CN115491680A - Method for preventing stainless steel pipe in aluminum alloy casting from rusting - Google Patents
Method for preventing stainless steel pipe in aluminum alloy casting from rusting Download PDFInfo
- Publication number
- CN115491680A CN115491680A CN202211196597.2A CN202211196597A CN115491680A CN 115491680 A CN115491680 A CN 115491680A CN 202211196597 A CN202211196597 A CN 202211196597A CN 115491680 A CN115491680 A CN 115491680A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- steel pipe
- aluminum alloy
- preventing
- rusting
- 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
- 239000010935 stainless steel Substances 0.000 title claims abstract description 78
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 78
- 238000005266 casting Methods 0.000 title claims abstract description 38
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011651 chromium Substances 0.000 claims abstract description 16
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000007800 oxidant agent Substances 0.000 claims abstract description 14
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 10
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 19
- 229910052786 argon Inorganic materials 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 abstract description 3
- 230000003064 anti-oxidating effect Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F15/00—Other methods of preventing corrosion or incrustation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
- B22D19/045—Casting in, on, or around objects which form part of the product for joining parts for joining tubes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention discloses a method for preventing a stainless steel pipe in an aluminum alloy casting from rusting, which comprises the following steps: a method for preventing the rust of a chromium-containing stainless steel pipe in an aluminum alloy casting. The carbon powder is used as an oxidant to protect chromium elements in the metallographic structure of the stainless steel pipe from being consumed by high-temperature oxidation, so that the inner diameter surface of the stainless steel pipe cannot generate rusty spots, and the problem that the rusty spots can influence the subsequent oil passing and ventilation quality of the inner diameter surface of the stainless steel pipe is solved.
Description
Technical Field
The invention relates to a method for preventing stainless steel pipes in aluminum alloy castings from rusting, and belongs to the technical field of casting production.
Background
In the aluminum alloy casting, in order to use oil, air and the like, a stainless steel pipe needs to be embedded in the aluminum alloy casting, the stainless steel pipe needs to be embedded in a wax mold of the aluminum alloy casting, the stainless steel pipe needs to be subjected to shell roasting (the roasting temperature is 950 ℃ and the roasting time is more than 2 hours) along with a shell made of the wax mold in the later stage, the shell is preheated (according to the actual casting parameters, generally 500 ℃, the preheating time is more than 2 hours), alloy liquid is poured (the temperature of metal liquid is 720 ℃), the casting is subjected to heat treatment (according to the actual heat treatment parameters of the casting, the heat treatment temperature is generally more than 500 ℃, the heat treatment time is generally 2 hours to 20 hours) and other processes, and in the four high-temperature processes of shell roasting, shell preheating, alloy liquid pouring and casting heat treatment, the highest heating temperature is 950 ℃, the total heating time is 6 hours to 20 hours, so that the stainless steel pipe 3 is tightly attached to the inner diameter surface and the outer diameter of the aluminum alloy casting 2 and is oxidized to generate rust spots 1, which is shown in figure 1. Although the rust points can be treated by polishing the inner diameter surface and the outer diameter surface of the stainless steel pipe, internal antioxidant elements of the stainless steel pipe are completely oxidized when the stainless steel pipe is in a high-temperature environment for a long time, the rust points can regenerate after being placed for a period of time after being treated by polishing, the outer diameter surface of the stainless steel pipe can be coated with an anti-oxidation coating after being polished to prevent the rust points from regenerating, and the subsequent oil and ventilation quality of the inner diameter surface of the stainless steel pipe can be affected by the rust points.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for preventing a stainless steel pipe in an aluminum alloy casting from rusting.
The invention is realized by the following technical scheme.
The invention provides a method for preventing a stainless steel pipe in an aluminum alloy casting from rusting, which comprises the following steps: a method for preventing the rust of a chromium-containing stainless steel pipe in an aluminum alloy casting.
