CN105081263A - Casting method for high-strength corrosion-resisting brake assisting vacuum pump casing - Google Patents
Casting method for high-strength corrosion-resisting brake assisting vacuum pump casing Download PDFInfo
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Abstract
According to a casting method for a high-strength corrosion-resisting brake assisting vacuum pump casing, the defects of air holes and shrinkage holes appearing frequently can be overcome by degasification and dehydrogenation generated by manufacturing processes of drying and preheating, raw material smelting, furnace refining, repeated refining, external refining, casting equipment preheating, anisocharic casting and casting inspection. Furthermore, the high strength and the high corrosion resistance of products can be guaranteed through composition proportion and parameter determination. Thus, the casting method has the beneficial effects of being reasonable in matching and parameter design, controllable in product quality and excellent in product quality performance.
Description
Technical field
The present invention relates to a kind of casting method of the power-assisted vavuum pump that brakes, be specifically related to the casting method of the brake power-assisted vavuum pump housing that a kind of intensity is high, corrosion resistance is strong.
Background technology
Current brake power-assisted vavuum pump housing is all adopt pouring procedure manufacture by aluminum alloy die casting mostly, but the structure of brake power-assisted vavuum pump shell casting is relatively complicated, housing wall in uneven thickness, there will be when in casting process, motlten metal injection enters casting film cavity be involved in air, molten metal casting is not enough; Therefore, when braking automobile power-assisted vavuum pump housing adopts aluminum alloy die casting to manufacture, often the defects such as pore, shrinkage cavity, seepage can easily be there is; And produced product defect rate is high, raw material and energy waste is serious, production efficiency is low, causes production cost high; Simultaneously gained housing wearability, corrosion resistance is poor, thermal coefficient of expansion is higher; In addition, current casting method complex process, product quality are not easy control, Stress control is unreasonable.If employ poor wearability and this kind of problem defect braking automobile power-assisted vavuum pump housing having influence on traffic safety of corrosion resistance, be so easy to the generation causing security incident.
Summary of the invention
Make improvement for the problems referred to above, the invention provides the casting method of a kind of high strength corrosion resistant brake power-assisted vavuum pump housing, the method, by improving element proportioning and the technological process of raw material, effectively improves wearability of the present invention and corrosion resistance.
In order to solve the problem, the invention provides following technical scheme:
A casting method for high strength corrosion resistant brake power-assisted vavuum pump housing, concrete steps are as follows:
(1) drying and forewarm:
The coating of melting instrument and smelting equipment remained on surface and rusty stain are removed, smelting equipment is warming up to 300-350 DEG C, be incubated 0.5 hour, afterwards temperature is risen to 350-400 DEG C by the speed being not more than 10 DEG C/min, simultaneously at smelting equipment interior surface even application one deck protective coating, then by the speed being not less than 40 DEG C/min, temperature is risen to 550-650 DEG C, insulation 1-1.5 hour; Pending industrial additive is carried out dewatered drying by insulation simultaneously, afterwards by not being warming up to 80-130 DEG C higher than the speed of 5 DEG C/min, and is incubated 0.5-1 hour.
(2) raw material melting:
According to given Ingredients Weight proportioning, raw material is prepared, add in induction melting furnace, be warming up to 1500-1600 DEG C, after raw material melts completely, add 15-25% industrial additive, in stove, be filled with inert gas and adopt the gas content rotated in scavenging minimizing alloy liquid.
(3) furnace refining:
In smelting furnace, add coverture carry out covering and start to stir, composition is finely tuned; Skim afterwards, add refining agent and add slag former through refining degasification simultaneously, and stir, leave standstill; Carry out again taking off Slag treatment after leaving standstill, inspection refining effect.
(4) refining is repeated:
Repeat step (3) and refining is carried out to aluminium alloy in stove, until composition proportion, in optimal components ratio range, obtains high duty alloy liquid in stove.
(5) external refining:
The high duty alloy liquid obtained is carried out degassed deoxidation, to greatest extent removal of inclusions further in the container of vacuum, inert gas or reducing atmosphere.
