CN104874744A - Casting method of crank case - Google Patents
Casting method of crank case Download PDFInfo
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- CN104874744A CN104874744A CN201510258671.2A CN201510258671A CN104874744A CN 104874744 A CN104874744 A CN 104874744A CN 201510258671 A CN201510258671 A CN 201510258671A CN 104874744 A CN104874744 A CN 104874744A
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- crankcase
- molten metal
- casting method
- casting
- mould
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a casting method of a crank case. The crank case is produced from the following chemical components in percentage by weight: 2.6%-3.2% of C, 1.6%-2.2% of Si, 0.4%-1% of Mn, 0.06%-0.08% of S, 0.5%-1% of Cr, 0.8%-1% of Cu, 0.03% of Sn and the balance of Fe. The casting method comprises the operation steps: A, heating and melting the raw materials into a metal liquid at the melting temperature of 1480 DEG C-1500 DEG C; B, putting the metal liquid into a ladle when the metal liquid reaches 1420 DEG C-1450 DEG C, adding a nucleating agent, nucleating the metal liquid so as to obtain a casting liquid; and C, casting the casting liquid to a sand mold from a sprue at the casting temperature of 1320 DEG C-1330 DEG C, and condensing so as to obtain the crank case. Compared with the prior art, the problem of shrinkage porosity due to uneven cooling speed at the thickness junction part when the existing crank case is cast can be solved.
Description
Technical field
The present invention relates to casting technology field, especially a kind of casting method for large-scale compressor crankcase.
Background technology
Large-scale compressor crankcase main spindle box is one of vitals of compressor, and this casting weight is comparatively large, and the thickness of the wall thickness of foundry goods differs about 3 times with thinnest part; Because cross position cooling velocity of foundry goods thickness is uneven, reinforcement and the junction that is thick, thin-walled of crankcase very easily produce shrinkage porosite, and processed finished products is opened in use for some time and cracked, and cause the even serious leakage of oil of oil impregnate.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of casting method of crankcase, to cross the uneven problem easily producing shrinkage porosite of position cooling velocity with the thickness that is cast in solving existing crankcase.
The technical scheme that technical solution problem of the present invention adopts is: a kind of casting method of crankcase, and the chemical composition of crankcase with percentage by weight is: C:2.6% ~ 3.2%; Si:1.6 ~ 2.2%; Mn:0.4% ~ 1%; S:0.06% ~ 0.08%; Cr:0.5% ~ 1%; Cu:0.8% ~ 1.0%; Sn:0.03%; All the other are Fe;
Comprise following operating procedure:
A, by above-mentioned raw materials heating be smelted into molten metal, smelting temperature is 1480 DEG C ~ 1500 DEG C, pours in ladle after skimming, then puts into holding furnace inside holding;
B, treat that molten metal reaches 1420 DEG C ~ 1450 DEG C, molten metal is put into ladle, adds inovulant 75Si and inoculation is done to molten metal, after inoculation, scratch clean slag rapidly, must night be poured into a mould;
C, pour into a mould described potting syrup by cast gate to sand mold, pouring temperature is 1320 DEG C ~ 1330 DEG C, namely obtains this main spindle box after solidifying.
In the casting method technical scheme of above-mentioned crankcase, technical scheme can also be more specifically: chill is placed at the thickness of the described crankcase mould in sand mold described in the step C position that crosses.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect: owing to carrying out assembly again to the chemical composition of crankcase, and the thickness of crankcase mould cross position place chill, make foundry goods each position cooling velocity basically identical, eliminate and produce the possibility of shrinkage porosite at the thickness position that crosses, improve casting quality.
Detailed description of the invention
Below in conjunction with example, the invention will be further described:
Embodiment 1:
A casting method for crankcase, the chemical composition of crankcase with percentage by weight is: C:2.6%; Si:1.6; Mn:0.4%; S:0.06%; Cr:0.5%; Cu:0.8%; Sn:0.03%; All the other are Fe;
Comprise following operating procedure:
A, by above-mentioned raw materials heating be smelted into molten metal, smelting temperature is 1480 DEG C ~ 1500 DEG C, pours in ladle after skimming, then puts into holding furnace inside holding;
B, treat that molten metal reaches 1420 DEG C ~ 1450 DEG C, molten metal is put into ladle, adds inovulant 75Si and inoculation is done to molten metal, after inoculation, scratch clean slag rapidly, must night be poured into a mould;
C, pour into a mould potting syrup by cast gate to sand mold, pouring temperature is 1320 DEG C ~ 1330 DEG C, namely obtains this main spindle box after solidifying; Chill is placed at the thickness of the crankcase mould in the sand mold position that crosses.
