CN110643899A - Forging method of low-temperature-resistant forging for petrochemical industry - Google Patents
Forging method of low-temperature-resistant forging for petrochemical industry Download PDFInfo
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- CN110643899A CN110643899A CN201911019324.9A CN201911019324A CN110643899A CN 110643899 A CN110643899 A CN 110643899A CN 201911019324 A CN201911019324 A CN 201911019324A CN 110643899 A CN110643899 A CN 110643899A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/32—Making machine elements wheels; discs discs, e.g. disc wheels
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- 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
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- 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
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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- 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
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- 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
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- 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
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- 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)
- Heat Treatment Of Steel (AREA)
- Forging (AREA)
Abstract
The invention discloses a forging method of a low-temperature-resistant forging for petrochemical use, which comprises the following steps of S1 smelting, smelting raw materials by adopting electric furnace smelting and external refining, wherein the raw materials comprise 0.06% ~ 0.07.07% of C, 0.25% ~ 0.4.4% of Si, 0.25% ~ 0.27.27% of Mn, less than or equal to 0.013% of P, less than or equal to 0.01% of S, 0.80% ~ 1.30.30% of Cr, 0.25% ~ 0.9.9% of Ni, 0.50% ~ 0.80.80% of Mo, 0.035% ~ 0.042.042% of Nb, 0.01% to 0.03% of V, 0.50% ~ 0.80.80% of Cu, 0.02% ~ 0.05.05% of Ti, 0.012% ~ 0.013.013% of Al, 1.00% of Si, 0.00% of ~ 2.00.00% of Cu, the balance of Fe and inevitable impurities, the raw materials are smelted into tantalum, the chemical components are cheap, the ingot is cast at low temperature, the cost is low, and the ingot is suitable for use, and the cost is low.
Description
Technical Field
The invention relates to a forging method of a petrochemical low-temperature-resistant forging.
Background
The special low-temperature-resistant corrosion-resistant steel is mainly applied to the machinery manufacturing industries of petroleum industry, instruments, standard parts and the like. Over 400 million tons are consumed worldwide, half of which are produced in the united states, japan. In 2013, the demand of the special low-temperature-resistant steel in China is about 40-50 ten thousand tons, and the annual output of China is only 3 ten thousand tons and needs to be imported in large quantity. With the development of modern industry in China, the market potential of the special low-temperature-resistant steel is huge.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a forging method of a petrochemical low-temperature-resistant forging.
In order to achieve the aim, the technical scheme of the invention is to design a forging method of a petrochemical low-temperature-resistant forging, which comprises the following steps:
s1, smelting the raw materials by adopting an electric furnace smelting and an external refining, wherein the raw materials comprise, by mass, 0.06% ~ 0.07.07% of C, 0.25% ~ 0.4.4% of Si, 0.25% ~ 0.27.27% of Mn, less than or equal to 0.013% of P, less than or equal to 0.01% of S, 0.80% ~ 1.30.30% of Cr, 0.25% ~ 0.9.9% of Ni, 0.50% ~ 0.80.80% of Mo, 0.035% to 0.042% of Nb, 0.01% to 0.03% of V, 0.50% ~ 0.80.80% of Cu, 0.02% to 0.05% of Ti, 0.012% to 0.013% of Al and the balance of iron and inevitable impurities, and casting into ingots after the smelting is finished;
s2: blanking: calculating the size of the required blank according to the quality of the forging stock, and sawing a steel ingot by using a sawing machine;
s3: heating before forging, placing the blanked steel ingot in a natural gas heating furnace for heating, keeping the temperature for 1.2 hours after heating to 1280 ℃, and then discharging from the furnace for forging;
s4: forging, namely forging the blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 4;
s5: heat treatment after forging; normalizing and tempering are adopted;
s6: product detection, namely performing rough machining, ultrasonic nondestructive testing, finish machining and drilling on the forged flange in sequence;
s7: and (7) packaging and warehousing.
The further improvement is that: in step S5, the normalizing comprises heating to 900 +/-20 ℃, keeping the temperature for 1.5 min/mm according to the thickness of the forging, and then carrying out water cooling or oil cooling.
The further improvement is that: in step S5, tempering includes heating to 900 +/-20 ℃, keeping the temperature for 1.8 min/mm according to the thickness of the forging piece, and then cooling in air.
The invention has the advantages and beneficial effects that: niobium added to the chemical components provides excellent stability and corrosion resistance, and thus is suitable for use at low temperatures, has high corrosion resistance, is suitable for petrochemical use, is cheaper than tantalum, and can reduce the cost.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A forging method of a petrochemical low-temperature-resistant forging piece comprises the following steps:
s1, smelting raw materials by adopting an electric furnace smelting and an external refining, wherein the raw materials comprise, by mass, 0.06% of ~ 0.07.07% of C, 0.25% of ~ 0.4.4% of Si, 0.25% of ~ 0.27.27% of Mn, less than or equal to 0.013% of P, less than or equal to 0.01% of S, 0.80% of Cr, ~ 1.30.30% of Ni, 0.25% of ~ 0.9.9% of Ni, 0.50% of ~ 0.80.80% of Mo, 0.035% of Nb, 0.64% of ~ 0.042, 0.042% of V, 0.01% -0.03% of Cu, 0.50% of ~ 0.80.80% of Cu, 0.02% of ~ 0.05.05% of Ti, 0.012% of Al, ~ 0.013.013% of Si, 1.00% of ~ 2.00.00% of Si, and the balance of iron and inevitable impurities, and casting into ingots after the smelting is finished;
s2: blanking: calculating the size of the required blank according to the quality of the forging stock, and sawing a steel ingot by using a sawing machine;
s3: heating before forging, placing the blanked steel ingot in a natural gas heating furnace for heating, keeping the temperature for 1.2 hours after heating to 1280 ℃, and then discharging from the furnace for forging;
s4: forging, namely forging the blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 4;
s5: heat treatment after forging; normalizing and tempering are adopted;
s6: product detection, namely performing rough machining, ultrasonic nondestructive testing, finish machining and drilling on the forged flange in sequence;
s7: and (7) packaging and warehousing.
