CN112626413A - Aviation case product and production process thereof - Google Patents
Aviation case product and production process thereof Download PDFInfo
- Publication number
- CN112626413A CN112626413A CN202011361728.9A CN202011361728A CN112626413A CN 112626413 A CN112626413 A CN 112626413A CN 202011361728 A CN202011361728 A CN 202011361728A CN 112626413 A CN112626413 A CN 112626413A
- Authority
- CN
- China
- Prior art keywords
- casting
- production process
- steel
- product
- temperature
- 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
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
The invention aims to solve the problems of high production cost and low efficiency of forging and forming of parts with large volume and complex structure such as casings, and discloses a casing product for aviation, which is prepared from 1Cr11Ni2W2MoV steel through a sand casting process. The invention also discloses a production process of the aviation case type product, which comprises the steps of 1, molding sand casting; step 2, smelting 1Cr11Ni2W2MoV steel; step 3, casting; step 4, opening the mold, and treating a casting head to obtain a casting semi-finished product; and 5, carrying out heat treatment on the semi-finished casting to obtain an aviation case product. The invention provides an aviation case product which has lower processing cost. The invention also provides a production process of the aviation case type product, compared with a forging processing process, the production cost is greatly reduced, and the production efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of metallurgical production processes, in particular to an aviation case product and a production process thereof.
Background
The 1Cr11Ni2W2MoV steel is a martensitic stainless steel which is successfully developed in the end of 50 years of the original Soviet Union and has the mark of 961. The 1Cr11Ni2W2MoV steel is a novel martensite heat-resistant stainless steel obtained by adding a large amount of elements formed by ferrite in a reduced austenite phase region, such as W, Mo and V, into a low-carbon 12% Cr steel to enable the steel to have martensite phase transformation hardening capacity. The steel grade has good comprehensive mechanical properties and is widely applied to the aviation industry.
Most of the 1Cr11Ni2W2MoV steel is forgings. For some parts with large volume and complex structure, such as a casing product, forging and forming are not advantageous due to high production cost and low efficiency. Meanwhile, the related 1Cr11Ni2W2MoV steel grit type casting processing is not reported at home.
Disclosure of Invention
The invention aims to solve the problems of high production cost and low efficiency of forging and forming of parts with large volume and complex structure, such as casings, so as to reduce the production cost and improve the production efficiency.
The invention provides an aviation case product which has lower processing cost.
The invention also provides a production process of the aviation case type product, compared with a forging processing process, the production cost is greatly reduced, and the production efficiency is greatly improved.
The technical scheme adopted by the invention is as follows:
the aeronautical casing product is produced with 1Cr11Ni2W2MoV steel and through sand casting process.
In one embodiment of the invention, the main components of the Cr11Ni2W2MoV steel are as follows:
C 0.11~0.14%
Si 0.30~0.45%
Mn 0.40~0.55%
p is far less than 0.030%
S is far less than 0.025%
Cr 10.60~11.50%
Ni 1.50~1.80%
W 1.55~1.70%
Mo 0.35~0.50%
V 0.18~0.30%
The balance of Fe.
A production process of aviation case products comprises the following steps
Step 1, molding sand and casting a mold;
step 2, smelting 1Cr11Ni2W2MoV steel;
step 3, casting;
step 4, opening the mold, and treating a casting head to obtain a casting semi-finished product;
and 5, carrying out heat treatment on the semi-finished casting to obtain an aviation case product.
In one embodiment of the invention, in the step 2, the intermediate frequency furnace and the AOD refining furnace are adopted successively when 1Cr11Ni2W2MoV is smelted.
In one embodiment of the invention, the Al content of the 1Cr11Ni2W2MoV steel smelted in the step 2 is less than or equal to 0.03%.
In one embodiment of the invention, the molten steel is kept still for more than or equal to 3min before casting in the step 3.
In one embodiment of the invention, in the step 3, the casting temperature of the molten steel is 1585-1595 ℃.