The method specifically comprises the steps of filling instead of an oxidant, sealing and coating to make the shell in sequence.
The step of filling the substitute oxidizing agent comprises the following steps: carbon powder is filled in the stainless steel pipe to serve as an oxidant, and under the environment of high temperature and containing water vapor, the carbon powder replaces an anti-oxidation chromium element in the stainless steel pipe to react first, so that the chromium element in the metallographic structure of the stainless steel pipe is protected from being consumed by high-temperature oxidation, and the inner diameter surface of the stainless steel pipe cannot generate rusty spots.
The oxidant is carbon powder.
And in the sealing step, two stainless steel pipe argon arc welding plugs are welded at two ends of the stainless steel pipe in a sealing mode through argon arc welding, so that the inside of the stainless steel pipe is in a sealing state.
The coating shell making step is as follows: coating a wax mould of an aluminum alloy casting embedded with a stainless steel pipe to prepare a shell, then sequentially roasting the shell, preheating the shell, pouring alloy liquid, carrying out casting heat treatment, and removing carbon powder and an argon arc welding plug of the stainless steel pipe.
Before the step of filling the substitute oxidant, the method also comprises the step of pre-embedding the stainless steel pipe.
The stainless steel pipe pre-embedding steps are as follows: and embedding the chromium-containing stainless steel pipe into a wax mold of the aluminum alloy casting.
The invention has the beneficial effects that: the carbon powder is used as an oxidant to protect chromium elements in the metallographic structure of the stainless steel pipe from being consumed by high-temperature oxidation, so that the inner diameter surface of the stainless steel pipe cannot generate rusty spots, and the problem that the rusty spots can influence the subsequent oil passing and ventilation quality of the inner diameter surface of the stainless steel pipe is solved.
Drawings
FIG. 1 is a schematic sectional view showing stainless steel tubes having rusted spots on both the inner and outer diameter surfaces thereof;
FIG. 2 is a schematic sectional view showing that rust is formed only on the outer diameter surface of a stainless steel pipe after the rust-proofing treatment according to the present invention;
in the figure: 1-rust point; 2-aluminum alloy castings; 3-stainless steel tube; 4-argon arc welding of a stainless steel pipe plug; 5-carbon powder.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 2.
The application provides a method for preventing stainless steel pipes in aluminum alloy castings from rusting, in particular a method for preventing chromium-containing stainless steel pipes in aluminum alloy castings from rusting, which comprises the following steps:
step one, embedding a stainless steel pipe: and embedding the chromium-containing stainless steel pipe 3 into a wax mold of the aluminum alloy casting 2.
Step two, filling substitute oxidants: filling carbon powder 5 serving as an oxidant into the stainless steel pipe 3, wherein the carbon powder replaces an anti-oxidation chromium (Cr) element in the stainless steel pipe 3 to react under the environment of high temperature and containing water vapor so as to protect the chromium (Cr) element in the metallographic structure of the stainless steel pipe 3 from being consumed by high-temperature oxidation, so that the inner diameter surface of the stainless steel pipe cannot generate rust points 1, and the problem that the rust points influence the oil and air permeability quality of the inner diameter surface of the stainless steel pipe subsequently is solved; since chromium (Cr) element, which is a main element for preventing stainless steel from rusting, is contained in stainless steel, it is easily oxidized at a temperature of more than 650 c to cause loss of Cr element in the stainless steel material.
Step three, sealing: two stainless steel pipe argon arc welding plugs 4 are welded at two ends of the stainless steel pipe 3 in a sealing mode through argon arc welding, so that the inside of the stainless steel pipe 3 is in a sealing state, and external water vapor is prevented from being supplemented into the inside of the stainless steel pipe 3 and contacting with carbon powder 5.
Step four, coating shell making: and (3) coating a wax mould of the aluminum alloy casting 2 embedded with the stainless steel pipe 3 to prepare a shell, then sequentially roasting the shell, preheating the shell, pouring alloy liquid and carrying out casting heat treatment, and then removing carbon powder 5 and the argon arc welding plug 4 of the stainless steel pipe.
