CN115612783B - Method for eliminating surface wave defect of nitrogen-containing high alloy steel cold roll - Google Patents
Method for eliminating surface wave defect of nitrogen-containing high alloy steel cold roll Download PDFInfo
- Publication number
- CN115612783B CN115612783B CN202211327878.7A CN202211327878A CN115612783B CN 115612783 B CN115612783 B CN 115612783B CN 202211327878 A CN202211327878 A CN 202211327878A CN 115612783 B CN115612783 B CN 115612783B
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- percent
- vacuum degassing
- alloy steel
- surface wave
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910000851 Alloy steel Inorganic materials 0.000 title claims abstract description 22
- 230000007547 defect Effects 0.000 title claims abstract description 22
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 27
- 238000005242 forging Methods 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003247 decreasing effect Effects 0.000 claims abstract description 5
- 238000007670 refining Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims abstract description 3
- 238000001816 cooling Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 13
- 238000001514 detection method Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for eliminating surface wave defects of a nitrogen-containing high alloy steel cold roll, which comprises smelting electroslag ingot blanks and forging roll blanks; the smelting electroslag ingot blank comprises electric furnace smelting, external refining, vacuum degassing, electrode rod casting and electroslag remelting; aluminum deoxidization is further carried out before vacuum degassing, wherein the vacuum degassing is carried out under the vacuum degree of 10-30 Pa, nitrogen is added in FeCrN modes after the vacuum degassing, and the electroslag remelting adopts a mode of low current, high voltage and gradually decreasing voltage. According to the method, aluminum deoxidation is carried out before vacuum degassing, vacuum degassing is carried out under a higher vacuum degree, nitrogen is added in FeCrN modes after vacuum degassing, and electroslag remelting adopts a mode of low current, high voltage and gradually decreasing voltage, so that the surface wave defect of the nitrogen-containing high alloy steel cold roll can be eliminated.
Description
Technical Field
The invention belongs to the technical field of nitrogen-containing high alloy steel cold rolls, and particularly relates to a method for eliminating surface wave defects of a nitrogen-containing high alloy steel cold roll.
Background
With the rapid development of the steel industry, the quality requirements for steel plates are becoming more stringent, as are the quality requirements for cold rolls. Surface wave detection is a detection means which is increasingly popular, and under the roughness of Ra1.0, domestic high-end customers basically require that no reflection echo can be used for surface wave detection. Surface wave defects are generally characterized by local inclusions, pores, segregation, carbides and the like, and are complex in cause, particularly as the alloy content of the roller is increased, the control difficulty is greater.
The nitrogen-containing high alloy steel cold roll is a high alloy cold roll with better use effect at present due to the nitrogen strengthening effect, but the cold roll has higher alloy content, is easy to segregate, and has difficult control of nitrogen content, so that the surface wave defect is more likely to occur in the material, and the surface wave defect becomes a great constraint for restricting the popularization of new materials, especially high alloy steel materials.
Disclosure of Invention
The invention aims to solve the problems and provide a method for eliminating surface wave defects of a nitrogen-containing high alloy steel cold roll.
The technical scheme for realizing the aim of the invention is as follows: a method for eliminating surface wave defects of a nitrogen-containing high alloy steel cold roll comprises smelting electroslag ingot blanks and forging roll blanks; the smelting electroslag ingot blank comprises electric furnace smelting, external refining, vacuum degassing, electrode rod casting and electroslag remelting; the vacuum degassing is preceded by aluminum deoxidation and ensures that the residual aluminum content in the electrode blank is 0.04-0.08%.
The nitrogen-containing high alloy steel cold roll comprises the following chemical components in percentage by weight: 0.60 to 0.80 percent of carbon, 0.70 to 0.90 percent of silicon, 0.25 to 0.65 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 4.50 to 5.50 percent of chromium, less than or equal to 0.25 percent of nickel, 0.04 to 0.10 percent of nitrogen, 0.80 to 1.20 percent of molybdenum, 0.20 to 0.80 percent of vanadium, and the balance of iron and unavoidable impurities.
The vacuum degassing is carried out under the vacuum degree of 10-30 Pa; the vacuum degassing time is 20-40 min; the vacuum degassing is required to ensure that the hydrogen content in the electrode blank is less than or equal to 1.2ppm and the oxygen content is less than or equal to 15ppm.
After the vacuum degassing, feCrN is added into the ladle, the ladle is heated, stirring is continued for more than 20 minutes in an argon atmosphere, and the nitrogen content is controlled to be 400-1000 ppm.
The slag system adopted by the electroslag remelting comprises the following components: 40 to 60 weight percent of CaF 2, 20 to 40 weight percent of Al 2O3 and 15 to 25 weight percent of CaO.
The electroslag remelting firstly remelts the roll neck section at a first melting speed, then remelts the roll body section at a second melting speed, and finally remelts the roll neck section at the other end at the first melting speed.
The first melt rate is related to the crystallizer diameter; the following formula is specifically satisfied: first melting rate=0.65 to 0.75D Knot(s) in kg/h.
Wherein: d Knot(s) is the number of the diameter unit of the crystallizer in mm (hereinafter the same applies).
The second melt rate is related to the crystallizer diameter; the following formula is specifically satisfied: second melting rate=0.80 to 0.85D Knot(s) in kg/h.
The electroslag remelting adopts a mode of low current, high voltage and gradually decreasing voltage.
Wherein: the current is related to the crystallizer diameter; the following formula is specifically satisfied: current = 20D Knot(s) -5000 in a.
The voltage is controlled to be 80-90V by a magnetic regulating transformer.
The forging roller blank specifically comprises the following steps: homogenizing at 1200-1230 deg.c; then pre-drawing is carried out; the single-side rolling reduction of the pre-drawing is 20-30 mm; then adopting a two-upsetting two-drawing forging process, and drawing an upper V-shaped anvil and a lower V-shaped anvil; finally, performing heat treatment after forging.
The specific method for the heat treatment after forging is as follows: and (3) cooling to 500-550 ℃ by adopting an axial spray cooling mode (to avoid forming netlike carbide), charging for normalizing, heating to 1000-1030 ℃, discharging, cooling to 500-550 ℃ by spraying, charging for spheroidizing annealing, cooling to 700-750 ℃ by 10-30 ℃/h after heating to 800-920 ℃, slowly cooling to 300-400 ℃ after heat preservation, and carrying out rough machining after discharging to obtain a roller blank.
The invention has the positive effects that:
(1) The invention carries out aluminum deoxidation before vacuum degassing, and ensures that a certain content of aluminum remains in the electrode blank, thus the continuous deoxidation effect can be realized in the subsequent electroslag remelting, thereby obviously controlling the content of inclusions and eliminating surface wave defects.
(2) The vacuum degassing is performed under a high vacuum degree (10-30 Pa), so that the hydrogen content in the electrode blank can be controlled to be less than 1.2ppm, the oxygen content can be controlled to be less than 15ppm, thereby inhibiting the generation of air holes and further eliminating surface wave defects.
(3) The method of the invention increases nitrogen in FeCrN form after vacuum degassing, which not only can effectively control nitrogen content, but also can avoid the influence of nitrogen on surface wave defects.
(4) The forging method can break the liquid-out carbide in the steel to the maximum extent, ensure that the surface layer of the roller blank has no large liquid-out carbide, ensure the central compaction to the maximum extent, ensure that the internal low-power punctiform segregation is less than or equal to 1.0 level, and ensure that the high-power tissue liquid-out is less than or equal to 1.0 level, and the general looseness is less than or equal to 2.0 level.
(5) The electroslag remelting adopts a mode of low current, high voltage and gradually decreasing voltage, so that the surface wave defect can be further eliminated.
Detailed Description
Example 1
The nitrogen-containing high alloy steel cold roll of the embodiment comprises the following chemical components in percentage by weight: carbon 0.70%, silicon 0.80%, manganese 0.45%, phosphorus not more than 0.020%, sulfur not more than 0.010%, chromium 5.00%, nickel not more than 0.25%, nitrogen 0.06-0.08%, molybdenum 1.00%, vanadium 0.50%, and the balance of iron and unavoidable impurities.
The method for eliminating the surface wave defect of the nitrogen-containing high alloy steel cold roll in the embodiment comprises the following steps:
s1: smelting electroslag ingot blanks.
S11: and (5) adopting an alkaline electric furnace to perform electric furnace smelting, and then performing external refining.
S12: aluminum deoxidization is carried out before vacuum degassing, and the residual aluminum content in the electrode blank is ensured to be 0.04-0.08%, so as to ensure continuous deoxidization in the subsequent electroslag remelting.
The vacuum degassing is carried out for 30min under the vacuum degree of 20Pa, so that the hydrogen content in the electrode blank is less than or equal to 1.2ppm, and the oxygen content is less than or equal to 15ppm.
