CN1142420A - Manufacture of alloy steel, special steel and high temperature alloy pipes - Google Patents
Manufacture of alloy steel, special steel and high temperature alloy pipes Download PDFInfo
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- CN1142420A CN1142420A CN 96106513 CN96106513A CN1142420A CN 1142420 A CN1142420 A CN 1142420A CN 96106513 CN96106513 CN 96106513 CN 96106513 A CN96106513 A CN 96106513A CN 1142420 A CN1142420 A CN 1142420A
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Abstract
A method for manufacturing large-diameter or very-large-diameter pipe with alloy steel, special steel or high-temp alloy steel includes such steps as spraying paint onto moulding cylinder that is rotating, preheating casting moulding cylinder, pouring molten steel, regulating rotative velocity, cooling and demoulding. The obtained pipe features compact organization and high comprehensive mechanical performance.
Description
The present invention relates to the manufacture method of a kind of steel alloy, special steel, high temperature alloy pipes.
Application number is that No. 92112681.6 patents " centre spinning method of a kind of special steel, high-temperature alloy steel seamless pipe " provide a kind of method of making seamless pipe, its shortcoming is that the limitation of this method is big, condition is comparatively harsh, so that causes the low of the waste of the energy or production efficiency.
The object of the invention is that the applicant was through studying intensively in recent years, testing, overcome the circumscribed shortcoming of art methods and provide a kind of working condition to satisfy easily, energy savings, the perhaps manufacture method of the steel alloy that production efficiency is high, special steel, high temperature alloy pipes.
The present invention seeks to realize like this, on the method basis of existing centrifugal casting seamless pipe, carried out deep research and test repeatedly, designed following production stage.
At first, kiln on the type tube after the cleaning is baked to more than 100 ℃, less than 300 ℃, perhaps greater than 500 ℃ to below 800 ℃, remove moisture content and greasy dirt, it is above less than 100 ℃ or greater than 200 ℃ to cool to room temperature again, and less than 700 ℃.
Then, at the type tube inner-wall spraying or directly pour coating into, shower nozzle is arranged in the type tube, move back and forth along the type tube axis, with the coating atomisation, be adhered to the type tube inwall by gases at high pressure, during spraying or when directly pouring into, even for guaranteeing coating, type tube will be done uniform rotation, and rotating speed is less than 500 rev/mins more than 300 rev/mins, or greater than 1000 rev/mins, less than 1600 rev/mins, coating is that refractory material and bonding agent mix, and refractory material can be selected zirconium English powder, schmigel, mullite powder etc. for use; Bonding agent can be selected Ludox, dextrin, polyvinyl alcohol etc. for use.The weight ratio 100 of refractory material and bonding agent: 1-30 mixes the back thin up, and its weight ratio of mixing back coating and water is:
Coating 1
Water 0.01-5
For making molten steel have good flowability and filling velocity faster after entering casting mold, paint thickness will be in the 0.1-30mm scope, after type tube hangs up properly coating, last kiln drying, to keep in the kiln temperature greater than 50 ℃ less than 300 ℃ or greater than 500 ℃ less than 700 ℃.Oven dry back taking-ups etc. are to be cast.
