CS277285B6 - steel for cast stock exhibiting high toughness and resistance to abrasive wear - Google Patents
steel for cast stock exhibiting high toughness and resistance to abrasive wear Download PDFInfo
- Publication number
- CS277285B6 CS277285B6 CS911042A CS104291A CS277285B6 CS 277285 B6 CS277285 B6 CS 277285B6 CS 911042 A CS911042 A CS 911042A CS 104291 A CS104291 A CS 104291A CS 277285 B6 CS277285 B6 CS 277285B6
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- CS
- Czechoslovakia
- Prior art keywords
- steel
- resistance
- abrasive wear
- high toughness
- exhibiting high
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 10
- 239000010959 steel Substances 0.000 title claims abstract description 10
- 230000001747 exhibiting effect Effects 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 239000011651 chromium Substances 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract 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 abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 3
- 239000011733 molybdenum Substances 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 239000011574 phosphorus Substances 0.000 claims abstract description 3
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 3
- 239000010703 silicon Substances 0.000 claims abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 3
- 239000011593 sulfur Substances 0.000 claims abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 3
- 238000005266 casting Methods 0.000 claims description 8
- 238000005299 abrasion Methods 0.000 description 3
- -1 aluminum nitrides Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Crushing And Grinding (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Ocel s hmot. obsahem 0,28 až 0,38 % uhlíku, 0,5 až 1,2 % manganu, 1,0 až 1,6 % křemíku, 1,8 až 3,2 % chrómu, 0,7 až 1,6 % niklu, 0,25 až 0,45 % molybdenu, 0,005 až 0,03 % fosforu, 0,005 až 0,03 % síry, obsahuje dále v hmot. koncentraci 0,01 až 0,04 S zirkónia, 0,001 až 0,005 % bóru s o,01 až 0,1 £ hliníku, zbytek tvoří železo.Steel with mass containing 0.28 to 0.38% carbon; 0.5 to 1.2% manganese, 1.0 to 1.6% silicon, 1.8 to 3.2% chromium, 0.7 to 1.6% nickel, 0.25 to 0.45% molybdenum, 0.005 to 0.03% phosphorus, 0.005 to 0.03% sulfur, contains further in wt. a concentration of 0.01 to 0.04 S zirconium, 0.001 to 0.005% boron with 0.011 to 0.1% Aluminum, the remainder being iron.
Description
Oblast technikyField of technology
Vynález se týká oceli na odlitky s vysokou pevností, houževnatostí a odolností proti abrazivnímu opotřebení, která je zvlášť vhodná pro mezistěny trubnatých mlýnů na mletí cementu, zuby drtičů rud a šneků cihlářských lisů.The invention relates to a steel for castings with high strength, toughness and abrasion wear resistance, which is particularly suitable for the partitions of tubular cement milling mills, the teeth of ore crushers and the screws of brick presses.
Dosavadní stav technikyPrior art
Doposud se používají na výrobu značně dynamicky zatěžovaných součástí, vystavených abrazivnímu opotřebení nízko a středně legované podeutektoidní a nadeutektoidní oceli, se strukturou popuštěného martenzitu nebo sorbitu. Oceli mají hrubou primární strukturu, u které se v mezidendritické oblasti při vyšším obsahu dusíku vyloučí na hranicích původních austenitických zrn křehké nitridy hliníku. V těchto místech se také nachází křehké kysličníky hliníku ve tvaru ostrohranných nekovových vměstků s trhlinami.Until now, they are used for the production of highly dynamically loaded parts, exposed to abrasive wear of low and medium alloyed podeutectoid and supereutectoid steels, with the structure of tempered martensite or sorbitol. Steels have a coarse primary structure, in which brittle aluminum nitrides are precipitated at the boundaries of the original austenitic grains in the interdendritic region with a higher nitrogen content. In these places there are also brittle aluminum oxides in the form of sharp-edged non-metallic inclusions with cracks.
V kaleném a popuštěném stavu při tvrdosti 51 až 53 HRC se dosahuje nízké rázové houževnatosti KCV = 0,05 až 0,15 MJ.m . Následkem toho po určité době provozního využití odlitků dochází k praskání součástí, což snižuje jejich životnost. Hodnota poměrné odolnosti proti abrazivnímu použitíwje maximálně 2,1.In the hardened and tempered state at a hardness of 51 to 53 HRC, a low impact strength KCV = 0.05 to 0.15 MJ.m is achieved. As a result, after a certain period of operational use of the castings, the components crack, which reduces their service life. The value of the relative abrasion resistance is a maximum of 2.1.
Podstata vynálezu .The essence of the invention.
Uvedené nedostatky odstraňuje ocel na odlitky s vysokou houževnatostí a odolností proti abrazivnímu opotřebení, obsahující v hmot, koncentraci 0,28 až 0,38 % uhlíku, 0,5 až 1,2 % manganu, 1,0 až 1,6 % křemíku, 1,8 až 3,2 % chrómu, 0,7 až 1,6 % niklu, 0,25 až 0,45 % molybdenu, 0,005 až 0,03 % fosforu, 0,005 až 0,03 % síry, zbytek tvoří železo podle vynálezu. Jeho podstata spočívá v tom, že obsahuje v hmot, koncentraci 0,01 až 0,04 % zirkonia, 0,001 až 0,005 % bóru a 0,01 až 0,1 % hliníku.These shortcomings are eliminated by steel for castings with high toughness and resistance to abrasive wear, containing by weight in a concentration of 0.28 to 0.38% carbon, 0.5 to 1.2% manganese, 1.0 to 1.6% silicon, 1.8 to 3.2% chromium, 0.7 to 1.6% nickel, 0.25 to 0.45% molybdenum, 0.005 to 0.03% phosphorus, 0.005 to 0.03% sulfur, the remainder being iron according to of the invention. Its essence lies in the fact that it contains in a weight concentration of 0.01 to 0.04% of zirconium, 0.001 to 0.005% of boron and 0.01 to 0.1% of aluminum.
