CN106493311A - The production method of high-temperature corrosion-resistant alloy electrode ingot - Google Patents
The production method of high-temperature corrosion-resistant alloy electrode ingot Download PDFInfo
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- CN106493311A CN106493311A CN201610989801.4A CN201610989801A CN106493311A CN 106493311 A CN106493311 A CN 106493311A CN 201610989801 A CN201610989801 A CN 201610989801A CN 106493311 A CN106493311 A CN 106493311A
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- metal pattern
- temperature corrosion
- production method
- resistant alloy
- electrode ingot
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to the production method of high-temperature corrosion-resistant alloy electrode ingot, belongs to special steel field of smelting.Present invention solves the technical problem that being to provide the production method of high-temperature corrosion-resistant alloy electrode ingot.The present invention adopts die casting, and the steel grade of electrode ingot is NS1402；By metal pattern reasonable in design, alloy pig body and riser gating technological parameter, and addition time and the weight of covering slag and exothermic mixture is formulated, the shrinkage cavity defect under NS1402 alloy rising heads is finally completely eliminated.The application of the present invention is stablized follow-up electroslag remelting production and there is important function for the alloy lumber recovery is improved.This method is simple, easy to operate, low production cost, it is adaptable to big production.
Description
Technical field
The present invention relates to the production method of high-temperature corrosion-resistant alloy electrode ingot, belongs to special steel field of smelting.
Background technology
NS1402 alloys are the stabilized Ni-Fe-Cr-Mo-Cu high-temperature corrosion-resistant alloys of one kind Ti.It has good resistance to
General corrosion and local corrosive nature, and good processing performance, the height in being mainly used in hydrogen cracking and residual hydrogenation equipment
Pressure air cooler material of main part, with compared with high added value.This high-temperature corrosion-resistant alloy is using molding side's ingot or slab ingot Direct Rolling plate
During material, easily crack, center porosity and the defect such as be mingled with.At present, mainly pass through to mold electrode bar, then electroslag remelting,
The mode for finally rolling is producing.Cool down through remelting wash heat and progressively, can obtain being mingled with less, and crackle and rarefaction defect
Low alloy bar material.
Existing high-temperature corrosion-resistant alloy electrode ingot by molding production also has a lot of problems.As central pipe depth compared with
Greatly, maximum can reach 1m；Shrinkage cavity radius is larger, more than 40mm.This big shrinkage cavity defect can have a strong impact on esr process electricity
Stablizing for pressure, is unfavorable for the direct motion of electroslag remelting process.Therefore need to cut off longer ingot casting under rising head, seriously reduce the conjunction
The lumber recovery of gold.
At present, there are numerous studies to report the pouring procedure of electrode ingot, such as Hu little Dong etc. to be published in《Special Processes of Metal Castings and coloured
Alloy》Document " simulation of slender electrode ingot coagulation defect ", for 45 steel, adjustment emits appearance than (from 5% to 10%), exothermic mixture
Consumption, and poring rate, optimize diameter 500mm, the internal soundness of high 4500mm electrodes ingot.
Liu Chuwei etc. is published in《Foundry engieering》In document " simulation of loose shrinkage cavity in the cast of Φ 450mm electrodes ingot is ground
Study carefully ", it is published in Solenognathus etc.《Special Processes of Metal Castings and non-ferrous alloy》Document " simulation of the Φ 450mm electrode ingot durations of pouring is ground
Study carefully ", and Zhang Zhen mountain etc. is published in《Foundry engieering》Document " based on Procast Φ 650mm electrode ingots casting program optimize
Research ", this three documents all pass through the duration of pouring for adjusting electrode ingot rising head and ingot body, optimize riser feeding, reduce electricity
Pole ingot shrinkage cavity depth.But the steel grade of document is 9Cr2Mo, has gross differences with high-temperature corrosion-resistant alloy.
The patent of invention of application number 201310174419.4 discloses a kind of pouring procedure of large-section consumable electrode, the skill
Art is primarily directed to tri- steel grades of S44SY, H13 and TSM166, devises a kind of method for pouring injecting electrode ingot, it is therefore an objective to reduce casting
Ingot is rolled or is forged into the operation of electrode ingot, and molten steel is directly poured into electrode ingot, reduces production cost.And for high temperature anti-corrosion
Alloy NS1402, can not prepare molding electrode well using the method.
