CN104831189B - HB600 level Micro Alloying wear-resisting steel plate and manufacture method thereof - Google Patents
HB600 level Micro Alloying wear-resisting steel plate and manufacture method thereof Download PDFInfo
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Abstract
The invention discloses a kind of HB600 level Micro Alloying wear-resisting steel plate and manufacture method thereof, it includes smelting, casts, heats, rolls and refrigerating work procedure；The weight/mass percentage composition of described steel plate chemical composition is: C 0.35～0.45%, Si 0.20～0.50%, Mn 1.20～1.60%, P≤0.015%, S≤0.01%, Cr 0.2～1.0%, Mo 0.1～0.5%, Ni 0.5～1.5%, Cu 1.0～2.0%, Ti≤0.2%, Nb≤0.2%, V≤0.2%, Al≤0.05%, N≤0.005%, O≤0.003%, B 0.001～0.005, rare earth 0～0.02%, remaining is ferrum and inevitable impurity.Carbon content microalloying thought in this method employing, it is properly added Cr, Ni, Cu, B etc. to have and improve the element of quenching degree effect and V etc. there is the element about precipitation strength, the quenching degree that it is high is utilized to obtain hard phase martensite under relatively low cooling rate, utilize the precipitation of a large amount of carboritrides that carbide former formed, improve hard phase content to increase substantially the anti-wear performance of steel plate；Containing alloying elements such as Cu, Ni, it is allowed to that there is excellent atmospheric corrosion resistance.
Description
Technical field
The present invention relates to a kind of wear-resisting steel plate, especially a kind of HB600 level Micro Alloying wear-resisting steel plate and manufacture method thereof.
Background technology
Abrasion-resistant stee is the class ferrous materials being widely used in all kinds of wear working condition, in the every field such as metallurgy, mine, building, electric power, agricultural, manufacture of cement, railway and military affairs, concrete such as bull-dozer, loader, excavator, dumper and various mining machinery, grab bucket, stacker-reclaimer, conveying warp architecture etc., Focusing on components includes excavator bucket teeth, ball grinding machine lining board, disintegrating machine Hubei Province plate, rolled mortar wall and tractor shoe etc., the wear extent of minimizing equipment can be played, extend the effect in its service life.
Along with plant equipment towards high-power, at high speed direction develop, and the application that plant equipment is under harsh operating mode, the abrasion making machine components is increasingly severe, not only maintenance cost increases, and the most whole plant equipment loss of function, developing high-level abrasion-resistant stee is an important development trend.
Current high-level abrasion-resistant stee all uses hardening and tempering process after hot rolling, the abrasion-resistant stee produced by hardening and tempering process, and the alloying element of required interpolation is few, and shortcoming is the increase in technique production cost, additionally makes the template of steel plate be difficult to control to, adds production difficulty.If carrying out modifier treatment after being machined to part again, part can be made to deform during quenching and it cannot be guaranteed that the dimensional accuracy of part and form accuracy.
About the mode of production introduction of abrasion-resistant stee in prior art, a kind of HB400 level anti-crack high strength martensitic abrasion-resistant stee provided such as publication number CN 103243277A and production method, which employs press quenching and add the process route manufacture HB400 grade wear-resisting steel plate of tempering；Remaining produces abrasion-resistant stee as CN 103540729 A, CN 103266269 all have employed hardening and tempering process in the patent publication such as A, CN102230135A, CN102676922A, CN103114252A, CN102943213A, and non-tempering process produces the method that hardness is HB600 abrasion-resistant stee and has no report.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of HB600 level Micro Alloying wear-resisting steel plate with good template；Present invention also offers the manufacture method of a kind of HB600 level Micro Alloying wear-resisting steel plate.
For solving above-mentioned technical problem, the weight/mass percentage composition of chemical composition of the present invention is: C 0.35～0.45%, Si 0.20～0.50%, Mn 1.20～1.60%, P≤0.015%, S≤0.01%, Cr 0.2～1.0%, Mo 0.1～0.5%, Ni 0.5～1.5%, Cu 1.0～2.0%, Ti≤0.2%, Nb≤0.2%, V≤0.2%, Al≤0.05%, N≤0.005%, O≤0.003%, B 0.001～0.005, rare earth 0～0.02%, remaining is ferrum and inevitable impurity.