(6) Casting Equipment preheating:
Carry out debugging to casting machine to prepare, stalk is warming up to 180-220 DEG C and carries out preheating, and be installed on holding furnace; Mould is warming up to 250-300 DEG C simultaneously and carries out preheating, to mold cavity stenciling coating, finally carry out matched moulds.
(7) anisobaric casting:
High duty alloy liquid is injected cast insulation crucible, set anisobaric casting technological parameter: bleed pressure is 0.85-1.05Mpa simultaneously, simultaneous pressure is 0.65-0.75Mpa, rising liquid speed is 62-65mm/s, filling velocity is 58-70mm/s, pumping rate is 95-105mm/s, and crystallization boost pressure is 0.005-0.015Mpa;
Inject mould and carry out the rising liquid, fill type of anisobaric casting, pressurize, release; Pass into compressed air to mold cavity and insulation crucible simultaneously, regulating and rising hydraulic coupling is 0.12-0.15Mpa, mold filling pressure is 0.12-0.15Mpa, melt in lower work tank under the effect of pressure differential through stalk along antigravity direction filling quartz sand casting mold, fill type complete after according to setting pumping rate supercharging; Carry out pressurize when the pressure differential of lower work tank reaches 0.05Mpa, the dwell time is 4-6 minute;
High duty alloy liquid is steadily injected mould, and solidification and crystallization forms foundry goods under anisobaric effect, crystallization duration is 15-25s, and the dwell time is 75-105s, finally carries out release, takes out foundry goods.
(8) castings examination:
Carry out intensity, wearability and air-tightness to brake power-assisted vavuum pump housing by experiment to detect.
Repeatedly repeating step (3) is to drop to minimum by the H content in stove, eliminates the problem defect such as pore, shrinkage cavity, seepage often easily occurred.
Step utilizes anisobaric to cast in (7), adopts rational setting parameter and step to make by the produced product of technical scheme provided by the invention compared with the product of prior art manufacture, has stronger hot feeding capacity.Make aluminium alloy solidification and crystallization under the effect of pressure differential, through microexamination: the tissue looseness of foundry goods significantly reduces, it is finer and close to organize and mechanical property is significantly improved simultaneously.
As preferably, Ingredients Weight proportioning given in step (2) is fine aluminium: 60-65%, solid silicon: 10-15%, and all the other are chrome-nickel-molybdenum steel.
The thermal coefficient of expansion of aluminium is extremely low, and the little quality of density is light; Silicon has strong inhibition Carbide Precipitation feature in bainite transformation process, and stable and refine austenite, except can putting forward heavy alloyed quenching degree, wearability and yield strength, good impact flexibility and fracture toughness can also be kept; In chrome-nickel-molybdenum steel: chromium has outstanding anticorrosion and anti-oxidation function, and calorific intensity is high and resistance to wear; Nickel can make alloy have high tenacity, can be minimum by bringing the damage of housing to be down to due to strong collision; Molybdenum can increase the intensity of alloy, does not fall low-alloyed plasticity and toughness again simultaneously.
As preferably, industrial additive described in step (2) be containing Cr amount be 65% industrial Cr additive; Described inert gas is Ar, N
2or He; Described rotation scavenging is revolved by argon gas and is blown machine SG-III to implement.
As preferably, the composition of coverture described in step (3) and the mass percent of each composition are: CaO:10-20%, Al
2o
3: 10-25%, SiO
2: 35-45%, all the other are C; Described refining agent is nitrogen chlorine mist refining agent, inert gas refining agent or three gas refinement agent; Described slag former is converter low-carbon (LC) slag former or low-carbon (LC) submerged arc slag former.
As preferably, the optimal components ratio range in step (4) is: Al:65-70%, Si:15-20%, Cr:10.5-13%, Mo:3-4.5%, Ni:0.5-1.5%, and all the other are steel alloy element, and H<0.005%.
As preferably, the experiment in step (7) comprises collision, frictional experiment and water examination.
The present invention, compared with traditional manufacturing process, adds degassed dehydrogenation and the technological process such as proportioning, setting parameter, and the problem such as pore, shrinkage cavity defect not easily appears in the product therefore manufactured by the present invention, and properties of product are outstanding and product quality is controlled.
