CN100493778C - Sand mould casting method for large-scale high-temperature alloy cast - Google Patents
Sand mould casting method for large-scale high-temperature alloy cast Download PDFInfo
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- CN100493778C CN100493778C CNB2006100523762A CN200610052376A CN100493778C CN 100493778 C CN100493778 C CN 100493778C CN B2006100523762 A CNB2006100523762 A CN B2006100523762A CN 200610052376 A CN200610052376 A CN 200610052376A CN 100493778 C CN100493778 C CN 100493778C
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Abstract
The invention discloses a casting method of a large high temperature alloy casting. The present home high temperature alloy castings have problems that the casting method still stays in precision casting , the weight of the largest casting does not exceed 40kg, and the using temperature of the casting is beneath 800 DEG C. The procedures of the invention are as following: firstly, elements whose quantity will be increased when re-melting and elements that will be burnt are combined with chemical components of the high temperature alloy to be pre-formulated so that master batch of the high temperature alloy can be obtained; and then the master batch will be re-melted in a frequency current furnace with high melting speed so as to make the master batch become molten steel; then the molten steel will be slag formed and cast in high temperature so that a large casting can be obtained; then the riser of the casting will be wire-cut; finally, the casting will undergo high temperature solid melting treatment. The high temperature alloy casting cast by the invention weighs 40kg to 5 tons, and can work for a long time beneath 900 DEG C.
Description
Technical field
The present invention relates to the manufacture method of alloy-steel casting, specifically a kind of casting method of large-sized high-temperature alloy foundry goods.
Background technology
High temperature alloy GH3044 is the Ni-based oxidation-resistant alloy of solution strengthening, have high plasticity and medium heat resistance below 900 ℃, and have good non-oxidizability and good punching press, a welding technological properties, suitable aero-engine main chamber that is manufactured on long-term work below 900 ℃ and after-burner parts and heat screen, guide vane etc.Because its tungstenic amount is 13～16%, the difficulty of casting is very big, and China only makes bar and sheet material always and uses, and has seriously restricted the development of oil, chemical industry, station boiler, military assembly industry, Aeronautics and Astronautics and the deep-sea machinery of China.Produce large aircraft engine and some other machinery, at first must cast out the heavy castings of high temperature alloy GH3044.
Kind surplus the casting method of at present domestic high temperature alloy foundry goods (tungstenic amount≤9%) has 40 all also rests in the hot investment casting, and maximum casting weight is no more than 40kg, and the serviceability temperature of foundry goods is below 800 ℃.Its step is as follows: do a metal die earlier, wax is compressed into metal die, form a wax-pattern; Be sprayed on the wax-pattern surface with the silicon melten gel then under constant temperature, in glue outside sandblast, repeat to spray glue, sandblast 6 times again, the time generally needs about 10 days; Then steam dewaxing obtains arenaceous shell; Under 800 ℃ of high temperature furnaces, arenaceous shell is carried out roasting, pour in the arenaceous shell with molten steel afterwards, after the cooling arenaceous shell is broken naturally, form foundry goods; Pickling, the quick-fried processing of alkali are carried out to foundry goods in the back again.There is following shortcoming in said method: because metal die can't be done greatly, because big metal die must cause wax-pattern and arenaceous shell also big, thereby wax-pattern is broken easily, and arenaceous shell does not advance roasting in the high temperature furnace, so can not cast out the big foundry goods of weight more than 40kg; Molten steel and arenaceous shell cool off airtight together naturally, and cool time is long, and it is big that equiax crystal becomes, and make the crystal grain of foundry goods loose, have reduced the intensity of foundry goods.
Summary of the invention
Technical problem to be solved by this invention is to overcome the defective that above-mentioned prior art exists, and a kind of sand casting method of large-sized high-temperature alloy foundry goods is provided, and casts out the high temperature resistant big foundry goods of weight more than 40kg.
