JP6214674B2 - 高硬度低合金耐摩耗鋼板およびその製造方法 - Google Patents
高硬度低合金耐摩耗鋼板およびその製造方法 Download PDFInfo
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- JP6214674B2 JP6214674B2 JP2015551981A JP2015551981A JP6214674B2 JP 6214674 B2 JP6214674 B2 JP 6214674B2 JP 2015551981 A JP2015551981 A JP 2015551981A JP 2015551981 A JP2015551981 A JP 2015551981A JP 6214674 B2 JP6214674 B2 JP 6214674B2
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- 229910000831 Steel Inorganic materials 0.000 title claims description 115
- 239000010959 steel Substances 0.000 title claims description 115
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- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000005496 tempering Methods 0.000 claims description 12
- 229910001566 austenite Inorganic materials 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
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- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
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- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 229910052799 carbon Inorganic materials 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 239000011651 chromium Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910052804 chromium Inorganic materials 0.000 description 10
- 239000010936 titanium Substances 0.000 description 10
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- 238000012360 testing method Methods 0.000 description 9
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- 230000000694 effects Effects 0.000 description 8
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229910052748 manganese Inorganic materials 0.000 description 7
- 239000010955 niobium Substances 0.000 description 7
- 229910052719 titanium Inorganic materials 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 239000011733 molybdenum Substances 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
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- 238000005204 segregation Methods 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 3
- 229910000617 Mangalloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 229910000859 α-Fe Inorganic materials 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000922 High-strength low-alloy steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 238000005272 metallurgy Methods 0.000 description 1