Accompanying drawing explanation
The microcosmic picture of the vavuum pump housing tissue that Fig. 1, use conventional method manufacture;
The microcosmic picture of the vavuum pump housing tissue that Fig. 2, use manufacturing step of the present invention and setting parameter produce;
Fig. 3, the vavuum pump housing using manufacturing step of the present invention and setting parameter to produce carry out the fracture picture after organizing tension test.
Detailed description of the invention
Below with reference to specific embodiment, technical scheme provided by the invention is described in detail, following detailed description of the invention should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1
A casting method for high strength corrosion resistant brake power-assisted vavuum pump housing, concrete steps are as follows:
(1) drying and forewarm:
The coating of melting instrument and smelting equipment remained on surface and rusty stain are removed, smelting equipment is warming up to 300 DEG C, be incubated 0.5 hour, afterwards temperature is risen to 350 DEG C by the speed of 5 DEG C/min, simultaneously at smelting equipment interior surface even application one deck protective coating, then by the speed of 40 DEG C/min, temperature is risen to 550 DEG C, be incubated 1 hour; Pending industrial additive is carried out dewatered drying by insulation simultaneously, is warming up to 80 DEG C afterwards, and is incubated 0.5 hour by the speed not higher than 3 DEG C/min.
(2) raw material melting:
According to fine aluminium: 60%, solid silicon: 10%, all the other Ingredients Weight proportionings being chrome-nickel-molybdenum steel are prepared raw material, add in induction melting furnace, be warming up to 1500 DEG C, add after raw material melts completely 15% containing Cr amount be 65% industrial Cr additive, in stove, be filled with Ar, and revolved by argon gas and blow machine SG-III and adopt and rotate scavenging and reduce gas content in alloy liquid.
(3) furnace refining:
In smelting furnace, add coverture carry out covering and start to stir, composition is finely tuned; Skim afterwards, add refining agent and add slag former through refining degasification simultaneously, and stir, leave standstill; Carry out again taking off Slag treatment after leaving standstill, inspection refining effect.Wherein the composition of coverture and the mass percent of each composition are: CaO:10%, Al
2o
3: 25%, SiO
2: 35%, all the other are C; Refining agent is nitrogen chlorine mist refining agent; Slag former is converter low-carbon (LC) slag former.
(4) refining is repeated:
Repeat step (3) and carry out refining to aluminium alloy in stove, until composition proportion is at Al:65%, Si:15%, Cr:13%, Mo:3%, Ni:0.5% in stove, all the other are steel alloy element, and in H<0.005%, obtain high duty alloy liquid.
(5) external refining:
The high duty alloy liquid obtained is carried out degassed deoxidation, to greatest extent removal of inclusions further in the container of vacuum, inert gas or reducing atmosphere.
(6) Casting Equipment preheating:
Carry out debugging to casting machine to prepare, stalk is warming up to 180 DEG C and carries out preheating, and be installed on holding furnace; Mould is warming up to 250 DEG C simultaneously and carries out preheating, to mold cavity stenciling coating, finally carry out matched moulds.
(7) anisobaric casting:
High duty alloy liquid is injected cast insulation crucible, sets anisobaric casting technological parameter: bleed pressure is 0.85Mpa, and simultaneous pressure is 0.65Mpa simultaneously, rising liquid speed is 62mm/s, filling velocity is 58mm/s, and pumping rate is 95mm/s, and crystallization boost pressure is 0.005Mpa;
Inject mould and carry out the rising liquid, fill type of anisobaric casting, pressurize, release; Pass into compressed air to mold cavity and insulation crucible simultaneously, regulating and rising hydraulic coupling is 0.12Mpa, mold filling pressure is 0.12Mpa, the melt in lower work tank under the effect of pressure differential through stalk along antigravity direction filling quartz sand casting mold, fill type complete after according to setting pumping rate supercharging; Carry out pressurize when the pressure differential of lower work tank reaches 0.05Mpa, the dwell time is 4 minutes;
High duty alloy liquid is steadily injected mould, and solidification and crystallization forms foundry goods under anisobaric effect, crystallization duration is 15s, and the dwell time is 75s, finally carries out release, takes out foundry goods.