In one embodiment of the invention, in the step 4, the mold opening temperature is 200-300 ℃.
In one embodiment of the invention, in the step 5, during heat treatment, a first-stage normalizing is performed at a temperature of 1000-1020 ℃, the temperature is kept for 4-5 hours, and air cooling is performed; and (4) two-stage tempering, wherein the temperature is 540-590 ℃, the temperature is kept for 4.5-5.5 h, and air cooling is carried out.
The invention has the beneficial effects that:
1. the invention provides an aviation case product, which aims to solve the problem that forging forming does not have advantages due to high production cost and low efficiency for some parts with larger volume and complex structure, such as case products. The casing product is prepared from 1Cr11Ni2W2MoV steel through a sand casting process, and has lower processing cost compared with forging processing.
2. The invention also provides a production process of the aviation case type product, wherein 1Cr11Ni2W2MoV steel is directly subjected to sand casting molding after being smelted. Compared with a forging processing technology, the production cost is reduced by about 40%, the production efficiency is greatly improved, and the production period is shortened to 20-24 hours.
Drawings
FIG. 1 is a first schematic view of a sand cast casing product according to example 2.
Fig. 2 is a second schematic view of a sand cast casing product according to example 2.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
The following examples are given for illustrative purposes.
In order to solve the problem that forging forming of parts with large volume and complex structure, such as casings, has no advantages due to high production cost and low efficiency, the present embodiment provides a production process of casings for aviation, which comprises the following process flows:
one, sand casting mould
And manufacturing a wood model according to the drawing size of a case product, and reserving a machining allowance of 10mm on a single side.
And (2) taking water glass as a binder, putting a wooden model into the sand, filling the sand around the wooden model, opening a box, and taking out the wooden model to form the molding sand mold.
Smelting of 1Cr11Ni2W2MoV steel
The main components of the 1Cr11Ni2W2MoV steel are as follows:
C 0.11~0.14%
Si 0.30~0.45%
Mn 0.40~0.55%
p is far less than 0.030%
S is far less than 0.025%
Cr 10.60~11.50%
Ni 1.50~1.80%
W 1.55~1.70%
Mo 0.35~0.50%
V 0.18~0.30%
The balance of Fe.
When 1Cr11Ni2W2MoV steel is smelted, an intermediate frequency furnace and an AOD refining furnace are adopted for operation in sequence. Namely, 1Cr11Ni2W2MoV steel is heated in an intermediate frequency furnace to form molten steel, and then transferred into an AOD refining furnace for refining. Reduce the inclusion, gas and impurity elements in the 1Cr11Ni2W2MoV steel.
The temperature in the intermediate frequency furnace is 1650-1700 ℃.
When refining in the AOD refining furnace, mixed gas of oxygen and nitrogen is injected. The injection ratio of the initial oxygen to the nitrogen is 5-6: 1, and the flow rate of the nitrogen is 50M3H is used as the reference value. The injection ratio of oxygen and nitrogen is adjusted along with the reduction of the carbon content, and finally the nitrogen flow rate is adjusted to be 120M3H is used as the reference value. After refining, adjusting the temperature to 1600-1620 ℃.
After 1Cr11Ni2W2MoV steel is smelted, the Al content is less than or equal to 0.03 percent.
Third, casting
And standing the refined molten steel before casting for more than or equal to 3 min.
And (3) after standing, casting the molten steel into a molding sand casting mold, wherein the casting temperature is 1585-1595 ℃. When two types of sand casting molds are cast, the two water inlets are sequentially filled with water.
Fourthly, opening the mould
And after the casting is finished, naturally cooling, and waiting for opening the die. And the mold opening temperature is 200-300 ℃. And after opening the die, carrying out gas cutting by utilizing waste heat or heating to 200-300 ℃, and planing a casting head to obtain a casting semi-finished product.
Fifth, heat treatment
And (4) carrying out heat treatment on the semi-finished casting to obtain an aviation case product.
