KR102171694B1 - 방향성 전기강판 및 그의 제조방법 - Google Patents
방향성 전기강판 및 그의 제조방법 Download PDFInfo
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- KR102171694B1 KR102171694B1 KR1020180160910A KR20180160910A KR102171694B1 KR 102171694 B1 KR102171694 B1 KR 102171694B1 KR 1020180160910 A KR1020180160910 A KR 1020180160910A KR 20180160910 A KR20180160910 A KR 20180160910A KR 102171694 B1 KR102171694 B1 KR 102171694B1
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- 229910001224 Grain-oriented electrical steel Inorganic materials 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 40
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 40
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 25
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 229910052718 tin Inorganic materials 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 10
- 238000000137 annealing Methods 0.000 claims description 82
- 238000001953 recrystallisation Methods 0.000 claims description 79
- 238000010438 heat treatment Methods 0.000 claims description 64
- 239000000463 material Substances 0.000 claims description 56
- 230000001590 oxidative effect Effects 0.000 claims description 49
- 238000000034 method Methods 0.000 claims description 41
- 238000005336 cracking Methods 0.000 claims description 32
- 238000005097 cold rolling Methods 0.000 claims description 18
- 239000000758 substrate Substances 0.000 claims description 18
- 230000003647 oxidation Effects 0.000 claims description 15
- 238000007254 oxidation reaction Methods 0.000 claims description 15
- 238000005098 hot rolling Methods 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 9
- 229910052787 antimony Inorganic materials 0.000 claims description 8
- 230000000052 comparative effect Effects 0.000 description 53
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 48
- 230000008569 process Effects 0.000 description 25
- 239000011572 manganese Substances 0.000 description 23
- 238000005261 decarburization Methods 0.000 description 22
- 229910000831 Steel Inorganic materials 0.000 description 19
- 229910052742 iron Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000011651 chromium Substances 0.000 description 13
- 230000004907 flux Effects 0.000 description 13
- 239000007789 gas Substances 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 12
- 229910052748 manganese Inorganic materials 0.000 description 11
- 238000005121 nitriding Methods 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 230000000630 rising effect Effects 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 10
- 230000009466 transformation Effects 0.000 description 10
- 150000004767 nitrides Chemical class 0.000 description 9
- 229910001566 austenite Inorganic materials 0.000 description 8
- 239000003112 inhibitor Substances 0.000 description 8
- 230000002401 inhibitory effect Effects 0.000 description 7
- 229910000859 α-Fe Inorganic materials 0.000 description 7
- 230000006378 damage Effects 0.000 description 6
- 239000003966 growth inhibitor Substances 0.000 description 6
- 238000002791 soaking Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000007792 addition Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- -1 nitrogen ions Chemical class 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 229910004283 SiO 4 Inorganic materials 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009422 growth inhibiting effect Effects 0.000 description 1
- 230000009036 growth inhibition Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
도 2는 본 발명의 일 실시예에 의한 방향성 전기강판의 개략적인 단면도이다.