For this reason, the present invention adopts following technical scheme: the sand casting method of large-sized high-temperature alloy foundry goods, its step is as follows: earlier in vacuum drying oven the heavy element of wanting increment when molten with want the element of scaling loss to fill a prescription in advance in conjunction with the chemical composition of high temperature alloy, obtain the masterbatch of high temperature alloy; Heavy molten to the cycle stove of high speed melting then, become molten steel; At high temperature carry out the slag making cast afterwards, get heavy castings; Rising head to foundry goods carries out the line cutting; At last foundry goods being carried out high temperature solid solution handles.In heavy molten process, want carburetting, sulphur, P elements, want scaling loss aluminium, titanium elements, so the present invention fills a prescription in vacuum drying oven in advance in advance, situation when consideration is heavily molten, on the basis of the chemical composition of high temperature alloy GH3044, reduce carbon, sulphur, phosphorus element content, increase aluminium, titanium elements content (deciding the recruitment and the reduction of element according to the speed of melting of cycle stove), form the masterbatch of high temperature alloy, after overweight molten step, the chemical composition of high temperature alloy GH3044 is not changed like this.The present invention can cast out 40kg to 5 ton high temperature alloy foundry goods.
As further technical scheme, the process during the slag making cast is as follows: under 1590～1600 ℃, surround the wooden model of making in advance with self-setting silicate process, then take out wooden model, pour in the self-setting silicate process with carbon dioxide, form a sand mold; Sand mold advances the drying room oven dry, steams moisture content; Below 15%, cast place air is dried heating in humidity, in casting process molten steel is carried out argon shield, molten steel pours into and gets foundry goods in the sand mold.The present invention will pour into a mould under anhydrous and oxygen-free state (simulation vacuum condition).
As further technical scheme, the temperature when high temperature solid solution is handled is 1200 ℃, relieves the stresses, and makes the refinement of foundry goods texture, and intensity everywhere is even.
The present invention has following beneficial effect: the high temperature alloy casting quality is at 40kg to 5 ton; The crystal grain of foundry goods is thin, intensity is high, and is high temperature resistant, can be in long-term work below 900 ℃; Casting Equipment is simple, and the production cost of foundry goods is low.
The present invention is further illustrated below in conjunction with Figure of description and embodiment.
The specific embodiment
The chemical composition of high temperature alloy GH3044 (mass percent %) sees the following form
Want carbon, sulphur, the P elements of increment and want the aluminium of scaling loss, titanium elements to fill a prescription in advance when handle is heavily molten in vacuum drying oven earlier, obtain the masterbatch of high temperature alloy in conjunction with the chemical composition (seeing the above table) of high temperature alloy GH3044; Heavy molten to the cycle stove of high speed melting then, become molten steel; Carry out the slag making cast afterwards: under 1550～1650 ℃, surround the wooden model of making in advance with self-setting silicate process, then take out wooden model, pour in the self-setting silicate process, form a sand mold with carbon dioxide, sand mold advances the drying room oven dry, steam moisture content, below 15%, cast place air is dried heating in humidity, in casting process molten steel is carried out argon shield, molten steel pours into and gets heavy castings in the sand mold; Rising head to foundry goods carries out the line cutting; At last foundry goods being carried out 1150～1250 ℃ of following high temperature solid solutions handles.
Protection scope of the present invention is not limited to the foregoing description.
Claims (3)
1, the sand casting method of large-sized high-temperature alloy foundry goods, its step is as follows: earlier in vacuum drying oven the heavy element of wanting increment when molten with want the element of scaling loss to fill a prescription in advance in conjunction with the chemical composition of high temperature alloy, obtain the masterbatch of high temperature alloy; Heavy molten to the cycle stove of high speed melting then, become molten steel; Carry out the slag making cast afterwards: under 1550～1650 ℃, surround the wooden model of making in advance with self-setting silicate process, then take out wooden model, pour in the self-setting silicate process with carbon dioxide, form a sand mold, sand mold advances drying room oven dry, steam moisture content must pour into a mould use sand mold, molten steel to pour in the sand mold must heavy castings; Rising head to foundry goods carries out the line cutting; At last foundry goods being carried out high temperature solid solution handles.