Embodiment 2:
A casting method for crankcase, the chemical composition of crankcase with percentage by weight is: C:3.2%; Si:2.2%; Mn:1%; S:0.08%; Cr:1%; Cu:1.0%; Sn:0.03%; All the other are Fe;
Comprise following operating procedure:
A, by above-mentioned raw materials heating be smelted into molten metal, smelting temperature is 1480 DEG C ~ 1500 DEG C, pours in ladle after skimming, then puts into holding furnace inside holding;
B, treat that molten metal reaches 1420 DEG C ~ 1450 DEG C, molten metal is put into ladle, adds inovulant 75Si and inoculation is done to molten metal, after inoculation, scratch clean slag rapidly, must night be poured into a mould;
C, pour into a mould potting syrup by cast gate to sand mold, pouring temperature is 1320 DEG C ~ 1330 DEG C, namely obtains this main spindle box after solidifying; Chill is placed at the thickness of the crankcase mould in the sand mold position that crosses.
Claims (2)
1. a casting method for crankcase, is characterized in that the chemical composition of crankcase with percentage by weight is: C:2.6% ~ 3.2%; Si:1.6 ~ 2.2%; Mn:0.4% ~ 1%; S:0.06% ~ 0.08%; Cr:0.5% ~ 1%; Cu:0.8% ~ 1.0%; Sn:0.03%; All the other are Fe;
Comprise following operating procedure:
A, by above-mentioned raw materials heating be smelted into molten metal, smelting temperature is 1480 DEG C ~ 1500 DEG C, pours in ladle after skimming, then puts into holding furnace inside holding;
B, treat that molten metal reaches 1420 DEG C ~ 1450 DEG C, molten metal is put into ladle, adds inovulant 75Si and inoculation is done to molten metal, after inoculation, scratch clean slag rapidly, must night be poured into a mould;
C, pour into a mould described potting syrup by cast gate to sand mold, pouring temperature is 1320 DEG C ~ 1330 DEG C, namely obtains this main spindle box after solidifying.
2. the casting method of crankcase according to claim 1, is characterized in that: chill is placed at the thickness of the described crankcase mould in sand mold described in the step C position that crosses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258671.2A CN104874744A (en) | 2015-05-20 | 2015-05-20 | Casting method of crank case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258671.2A CN104874744A (en) | 2015-05-20 | 2015-05-20 | Casting method of crank case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104874744A true CN104874744A (en) | 2015-09-02 |
Family
ID=53942568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510258671.2A Pending CN104874744A (en) | 2015-05-20 | 2015-05-20 | Casting method of crank case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104874744A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623806A (en) * | 2017-01-19 | 2017-05-10 | 溧阳市万盛铸造有限公司 | Casting foundry process |
| CN107552726A (en) * | 2017-09-27 | 2018-01-09 | 安徽海立精密铸造有限公司 | A kind of new type crank casting technique |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787403A (en) * | 2010-01-29 | 2010-07-28 | 河北工业大学 | Short process production technique for preparing casting of wind power generation equipment |
| CN101905313A (en) * | 2010-07-29 | 2010-12-08 | 苏州市海威特铸造厂 | Method for casting main spindle box |
| JP2012213787A (en) * | 2011-03-31 | 2012-11-08 | Kubota Corp | Casting method |
| CN102896280A (en) * | 2012-10-09 | 2013-01-30 | 安徽安凯福田曙光车桥有限公司 | Casting method of automobile axle housing |
-
2015
- 2015-05-20 CN CN201510258671.2A patent/CN104874744A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787403A (en) * | 2010-01-29 | 2010-07-28 | 河北工业大学 | Short process production technique for preparing casting of wind power generation equipment |
| CN101905313A (en) * | 2010-07-29 | 2010-12-08 | 苏州市海威特铸造厂 | Method for casting main spindle box |
| JP2012213787A (en) * | 2011-03-31 | 2012-11-08 | Kubota Corp | Casting method |
| CN102896280A (en) * | 2012-10-09 | 2013-01-30 | 安徽安凯福田曙光车桥有限公司 | Casting method of automobile axle housing |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106623806A (en) * | 2017-01-19 | 2017-05-10 | 溧阳市万盛铸造有限公司 | Casting foundry process |
| CN106623806B (en) * | 2017-01-19 | 2018-05-22 | 溧阳市万盛铸造有限公司 | A kind of cast casting technique |
| CN107552726A (en) * | 2017-09-27 | 2018-01-09 | 安徽海立精密铸造有限公司 | A kind of new type crank casting technique |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |