JP6254160B2 - 超高強度高靭性耐摩耗鋼板及びその製造方法 - Google Patents
超高強度高靭性耐摩耗鋼板及びその製造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims description 123
- 239000010959 steel Substances 0.000 title claims description 123
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- 238000010438 heat treatment Methods 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 16
- 229910001566 austenite Inorganic materials 0.000 claims description 15
- 229910052804 chromium Inorganic materials 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 229910052748 manganese Inorganic materials 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 11
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- 238000005299 abrasion Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910000734 martensite Inorganic materials 0.000 claims description 7
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
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- 238000012360 testing method Methods 0.000 description 35
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- 239000010955 niobium Substances 0.000 description 16
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 15
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 10
- 239000011572 manganese Substances 0.000 description 10
- 239000011575 calcium Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000005728 strengthening Methods 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- 239000010703 silicon Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
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- 239000000126 substance Substances 0.000 description 5
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000002436 steel type Substances 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
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- 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 2
- 230000004580 weight loss Effects 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 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
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 208000012868 Overgrowth Diseases 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 230000004075 alteration Effects 0.000 description 1
- 229910001563 bainite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- 238000009864 tensile test Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- C22C—ALLOYS
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Description
本発明実施例1〜7及び対比例1(中国特許CN1865481A)の鋼板の化学元素質量百分率を表1に示した。
実施例1〜7の具体的なプロセスパラメーターを表2に示した。
GB/T2975の試料採取方法に準じてサンプリングし、GB/T231.1の試験方法に準じて本発明実施例1〜7の低合金超高強度高靭性の耐摩耗鋼板に対して硬度を測定し、GB/T229の試験方法に準じて衝撃試験を行い、GB/T228の試験方法に準じて引張試験を行い、GB/T232の試験方法に準じて曲げ試験を行って、その結果を表3に示した。
「斜めY形の溶接割れ試験方法」(GB4675.1−84)に準じて、本発明の耐摩耗鋼板について5グループに別れて斜めY形の溶接割れ試験を行った。斜めY形の溶接割れ試験材の形状及び寸法は図1に示されている。
耐摩耗性試験は、ML−100アブレシブ摩耗試験机で行った。試験材を切り取る場合、試験材の軸が鋼板表面に対して垂直になるようにして、試験材の摩耗面を鋼板の圧延面にする。試験材を要求に応じて階段状円柱に加工し、試験部分の寸法がΦ4mmであり、治具でつかまれた部分の寸法がΦ5mmである。試験前に、アルコールで試験材を洗浄して、ブロワーで乾燥し、精度が1/10000であるてんびんで量り、得られた試験材重量を原始重量とし、そして試験材を弾性治具に取り付けた。粒度が80メッシュである紙やすりを用い、42N荷重の作用で試験を行った。試験後、試験材と紙やすりとの間の摩耗により、試験材は紙やすりに螺旋線を引いた。螺旋線の開始半径及び終止半径から、螺旋線の長さを下記の計算式により算出した。
Claims (23)
- 重量百分率組成がC:0.22〜0.35%、Si:0.10〜0.40%、Mn:0.60〜1.35%、P≦0.015%、S≦0.010%、Nb:0.010〜0.040%、Al:0.010〜0.080%、B:0.0006〜0.0014%、Ti:0.005〜0.050%、Ca:0.0010〜0.0080%、V≦0.080%、Cr≦0.60%、W≦1.00%、N≦0.0080%、O≦0.0060%、H≦0.0004%であり、かつ0.025%≦Nb+Ti≦0.080%、0.030%≦Al+Ti≦0.12%を満足し、余分がFe及び不可避的不純物であり、
主にマルテンサイトと残りのオーステナイトとからなり、残りのオーステナイトの体積分率が5%以下である微細構造を有し、
引張強度が1400〜1700MPa、伸びが13〜14%、ブリネル硬度が470〜570HBW、−40℃のシャルピーV型縦方向の衝撃値が50〜80Jであることを特徴とする耐摩耗鋼板。 - Cが0.23〜0.33%である請求項1に記載の耐摩耗鋼板。
- Siが0.10〜0.35%である請求項1又は2に記載の耐摩耗鋼板。
- Mnが0.65〜1.30%である請求項1〜3のいずれか1項に記載の耐摩耗鋼板。
- P≦0.010%である請求項1〜4のいずれか1項に記載の耐摩耗鋼板。
- S≦0.005%である請求項1〜5のいずれか1項に記載の耐摩耗鋼板。
- Nbが0.010〜0.035%である請求項1〜6のいずれか1項に記載の耐摩耗鋼板。
- Alが0.020〜0.060%である請求項1〜7のいずれか1項に記載の耐摩耗鋼板。
- Bが0.0008〜0.0014%である請求項1〜8のいずれか1項に記載の耐摩耗鋼板。
- Tiが0.010〜0.045%である請求項1〜9のいずれか1項に記載の耐摩耗鋼板。
- Caが0.0010〜0.0060%である請求項1〜10のいずれか1項に記載の耐摩耗鋼板。
- V≦0.060%である請求項1〜11のいずれか1項に記載の耐摩耗鋼板。
- Cr≦0.40%である請求項1〜12のいずれか1項に記載の耐摩耗鋼板。
- W≦0.80wt%である請求項1〜13のいずれか1項に記載の耐摩耗鋼板。
- N≦0.0050%である請求項1〜14のいずれか1項に記載の耐摩耗鋼板。
- O≦0.0040%である請求項1〜15のいずれか1項に記載の耐摩耗鋼板。
- H≦0.0003%である請求項1〜16のいずれか1項に記載の耐摩耗鋼板。
- 0.035%≦Nb+Ti≦0.070%、0.040%≦Al+Ti≦0.11%である請求項1〜17のいずれか1項に記載の耐摩耗鋼板。
- 溶錬、鋳造、加熱、圧延及び圧延後の直接冷却等の工程を順次に含んでおり、
加熱工程において、加熱温度が1000〜1200℃、保温時間が1〜2時間であり;
圧延工程において、初期圧延温度が950〜1150℃、最終圧延温度が800〜950℃であり;
圧延後の直接冷却工程において、水冷を採用し、冷却停止温度が室温〜300℃である、請求項1〜18のいずれか1項に記載の耐摩耗鋼板の製造方法。 - 保温時間が2時間である請求項19に記載の耐摩耗鋼板の製造方法。
- 板ビレットの加熱温度が1000〜1150℃である請求項19又は20に記載の耐摩耗鋼板の製造方法。
- 初期圧延温度が950〜1100℃、最終圧延温度が800〜900℃である請求項19〜21のいずれか1項に記載の耐摩耗鋼板の製造方法。
- 冷却停止温度が室温〜280℃である請求項19〜22のいずれか1項に記載の耐摩耗鋼板の製造方法。
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