The 3rd step, in type tube when cast alloys steel, special steel, high temperature alloy pipes, water to chew and extend into spray and hang up properly in the type tube of coating, it is above less than 200 ℃ of scopes that the temperature of type tube remains on room temperature during cast, perhaps greater than 400 ℃ less than between 600 ℃.The even rotating speed of its type tube is more than 300 rev/mins below 500 rev/mins, perhaps greater than 1400 rev/mins less than between 1600 rev/mins.At this rotating speed, can guarantee that the cast tube product has good density, and can reduce the alloying element segregation, eliminate loose shrinkage cavity and surperficial cold shut, the crystal grain thinning tissue is under reasonable rotating speed prerequisite, selecting the casting rate of molten steel is more than 10 Kilograms Per Seconds, but less than 50 Kilograms Per Seconds, perhaps greater than 200 Kilograms Per Seconds, and less than 500 Kilograms Per Seconds.When liquid steel temperature was high, flowing velocity was fast, and mold-filling capacity is strong, can reduce cold shut and far-end misrun phenomenon; But pouring temperature is higher, increases the alloying element segregation easily, and shrinkage cavity is loose, the thick tendency of crystal grain, therefore pouring temperature is determined on liquidus temperature pouring molten steel is gone in the type tube, type tube is added rapidly near giving decide rotating speed, observe liquid steel temperature situation of change in the type tube with the optics thermometer simultaneously, cast finishes, and when treating that temperature drops to subsolidus, stops after progressively reducing the type tube rotating speed, the demoulding when steel pipe temperature is reduced to less than 500 ℃, perhaps greater than 800 ℃ the time less than the demoulding in 1150 o'clock.
Adopt the inventive method can produce external diameter at 219-4000mm, long 1000-10000mm, the steel alloy of wall thickness 6-250mm, special steel, high temperature alloy pipes.The finished product requirement that is up to state standards.
Embodiment 1
Be example only below, the inventive method and experimental result are described to produce Φ 426 * 5000 * 12 type ZGICr18Ni9Ti centrifugally casing stainless steel tubes.
Select the 1250KVA basic electric arc furnace for use, alkaline Returning blowing keto technique process for making.Elements such as stokehold chemical examination control C, Si, Mn, P, S, Cr, Ni, Ti, Mo.Make the be up to state standards composition of GB222, GB223 of finished product.
Adopt horizontal friction rolling transmission centrifuge, motor is the commutator variable speed electric motors, particularly, and maximum speed is 1600 rev/mins, and the centrifugal casting type tube adopts the drum-type metal mold, and embedded plate washer is arranged in the two ends, and the formula that drenches with rain cooling system is to regulate cooling velocity.
At first kiln on the type tube after the cleaning is heated to 230 ℃, remove moisture content and greasy dirt, cool to 90 ℃, spray paint in type tube then, the composition of coating and weight ratio thereof are.
Schmigel 100 Ludox 8
Schmigel and Ludox are mixed the back thin up in proportion, and its weight ratio is:
The mixture 1 of schmigel and Ludox
Water 0.2
The type tube rotating speed was 1420 rev/mins when coating was hung in spray, and coating layer thickness is 2mm, and kiln drying on the type tube that hangs up properly coating, oven dry back kiln temperature remains on 250 ℃.
The 3rd step, pour steel, liquid steel temperature is chosen in 1560 ℃, and the type tube temperature is 180 ℃ during cast, poring rate is 230 Kilograms Per Seconds, and the type tube rotating speed is 1420 rev/mins, and cast finishes, treat that temperature reduces to 1100 ℃, type tube stops after progressively reducing rotating speed, the demoulding when steel pipe temperature is reduced to 400 ℃.At last, cleaning steel tube surface coating is heat-treated, and thorax in the outer again car reaches design size and surface smoothness requirement.
It is as follows that product is surveyed sample the result
1, pulling experiment (being undertaken) by BG639, GB228
| Font size | Heat (batch) number | Yield point ξ 0.2 | Tensile strength (MPa) | Percentage elongation % |
| ???001 | ????92023 | ????232 | ????539 | ????40 |
| ???002 | ????92024 | ????240 | ????560 | ????42 |
| ???003 | ????92025 | ????236 | ????520 | ????43 |
| ???004 | ????92026 | ????242 | ????540 | ????44 |
2, the presentation quality dimensional gaughing is good
3, the water pressure test (pressing international 241 by root) is good
4, flattening test (BG246 is pressed in sampling) is good
5, the Huey test of T method is good
Embodiment 2:
Below only to produce Φ 407 * 3852 * 34 type ZG14Cr
20Ni
32Nb high temperature alloy centrifugal casting hydrogen manufacturing reburner outlet header is an example, and the inventive method and experimental result are described.