온도 영역별 산화능 | 식1 | 식 2 | 식 3 | 구분 | ||
제1 승온 단계 | 제2 승온 단계 | 균열 단계 | ||||
0.46 | 0.044 | 0.18 | 0.416 | 0.136 | 0.28 | 비교재1 |
0.39 | 0.012 | 0.53 | 0.378 | 0.518 | -0.14 | 비교재2 |
0.4 | 0.036 | 0.87 | 0.364 | 0.834 | -0.47 | 비교재3 |
0.33 | 0.07 | 0.22 | 0.26 | 0.15 | 0.11 | 비교재4 |
0.14 | 0.426 | 0.54 | -0.286 | 0.114 | -0.4 | 비교재5 |
0.36 | 0.329 | 0.96 | 0.031 | 0.631 | -0.6 | 비교재6 |
0.38 | 0.95 | 0.23 | -0.57 | -0.72 | 0.15 | 비교재7 |
0.59 | 0.8 | 0.49 | -0.21 | -0.31 | 0.1 | 비교재8 |
0.18 | 0.62 | 0.85 | -0.44 | 0.23 | -0.67 | 비교재9 |
1.18 | 0.027 | 0.16 | 1.153 | 0.133 | 1.02 | 비교재10 |
1.84 | 0.015 | 0.56 | 1.825 | 0.545 | 1.28 | 비교재11 |
1.02 | 0.027 | 0.71 | 0.993 | 0.683 | 0.31 | 비교재12 |
1.44 | 0.1 | 0.11 | 1.34 | 0.01 | 1.33 | 비교재13 |
1.83 | 0.388 | 0.47 | 1.442 | 0.082 | 1.36 | 발명재1 |
0.95 | 0.256 | 0.51 | 0.694 | 0.254 | 0.44 | 발명재2 |
0.79 | 0.398 | 0.47 | 0.392 | 0.072 | 0.32 | 발명재3 |
1.53 | 0.234 | 0.58 | 1.296 | 0.346 | 0.95 | 발명재4 |
0.71 | 0.423 | 0.33 | 0.287 | -0.093 | 0.38 | 발명재5 |
1.51 | 0.59 | 0.55 | 0.92 | -0.04 | 0.96 | 발명재6 |
1.71 | 0.406 | 0.46 | 1.304 | 0.054 | 1.25 | 발명재7 |
1.02 | 0.136 | 0.33 | 0.884 | 0.194 | 0.69 | 발명재8 |
1.69 | 0.116 | 0.46 | 1.574 | 0.344 | 1.23 | 발명재9 |
0.76 | 0.159 | 0.39 | 0.601 | 0.231 | 0.37 | 발명재10 |
0.97 | 0.266 | 0.51 | 0.704 | 0.244 | 0.46 | 발명재11 |
1.2 | 0.24 | 0.46 | 0.96 | 0.22 | 0.74 | 발명재12 |
0.84 | 0.067 | 0.51 | 0.773 | 0.443 | 0.33 | 발명재13 |
1.76 | 0.371 | 0.47 | 1.389 | 0.099 | 1.29 | 발명재14 |
1.27 | 0.26 | 0.74 | 1.01 | 0.48 | 0.53 | 비교재14 |
1.01 | 0.79 | 0.15 | 0.22 | -0.64 | 0.86 | 비교재15 |
1.88 | 0.81 | 0.38 | 1.07 | -0.43 | 1.5 | 비교재16 |
0.96 | 0.85 | 0.85 | 0.11 | 0 | 0.11 | 비교재17 |
2.48 | 0.015 | 0.13 | 2.465 | 0.115 | 2.35 | 비교재18 |
3.4 | 0.031 | 0.48 | 3.369 | 0.449 | 2.92 | 비교재19 |
2.43 | 0.019 | 0.92 | 2.411 | 0.901 | 1.51 | 비교재20 |
3.45 | 0.056 | 0.12 | 3.394 | 0.064 | 3.33 | 비교재21 |
3 | 0.381 | 0.43 | 2.619 | 0.049 | 2.57 | 비교재22 |
3.13 | 0.202 | 0.71 | 2.928 | 0.508 | 2.42 | 비교재23 |
3.26 | 0.72 | 0.21 | 2.54 | -0.51 | 3.05 | 비교재24 |
2.44 | 0.71 | 0.52 | 1.73 | -0.19 | 1.92 | 비교재25 |
2.94 | 0.69 | 0.63 | 2.25 | -0.06 | 2.31 | 비교재26 |
철손 (W17/50) | 자속밀도 (B8) | 전기강판 기재 내의 Co 함량(중량%) | 금속 산화물 층으로의 Co 확산양(중량%) | 금속 산화물 층 내의 Co 함량(중량%) | 평균 β각도(O) | 구분 |
0.88 | 1.86 | 0.0204 | 0.0116 | 0.476 | 6 | 비교재1 |
0.85 | 1.88 | 0.0196 | 0.0124 | 0.509 | 5.4 | 비교재2 |
0.91 | 1.86 | 0.0232 | 0.0088 | 0.361 | 5.8 | 비교재3 |
0.88 | 1.89 | 0.021 | 0.011 | 0.452 | 4.6 | 비교재4 |
0.84 | 1.9 | 0.0208 | 0.0112 | 0.46 | 3.7 | 비교재5 |