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- 150000004767 nitrides Chemical class 0.000 description 1
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Description
高硬度低合金耐摩耗鋼板は、重量百分率において以下の化学成分を有する:C:0.33〜0.45%;Si:0.10〜0.50%;Mn:0.50〜1.50%;B:0.0005〜0.0040%;Cr:1.50%以下;Mo:0.80%以下;Ni:2.00%以下;Nb:0.080%以下;V:0.080%以下;Ti:0.060%以下;RE:0.10%以下;W:1.00%以下;Al:0.010〜0.080%;Ca:0.0010〜0.0080%;N:0.0080%以下;O:0.0080%以下;H:0.0004%以下;P:0.015%以下;S:0.010%以下;および(Cr/5+Mn/6+50B):0.20%以上0.50%以下;(Mo/3+Ni/5+2Nb):0.02%以上0.50%以下;(Al+Ti):0.01%以上0.13%以下、残余はFeおよび不可避不純物であり;その微細構造は微細なマルテンサイトおよび残留オーステナイトであり;典型的な機械的特性は:550HBより大きい硬度、および40Jより大きい−40℃シャルピーVノッチ縦衝撃エネルギである。
高硬度低合金耐摩耗鋼板を製造する方法は、以下のステップを含む:
それぞれの元の材料を前述の化学成分の割合で溶解し、鋳造、加熱、圧延、および圧延の直後に冷却して鋼板を得るステップを含み、加熱ステップでは、スラブ加熱温度は1000〜1200℃であり、および熱保持時間は1〜3時間であり;圧延ステップでは、粗圧延温度は900〜1150℃であり、一方、仕上げ圧延温度は780〜880℃であり;冷却ステップでは、鋼は400℃より下に水冷され、次いで、周囲温度に空冷され、水冷の速度は20℃/s以上である。
炭素:炭素は耐摩耗鋼において最も基本的で最も重要な元素であり、それは鋼の強度および硬度を改善し、したがって、その耐摩耗性をさらに改善することが可能である。しかしながら、それは鋼の靭性および溶接性能に対しては良くない。したがって、鋼における炭素含有量は、0.33〜0.45wt%間に、好ましくは0.33〜0.43wt%間に制御されるべきである。
1. 化学成分に関して、この発明の耐摩耗鋼板は、低い炭素および低い合金を優先し、Nb、Tiまたはその他同種のもののようなマイクロ合金元素の微細化および強化の特性を十分に利用して、炭素ならびにCr、MoおよびNiのような合金元素の含有量を低減し、鋼板の十分な機械的特性を保証する。
以下に、この発明の技術的解決法が、詳細な実施の形態と関連してさらに設定される。それらの実施の形態は、この発明の詳述された実現例を記載するためにのみ用いられ、その保護範囲に対するいかなる限定を構成するためにも用いられないことが明記されるべきである。
実施の形態1〜10における高硬度低合金耐摩耗鋼板が、機械的特性に関して試験され、その結果が表3に示される。
耐摩耗性試験はML−100摩損試験機上で実行される。試料を切断するとき、試料の軸は鋼板表面に垂直であり、試料の摩耗表面は鋼板の圧延表面である。試料は、Φ4mmの試験される部分およびΦ5mmのクランプされる部分を有する階段状の円筒体に機械加工される。試験の前に、試料はアルコールですすがれ、ブロワーで乾燥させられ、次いで、1万分の1の精度を有するスケール上で計量される。測定された重量は、原重量としてとられ、次いで、それは弾性クランプ上に取り付けられる。試験は荷重84Nの影響下で80メッシュの研摩紙で行われる。試験の後、試料と研摩紙との間の摩耗のため、渦巻線が試料によって研摩紙に描かれ得る。渦巻線の開始半径および終了半径によれば、渦巻線の長さは、以下の式で計算される:
S=π(r1 2−r2 2)/a
r1は渦巻線の開始半径であり;r2は渦巻線の終了半径であり;aは渦巻線の送り量である。各試験では、計量は3回実行され、平均結果が用いられる。次いで、重量損失が計算され、1メートル当たりの重量損失は試料の摩耗率(mg/M)を示す。
微細構造は実施の形態7の耐摩耗鋼板をチェックすることによって得られる。図1に示されるように、微細構造は微細なマルテンサイトおよび微量の残留オーステナイトであり、残留オーステナイトの体積分率は5%以下であり、それは、鋼板が優れた機械的特性を有することを保証する。
Claims (14)
- 高硬度低合金耐摩耗鋼板であって、重量百分率において:C:0.33〜0.37%;Si:0.33〜0.50%;Mn:0.95〜1.50%;B:0.0005〜0.0040%;Cr:1.50%以下;Mo:0.17〜0.80%;Ni:0.31〜2.00%;Nb:0.080%以下;V:0.080%以下;Ti:0.060%以下;RE:0.10%以下;W:1.00%以下;Al:0.010〜0.080%、Ca:0.0010〜0.0080%、N:0.0080%以下、O:0.0080%以下、H:0.0004%以下、P:0.015%以下、S:0.010%以下、(Cr/5+Mn/6+50B):0.20%以上0.50%以下;(Mo/3+Ni/5+2Nb):0.02%以上0.50%以下;(Al+Ti):0.01%以上0.13%以下であり、MoとNiとは同時に0%になることはなく、残余はFeおよび不可避不純物である化学成分を有し;その微細構造はマルテンサイトおよび残留オーステナイトであり;その機械的特性は:575HBより大きい硬度、および65Jより大きい−40℃シャルピーVノッチ縦衝撃エネルギであり、残留オーステナイトの体積分率は5%以下である、高硬度低合金耐摩耗鋼板。