Claims (8)
1. A method for preventing stainless steel pipes in aluminum alloy castings from rusting is characterized by comprising the following steps: a method for preventing the rust of a chromium-containing stainless steel pipe in an aluminum alloy casting.
2. A method of preventing rusting of a stainless steel tube in an aluminum alloy casting according to claim 1, wherein: the method specifically comprises the steps of filling instead of an oxidant, sealing and coating to make the shell in sequence.
3. A method of preventing rusting of stainless steel tubes in aluminum alloy castings according to claim 2, wherein said step of filling with a substitute oxidant is: carbon powder (5) is filled in the stainless steel tube (3) as an oxidant, and under the environment of high temperature and containing water vapor, the carbon powder replaces the chromium element in the stainless steel tube (3) for oxidation to react first, so as to protect the chromium element in the metallographic structure of the stainless steel tube (3) from being consumed by high temperature oxidation, and the inner diameter surface of the stainless steel tube cannot generate rust spots (1).
4. A method for preventing rust of stainless steel tubes in aluminum alloy castings according to claim 3, wherein the oxidizing agent is carbon powder (5).
5. The method for preventing the stainless steel pipe in the aluminum alloy casting from rusting according to claim 2, wherein the sealing step is to hermetically weld two stainless steel pipe argon arc welding plugs (4) at two ends of the stainless steel pipe (3) through argon arc welding so that the inside of the stainless steel pipe (3) is in a sealed state.
6. A method of preventing rusting of a stainless steel tube in an aluminum alloy casting according to claim 2 wherein said coating shell making step comprises: coating a wax mould of the aluminum alloy casting (2) embedded with the stainless steel pipe (3) to prepare a shell, then sequentially carrying out shell roasting, shell preheating, alloy liquid pouring and casting heat treatment, and then removing carbon powder (5) and an argon arc welding plug (4) of the stainless steel pipe.
7. The method for preventing rust of stainless steel tubes in aluminum alloy castings according to claim 2, further comprising a pre-burying step of the stainless steel tubes prior to said filling of the substitute oxidizing agent step.
8. The method for preventing the stainless steel pipe in the aluminum alloy casting from rusting according to claim 7, wherein the step of embedding the stainless steel pipe is as follows: embedding the chromium-containing stainless steel pipe (3) into a wax mold of the aluminum alloy casting (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211196597.2A CN115491680A (en) | 2022-09-29 | 2022-09-29 | Method for preventing stainless steel pipe in aluminum alloy casting from rusting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211196597.2A CN115491680A (en) | 2022-09-29 | 2022-09-29 | Method for preventing stainless steel pipe in aluminum alloy casting from rusting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115491680A true CN115491680A (en) | 2022-12-20 |
Family
ID=84471599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211196597.2A Pending CN115491680A (en) | 2022-09-29 | 2022-09-29 | Method for preventing stainless steel pipe in aluminum alloy casting from rusting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115491680A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05302123A (en) * | 1992-02-14 | 1993-11-16 | Kubota Corp | Method for heat-treating clad pipe |
| CN1107399A (en) * | 1994-03-28 | 1995-08-30 | 本溪钢铁公司 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
| CN102899466A (en) * | 2012-09-27 | 2013-01-30 | 攀钢集团成都钢钒有限公司 | Processing method for preventing inner surface oxidization of steel pipe during heat treatment |
| CN105710299A (en) * | 2014-12-05 | 2016-06-29 | 青岛泰威机床有限公司 | Investment casting method |