Content of the invention
For the problems referred to above, present invention solves the technical problem that being to provide a kind of producer of high-temperature corrosion-resistant alloy electrode ingot
Method, the method are applied to the production of high-temperature corrosion-resistant alloy NS1402.
The production method of high-temperature corrosion-resistant alloy electrode ingot of the present invention, using die casting：
The steel grade of the electrode ingot is NS1402；
Ingot mould is metal pattern, and metal pattern internal diameter is up-small and down-big, 540～580mm of upper internal diameter, lower internal diameter 590～
630mm, taper 1～1.5%；Metal pattern 110～150mm of thickness suitable for reading, lower mouth thickness are 180～220mm；Metal pattern rising head is high
480～520mm, heat-insulating shield height 480～520mm, adiabatic 20～40mm of plate thickness；High 3500～the 4500mm of metal pattern；
Cast adopts bet method, and tapping temperature is 1480～1510 DEG C, and the ingot body duration of pouring is 810～870s, and rising head pours
The note time >=400s；
10～14kg/ of covering slag is added during cast, cast terminates to add 15～17kg/ of exothermic mixture, the dynamic model time 3.5
～4 hours.
Preferably, the metal pattern upper internal diameter 560mm, lower internal diameter 610mm, taper 1.25%；Metal pattern thickness suitable for reading
Degree 130mm, lower mouth thickness are 200mm；The high 500mm of metal pattern rising head, heat-insulating shield height 500mm, thickness 30mm；Metal pattern is high
4000mm.
Preferably, the riser gating time is 400～500s.
Further, preferably ingot body duration of pouring 840s, riser gating time 400s.
Preferably, covering slag 12kg/ is added, cast terminates to add exothermic mixture 16kg/, during dynamic model during cast
Between 3.7 hours.
Preferably, the addition concrete grammar of the covering slag is：Covering slag is suspended in metal pattern before cast, the bottom of apart from
80～120mm of portion；Preferred distance bottom 100mm.
The material of metal pattern of the present invention is preferably 30# steel.
Preferably, before pouring into a mould, metal pattern is toasted at least 2 hours.
The inventive method formulates alloy pig body and riser gating technological parameter, Yi Jibao by metal pattern reasonable in design
Shield slag and addition time and the weight of exothermic mixture, finally completely eliminate the shrinkage cavity defect under NS1402 alloy rising heads.The present invention
Application for the alloy lumber recovery is improved, stablize follow-up electroslag remelting production and there is important function.This method is simple, easy to be grasped
Make, low production cost, it is adaptable to big production.
Specific embodiment
The production method of high-temperature corrosion-resistant alloy electrode ingot of the present invention, using die casting：
The steel grade of the electrode ingot is NS1402；
Ingot mould is metal pattern, for the ease of by the deadweight of electrode ingot come the demoulding, metal pattern internal diameter be up-small and down-big, suitable for reading interior
540～580mm of footpath, 590～630mm of lower internal diameter, taper 1～1.5%；In order to slow down the setting rate on electrode ingot top, gold
Category mould 110～150mm of thickness suitable for reading, lower mouth thickness are 180～220mm；High 480～the 520mm of metal pattern rising head, heat-insulating shield height
480～520mm, adiabatic 20～40mm of plate thickness；High 3500～the 4500mm of metal pattern；
Cast adopts bet method, and tapping temperature is 1480～1510 DEG C, and liquid alloy is noted in from the ladle bottom mouth of a river
Pipe and mould bottom brick, enter from metal pattern bottom, and a disk can produce 6 ingot castings simultaneously.
In order to rising head region is realized preferably filling, deeper shrinkage cavity is prevented, the ingot body duration of pouring is 810～
870s, riser gating time >=400s；Poring rate can be controlled by slide plate aperture；
10～14kg/ of covering slag is added during cast, cast terminates to add 15～17kg/ of exothermic mixture, the dynamic model time 3.5
～4 hours.
Preferably, the metal pattern upper internal diameter 560mm, lower internal diameter 610mm, taper 1.25%；Metal pattern thickness suitable for reading
Degree 130mm, lower mouth thickness are 200mm；The high 500mm of metal pattern rising head, heat-insulating shield height 500mm, thickness 30mm；Metal pattern is high
4000mm, the metal pattern can produce the electrode ingot that weight is 7.85 tons.