Základní výhoda oceli na odlitky podle vynálezu spočívá ve zvýšení houževnatosti, způsobené zjemněním nekovových vměstků. Úplně se odstraní vyloučení křehkých oxidů a nitridů na hranicích primárních zrn. Při popouštění na tvrdost 50 až 55 HRC se hodnota vrubové rázové houževnatosti zvýší na hodnotu KCV = 0,400 až 0,650 MJ.m”2. Také hodnota poměrné odolnosti proti abrazivnímu opotřebení je vyšší, W = 2,0 až 2,4.The main advantage of the steel for castings according to the invention is the increase in toughness caused by the refinement of non-metallic inclusions. The elimination of brittle oxides and nitrides at the primary grain boundaries is completely eliminated. When tempering to a hardness of 50 to 55 HRC, the value of the notched impact strength increases to the value KCV = 0.400 to 0.650 MJ.m ” 2 . Also the value of relative resistance to abrasive wear is higher, W = 2.0 to 2.4.
Příklady provedení vynálezuExamples of embodiments of the invention
Vynález je dále popsán na dvou příkladech provedení:The invention is further described in two exemplary embodiments:
Příklad 1Example 1
Ocel na odlitky, určená na výrobu mezistěn a zuby drtičů a šnekůSteel for castings, intended for the production of partitions and teeth of crushers and augers
Prvek uhlík mangan křemík chróm nikl molybden fosfor síra hliník zirkonium bórElement carbon manganese silicon chromium nickel molybdenum phosphorus sulfur aluminum zirconium boron
Hmotnostní koncentrace [% hmot.] 0,38 0,71 1,02 3,05 0,85 0,35 0,028 0,018 0,081 0,030 0,004Mass concentration [% wt.] 0.38 0.71 1.02 3.05 0.85 0.35 0.028 0.018 0.081 0.030 0.004
Příklad 2Example 2
Prvek uhlík mangan křemík chróm nikl molybden fosfor síra hliník zirkonium bórElement carbon manganese silicon chromium nickel molybdenum phosphorus sulfur aluminum zirconium boron
Hmotnostní koncentrace [% hmot.] 0,31 0,66 1,53 1,82 1,53 0,30 0,028 0,020 0,028 0,030 0,004Weight concentration [% by weight] 0.31 0.66 1.53 1.82 1.53 0.30 0.028 0.020 0.028 0.030 0.004
Ze shora uvedených taveb byly vyrobeny vzorky pro laboratorní zkoušky a odlitky pro provozní zkoušky.Samples for laboratory tests and castings for operational tests were made from the above-mentioned melts.
Tepelné zpracování: vzorky byly žíhány na měkko při 720 °C 6 hodin a ochlazeny v peci. Kalení: ohřev na 880 °C, austenitizace 1 h, ochlazení v oleji. Popouštění při 400 °C po 2 hodiny, následovalo ochlazení ve vodě. Tvrdost 51 až 53 HRC, rázová vrubová houževnatost KCV = 0,45 až 0,58 MJ.m , pevnost v ohybu Rmo = 2 350 až 2 700 MPa, poměrná odolnost proti opotřebení podle ČSN 015084 ψ = 2,1 až 2,4.Heat treatment: samples were soft annealed at 720 ° C for 6 hours and cooled in an oven. Hardening: heating to 880 ° C, austenitization for 1 h, cooling in oil. Tempering at 400 ° C for 2 hours, followed by cooling in water. Hardness 51 to 53 HRC, impact notched toughness KCV = 0.45 to 0.58 MJ.m, flexural strength Rmo = 2,350 to 2,700 MPa, relative wear resistance according to ČSN 015084 ψ = 2.1 to 2.4 .
Průmyslová využitelnostIndustrial applicability
Ocel na odlitky s vysokou houževnatostí a odolností proti abrazivnímu opotřebení podle vynálezu je použitelná například pro zuby drtičů rud, šneky cihlářských lisů a podobně.The steel for castings with high toughness and abrasion wear resistance according to the invention is applicable, for example, to the teeth of ore crushers, screws of brick presses and the like.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS911042A CS104291A3 (en) | 1991-04-12 | 1991-04-12 | Steel for cast stock exhibiting high toughness and resistance to abrasivewear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS911042A CS104291A3 (en) | 1991-04-12 | 1991-04-12 | Steel for cast stock exhibiting high toughness and resistance to abrasivewear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS277285B6 true CS277285B6 (en) | 1992-12-16 |
| CS104291A3 CS104291A3 (en) | 1992-12-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS911042A CS104291A3 (en) | 1991-04-12 | 1991-04-12 | Steel for cast stock exhibiting high toughness and resistance to abrasivewear |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS104291A3 (en) |
-
1991
- 1991-04-12 CS CS911042A patent/CS104291A3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS104291A3 (en) | 1992-12-16 |
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