During heat treatment, normalizing for the first time at 1000-1020 ℃, preserving heat for 4-5 h, and cooling in air; and (4) two-stage tempering, wherein the temperature is 540-590 ℃, the temperature is kept for 4.5-5.5 h, and air cooling is carried out.
In the production process, 1Cr11Ni2W2MoV steel is directly subjected to sand casting molding after being smelted. Compared with a forging processing technology, the processing cost is reduced, and the production efficiency is greatly improved.
Compared with a forging processing technology, the production technology of the aviation case type product in the embodiment has the advantages that the processing cost is reduced by about 40%, the production efficiency is greatly improved, and the production period is shortened to 20-24 hours.
Example 1 was carried out by referring to the above method, casting was carried out as in-furnace casting of test specimens, tempering temperature 560 ℃.
Example 2 was carried out by referring to the above method, and cast into test specimens of casing type product bodies, tempering temperature 560 ℃.
Example 3 was carried out by referring to the above method, casting was carried out as in-furnace casting of test specimens with a tempering temperature of 590 ℃.
Example 4 was carried out by referring to the above method, and cast into test specimens of casing type product bodies, tempering temperature 590 ℃.
The results of the tests of examples 1 to 4 are shown in the following table:
| technical index | Example 1 | Example 2 | Example 3 | Example 4 |
| Tensile strength of not less than 1080Mpa | 1103 | 1165 | 1071 | 1119 |
| Stipulate the nonproportional elongation strength RP0.2 not less than 885MPa | 945 | 989 | 925 | 955 |
| The elongation rate A is more than or equal to 12 percent | 15 | 14 | 12 | 15 |
| The reduction of area Z is more than or equal to 50 percent | 56 | 57 | 52 | 53 |
| Impact power of not less than 55J | 63、67、77 | 60、64、62 | 57、56、55 | 60、55、57 |
| Brinell hardness value HBW, 311~388 | 352、350、350 | 341、341、341 | 325、325、325 | 350、350、350 |
The detection results in the table show that all indexes of the box-type product processed by the method in the embodiment all meet the required values, namely the 1Cr11Ni2W2MoV steel can be processed into parts with larger volume and complex structures by adopting a sand casting process.
Fig. 1 and 2 are physical diagrams of a body cast as a casing type product in example 2. As can be seen from the figure, the surface of the casing product cast by the sand mold is uniform and flat, and has no visible defects such as holes, cracks and the like. Through ultrasonic detection, the thickness of the casing type product is uniform, no crack and no sand hole exist in the casing type product, and the use requirement is met.
Claims (9)
1. The aeronautical case product is characterized by being prepared from 1Cr11Ni2W2MoV steel through a sand casting process.
2. The aeronautical case product according to claim 1, wherein the Cr11Ni2W2MoV steel comprises the following main components:
C 0.11~0.14%
Si 0.30~0.45%
Mn 0.40~0.55%
p is far less than 0.030%
S is far less than 0.025%
Cr 10.60~11.50%
Ni 1.50~1.80%
W 1.55~1.70%
Mo 0.35~0.50%
V 0.18~0.30%
The balance of Fe.
3. The production process of the aviation case type product is characterized by comprising the following steps
Step 1, molding sand and casting a mold;
step 2, smelting 1Cr11Ni2W2MoV steel;
step 3, casting;
step 4, opening the mold, and treating a casting head to obtain a casting semi-finished product;
and 5, carrying out heat treatment on the semi-finished casting to obtain an aviation case product.
4. The production process of the aeronautical cartridge receiver product according to claim 3, wherein in the step 2, an intermediate frequency furnace and an AOD refining furnace are adopted in sequence when 1Cr11Ni2W2MoV is smelted.
5. The production process of the aeronautical case product according to claim 3 or 4, wherein in the step 2, after the 1Cr11Ni2W2MoV steel is smelted, the Al content is less than or equal to 0.03%.