- REはLa、Ce、Ndの1つまたはいくつかである、請求項1に記載の高硬度低合金耐摩耗鋼板。
- 重量百分率において:C:0.35〜0.37%;Si:0.33〜0.40%の化学成分を有する、請求項1に記載の高硬度低合金耐摩耗鋼板。
- 重量百分率において:Mn:0.50〜1.20%;Cr:0.10〜1.30%;Mo:0.17〜0.60%;Ni:0.31〜1.50%;および(Mo/3+Ni/5+2Nb):0.04%以上0.45%以下の化学成分を有する、請求項1に記載の高硬度低合金耐摩耗鋼板。
- 重量百分率において:Nb:0.005〜0.080wt%;V:0.060%以下;RE:0.08%以下;W:0.80%以下の化学成分を有する、請求項1に記載の高硬度低合金耐摩耗鋼板。
- 重量百分率において:B:0.0005〜0.0020%;Ca:0.0010%〜0.0060%;(Cr/5+Mn/6+50B):0.20%以上0.45%以下の化学成分を有する、請求項1に記載の高硬度低合金耐摩耗鋼板。
- 重量百分率において:N:0.0050%以下;O:0.0050%以下;H:0.0003%以下;P:0.012%以下;S:0.005%以下の化学成分を有する、請求項1に記載の高硬度低合金耐摩耗鋼板。
- 重量百分率において:Al:0.020〜0.080%;Ti:0.005〜0.060wt%;(Al+Ti):0.01%以上0.12%以下の化学成分を有する、請求項1〜請求項7のいずれか1つに記載の高硬度低合金耐摩耗鋼板。
- 請求項1〜請求項8のいずれか1つに記載の高硬度低合金耐摩耗鋼板を製造する方法であって、前述の割合の化学成分を溶解し、鋳造、加熱、圧延、および圧延の直後に冷却して高硬度低合金耐摩耗鋼板を得るステップを含み、前記加熱ステップでは、スラブ加熱温度は1000〜1200℃であり、および熱保持時間は1〜3時間であり;前記圧延ステップでは、粗圧延温度は900〜1150℃であり、一方、仕上げ圧延温度は780〜880℃であり;前記冷却ステップでは、前記鋼は400℃より下に水冷され、次いで、周囲温度に空冷され、水冷の速度は20℃/s以上である、高硬度低合金耐摩耗鋼板を製造する方法。
- 前記圧延直後に冷却するステップは、焼戻しステップをさらに含み、前記焼戻しステップにおいては、加熱温度は100〜400℃であり、熱保持時間は30〜120分である、請求項9に記載の高硬度低合金耐摩耗鋼板を製造する方法。
- 前記加熱ステップでは、スラブ加熱温度は1000〜1150℃である、請求項9または請求項10に記載の高硬度低合金耐摩耗鋼板を製造する方法。
- 前記圧延ステップでは、粗圧延温度は900〜1100℃であり、粗圧延ステップにおける圧延率は20%より大きく、一方で仕上げ圧延温度は780〜860℃であり、仕上げ圧延ステップにおける圧延率は40%より大きい、請求項9または請求項10に記載の高硬度低合金耐摩耗鋼板を製造する方法。
- 前記冷却ステップでは、冷却中止温度は380℃より下であり、水冷速度は23℃/s以上である、請求項9または請求項10に記載の高硬度低合金耐摩耗鋼板を製造する方法。
- 前記焼戻しステップでは、焼戻し温度は100〜380℃であり、熱保持時間は30〜100分である、請求項10に記載の高硬度低合金耐摩耗鋼板を製造する方法。
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CN102260829B (zh) * | 2010-05-28 | 2013-09-04 | 宝山钢铁股份有限公司 | 一种500hb级耐磨钢板及其制造方法 |
JP5866820B2 (ja) | 2010-06-30 | 2016-02-24 | Jfeスチール株式会社 | 溶接部靭性および耐遅れ破壊特性に優れた耐磨耗鋼板 |
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CN102876969B (zh) * | 2012-07-31 | 2015-03-04 | 宝山钢铁股份有限公司 | 一种超高强度高韧性耐磨钢板及其制造方法 |
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CN103205634B (zh) | 2013-03-28 | 2016-06-01 | 宝山钢铁股份有限公司 | 一种低合金高硬度耐磨钢板及其制造方法 |
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EP2980257A1 (en) | 2016-02-03 |
AU2014243613A1 (en) | 2015-07-23 |
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CN103205634B (zh) | 2016-06-01 |
US10208369B2 (en) | 2019-02-19 |
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KR20170055560A (ko) | 2017-05-19 |
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