Preferably, the riser gating time is 400～500s.
Further, preferably ingot body duration of pouring 840s, riser gating time 400s.
Preferably, covering slag 12kg/ is added, cast terminates to add exothermic mixture 16kg/, during dynamic model during cast
Between 3.7 hours.
Covering slag can be added at the cast initial stage, specific operation is：Covering slag is suspended in metal pattern before cast, distance
80～120mm of bottom, preferred distance bottom 100mm.
The material of metal pattern of the present invention is preferably 30# steel.
Preferably, before pouring into a mould, metal pattern is toasted at least 2 hours.
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
Embodiment 1
The present embodiment is deaerated using electric furnace smelting+LF stove refines+VOD, has been smelted stove NS1402 high-temperature corrosion-resistant alloys, has been adopted
Poured into a mould with 7.85 tons of electrode ingots.
Go out composition of steel as follows：
C 0.018%；Si 0.18%；Mn 0.3%；P 0.025%；S 0.015%；Cr 22.09%
Mo 3.17%；Cu 1.91%；Ti 1.2%；Fe 27.6%；Ni 43.37%；Al 0.12%
The material of metal pattern is 30# steel, and specification is as follows：
Specific requirement is as follows with step：
1490 DEG C of pouring temperature, 60 DEG C of metal pattern baking temperature, baking time 2h.
Covering slag (12kg/) is suspended in metal pattern before cast, apart from bottom 100mm；
Ingot body duration of pouring 840s, riser gating time 400s；Exothermic mixture 16kg/ is added at the end of riser gating, is moved
3.7 hours mould time.
Without shrinkage cavity defect under the electrode ingot rising head that the demoulding is obtained, electroslag remelting, electroslag remelting mistake are carried out using the electrode ingot
Voltage stabilization in journey, production are normal, final stocking superior in quality.
Embodiment 2
The molten steel composition and metal pattern of the present embodiment employing is with embodiment 1.
Specific requirement is as follows with step：
1510 DEG C of pouring temperature, 60 DEG C of metal pattern baking temperature, baking time 2h.
Covering slag (14kg/) is suspended in metal pattern before cast, apart from bottom 120mm；
Ingot body duration of pouring 810s, riser gating time 500s；Exothermic mixture 15kg/ is added at the end of riser gating, is moved
3.5 hours mould time.
Without shrinkage cavity defect under the electrode ingot rising head that the demoulding is obtained, electroslag remelting, electroslag remelting mistake are carried out using the electrode ingot
Voltage stabilization in journey, production are normal, final stocking superior in quality.
Embodiment 3
The molten steel composition and metal pattern of the present embodiment employing is with embodiment 1.
Specific requirement is as follows with step：
1480 DEG C of pouring temperature, 60 DEG C of metal pattern baking temperature, baking time 2h.
Covering slag (10kg/) is suspended in metal pattern before cast, apart from bottom 80mm；
Ingot body duration of pouring 870s, riser gating time 450s；Exothermic mixture 17kg/ is added at the end of riser gating, is moved
4 hours mould time.
Without shrinkage cavity defect under the electrode ingot rising head that the demoulding is obtained, electroslag remelting, electroslag remelting mistake are carried out using the electrode ingot
Voltage stabilization in journey, production are normal, final stocking superior in quality.
Claims (8)
1. the production method of high-temperature corrosion-resistant alloy electrode ingot, using die casting, it is characterised in that：
The steel grade of the electrode ingot is NS1402；
Ingot mould is metal pattern, and metal pattern internal diameter is up-small and down-big, 540～580mm of upper internal diameter, 590～630mm of lower internal diameter,
Taper 1～1.5%；Metal pattern 110～150mm of thickness suitable for reading, lower mouth thickness are 180～220mm；Metal pattern rising head is high by 480～
520mm, heat-insulating shield height 480～520mm, adiabatic 20～40mm of plate thickness；High 3500～the 4500mm of metal pattern；
Cast adopts bet method, and tapping temperature is 1480～1510 DEG C, and the ingot body duration of pouring is 810～870s, during riser gating
Between >=400s；
10～14kg/ of covering slag is added during cast, cast terminates to add 15～17kg/ of exothermic mixture, the dynamic model time 3.5～4
Hour.