0.87 | 1.88 | 0.0239 | 0.0081 | 0.333 | 5.8 | 비교재6 |
0.88 | 1.86 | 0.0236 | 0.0084 | 0.345 | 5.5 | 비교재7 |
0.88 | 1.89 | 0.0205 | 0.0115 | 0.472 | 5.1 | 비교재8 |
0.9 | 1.86 | 0.0244 | 0.0076 | 0.312 | 5.4 | 비교재9 |
0.88 | 1.89 | 0.0234 | 0.0086 | 0.353 | 5.1 | 비교재10 |
0.84 | 1.9 | 0.0214 | 0.0106 | 0.435 | 4.4 | 비교재11 |
0.88 | 1.89 | 0.0203 | 0.0117 | 0.481 | 5.4 | 비교재12 |
0.86 | 1.89 | 0.0201 | 0.0119 | 0.489 | 4.5 | 비교재13 |
0.8 | 1.92 | 0.0287 | 0.0033 | 0.136 | 2.6 | 발명재1 |
0.8 | 1.92 | 0.0317 | 0.0003 | 0.012 | 2.9 | 발명재2 |
0.81 | 1.92 | 0.0272 | 0.0048 | 0.197 | 1.8 | 발명재3 |
0.8 | 1.92 | 0.0269 | 0.0051 | 0.209 | 1.9 | 발명재4 |
0.81 | 1.94 | 0.0283 | 0.0037 | 0.152 | 2.7 | 발명재5 |
0.79 | 1.93 | 0.0265 | 0.0055 | 0.226 | 2.6 | 발명재6 |
0.79 | 1.94 | 0.0273 | 0.0047 | 0.193 | 1.9 | 발명재7 |
0.8 | 1.92 | 0.0301 | 0.0019 | 0.078 | 2.9 | 발명재8 |
0.81 | 1.92 | 0.0271 | 0.0049 | 0.201 | 2.9 | 발명재9 |
0.79 | 1.94 | 0.031 | 0.001 | 0.041 | 2.1 | 발명재10 |
0.81 | 1.93 | 0.0318 | 0.0002 | 0.008 | 2.6 | 발명재11 |
0.8 | 1.91 | 0.0271 | 0.0049 | 0.201 | 2.6 | 발명재12 |
0.81 | 1.94 | 0.0264 | 0.0056 | 0.23 | 2.1 | 발명재13 |
0.81 | 1.93 | 0.0276 | 0.0044 | 0.181 | 2.6 | 발명재14 |
0.84 | 1.89 | 0.0234 | 0.0086 | 0.353 | 3.8 | 비교재14 |
0.85 | 1.89 | 0.0198 | 0.0122 | 0.501 | 5.1 | 비교재15 |
0.86 | 1.9 | 0.0197 | 0.0123 | 0.505 | 3.5 | 비교재16 |
0.85 | 1.88 | 0.0209 | 0.0111 | 0.456 | 5.1 | 비교재17 |
0.95 | 1.86 | 0.0195 | 0.0125 | 0.513 | 5.9 | 비교재18 |
0.85 | 1.88 | 0.0217 | 0.0103 | 0.423 | 5.2 | 비교재19 |
0.93 | 1.85 | 0.0253 | 0.0067 | 0.275 | 5.1 | 비교재20 |
0.86 | 1.88 | 0.019 | 0.013 | 0.534 | 5 | 비교재21 |
0.84 | 1.9 | 0.0239 | 0.0081 | 0.333 | 3.7 | 비교재22 |
0.85 | 1.89 | 0.021 | 0.011 | 0.452 | 5.1 | 비교재23 |
0.95 | 1.87 | 0.0252 | 0.0068 | 0.279 | 5.3 | 비교재24 |
0.88 | 1.88 | 0.0252 | 0.0068 | 0.279 | 5.2 | 비교재25 |
0.89 | 1.85 | 0.0251 | 0.0069 | 0.283 | 5.2 | 비교재26 |
Claims (11)
- 중량%로, Si: 2.0 내지 6.0%, C: 0.005% 이하(0%를 제외함), Sb: 0.01 내지 0.05%, Sn:0.03 내지 0.08%, Cr:0.01 내지 0.2% 및 Co: 0.0003 내지 0.097% 포함하고, 잔부 Fe 및 불가피한 불순물을 포함하는 전기강판 기재 및
상기 전기강판 기재의 표면 상에 위치하는 금속 산화물층을 포함하고,
상기 금속 산화물층은 Co를 0.0005 내지 0.25 중량% 포함하고,
상기 금속 산화물층의 두께는 0.5 내지 10 ㎛인 방향성 전기강판. - 제1항에 있어서,
상기 전기강판 기재는 Al: 0.005 내지 0.04 중량%, Mn: 0.01 내지 0.2 중량%, N:0.01 중량% 이하, S:0.01 중량% 이하 및 P:0.0005 내지 0.045 중량% 중 1종 이상을 더 포함하는 방향성 전기강판. - 제1항에 있어서,
상기 금속 산화물층은 Si:10 내지 30 중량%, O: 30 내지 55 중량%, Mg:25 내지 50 중량% 및 잔부 Fe 및 불가피한 불순물을 더 포함하는 방향성 전기강판. - 삭제
- 제1항에 있어서,
상기 전기강판 기재는 결정립을 포함하고, 결정립의 평균 β 각도가 3° 이하인 방향성 전기강판.