2, the sand casting method of large-sized high-temperature alloy foundry goods according to claim 1 when it is characterized in that pouring into a mould, is dried heating to cast place air in humidity below 15%, in casting process molten steel is carried out argon shield
3, the sand casting method of large-sized high-temperature alloy foundry goods according to claim 1 and 2 is characterized in that the temperature when high temperature solid solution is handled is 1150～1250 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100523762A CN100493778C (en) | 2006-07-10 | 2006-07-10 | Sand mould casting method for large-scale high-temperature alloy cast |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100523762A CN100493778C (en) | 2006-07-10 | 2006-07-10 | Sand mould casting method for large-scale high-temperature alloy cast |
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| CN101104201A CN101104201A (en) | 2008-01-16 |
| CN100493778C true CN100493778C (en) | 2009-06-03 |
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| CNB2006100523762A Active CN100493778C (en) | 2006-07-10 | 2006-07-10 | Sand mould casting method for large-scale high-temperature alloy cast |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921946B (en) * | 2010-08-12 | 2012-01-11 | 荆州环宇汽车零部件有限公司 | Method for producing high-grade nodular cast iron crank shaft by normalizing casting waste heat |
| CN102873309B (en) * | 2012-09-15 | 2015-05-20 | 浙江灿根机械制造有限公司 | Casting process for large-scale copper alloy sand mould |
| CN104801667B (en) * | 2013-12-31 | 2017-05-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for preventing generation of casting crack of high temperature alloy mold |
| CN106224667B (en) * | 2016-07-29 | 2018-07-17 | 盐城丰工机械有限公司 | A kind of quick firm flange of connection |
| CN106247048B (en) * | 2016-07-29 | 2018-08-31 | 盐城丰工机械有限公司 | A kind of efficient sealed flange |
| CN114790505A (en) * | 2022-04-14 | 2022-07-26 | 成都航利航空科技有限责任公司 | Solution heat treatment method for GH3044 bolt |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827791A (en) * | 1997-09-12 | 1998-10-27 | Titanium Metals Corporation | Facecoat ceramic slurry and methods for use thereof in mold fabrication and casting |
| CN1343798A (en) * | 2000-09-16 | 2002-04-10 | 江苏江河集团电力工程公司 | Centrifugal casting technology for manufacturing cold drawn seamless pipe of ultralow-carbon dual-phase stainless steel |
| CN1360078A (en) * | 2001-12-04 | 2002-07-24 | 上海交通大学 | Solid solution reinforced cast Mg alloy with high strength and low thermocracking tendency |
| CN1772942A (en) * | 2005-09-12 | 2006-05-17 | 钢铁研究总院 | Nickel-saving RE-containing austenitic stainless steel and its prepn |
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2006
- 2006-07-10 CN CNB2006100523762A patent/CN100493778C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5827791A (en) * | 1997-09-12 | 1998-10-27 | Titanium Metals Corporation | Facecoat ceramic slurry and methods for use thereof in mold fabrication and casting |
| CN1343798A (en) * | 2000-09-16 | 2002-04-10 | 江苏江河集团电力工程公司 | Centrifugal casting technology for manufacturing cold drawn seamless pipe of ultralow-carbon dual-phase stainless steel |
| CN1360078A (en) * | 2001-12-04 | 2002-07-24 | 上海交通大学 | Solid solution reinforced cast Mg alloy with high strength and low thermocracking tendency |
| CN1772942A (en) * | 2005-09-12 | 2006-05-17 | 钢铁研究总院 | Nickel-saving RE-containing austenitic stainless steel and its prepn |
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| CN101104201A (en) | 2008-01-16 |
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