CN109735725A - A kind of stainless steel ESR ingot remelting method - Google Patents
A kind of stainless steel ESR ingot remelting method Download PDFInfo
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- CN109735725A CN109735725A CN201910213282.6A CN201910213282A CN109735725A CN 109735725 A CN109735725 A CN 109735725A CN 201910213282 A CN201910213282 A CN 201910213282A CN 109735725 A CN109735725 A CN 109735725A
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Abstract
The invention discloses a kind of stainless steel ESR ingot remelting method, including selected equipment, slag making, remelting, exchange and feeding and etc..The present invention uses this steel grade heelpiece, the remelting processing that Ti matter striking agent and the direct starting the arc of consutrode combine, component segregation problem caused by can effectively reducing because of Electrode composition tolerances, reasonable coordination electrode fills spacing, avoid the higher problem of melting rate caused by electrode length leg phenomenon, melting rate is set to be reduced to 1.5-3t/h by 3-4t/h, significantly improve ingot solidification quality, unit product electricity consumption of the present invention is low, close to coaxial conductive electroslag furnace power consumption levels, effectively reduce energy consumption, stainless steel ESR ingot intensity prepared by the present invention is high, good toughness, crystal grain is low and balanced, the high-end fields such as nuclear power can be met uses steel demand.
Description
Technical field
The present invention relates to electroslag remelting technique field more particularly to a kind of stainless steel ESR ingot remelting methods.
Background technique
Nuclear power technology is the technology of the energy power generation discharged using nuclear fission or nuclear fusion reaction.Nuclear reactor and its attached
The safety for belonging to equipment has high requirement.In nuclear power technology using to the preparation of metal product be also different from common metal
Product, the indexs such as intensity, toughness, cleanliness, crystallite dimension and corrosion resistance are above common metal product.Electroslag remelting skill
Art can purify metals and high performance steel ingot is made, and steel ingot obtained is with high purity, sulfur-bearing is low, non-metallic inclusion is few, steel ingot table
Face is smooth, clean even compact, metallographic structure and chemical component it is uniform, as cast condition mechanical performance is more than the index with steel grade forging,
It is the preferred method for preparing nuclear power technology steel part material.But existing electroslag remelting process power consumption is larger, especially big ruler
The preparation of very little ESR ingot, the melting time is long, energy consumption height and low efficiency.
Summary of the invention
The present invention problem low for existing electroslag remelting technique energy consumption high efficiency, provides a kind of stainless steel ESR ingot remelting
Method.
The technical scheme to solve the above technical problems is that a kind of stainless steel ESR ingot remelting method, feature
It is, includes the following steps:
1) selected equipment: a, using three-phase bipolar series electroslag remelting furnace, with this steel grade heelpiece in remelting furnace；B, using electricity
Arc furnace+AOD furnace production consutrode；C, using copper wall water mold, crystallizer diameter is about 1600-2300mm；
2) slag making: assembly pre-melted slag uses Ti matter striking agent, the direct starting the arc of consutrode；
3) remelting: coordination electrode fills spacing, and electrode exchange alternates by the way of exchange using three, in every group of exchange process
There is two-phase to be in normal remelting state, six electrodes of three-phase bipolar series electroslag furnace are uniformly distributed；
4) it exchanges: being lifted simultaneously using bipolar electrode, swap time 4-6min；
5) feeding: carrying out feeding using small electrode, and decreasing power is welded using bias, guarantees that electrode filling spacing is constant, mends
Contracting amount >=5t.
Wherein, step 3) electrode filling area ratio is 0.2-0.35, and Melting rate control is in 1.5-3t/h；Step 5) electrode
Filling area ratio is 0.1-0.2, and Melting rate control is in 0.5-2.5t/h.Stainless steel ESR ingot intensity obtained by this method is 520-
550MPa, grain size are 2.7-3.0 grades, and electricity consumption is 1300-1400 KWhs/ton.
The beneficial effects of the present invention are: the present invention is directly risen using this steel grade heelpiece, Ti matter striking agent and consutrode
The remelting processing that arc combines, component segregation problem caused by can effectively reducing because of Electrode composition tolerances；Rationally control electricity
Spacing is filled in pole, avoids the higher problem of melting rate caused by electrode length leg phenomenon, drops melting rate by 3-4t/h
As low as 1.5-3t/h, ingot solidification quality is significantly improved；Unit product electricity consumption of the present invention is low, close to coaxial conductive electroslag furnace function
Water consumption is flat, effectively reduces energy consumption.Stainless steel ESR ingot intensity height prepared by the present invention, good toughness, crystal grain are low and balanced, can expire
Use steel demand in the high-end fields such as sufficient nuclear power.
Specific embodiment
Below in conjunction with example, present invention is described, and the given examples are served only to explain the present invention, is not intended to limit this
The range of invention.