In the preferred embodiment of the present invention, in step S5, the normalizing includes heating to 900 ℃ ± 20, holding the forging thickness for 1.5 min/mm, and then performing water cooling or oil cooling.
In the preferred embodiment of this embodiment, in step S5, the tempering includes heating to 900 ℃ ± 20, holding the forging thickness for 1.8 min/mm, and then cooling with air.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A forging method of a petrochemical low-temperature-resistant forging is characterized by comprising the following steps:
s1, smelting raw materials by adopting an electric furnace smelting and an external refining, wherein the raw materials comprise, by mass, 0.06% of ~ 0.07.07% of C, 0.25% of ~ 0.4.4% of Si, 0.25% of ~ 0.27.27% of Mn, less than or equal to 0.013% of P, less than or equal to 0.01% of S, 0.80% of Cr, ~ 1.30.30% of Ni, 0.25% of ~ 0.9.9% of Ni, 0.50% of ~ 0.80.80% of Mo, 0.035% of Nb, 0.64% of ~ 0.042, 0.042% of V, 0.01% -0.03% of Cu, 0.50% of ~ 0.80.80% of Cu, 0.02% of ~ 0.05.05% of Ti, 0.012% of Al, ~ 0.013.013% of Si, 1.00% of ~ 2.00.00% of Si, and the balance of iron and inevitable impurities, and casting into ingots after the smelting is finished;
s2: blanking: calculating the size of the required blank according to the quality of the forging stock, and sawing a steel ingot by using a sawing machine;
s3: heating before forging, placing the blanked steel ingot in a natural gas heating furnace for heating, keeping the temperature for 1.2 hours after heating to 1280 ℃, and then discharging from the furnace for forging;
s4: forging, namely forging the blank into a flange in a free forging and ring rolling mode, wherein the forging ratio is more than or equal to 4;
s5: heat treatment after forging; normalizing and tempering are adopted;
s6: product detection, namely performing rough machining, ultrasonic nondestructive testing, finish machining and drilling on the forged flange in sequence;
s7: and (7) packaging and warehousing.
2. The method of forging a petrochemical low temperature resistant forging according to claim 1, wherein the normalizing comprises heating to 900 ℃ ± 20, holding for 1.5 min/mm based on the thickness of the forging, and then cooling with water or oil at step S5.
3. The method of forging a petrochemical low temperature resistant forging according to claim 1, wherein the tempering comprises heating to 900 ℃ ± 20 for a holding time of 1.8 min/mm based on the thickness of the forging, and then cooling with air in step S5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019324.9A CN110643899A (en) | 2019-10-24 | 2019-10-24 | Forging method of low-temperature-resistant forging for petrochemical industry |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911019324.9A CN110643899A (en) | 2019-10-24 | 2019-10-24 | Forging method of low-temperature-resistant forging for petrochemical industry |
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| CN110643899A true CN110643899A (en) | 2020-01-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016005615A1 (en) * | 2014-07-08 | 2016-01-14 | Gerdau Investigacion Y Desarrollo Europa, S.A. | Microalloyed steel for heat-forming high-resistance and high-yield-strength parts, and method for producing components made of said steel |
| CN109518087A (en) * | 2018-12-17 | 2019-03-26 | 苏州孚杰机械有限公司 | For the corrosion resistant oil field valve body of low temperature low-alloy high-strength and its forging technology |
| CN110106308A (en) * | 2019-04-30 | 2019-08-09 | 无锡市法兰锻造有限公司 | A kind of manufacturing method of high-performance 12Cr2Mo1 forging |
| CN110306120A (en) * | 2018-03-20 | 2019-10-08 | 中国石油天然气集团有限公司 | A kind of X80 steel-grade D1422mm seamless steel elbow and its manufacturing method |
-
2019
- 2019-10-24 CN CN201911019324.9A patent/CN110643899A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016005615A1 (en) * | 2014-07-08 | 2016-01-14 | Gerdau Investigacion Y Desarrollo Europa, S.A. | Microalloyed steel for heat-forming high-resistance and high-yield-strength parts, and method for producing components made of said steel |
| CN110306120A (en) * | 2018-03-20 | 2019-10-08 | 中国石油天然气集团有限公司 | A kind of X80 steel-grade D1422mm seamless steel elbow and its manufacturing method |
| CN109518087A (en) * | 2018-12-17 | 2019-03-26 | 苏州孚杰机械有限公司 | For the corrosion resistant oil field valve body of low temperature low-alloy high-strength and its forging technology |
| CN110106308A (en) * | 2019-04-30 | 2019-08-09 | 无锡市法兰锻造有限公司 | A kind of manufacturing method of high-performance 12Cr2Mo1 forging |
Non-Patent Citations (1)
| Title |
|---|
| 齐俊杰: "《微合金化钢》", 1 May 2006, 冶金工业出版社 * |
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Application publication date: 20200103 |