After vacuum degassing, feCrN is added into the ladle, heated, and continuously stirred for more than 20 minutes in an argon atmosphere, and the nitrogen content is controlled to be 600-800 ppm.
S13: and (5) pouring an electrode rod.
S14: electroslag remelting.
The slag system adopted in the embodiment comprises the following components: 50wt% CaF 2, 30wt% Al 2O3 and 20wt% CaO.
The diameter of the crystallizer used in this example was 800mm.
In the electroslag remelting process, the roll neck section remelting is firstly carried out at a first melting speed of 560+/-5 kg/h, then the roll body section remelting is carried out at a second melting speed of 660+/-5 kg/h, and finally the roll neck section remelting at the other end is carried out at the first melting speed of 560+/-5 kg/h.
In the electroslag remelting process, the current is stabilized at 11000A, the voltage at the initial stage of remelting is 90V, and the voltage is gradually reduced to 80V before the subsequent remelting until feeding.
S2: forging a roller blank.
S21: high temperature homogenization is first performed at 1215.+ -. 5 ℃.
S22: and then pre-drawing is carried out to eliminate bubbles under the skin of the electroslag ingot, wherein the single-side reduction of the pre-drawing is 25mm.
S23: then adopting a two-upsetting two-drawing forging process, and drawing an upper V-shaped anvil and a lower V-shaped anvil.
S24: heat treatment after forging:
And (3) cooling to 525+/-5 ℃ by adopting an axial spray cooling mode (to avoid forming a netlike carbide), charging for normalizing, heating to 1015+/-5 ℃, discharging, cooling to 525+/-5 ℃ by spraying, charging for spheroidizing annealing, cooling to 725+/-5 ℃ by 20 ℃/h, preserving heat, slowly cooling to 350+/-5 ℃ and discharging for rough machining to obtain a roller blank.
Example 2 to example 5
The method of each example is essentially the same as example 1, except for the weight percentages of the partial chemical components and the electroslag remelting process, as shown in table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Carbon (C) | 0.70% | 0.70% | 0.70% | 0.65% | 0.75% |
| Silicon (Si) | 0.80% | 0.80% | 0.80% | 0.75% | 0.85% |
| Manganese (Mn) | 0.45% | 0.45% | 0.45% | 0.35% | 0.45% |
| Chromium (Cr) | 5.00% | 5.00% | 5.00% | 4.80% | 5.20% |
| Molybdenum (Mo) | 1.00% | 1.00% | 1.00% | 0.90% | 1.10% |
| Vanadium (V) | 0.50% | 0.50% | 0.50% | 0.35% | 0.65% |
| Crystallizer diameter | 800mm | 680mm | 900mm | 800mm | 800mm |
| First melting speed | 560±5kg/h | 475±5kg/h | 630±5kg/h | 560±5kg/h | 560±5kg/h |
| Second melting speed | 660±5kg/h | 560±5kg/h | 740±5kg/h | 660±5kg/h | 660±5kg/h |
| Electric current | 11000A | 8600A | 13000A | 11000A | 11000A |
Comparative example 1
The method of this comparative example differs from example 1 in that: no aluminum deoxygenation was performed prior to vacuum degassing.
Comparative example 2
The method of this comparative example differs from example 1 in that: vacuum degassing was carried out at a vacuum degree of 100Pa for 30min.
Comparative example 3
The method of this comparative example differs from example 1 in that: nitrogen is added in gaseous form.
Comparative example 4
The method of this comparative example differs from example 1 in that: the electroslag remelting adopts high current 20000A and low voltage 60V, and the current and the voltage are constant.
(Test case)
The nitrogen-containing high alloy steel roll blanks obtained in each example and each comparative example were prepared into nitrogen-containing high alloy steel cold rolls according to a conventional process, and surface wave detection was performed, and the results are shown in table 2.