Selecting power for use is the 1250KVA basic electric arc furnace, adopts the Returning blowing keto technique smelting process, and control is also analyzed C, Mn, Si, S, P, Cr, elements such as Ni, Nb, and add a small amount of trace element, tests by the GB223-89 requirement.
Adopt horizontal centrifuge to produce spun cast pipe, equipment is operated with example 1, and rotating speed is chosen as 1420 rev/mins, and all the other technological parameters are:
The composition of coating and weight ratio thereof are:
Zirconium English powder 100 Ludox 10
Zirconium English powder Ludox is mixed the back dilute with water, and its weight ratio is:
The mixture 1 of zirconium Ying Fen etc. and Ludox
Water 0.3
The rotating speed of type tube was 1420 rev/mins when coating was hung in spray, and paint thickness 2.5mm goes into kiln drying with the type tube that hangs up properly coating, and the temperature of drying kiln remains on 260 ℃.The 3rd step pour steel, the pouring molten steel temperature is chosen to be 1580 ℃, 200 ℃ of type tube temperature, annotating speed is 240 Kilograms Per Seconds, 1410 rev/mins of type tube rotating speeds, cast finishes, when follow procedure parking temperature is reduced to 400 ℃, the demoulding, cooling back machine adds the fine finishining finished product.
Two, sampling Detection result
1, mechanical property concetrated pipe mechanical property table 1
| Stove (pipe) number | Ambient temperature mechanical properties | Mechanical behavior under high temperature BG 3652-83 | ||||
| ?σ b | ????σ 0.2 | ????σ 5(％) | ????σ b | ?σ 0.2 | ?δ 5(％) | |
| ????93-223 | ?425 | ????199 | ????14.5 | ????196 | ????36 | |
| ????93-235 | ?381 | ????183 | ????12.8 | ????185 | ????32 | |
| ????93-236 | ?366 | ????169 | ????17.4 | ????169 | ????28 | |
Annotate: normal temperature is for reference.
σ unit is million a Ns/rice
2, following table together.
2, nondestructive inspection is in conjunction with ultrasonic and radiological survey X 10%GB5077-85II, by part
Lysimetric test BG9443-88.
3, water pressure test 240Kgf/cm
2
4, macrostructure pickle test GB226-91
Embodiment 3
Below only to produce Φ 603 * 14 * 4000 types, ZG35C
rMo centrifugal casting alloy cast tube is an example, and the inventive method and result of the test are described.
Select the 1250KVA basic electric arc furnace for use, adopt the steel-making of oxidation or half oxidizing process, control is also analyzed elements such as C, Mn, Si, S, P, Cr, Mo, reaches the requirement of GB3077-87.
Adopt horizontal friction rolling transmission centrifuge, the centrifugal casting type tube is selected the roller metal mold for use, with the formula cooling system that drenches with rain, to adjust cooling velocity.
Kiln on the type tube is baked to 240 ℃, removes moisture and greasy dirt, be cooled to 210 ℃ then to type tube inner chamber spray paint, the composition of coating and proportion are:
Mullite 100 Ludox 8.5
Mullite and Ludox are mixed the back thin up in proportion, and its weight ratio is
Mullite and Ludox mixture 1
Water 0.4
The type tube rotating speed was 495 rev/mins when coating was hung in spray, paint thickness 2.3mm, and kiln drying on the type tube that hangs up properly coating, bake out temperature is 270 ℃.
Pour steel, 1565 ℃ of liquid steel temperatures, poring rate is 280 Kilograms Per Seconds, the type tube rotating speed is 495 rev/mins, cast finishes, and when treating that temperature drops to subsolidus, stops after progressively reducing the type tube rotating speed, the steel pipe temperature drops to 300 ℃ of demouldings, and finishing then reaches product requirement.