2. the production method of high-temperature corrosion-resistant alloy electrode ingot according to claim 1, it is characterised in that：On the metal pattern
Mouth internal diameter 560mm, lower internal diameter 610mm, taper 1.25%；Metal pattern thickness 130mm suitable for reading, lower mouth thickness are 200mm；Metal
The high 500mm of mould rising head, heat-insulating shield height 500mm, thickness 30mm；The high 4000mm of metal pattern.
3. the production method of high-temperature corrosion-resistant alloy electrode ingot according to claim 1 and 2, it is characterised in that：Riser gating
Time is 400～500s.
4. the production method of high-temperature corrosion-resistant alloy electrode ingot according to claim 3, it is characterised in that：The ingot body duration of pouring
840s, riser gating time 400s.
5. the production method of the high-temperature corrosion-resistant alloy electrode ingot according to any one of Claims 1 to 4, it is characterised in that：Pour
Covering slag 12kg/ is added during note, cast terminates to add exothermic mixture 16kg/, 3.7 hours dynamic model time.
6. the production method of the high-temperature corrosion-resistant alloy electrode ingot according to any one of Claims 1 to 5, it is characterised in that：Institute
The addition concrete grammar for stating covering slag is：Covering slag is suspended in metal pattern before cast, apart from 80～120mm of bottom；It is preferred that
Apart from bottom 100mm.
7. the production method of the high-temperature corrosion-resistant alloy electrode ingot according to any one of Claims 1 to 5, it is characterised in that：Institute
The material for stating metal pattern is 30# steel.
8. the production method of the high-temperature corrosion-resistant alloy electrode ingot according to any one of claim 1～7, it is characterised in that：Pour
Before note, metal pattern is toasted at least 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989801.4A CN106493311A (en) | 2016-11-10 | 2016-11-10 | The production method of high-temperature corrosion-resistant alloy electrode ingot |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610989801.4A CN106493311A (en) | 2016-11-10 | 2016-11-10 | The production method of high-temperature corrosion-resistant alloy electrode ingot |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014085A (en) * | 2018-09-11 | 2018-12-18 | 安徽富凯特材有限公司 | A kind of pouring procedure of titanium alloy steel ingot |
| CN109226702A (en) * | 2018-10-23 | 2019-01-18 | 成都先进金属材料产业技术研究院有限公司 | The method for improving 40Cr13 static ingot internal soundness |
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| JPH10211546A (en) * | 1997-01-27 | 1998-08-11 | Hitachi Metals Ltd | Hot-top casting method |
| CN101274356A (en) * | 2008-05-16 | 2008-10-01 | 山西太钢不锈钢股份有限公司 | Dead-melted steel ingot and mold and casting method thereof |
| CN103231029A (en) * | 2013-05-13 | 2013-08-07 | 山西太钢不锈钢股份有限公司 | Pouring method for large-section consumable electrode |
| CN103252461A (en) * | 2013-05-13 | 2013-08-21 | 山西太钢不锈钢股份有限公司 | Method for pouring electrode billet |
| CN104195348A (en) * | 2014-09-18 | 2014-12-10 | 刘天成 | Low-silicon and low-impurity pre-melting slag for electro-slag remelting and preparing method and application thereof |
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2016
- 2016-11-10 CN CN201610989801.4A patent/CN106493311A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10211546A (en) * | 1997-01-27 | 1998-08-11 | Hitachi Metals Ltd | Hot-top casting method |
| CN101274356A (en) * | 2008-05-16 | 2008-10-01 | 山西太钢不锈钢股份有限公司 | Dead-melted steel ingot and mold and casting method thereof |
| CN103231029A (en) * | 2013-05-13 | 2013-08-07 | 山西太钢不锈钢股份有限公司 | Pouring method for large-section consumable electrode |
| CN103252461A (en) * | 2013-05-13 | 2013-08-21 | 山西太钢不锈钢股份有限公司 | Method for pouring electrode billet |
| CN104195348A (en) * | 2014-09-18 | 2014-12-10 | 刘天成 | Low-silicon and low-impurity pre-melting slag for electro-slag remelting and preparing method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014085A (en) * | 2018-09-11 | 2018-12-18 | 安徽富凯特材有限公司 | A kind of pouring procedure of titanium alloy steel ingot |
| CN109226702A (en) * | 2018-10-23 | 2019-01-18 | 成都先进金属材料产业技术研究院有限公司 | The method for improving 40Cr13 static ingot internal soundness |
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