TABLE 2
| Surface wave defect | |
| Example 1 | Without any means for |
| Example 2 | Without any means for |
| Example 3 | Without any means for |
| Example 4 | Without any means for |
| Example 5 | Without any means for |
| Comparative example 1 | Has the following components |
| Comparative example 2 | Has the following components |
| Comparative example 3 | Has the following components |
| Comparative example 4 | Has the following components |
Claims (6)
1. A method for eliminating surface wave defects of a nitrogen-containing high alloy steel cold roll comprises smelting electroslag ingot blanks and forging roll blanks; the smelting electroslag ingot blank comprises electric furnace smelting, external refining, vacuum degassing, electrode rod casting and electroslag remelting; the method is characterized in that: the vacuum degassing is preceded by aluminum deoxidation, and the residual aluminum content in the electrode blank is ensured to be 0.04-0.08%;
The vacuum degassing is carried out under the vacuum degree of 10-30 Pa; the vacuum degassing time is 20-40 min; the vacuum degassing is required to ensure that the hydrogen content in the electrode blank is less than or equal to 1.2ppm and the oxygen content is less than or equal to 15ppm;
Adding FeCrN to a ladle after vacuum degassing, heating, and continuously stirring for more than 20 minutes in an argon atmosphere to control the nitrogen content to be 400-1000 ppm;
the nitrogen-containing high alloy steel cold roll comprises the following chemical components in percentage by weight: 0.60 to 0.80 percent of carbon, 0.70 to 0.90 percent of silicon, 0.25 to 0.65 percent of manganese, less than or equal to 0.020 percent of phosphorus, less than or equal to 0.010 percent of sulfur, 4.50 to 5.50 percent of chromium, less than or equal to 0.25 percent of nickel, 0.04 to 0.10 percent of nitrogen, 0.80 to 1.20 percent of molybdenum, 0.20 to 0.80 percent of vanadium, and the balance of iron and unavoidable impurities.
2. The method for eliminating surface wave defects of nitrogen-containing high alloy steel cold roll according to claim 1, wherein the method comprises the steps of: the electroslag remelting adopts a mode of low current, high voltage and gradually decreasing voltage; the voltage is controlled to be 80-90V by adopting a magnetic regulating transformer; the current=20d Knot(s) -5000, the unit is a; the D Knot(s) is the diameter of the crystallizer, and the unit is a numerical value of mm.
3. The method for eliminating surface wave defects of nitrogen-containing high alloy steel cold roll according to claim 2, wherein the method comprises the steps of: the electroslag remelting firstly remelts the roll neck section at a first melting speed, then remelts the roll body section at a second melting speed, and finally remelts the roll neck section at the other end at the first melting speed; the first melting speed=0.65-0.75D Knot(s) , and the second melting speed=0.80-0.85D Knot(s) , the unit is kg/h.
4. The method for eliminating surface wave defects of nitrogen-containing high alloy steel cold roll according to claim 2, wherein the method comprises the steps of: the slag system adopted by the electroslag remelting comprises the following components: 40 to 60 weight percent of CaF 2, 20 to 40 weight percent of Al 2O3 and 15 to 25 weight percent of CaO.
5. The method for eliminating surface wave defects of nitrogen-containing high alloy steel cold roll according to claim 1, wherein the method comprises the steps of: the forging roller blank specifically comprises the following steps: homogenizing at 1200-1230 deg.c; then pre-drawing is carried out; the single-side rolling reduction of the pre-drawing is 20-30 mm; then adopting a two-upsetting two-drawing forging process, and drawing an upper V-shaped anvil and a lower V-shaped anvil; finally, performing heat treatment after forging.
6. The method for eliminating surface wave defects of nitrogen-containing high alloy steel cold roll according to claim 5, wherein the method comprises the steps of: the specific method for the heat treatment after forging is as follows: cooling to 500-550 ℃ by adopting an axial spray cooling mode, charging for normalizing, heating to 1000-1030 ℃, discharging, spraying for cooling to 500-550 ℃, charging for spheroidizing annealing, cooling to 700-750 ℃ by 10-30 ℃/h after heating to 800-920 ℃, slowly cooling to 300-400 ℃ after heat preservation, and carrying out rough machining after discharging to obtain a roller blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211327878.7A CN115612783B (en) | 2022-10-27 | 2022-10-27 | Method for eliminating surface wave defect of nitrogen-containing high alloy steel cold roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211327878.7A CN115612783B (en) | 2022-10-27 | 2022-10-27 | Method for eliminating surface wave defect of nitrogen-containing high alloy steel cold roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115612783A CN115612783A (en) | 2023-01-17 |