In the chemical composition of the present invention, the effect of each element is as described below:
Carbon (C): realize the important element of phase transformation strengthening in abrasion-resistant stee, can significantly improve intensity and the hardness of steel, it is achieved higher wearability.But, the carbon of too high amount weakens toughness and the welding performance of steel.Therefore, select carbon content control in the range of 0.35～0.45%.
Silicon (Si): the effect in steel is mainly solution strengthening.The Si of high level can improve the quenching degree of steel, adds Si and be conducive to improving intensity and the toughness of steel in general steel.It addition, Si can increase the austenite quantity reducing hydrogen diffusion velocity, and steel is made to be tempered at a higher temperature.Use alloying with silicon to form carbide-free Bainite and both can reduce the dislocation density in steel, the film of retained austenite in carbide-free Bainite can be utilized again to reduce hydrogen atom diffusion velocity in steel, thus improve the resistance for delayed fracture of unimach.Therefore, Si content is limited to 0.2～0.5% by the present invention.
Manganese (Mn): the effect in steel is solution strengthening and improves quenching degree, but the segregation of Mn tendency is higher, when Fe content is higher, there is the tendency making grain coarsening, and increase the crisp sensitivity of steel belt roof bolt, and be easily caused in strand and segregation and crackle occur, reduce the performance of steel plate.Therefore Mn content controls 1.2～1.6%.
Chromium (Cr): chromium can reduce critical cooling rate, improve the quenching degree of steel.Chromium can be formed (Fe, Cr) in steel3C, (Fe, Cr)7C3(Fe, Cr)23C7Etc. multiple carbide, improve intensity and hardness.Chromium can stop when tempering or slow down precipitation and the gathering of carbide, can improve steel belt roof bolt stability.Chromium content controls in the range of 0.2～1.0%.
Molybdenum (Mo): quenching degree, crystal grain thinning can be improved, improve intensity and toughness.Molybdenum is present in solid solution phase and Carbide Phases in steel, therefore, has the effect of solution strengthening and carbide dispersion-strengthened containing molybdenum steel simultaneously.Molybdenum is the element reducing temper brittleness, can improve tempering stable.Its content controls in the range of 0.1～0.5%.
Nickel (Ni): critical cooling rate, the quenching degree of raising steel can be reduced.Nickel, in the range of 0.5～1.5%, can dissolve each other with ferrum in any proportion, is improved the low-temperature flexibility of steel by fining ferrite grains, and has the effect substantially reducing Cold Brittleness Transition Temperature.For the high-level and abrasion-resistant stee of high/low temperature toughness, nickel is highly beneficial addition element.But too high levels is easily caused surface of steel plate oxide skin to be difficult to come off, and cost dramatically increases, therefore need to control its content.
Copper (Cu): copper outstanding role in steel is the weather-resistant performance improving ordinary low-alloy steel, particularly with phosphorus with the use of time, add copper and can also improve intensity and the yield ratio of steel, and welding performance is not adversely influenced.The stability of austenite in steel can be improved, so hardenability and quenching degree can be improved, have the effect of reinforced ferrite, ferrite adds Cu, its corrosion resistance in some reductant can be improved and improve the toughness of steel.When copper content is more than 0.75%, ageing strengthening effect can be produced after solution treatment and timeliness.Copper is similar to nickel with the impact of quenching degree and its solution strengthening effect on critical temperature, can be used to replace a part of nickel.Its content controls in the range of 1.0～2.0%.
Boron (B): boron Main Function in steel is to increase the quenching degree of steel, thus save other diluter expensive metals, such as nickel, chromium, molybdenum etc., it can substitute for the nickel of 1.6%, the chromium of 0.3% or the molybdenum of 0.2%, it should be noted that because molybdenum can prevent or reduces temper brittleness with boron for molybdenum, and boron slightly promotes the tendency of temper brittleness, so molybdenum can not be replaced completely with boron.Its content controls in the range of 0.001%～0.005%.