Mechanical property
35CrMo spun cast pipe mechanical property table 1 heat (batch) number σ
Pσ
0.2δ 95-001 450 382 1095-003 430 375 1195-010 460 376 10.5 water pressure test 6-12Kg/cm
2Non-leakage.
Claims (3)
1, the manufacture method of a kind of steel alloy, special steel, high temperature alloy pipes is characterized in that:
(1) kiln on the type tube after the cleaning is baked to more than 100 ℃, less than 300 ℃, perhaps greater than 500 ℃ below 800 ℃, cool to again room temperature above less than 100 ℃ or greater than 200 ℃ less than 700 ℃,
(2) at the type tube inner-wall spraying or directly pour coating into, coating is that refractory material and bonding agent mix, its mixed weight ratio is 100: 1-30, mix the back thin up, its weight ratio is a coating: water=1: 0.01-5, thickness of coating layer is 0.1-30mm, when spraying or directly pouring into, type tube uniform rotation, its rotating speed be more than 300 rev/mins less than 500 rev/mins, perhaps greater than 1400 rev/mins less than 1600 rev/mins, after coating is hung in spray, kiln drying on the type tube, to keep in the kiln of oven dry back temperature greater than room temperature less than 300 ℃ or greater than 500 ℃ less than 700 ℃
(3) the gate spool period of the day from 11 p.m. to 1 a.m in type tube, the temperature of type tube remains on more than the room temperature, less than 200 ℃ of scopes, perhaps greater than 400 ℃ less than between 600 ℃.The even rotating speed of type tube is more than 300 rev/mins, below 500 rev/mins, perhaps greater than 1400 rev/mins less than 1600 rev/mins, pouring molten steel speed is that 10 Kilograms Per Seconds are above less than 50 Kilograms Per Seconds, and perhaps less than 500 Kilograms Per Seconds, cast finishes greater than 200 Kilograms Per Seconds, when treating that temperature drops to subsolidus, stop after progressively reducing the type tube rotating speed, the steel pipe temperature is reduced to less than 500 ℃, perhaps greater than 800 ℃ less than the demoulding in 1150 o'clock.
2, the manufacture method of a kind of steel alloy according to claim 1, special steel, high temperature alloy pipes is characterized in that: refractory material is selected zirconium English powder, schmigel, mullite powder for use.
3, the manufacture method of a kind of steel alloy according to claim 1, special steel, high temperature alloy pipes, it is characterized in that: bonding agent is selected Ludox, dextrin, polyvinyl alcohol for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96106513 CN1142420A (en) | 1996-06-14 | 1996-06-14 | Manufacture of alloy steel, special steel and high temperature alloy pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96106513 CN1142420A (en) | 1996-06-14 | 1996-06-14 | Manufacture of alloy steel, special steel and high temperature alloy pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1142420A true CN1142420A (en) | 1997-02-12 |
Family
ID=5119228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96106513 Pending CN1142420A (en) | 1996-06-14 | 1996-06-14 | Manufacture of alloy steel, special steel and high temperature alloy pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1142420A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093013C (en) * | 2000-03-17 | 2002-10-23 | 刘振凤 | Centrifugal pouring method of steel tube |