6. The production process of the aeronautical case product according to claim 3, wherein in the step 3, the molten steel is kept still for more than or equal to 3min before casting.
7. The production process of the aeronautical engine case product according to claim 3 or 6, wherein in the step 3, the casting temperature of the molten steel is 1585-1595 ℃.
8. The production process of the aviation case type product according to claim 3, wherein in the step 4, the mold opening temperature is 200-300 ℃.
9. The production process of the aviation case product as claimed in claim 3, wherein in the step 5, during the heat treatment, the first section of normalizing is carried out at the temperature of 1000-1020 ℃, the temperature is kept for 4-5 hours, and air cooling is carried out; and (4) two-stage tempering, wherein the temperature is 540-590 ℃, the temperature is kept for 4.5-5.5 h, and air cooling is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011361728.9A CN112626413A (en) | 2020-11-28 | 2020-11-28 | Aviation case product and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011361728.9A CN112626413A (en) | 2020-11-28 | 2020-11-28 | Aviation case product and production process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112626413A true CN112626413A (en) | 2021-04-09 |
Family
ID=75306819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011361728.9A Pending CN112626413A (en) | 2020-11-28 | 2020-11-28 | Aviation case product and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112626413A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613579A (en) * | 2004-10-09 | 2005-05-11 | 沈阳铸造研究所 | Guiding blade of electric slag casting dissimilar steel water turbine |
| JP3723924B2 (en) * | 1995-04-03 | 2005-12-07 | 株式会社日本製鋼所 | Heat-resistant cast steel and method for producing the same |
| US20070071599A1 (en) * | 2005-09-29 | 2007-03-29 | Masahiko Arai | High-strength heat resisting cast steel, method of producing the steel, and applications of the steel |
| CN102560275A (en) * | 2010-12-28 | 2012-07-11 | 株式会社东芝 | Heat resistant cast steel, manufacturing method thereof, cast parts of steam turbine, and manufacturing method of cast parts of steam turbine |
| CN103131964A (en) * | 2013-03-26 | 2013-06-05 | 上海交通大学 | Method for improving as-cast structure homogeneity of X12CrMoWVNbN10-1-1 martensitic stainless steel |
| CN104294152A (en) * | 2013-07-16 | 2015-01-21 | 无锡华冶钢铁有限公司 | 12Cr2Ni4A structural alloy steel and gear processing and manufacturing method |
| CN104674273A (en) * | 2013-11-28 | 2015-06-03 | 沈阳黎明航空发动机(集团)有限责任公司 | High-temperature sealant removing agent and preparation method thereof |
| CN109382483A (en) * | 2018-11-14 | 2019-02-26 | 安徽应流集团霍山铸造有限公司 | A kind of casting method of the big valve castings of the narrow thickness of intracavity space |
| CN110468338A (en) * | 2019-09-24 | 2019-11-19 | 成都先进金属材料产业技术研究院有限公司 | 1Cr11Ni2W2MoV heat resisting steel and its quenching-and-tempering process method |
-
2020
- 2020-11-28 CN CN202011361728.9A patent/CN112626413A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3723924B2 (en) * | 1995-04-03 | 2005-12-07 | 株式会社日本製鋼所 | Heat-resistant cast steel and method for producing the same |
| CN1613579A (en) * | 2004-10-09 | 2005-05-11 | 沈阳铸造研究所 | Guiding blade of electric slag casting dissimilar steel water turbine |
| US20070071599A1 (en) * | 2005-09-29 | 2007-03-29 | Masahiko Arai | High-strength heat resisting cast steel, method of producing the steel, and applications of the steel |
| CN102560275A (en) * | 2010-12-28 | 2012-07-11 | 株式会社东芝 | Heat resistant cast steel, manufacturing method thereof, cast parts of steam turbine, and manufacturing method of cast parts of steam turbine |