(8) castings examination:
Carry out intensity, wearability and air-tightness by collision, frictional experiment and water examination to brake power-assisted vavuum pump housing to detect.
The tensile strength of the brake power-assisted vavuum pump housing produced by existing method is 300Mpa, and yield strength is 220Mpa, and percentage elongation is 6.5%.The tensile strength of the brake power-assisted vavuum pump housing produced by above-mentioned steps and setting parameter is 325Mpa, promotes about 8%; Yield strength is 235Mpa, promotes about 6.8%; Percentage elongation is 9%, promotes about 38%.
Embodiment 2
A casting method for high strength corrosion resistant brake power-assisted vavuum pump housing, concrete steps are as follows:
(1) drying and forewarm:
The coating of melting instrument and smelting equipment remained on surface and rusty stain are removed, smelting equipment is warming up to 325 DEG C, be incubated 0.5 hour, afterwards temperature is risen to 375 DEG C by the speed of 8 DEG C/min, simultaneously at smelting equipment interior surface even application one deck protective coating, then by the speed of 45 DEG C/min, temperature is risen to 600 DEG C, be incubated 1.2 hours; Pending industrial additive is carried out dewatered drying by insulation simultaneously, is warming up to 105 DEG C afterwards, and is incubated 0.75 hour by the speed of 4 DEG C/min.
(2) raw material melting:
According to fine aluminium: 62%, solid silicon: 13%, all the other are that the Ingredients Weight proportioning of chrome-nickel-molybdenum steel is prepared raw material, add in induction melting furnace, be warming up to 1560 DEG C, add after raw material melts completely 18% containing Cr amount be 65% industrial Cr additive, in stove, be filled with N
2, and the gas content blown in machine SG-III employing rotation scavenging minimizing alloy liquid is revolved by argon gas.
(3) furnace refining:
In smelting furnace, add coverture carry out covering and start to stir, composition is finely tuned; Skim afterwards, add refining agent and add slag former through refining degasification simultaneously, and stir, leave standstill; Carry out again taking off Slag treatment after leaving standstill, inspection refining effect.Wherein the composition of coverture and the mass percent of each composition are: CaO:15%, Al
2o
3: 10%, SiO
2: 45%, all the other are C; Refining agent is inert gas refining agent; Slag former is low-carbon (LC) submerged arc slag former.
(4) refining is repeated:
Repeat step (3) and carry out refining to aluminium alloy in stove, until composition proportion is at Al:67%, Si:16%, Cr:12.5%, Mo:4.5%, Ni:0.5% in stove, all the other are steel alloy element, and in H<0.005%, obtain high duty alloy liquid.
(5) external refining:
The high duty alloy liquid obtained is carried out degassed deoxidation, to greatest extent removal of inclusions further in the container of vacuum, inert gas or reducing atmosphere.
(6) Casting Equipment preheating:
Carry out debugging to casting machine to prepare, stalk is warming up to 200 DEG C and carries out preheating, and be installed on holding furnace; Mould is warming up to 260 DEG C simultaneously and carries out preheating, to mold cavity stenciling coating, finally carry out matched moulds.
(7) anisobaric casting:
High duty alloy liquid is injected cast insulation crucible, sets anisobaric casting technological parameter: bleed pressure is 1Mpa, and simultaneous pressure is 0.7Mpa simultaneously, rising liquid speed is 64mm/s, filling velocity is 65mm/s, and pumping rate is 100mm/s, and crystallization boost pressure is 0.01Mpa;
Inject mould and carry out the rising liquid, fill type of anisobaric casting, pressurize, release; Pass into compressed air to mold cavity and insulation crucible simultaneously, regulating and rising hydraulic coupling is 0.13Mpa, mold filling pressure is 0.14Mpa, the melt in lower work tank under the effect of pressure differential through stalk along antigravity direction filling quartz sand casting mold, fill type complete after according to setting pumping rate supercharging; Carry out pressurize when the pressure differential of lower work tank reaches 0.05Mpa, the dwell time is 5 minutes;
High duty alloy liquid is steadily injected mould, and solidification and crystallization forms foundry goods under anisobaric effect, crystallization duration is 20s, and the dwell time is 90s, finally carries out release, takes out foundry goods.