| CN206319033U (en) * | 2016-11-30 | 2017-07-11 | 内蒙古包钢钢联股份有限公司 | The steel end-quenched heat treatment protective case of laboratory steel |
| CN110142395A (en) * | 2019-06-25 | 2019-08-20 | 遵义航天新力精密铸锻有限公司 | Aluminium alloy coldplate casting technique |
| CN112111636A (en) * | 2020-09-15 | 2020-12-22 | 扬州大学 | Anti-oxidation graphene carbon powder mixing protection process used in laboratory single disc spring high-temperature heat preservation process |
-
2022
- 2022-09-29 CN CN202211196597.2A patent/CN115491680A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05302123A (en) * | 1992-02-14 | 1993-11-16 | Kubota Corp | Method for heat-treating clad pipe |
| CN1107399A (en) * | 1994-03-28 | 1995-08-30 | 本溪钢铁公司 | Anti-oxidation method for inwall of steel pipe inlaid in casting |
| CN102899466A (en) * | 2012-09-27 | 2013-01-30 | 攀钢集团成都钢钒有限公司 | Processing method for preventing inner surface oxidization of steel pipe during heat treatment |
| CN105710299A (en) * | 2014-12-05 | 2016-06-29 | 青岛泰威机床有限公司 | Investment casting method |
| CN206319033U (en) * | 2016-11-30 | 2017-07-11 | 内蒙古包钢钢联股份有限公司 | The steel end-quenched heat treatment protective case of laboratory steel |
| CN110142395A (en) * | 2019-06-25 | 2019-08-20 | 遵义航天新力精密铸锻有限公司 | Aluminium alloy coldplate casting technique |
| CN112111636A (en) * | 2020-09-15 | 2020-12-22 | 扬州大学 | Anti-oxidation graphene carbon powder mixing protection process used in laboratory single disc spring high-temperature heat preservation process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61216877A (en) | Manufacture of internal clad tubular product | |
| CA2109366C (en) | Passivation of carbon steel using encapsulated oxygen | |
| JP5982285B2 (en) | Corrosion resistant metal products | |
| CN103451647B (en) | Preparation method for centrifugal self-propagating ceramic/alloy double-compound wear-resistant tube | |
| CN115491680A (en) | Method for preventing stainless steel pipe in aluminum alloy casting from rusting | |
| US20170113274A1 (en) | Method for manufacturing a metallic component which is possible to pickle | |
| KR102243604B1 (en) | Manufacturing method of seamless integrated condensate pot | |
| CN101570801A (en) | Copper cooling plate and manufacturing process thereof | |
| CN105618716B (en) | A kind of zinc anode material and tubing and casing conductive connection manner and processing method | |
| US3225400A (en) | Method for casting transition couplings | |
| CN107175421B (en) | A kind of compressive pre-stress bimetal centrifugal is cast the welding procedures of compound pipe end flanges | |
| CN107803484A (en) | A kind of high temperature resistant chill | |
| JP3714135B2 (en) | Cooling pipe casting method | |
| JP4764008B2 (en) | COOLING ELEMENT AND MANUFACTURING METHOD THEREOF | |
| JP2002020821A (en) | Pipe for introducing gas into molten metal and its manufacturing method | |
| JPS6170389A (en) | Method of sealing heat pipe | |
| JP2996759B2 (en) | Casting method of cast-in pipe in cylinder cooled liner for diesel engine | |
| CN116475269A (en) | Production process of novel high-tightness anticorrosive material steel lining butterfly valve | |
| FI129309B (en) | A central tire inflation system (ctis) channel and manufacturing methods thereof | |
| JP5032349B2 (en) | Method for manufacturing hermetic seal parts | |
| JPH10314921A (en) | Cooling pipe cast-in casting steel product and its manufacture | |
| JPS6018745B2 (en) | Melt plating method for the inner surface of metal tubes | |
| JP2003001393A (en) | Relining method for hollow member with wear-resistant layer on inner circumferential surface | |
| JPS5944957B2 (en) | Dehydrogenation equipment for welding difficult-to-weld materials | |
| JPH03264154A (en) | Heat exchanging body casting having excellent cooling capacity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221220 |
|
| RJ01 | Rejection of invention patent application after publication |