Embodiment 1
A kind of stainless steel ESR ingot remelting method, includes the following steps: 1) selected equipment: a, using three-phase bipolar series electricity
Slag remelting furnace, with this steel grade heelpiece in remelting furnace；B, using electric arc furnaces+AOD furnace production consutrode；C, using copper wall water cooling
Crystallizer, crystallizer diameter are about 2300mm；2) slag making: assembly pre-melted slag, using Ti matter striking agent, consutrode is directly risen
Arc；3) remelting: coordination electrode filling area ratio is 0.35, and electrode exchange alternates by the way of exchange using three, and every group exchanged
Cheng Zhongjun has two-phase to be in normal remelting state, and six electrodes of three-phase bipolar series electroslag furnace are uniformly distributed, Melting rate control
In 3t/h；4) it exchanges: being lifted simultaneously using bipolar electrode, swap time 6min；5) feeding: feeding is carried out using small electrode, is passed
Subtract power, welded using bias, guarantees electrode filling spacing but electrode filling area is than near 0.2, Melting rate control is in 2.5t/
H, feeding amount 8t, it is 529MPa that stainless steel ESR ingot intensity, which is made, and grain size is 2.7 grades, 1300 KWhs/ton of electricity consumption.
Embodiment 2
A kind of stainless steel ESR ingot remelting method, includes the following steps: 1) selected equipment: a, using three-phase bipolar series electricity
Slag remelting furnace, with this steel grade heelpiece in remelting furnace；B, using electric arc furnaces+AOD furnace production consutrode；C, using copper wall water cooling
Crystallizer, crystallizer diameter are about 1600mm；2) slag making: assembly pre-melted slag, using Ti matter striking agent, consutrode is directly risen
Arc；3) remelting: coordination electrode filling area ratio is 0.2, and electrode exchange alternates by the way of exchange using three, every group of exchange process
In there is two-phase to be in normal remelting state, six electrodes of three-phase bipolar series electroslag furnace are uniformly distributed, and Melting rate control exists
1.5t/h；4) it exchanges: being lifted simultaneously using bipolar electrode, swap time 4-6min；5) feeding: carrying out feeding using small electrode,
Decreasing power is welded using bias, guarantees electrode filling spacing but electrode filling area is than near 0.1, Melting rate control exists
0.5t/h, feeding amount 5t, it is 540MPa that stainless steel ESR ingot intensity, which is made, and grain size is 3.0 grades, 1400 KWhs/ton of electricity consumption.
1. Examples 1 and 2 ESR ingot of table and conventional stainless steel performance comparison
Table 1 is Examples 1 and 2 ESR ingot and conventional stainless steel performance comparison, as can be seen from the table, using this hair
Each performance indicator of stainless steel ESR ingot of bright the method preparation is above conventional stainless steel.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of stainless steel ESR ingot remelting method, which comprises the steps of:
1) selected equipment: a, using three-phase bipolar series electroslag remelting furnace, with this steel grade heelpiece in remelting furnace；B, using electric arc furnaces
The consutrode of+AOD furnace production；C, using copper wall water mold, crystallizer diameter is about 1600-2300mm；
2) slag making: assembly pre-melted slag uses Ti matter striking agent, the direct starting the arc of consutrode；
3) remelting: coordination electrode fills spacing, and electrode exchange alternates by the way of exchange using three, has in every group of exchange process
Two-phase is in normal remelting state, and six electrodes of three-phase bipolar series electroslag furnace are uniformly distributed；
4) it exchanges: being lifted simultaneously using bipolar electrode, swap time 4-6min；
5) feeding: carrying out feeding using small electrode, and decreasing power is welded using bias, guarantees that electrode filling spacing is constant, feeding amount
≥5t。
2. stainless steel ESR ingot remelting method according to claim 1, which is characterized in that step 3) electrode filling area ratio
For 0.2-0.35, Melting rate control is in 1.5-3t/h.
3. stainless steel ESR ingot remelting method according to claim 1, which is characterized in that step 5) electrode filling area ratio
For 0.1-0.2, Melting rate control is in 0.5-2.5t/h.
4. stainless steel ESR ingot remelting method according to claim 1-3, which is characterized in that gained stainless steel electricity
Slag ingot intensity is 520-550MPa, and grain size is 2.7-3.0 grades.
5. stainless steel ESR ingot remelting method according to claim 1-3, which is characterized in that the method electricity consumption
Amount is 1300-1400 KWhs/ton.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586903A (en) * | 2019-10-29 | 2019-12-20 | 沈阳铸造研究所有限公司 | Electroslag remelting center feeding method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101396728A (en) * | 2007-09-28 | 2009-04-01 | 上海重型机器厂有限公司 | Manufacture method of steel ingot for million multikilowatt nuclear electricity pile core component |
-
2019
- 2019-03-20 CN CN201910213282.6A patent/CN109735725A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101396728A (en) * | 2007-09-28 | 2009-04-01 | 上海重型机器厂有限公司 | Manufacture method of steel ingot for million multikilowatt nuclear electricity pile core component |
Non-Patent Citations (1)
| Title |
|---|
| 《李正邦文集》编委会: "《李正邦文集》", 31 May 2014, 北京：冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586903A (en) * | 2019-10-29 | 2019-12-20 | 沈阳铸造研究所有限公司 | Electroslag remelting center feeding method |
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