(8) castings examination:
Carry out intensity, wearability and air-tightness by collision, frictional experiment and water examination to brake power-assisted vavuum pump housing to detect.
The tensile strength of the brake power-assisted vavuum pump housing produced by existing method is 300Mpa, and yield strength is 220Mpa, and percentage elongation is 6.5%.The tensile strength of the brake power-assisted vavuum pump housing produced by above-mentioned steps and setting parameter is 346Mpa, promotes about 15%; Yield strength is 245Mpa, promotes about 11%; Percentage elongation is 9.5%, promotes and is about 46%.
Embodiment 3
A casting method for high strength corrosion resistant brake power-assisted vavuum pump housing, concrete steps are as follows:
(1) drying and forewarm:
The coating of melting instrument and smelting equipment remained on surface and rusty stain are removed, smelting equipment is warming up to 350 DEG C, be incubated 0.5 hour, afterwards the speed of temperature 10 DEG C/min is risen to 400 DEG C, simultaneously at smelting equipment interior surface even application one deck protective coating, then by the speed of 50 DEG C/min, temperature is risen to 650 DEG C, be incubated 1.5 hours; Pending industrial additive is carried out dewatered drying by insulation simultaneously, is warming up to 130 DEG C afterwards, and is incubated 1 hour by the speed of 5 DEG C/min.
(2) raw material melting:
According to fine aluminium: 65%, solid silicon: 15%, all the other Ingredients Weight proportionings being chrome-nickel-molybdenum steel are prepared raw material, add in induction melting furnace, be warming up to 1600 DEG C, add after raw material melts completely 25% containing Cr amount be 65% industrial Cr additive, in stove, be filled with He, and revolved by argon gas and blow machine SG-III and adopt and rotate scavenging and reduce gas content in alloy liquid.
(3) furnace refining:
In smelting furnace, add coverture carry out covering and start to stir, composition is finely tuned; Skim afterwards, add refining agent and add slag former through refining degasification simultaneously, and stir, leave standstill; Carry out again taking off Slag treatment after leaving standstill, inspection refining effect.Wherein the composition of coverture and the mass percent of each composition are: CaO:20%, Al
2o
3: 15%, SiO
2: 39%, all the other are C; Refining agent is three gas refinement agent; Slag former is converter low-carbon (LC) slag former.
(4) refining is repeated:
Repeat step (3) and carry out refining to aluminium alloy in stove, until composition proportion is at Al:70%, Si:15%, Cr:11%, Mo:3%, Ni:0.5% in stove, all the other are steel alloy element, and in H<0.005%, obtain high duty alloy liquid.
(5) external refining:
The high duty alloy liquid obtained is carried out degassed deoxidation, to greatest extent removal of inclusions further in the container of vacuum, inert gas or reducing atmosphere.
(6) Casting Equipment preheating:
Carry out debugging to casting machine to prepare, stalk is warming up to 220 DEG C and carries out preheating, and be installed on holding furnace; Mould is warming up to 300 DEG C simultaneously and carries out preheating, to mold cavity stenciling coating, finally carry out matched moulds.
(7) anisobaric casting:
High duty alloy liquid is injected cast insulation crucible, sets anisobaric casting technological parameter: bleed pressure is 1.05Mpa, and simultaneous pressure is 0.75Mpa simultaneously, rising liquid speed is 65mm/s, filling velocity is 70mm/s, and pumping rate is 105mm/s, and crystallization boost pressure is 0.015Mpa;
Inject mould and carry out the rising liquid, fill type of anisobaric casting, pressurize, release; Pass into compressed air to mold cavity and insulation crucible simultaneously, regulating and rising hydraulic coupling is 0.15Mpa, mold filling pressure is 0.15Mpa, the melt in lower work tank under the effect of pressure differential through stalk along antigravity direction filling quartz sand casting mold, fill type complete after according to setting pumping rate supercharging; Carry out pressurize when the pressure differential of lower work tank reaches 0.05Mpa, the dwell time is 6 minutes;
High duty alloy liquid is steadily injected mould, and solidification and crystallization forms foundry goods under anisobaric effect, crystallization duration is 25s, and the dwell time is 105s, finally carries out release, takes out foundry goods.