| CN101229578B (en) * | 2007-01-25 | 2010-07-07 | 湘潭高耐合金制造有限公司 | Fabricating technology of cylinder barrel for train |
| CN101829705A (en) * | 2010-05-25 | 2010-09-15 | 江苏双勤民生冶化设备制造有限公司 | Process for producing rising pipe in heat exchanging reforming furnace |
| CN102009158A (en) * | 2010-12-17 | 2011-04-13 | 四川海科机械制造有限公司 | Method for preventing cast-in steel pipe from being burnt and sintered |
| CN102101242A (en) * | 2009-12-17 | 2011-06-22 | 江苏双勤民生冶化设备制造有限公司 | Method for machining reformer tube |
| CN102240897A (en) * | 2011-05-09 | 2011-11-16 | 新兴铸管股份有限公司 | Method for manufacturing water-cooling type double-metal pipe die |
| CN102825697A (en) * | 2012-08-30 | 2012-12-19 | 江苏双达工程技术研究中心有限公司 | Processing technology of polyethylene grey pipeline |
| CN102847905A (en) * | 2012-09-14 | 2013-01-02 | 西安航空动力股份有限公司 | Centrifugal casting method of stainless steel sealing rings |
| CN103343261A (en) * | 2013-06-28 | 2013-10-09 | 江苏双勤民生冶化设备制造有限公司 | Centrifugal casting method for Inconel 600 alloy pipe |
| CN103861994A (en) * | 2013-12-23 | 2014-06-18 | 宁波钰烯阴极保护材料有限责任公司 | Coating for producing tubular high-silicon cast iron positive electrode and preparation method of coating |
| CN108098265A (en) * | 2017-12-13 | 2018-06-01 | 太原科技大学 | A kind of non-ferrous metal seamless shell production technology |
-
1996
- 1996-06-14 CN CN 96106513 patent/CN1142420A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093013C (en) * | 2000-03-17 | 2002-10-23 | 刘振凤 | Centrifugal pouring method of steel tube |
| CN101229578B (en) * | 2007-01-25 | 2010-07-07 | 湘潭高耐合金制造有限公司 | Fabricating technology of cylinder barrel for train |
| CN102101242A (en) * | 2009-12-17 | 2011-06-22 | 江苏双勤民生冶化设备制造有限公司 | Method for machining reformer tube |
| CN101829705A (en) * | 2010-05-25 | 2010-09-15 | 江苏双勤民生冶化设备制造有限公司 | Process for producing rising pipe in heat exchanging reforming furnace |
| CN102009158B (en) * | 2010-12-17 | 2012-06-27 | 四川海科机械制造有限公司 | Method for preventing cast-in steel pipe from being burnt and sintered |
| CN102009158A (en) * | 2010-12-17 | 2011-04-13 | 四川海科机械制造有限公司 | Method for preventing cast-in steel pipe from being burnt and sintered |
| CN102240897A (en) * | 2011-05-09 | 2011-11-16 | 新兴铸管股份有限公司 | Method for manufacturing water-cooling type double-metal pipe die |
| CN102825697A (en) * | 2012-08-30 | 2012-12-19 | 江苏双达工程技术研究中心有限公司 | Processing technology of polyethylene grey pipeline |
| CN102847905A (en) * | 2012-09-14 | 2013-01-02 | 西安航空动力股份有限公司 | Centrifugal casting method of stainless steel sealing rings |
| CN102847905B (en) * | 2012-09-14 | 2014-11-12 | 西安航空动力股份有限公司 | Centrifugal casting method of stainless steel sealing rings |
| CN103343261A (en) * | 2013-06-28 | 2013-10-09 | 江苏双勤民生冶化设备制造有限公司 | Centrifugal casting method for Inconel 600 alloy pipe |
| CN103343261B (en) * | 2013-06-28 | 2014-02-12 | 江苏双勤民生冶化设备制造有限公司 | Centrifugal casting method for Inconel 600 alloy pipe |
| CN103861994A (en) * | 2013-12-23 | 2014-06-18 | 宁波钰烯阴极保护材料有限责任公司 | Coating for producing tubular high-silicon cast iron positive electrode and preparation method of coating |
| CN103861994B (en) * | 2013-12-23 | 2016-03-02 | 宁波钰烯阴极保护材料有限责任公司 | For the production of the coating and preparation method thereof of high-silicon cast iron sheath |
| CN108098265A (en) * | 2017-12-13 | 2018-06-01 | 太原科技大学 | A kind of non-ferrous metal seamless shell production technology |
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