(이 때, β 각도란 압연수직면을 기준으로 보았을 때, 집합 조직의 [001]방향이 압연 방향축과 이루는 각도를 의미한다.) - 중량%로, Si: 2.0 내지 6.0%, C: 0.02 내지 0.08%, Sb: 0.01 내지 0.05%, Sn:0.03 내지 0.08%, Cr:0.01 내지 0.2% 및 Co: 0.0005 내지 0.1% 포함하고, 잔부 Fe 및 불가피한 불순물을 포함하는 슬라브를 가열하는 단계;
상기 슬라브를 열간 압연하여 열연판을 제조하는 단계;
상기 열연판을 냉간 압연하여 냉연판을 제조하는 단계;
상기 냉연판을 1차 재결정 소둔하는 단계; 및
상기 1차 재결정 소둔한 냉연판을 2차 재결정소둔하는 단계;를 포함하고,
상기 1차 재결정 소둔하는 단계는 제1 승온 단계, 제2 승온 단계 및 균열 단계를 포함하고,
상기 제1 승온 단계의 산화능은 0.7 내지 2.0이고, 제2 승온 단계의 산화능은 0.05 내지 0.6이고, 균열 단계의 산화능은 0.3 내지 0.6이고,
상기 제1 승온 단계는 상기 냉연판을 710 내지 770℃의 종료온도까지 승온하는 단계이고,
상기 제2 승온 단계는 제1 승온 단계의 종료 온도에서 830 내지 890℃의 종료온도까지 온도를 승온하는 단계이고,
상기 균열 단계는 제2 승온 단계의 종료 온도 내지 900℃의 범위에서 온도를 유지하는 단계인 방향성 전기강판 제조방법. - 제6항에 있어서,
상기 제1 승온 단계의 산화능 및 상기 제2 승온 단계의 산화능이 하기 식 1을 만족하는 방향성 전기강판 제조방법.
[식 1]
0.3 ≤ [P1] - [P2] ≤ 1.6
(식 1에서 [P1] 및 [P2]는 각각 제1 승온 단계의 산화능 및 제2 승온 단계의 산화능을 의미한다.) - 제6항에 있어서,
상기 제2 승온 단계의 산화능 및 상기 균열 단계의 산화능이 하기 식 2를 만족하는 방향성 전기강판 제조방법.
[식 2]
-0.1 ≤ [P3] - [P2] ≤ 0.5
(식 2에서 [P2] 및 [P3]는 각각 제2 승온 단계의 산화능 및 균열 단계의 산화능을 의미한다.) - 제6항에 있어서,
상기 제1 승온 단계의 산화능 및 상기 균열 단계의 산화능이 하기 식 3를 만족하는 방향성 전기강판 제조방법.
[식 3]
0.3 ≤ [P1] - [P3] ≤ 1.5
(식 3에서 [P1] 및 [P3]는 각각 제1 승온 단계의 산화능 및 균열 단계의 산화능을 의미한다.) - 삭제
- 제6항에 있어서,
상기 2차 재결정 소둔하는 단계는 900 내지 1210℃의 균열 온도에서 수행하는 방향성 전기강판 제조방법.
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