(8) castings examination:
Carry out intensity, wearability and air-tightness by collision, frictional experiment and water examination to brake power-assisted vavuum pump housing to detect.
The tensile strength of the brake power-assisted vavuum pump housing produced by existing method is 300Mpa, and yield strength is 220Mpa, and percentage elongation is 6.5%.The tensile strength of the brake power-assisted vavuum pump housing produced by above-mentioned steps and setting parameter is 342Mpa, promotes and is about 14%; Yield strength is 240Mpa, promotes and is about 9.1%; Percentage elongation is 9.2%, promotes and is about 41%.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned embodiment, also comprises the technical scheme be made up of above technical characteristic.
Claims (6)
1. a casting method for high strength corrosion resistant brake power-assisted vavuum pump housing, is characterized in that:
Concrete steps are as follows:
(1) drying and forewarm:
The coating of melting instrument and smelting equipment remained on surface and rusty stain are removed, smelting equipment is warming up to 300-350 DEG C, be incubated 0.5 hour, afterwards temperature is risen to 350-400 DEG C by the speed being not more than 10 DEG C/min, simultaneously at smelting equipment interior surface even application one deck protective coating, then by the speed being not less than 40 DEG C/min, temperature is risen to 550-650 DEG C, insulation 1-1.5 hour; Pending industrial additive is carried out dewatered drying by insulation simultaneously, afterwards by not being warming up to 80-130 DEG C higher than the speed of 5 DEG C/min, and is incubated 0.5-1 hour;
(2) raw material melting:
According to given Ingredients Weight proportioning, raw material is prepared, add in induction melting furnace, be warming up to 1500-1600 DEG C, after raw material melts completely, add 15-25% industrial additive, in stove, be filled with inert gas and adopt the gas content rotated in scavenging minimizing alloy liquid;
(3) furnace refining:
In smelting furnace, add coverture carry out covering and start to stir, composition is finely tuned; Skim afterwards, add refining agent and add slag former through refining degasification simultaneously, and stir, leave standstill; Carry out again taking off Slag treatment after leaving standstill, inspection refining effect;
(4) refining is repeated:
Repeat step (3) and refining is carried out to aluminium alloy in stove, until composition proportion, in optimal components ratio range, obtains high duty alloy liquid in stove;
(5) external refining:
The high duty alloy liquid obtained is carried out degassed deoxidation, to greatest extent removal of inclusions further in the container of vacuum, inert gas or reducing atmosphere;
(6) Casting Equipment preheating:
Carry out debugging to casting machine to prepare, stalk is warming up to 180-220 DEG C and carries out preheating, and be installed on holding furnace; Mould is warming up to 250-300 DEG C simultaneously and carries out preheating, to mold cavity stenciling coating, finally carry out matched moulds;
(7) anisobaric casting:
High duty alloy liquid is injected cast insulation crucible, set anisobaric casting technological parameter: bleed pressure is 0.85-1.05Mpa simultaneously, simultaneous pressure is 0.65-0.75Mpa, rising liquid speed is 62-65mm/s, filling velocity is 58-70mm/s, pumping rate is 95-105mm/s, and crystallization boost pressure is 0.005-0.015Mpa;
Inject mould and carry out the rising liquid, fill type of anisobaric casting, pressurize, release; Pass into compressed air to mold cavity and insulation crucible simultaneously, regulating and rising hydraulic coupling is 0.12-0.15Mpa, mold filling pressure is 0.12-0.15Mpa, melt in lower work tank under the effect of pressure differential through stalk along antigravity direction filling quartz sand casting mold, fill type complete after according to setting pumping rate supercharging; Carry out pressurize when the pressure differential of lower work tank reaches 0.05Mpa, the dwell time is 4-6 minute;
High duty alloy liquid is steadily injected mould, and solidification and crystallization forms foundry goods under anisobaric effect, crystallization duration is 15-25s, and the dwell time is 75-105s, finally carries out release, takes out foundry goods;
(8) castings examination:
Carry out intensity, wearability and air-tightness to brake power-assisted vavuum pump housing by experiment to detect.