| CN103131964A (en) * | 2013-03-26 | 2013-06-05 | 上海交通大学 | Method for improving as-cast structure homogeneity of X12CrMoWVNbN10-1-1 martensitic stainless steel |
| CN104294152A (en) * | 2013-07-16 | 2015-01-21 | 无锡华冶钢铁有限公司 | 12Cr2Ni4A structural alloy steel and gear processing and manufacturing method |
| CN104674273A (en) * | 2013-11-28 | 2015-06-03 | 沈阳黎明航空发动机(集团)有限责任公司 | High-temperature sealant removing agent and preparation method thereof |
| CN109382483A (en) * | 2018-11-14 | 2019-02-26 | 安徽应流集团霍山铸造有限公司 | A kind of casting method of the big valve castings of the narrow thickness of intracavity space |
| CN110468338A (en) * | 2019-09-24 | 2019-11-19 | 成都先进金属材料产业技术研究院有限公司 | 1Cr11Ni2W2MoV heat resisting steel and its quenching-and-tempering process method |
Non-Patent Citations (1)
| Title |
|---|
| 《工程材料实用手册》编辑委员会: "《工程材料实用手册 第1卷 结构钢 不锈钢 第2版》", 31 July 2002, 中国标准出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107937828B (en) | F6NM martensitic stainless steel cylinder forging and heat treatment method | |
| CN106811580B (en) | A kind of annealing process of H13 hot die steels | |
| US20150144233A1 (en) | Hybrid mold steel and manufacturing method thereof | |
| CN100359036C (en) | Cast steel for bearing parts in mechanical lifting system and its making process | |
| US20060037675A1 (en) | Method for production and forming of cast pieces of spheroidal graphite with improved mechanical properties | |
| CN113862434B (en) | Heat treatment process of 35CrNi3MoVR material for thick-wall ultrahigh-pressure container | |
| CN111057934A (en) | High-performance hot-work die steel and production process thereof | |
| CN109402514A (en) | A kind of dedicated hot stamping die steel HS7 and preparation method thereof | |
| CN111286682B (en) | Low-alloy ultrahigh-strength steel and heat treatment process thereof | |
| EP4261320A1 (en) | High-strength and toughness free-cutting non-quenched and tempered round steel and manufacturing method therefor | |
| CN112795843A (en) | Hot work die steel and preparation method thereof | |
| CN114959192A (en) | Heat treatment process method for improving low-temperature impact toughness of low-carbon low-alloy steel | |
| CN102876982A (en) | Axle steel and its manufacturing method | |
| CN113122684A (en) | Processing method for improving SDH13 performance of die steel | |
| CN108624826A (en) | Die steel and its manufacturing method | |
| CN113462988B (en) | Valve body casting and casting process thereof | |
| CN112593059B (en) | Thermal deformation method for reducing delta ferrite content in martensitic stainless steel | |
| CN113737106B (en) | Die steel for 1500MPa hot stamping part cold trimming punching cutter and preparation method thereof | |
| CN110042324B (en) | Container corner fitting production process | |
| JP4432012B2 (en) | Die-casting mold manufacturing method and die-casting mold | |
| CN109022697B (en) | A kind of Micro Alloying mould steel and preparation method thereof | |
| CN112626413A (en) | Aviation case product and production process thereof | |
| CN111057952A (en) | High-isotropy hot work die steel and heat treatment process thereof | |
| CN116144909A (en) | Non-quenched and tempered steel motor shaft and preparation method and application thereof | |
| CN113462951B (en) | Preparation method of ultrahigh-strength and high-toughness alloy steel |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 610000 No. 939, Tianxing Avenue, Qingbaijiang District, Chengdu, Sichuan Applicant after: SICHUAN WEIZHEN HI-TECH MATERIAL CO.,LTD. Address before: 610000 China (Sichuan) pilot Free Trade Zone, Chengdu, Sichuan 1509 xiangdao Avenue, Qingbaijiang District, Chengdu (a0412-a0413, 4th floor, area a, Chengdu International Railway Port) Applicant before: SICHUAN WEIZHEN HI-TECH MATERIAL CO.,LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210409 |