| CN115612783B true CN115612783B (en) | 2024-06-07 |
Family
ID=84876307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211327878.7A Active CN115612783B (en) | 2022-10-27 | 2022-10-27 | Method for eliminating surface wave defect of nitrogen-containing high alloy steel cold roll |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115612783B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644026A (en) * | 2011-02-22 | 2012-08-22 | 宝山钢铁股份有限公司 | Cold roll and manufacturing method thereof |
| KR101516724B1 (en) * | 2013-10-30 | 2015-05-04 | 현대제철 주식회사 | Method for manufacturing non-normalized steel of possible assurance nitrogen component |
| CN106282750A (en) * | 2016-09-20 | 2017-01-04 | 北京科技大学 | A kind of improve the method for carbide in electroslag remelting mould steel |
| CN112981128A (en) * | 2021-02-07 | 2021-06-18 | 成都先进金属材料产业技术研究院股份有限公司 | Smelting method of electrode bar base material for non-protective atmosphere electroslag remelting H13 steel |
-
2022
- 2022-10-27 CN CN202211327878.7A patent/CN115612783B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644026A (en) * | 2011-02-22 | 2012-08-22 | 宝山钢铁股份有限公司 | Cold roll and manufacturing method thereof |
| KR101516724B1 (en) * | 2013-10-30 | 2015-05-04 | 현대제철 주식회사 | Method for manufacturing non-normalized steel of possible assurance nitrogen component |
| CN106282750A (en) * | 2016-09-20 | 2017-01-04 | 北京科技大学 | A kind of improve the method for carbide in electroslag remelting mould steel |
| CN112981128A (en) * | 2021-02-07 | 2021-06-18 | 成都先进金属材料产业技术研究院股份有限公司 | Smelting method of electrode bar base material for non-protective atmosphere electroslag remelting H13 steel |
Non-Patent Citations (1)
| Title |
|---|
| 32Cr3Mo1V钢铸轧辊套的生产试制;赵俊民;孙秀春;;大型铸锻件(02);第39-40、43页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115612783A (en) | 2023-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110157988B (en) | Steel alloy material for high-purity homogeneous rare earth cold roll and preparation method thereof | |
| CN102517521B (en) | MnCr carburized gear steel and its production method | |
| CN111286671B (en) | Ultra-pure high-temperature fine-grain gear steel, manufacturing method and application thereof | |
| CN108251747B (en) | Steel pipe for crane boom and manufacturing method thereof | |
| CN114015936B (en) | High-nitrogen gear steel and preparation method thereof | |
| CN111118257A (en) | Heat treatment method for improving impact toughness of boron-containing thick hydroelectric steel plate core | |
| CN115612783B (en) | Method for eliminating surface wave defect of nitrogen-containing high alloy steel cold roll | |
| CN117210771B (en) | Thick high-performance nitrogen-containing austenitic stainless steel for nuclear power and manufacturing method thereof | |
| CN108531828A (en) | Medium caliber heavy wall low temperature seamless steel pipe, its manufacturing method and application | |
| CN112877587A (en) | Method for smelting high-manganese TWIP steel by adopting electric arc furnace and ladle refining furnace | |
| CN115094307B (en) | Hot die steel continuous casting round billet for electroslag remelting and production process thereof | |
| CN113604736B (en) | High-strength medium plate with yield strength of 800MPa and preparation method thereof | |
| CN113604734A (en) | Ultra-thick gauge low residual stress forklift steel and preparation method thereof | |
| CN113564449A (en) | Semi-steel smelting method of phosphorus-containing high-strength IF steel | |
| CN115156493B (en) | Method for producing large-specification high-density round steel by continuous casting billet | |
| CN116145017B (en) | Production method of high-toughness wear-resistant steel plate with uniform hardness in thickness direction | |
| CN115323268B (en) | Gear steel with high strength and high toughness and capable of being used for induction quenching and manufacturing method thereof | |
| CN114645190B (en) | ASTM4130 steel and production method thereof | |
| CN114807759B (en) | New energy automobile gear box bearing steel material and manufacturing method thereof | |
| CN117604380A (en) | Gao Jiangyi welded 700MPa steel plate and manufacturing method and application thereof | |
| CN116875907A (en) | Ultra-wide duplex stainless steel medium plate and manufacturing method thereof | |
| CN116676542A (en) | Chromium-nitrogen microalloyed medium-carbon manganese steel for gas cylinders and preparation method thereof | |
| CN116623081A (en) | High-carbon alloy steel, preparation method thereof and application thereof in saw blade tool | |
| CN116219293A (en) | Super-thick and super-high-power steel for hydroelectric engineering and manufacturing method thereof | |
| CN116623084A (en) | Vanadium-nitrogen microalloyed medium-carbon manganese steel for gas cylinders and preparation method thereof |
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 | ||
| GR01 | Patent grant |