2. the manufacture method of a kind of high strength corrosion resistant brake power-assisted vavuum pump housing according to claim 1, it is characterized in that: Ingredients Weight proportioning given in described step (2) is fine aluminium: 60-65%, solid silicon: 10-15%, all the other are chrome-nickel-molybdenum steel.
3. the casting method of a kind of high strength corrosion resistant brake power-assisted vavuum pump housing according to claim 1, is characterized in that: industrial additive described in step (2) is contain the industrial Cr additive that Cr amount is 65%; Described inert gas is Ar, N
2or He; Described rotation scavenging is revolved by argon gas and is blown machine SG-III to implement.
4. the casting method of a kind of high strength corrosion resistant brake power-assisted vavuum pump housing according to claim 1, is characterized in that: the composition of coverture described in step (3) and the mass percent of each composition are: CaO:10-20%, Al
2o
3: 10-25%, SiO
2: 35-45%, all the other are C; Described refining agent is nitrogen chlorine mist refining agent, inert gas refining agent or three gas refinement agent; Described slag former is converter low-carbon (LC) slag former or low-carbon (LC) submerged arc slag former.
5. the casting method of a kind of high strength corrosion resistant brake power-assisted vavuum pump housing according to claim 1, it is characterized in that: the optimal components ratio range in described step (4) is: Al:65-70%, Si:15-20%, Cr:10.5-13%, Mo:3-4.5%, Ni:0.5-1.5%, all the other are steel alloy element, and H<0.005%.
6. the casting method of a kind of high strength corrosion resistant brake power-assisted vavuum pump housing according to claim 1, is characterized in that: the experiment in described step (8) comprises collision, frictional experiment and water examination.
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Cited By (3)
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| CN105522134A (en) * | 2016-02-17 | 2016-04-27 | 苏州浦石精工科技有限公司 | Mold-casting molding method of automobile generator end cover |
| CN108393437A (en) * | 2018-02-09 | 2018-08-14 | 江苏恒高精密成型科技有限公司 | A kind of production technology of cast housing |
| CN109622920A (en) * | 2018-11-30 | 2019-04-16 | 江苏文灿压铸有限公司 | The pouring technology of low-pressure casting gas fuel valve remote controllers gear housing |
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| CN101439396A (en) * | 2008-12-10 | 2009-05-27 | 中国兵器工业第五二研究所 | Counter-pressure casting process for casting parts of door cover |
| CN101844218A (en) * | 2009-03-28 | 2010-09-29 | 王宏波 | Low pressure casting process for aluminum alloy cylinder part |
| CN101569924A (en) * | 2009-06-10 | 2009-11-04 | 哈尔滨工业大学 | High-counter-pressure casting method for high-tensile and high-density aluminum silicon alloy |
| CN102873301A (en) * | 2012-10-22 | 2013-01-16 | 中国船舶重工集团公司第七0七研究所 | Counter-pressure casting process for ZL424 aluminum alloy castings |
| CN102965556A (en) * | 2012-11-20 | 2013-03-13 | 南通大学 | Multi-element Mg-Zn-Al based magnesium alloy and preparation method thereof |
| CN104607613A (en) * | 2013-11-05 | 2015-05-13 | 青岛齐力铸钢有限公司 | Counter-pressure casting technology of cabin door cover casting |
| CN103725934A (en) * | 2013-12-20 | 2014-04-16 | 珠海嵘泰有色金属铸造有限公司 | Preparation method of casting aluminum alloy automobile engine by ultra-low speed laminar flow |
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| CN105522134A (en) * | 2016-02-17 | 2016-04-27 | 苏州浦石精工科技有限公司 | Mold-casting molding method of automobile generator end cover |
| CN108393437A (en) * | 2018-02-09 | 2018-08-14 | 江苏恒高精密成型科技有限公司 | A kind of production technology of cast housing |
| CN109622920A (en) * | 2018-11-30 | 2019-04-16 | 江苏文灿压铸有限公司 | The pouring technology of low-pressure casting gas fuel valve remote controllers gear housing |
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