002-12-31 | 2005-08-20 | Богатов Александр Александрович | Method of making protective and separating coating |
| CN1911555A (en) * | 2006-08-25 | 2007-02-14 | 蒋文兰 | Alcohoh base casting coating material powder for concave convex rod |
| CN1935410A (en) * | 2005-09-19 | 2007-03-28 | 万丰奥特控股集团有限公司 | Magnesium alloy coating composition and its preparing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3851943B2 (en) * | 2000-03-17 | 2006-11-29 | 日華化学株式会社 | Release agent for die casting |
-
2010
- 2010-06-18 CN CN 201010205081 patent/CN101879578B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1390661A (en) * | 2002-07-25 | 2003-01-15 | 上海交通大学 | Paint for casting Mg alloy with metal mould and its preparing process |
| JP2004154833A (en) * | 2002-11-07 | 2004-06-03 | Honda Motor Co Ltd | Releasing agent for casting and casting method using the same |
| RU2258577C2 (en) * | 2002-12-31 | 2005-08-20 | Богатов Александр Александрович | Method of making protective and separating coating |
| CN1935410A (en) * | 2005-09-19 | 2007-03-28 | 万丰奥特控股集团有限公司 | Magnesium alloy coating composition and its preparing method |
| CN1911555A (en) * | 2006-08-25 | 2007-02-14 | 蒋文兰 | Alcohoh base casting coating material powder for concave convex rod |
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| Publication number | Publication date |
|---|---|
| CN101879578A (en) | 2010-11-10 |
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