Rare earth: rare earth element can improve plasticity and the cutting property of impact of forging rolling steel, particularly especially pronounced in cast steel.It can also improve the creep-resistant property of heat resisting steel, electrothermal alloy and high temperature alloy.Rare earth element can also improve non-oxidizability and the corrosion resistance of steel.The effect of non-oxidizability exceedes the elements such as silicon, aluminum, titanium.It can improve the mobility of steel, reduces nonmetal inclusion, makes structure of steel fine and close, pure.Ordinary low-alloy steel adds appropriate rare earth element, has good deoxidation desulfuration, impact flexibility (particularly low-temperature flexibility) can be improved, improve anisotropic properties.Its content controls in the range of 0～0.02%.
Vanadium (V): vanadium and carbon, nitrogen, oxygen have extremely strong affinity, form corresponding stable compound therewith.Vanadium main form with carbide in steel exists.Its Main Function is tissue and the crystal grain of refinement steel.Reduce the superheated susceptivity of steel, improve intensity and the toughness of steel.When dissolving in solid solution at high temperature, increase quenching degree；Otherwise, in the presence of with carbide morphology, reduce quenching degree.Vanadium increases the temper resistance of hardened steel, and produces post-curing effect.Its content controls in the range of 0～0.2%.
Aluminum (Al): aluminum and nitrogen in steel can form the AlN granule of tiny indissoluble, refinement microstructure.Aluminum is not only deoxidizer, also has the effect promoting that metastable austenite is formed.Aluminum can suppress and delay the carbide of overcooling austenite to decompose, and improves toughness.Its content controls in the range of 0～0.05%.
Phosphorus (P) and sulfur (S): in abrasion-resistant stee, sulfur and phosphorus are harmful element, and their content strictly to control, and in steel grade involved in the present invention, phosphorus content is less than 0.015%, and sulfur content is less than 0.01%.
The inventive method includes smelting, casts, heats, rolls and refrigerating work procedure；The weight/mass percentage composition of described steel plate chemical composition is described above；
Described heating process: heating and temperature control is at 1200～1250 DEG C；
Described rolling process；Roughing start rolling temperature 1100～1150 DEG C, finishing temperature 1000～1050 DEG C；Finish rolling adds up reduction ratio not less than 50%, and last three percentage pass reductions are not less than 10%, finish rolling start rolling temperature 980～1030 DEG C, finishing temperature 850～950 DEG C；
Described refrigerating work procedure: use air cooling or section cooling；In described section cooling, open cold temperature 800～900 DEG C, air cooling after being cooled to 400～500 DEG C.
In refrigerating work procedure described in the inventive method, air cooling is cold bed cooling.
In rolling process described in the inventive method, after finish rolling, steel plate thickness is 8～50mm.
Use and have the beneficial effects that produced by technique scheme: carbon content microalloying thought in present invention employing, it is properly added Cr, Ni, Cu, B etc. to have and improve the element of quenching degree effect and V etc. there is the element about precipitation strength, the quenching degree that it is high is utilized to obtain hard phase martensite under relatively low cooling rate, utilize the precipitation of a large amount of carboritrides that carbide former formed, improve hard phase content to increase substantially the anti-wear performance of steel plate；Owing to containing alloying elements such as Cu, Ni, making the type abrasion-resistant stee have excellent atmospheric corrosion resistance.
The abrasion-resistant stee that the inventive method produces has good atmospheric corrosion resistance ability；Hardness reaches HB600 rank, has high-performance；Have employed non-tempering process, it is ensured that good template, reduce production difficulty at a lower cost, be greatly improved production efficiency.
Accompanying drawing explanation
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is the microstructure picture of the present invention.
Detailed description of the invention
Composition proportion and the manufacture method of embodiment 1: this HB600 level Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this HB600 level Micro Alloying wear-resisting steel plate is by mass percentage: C 0.44%, Si 0.50%, Mn 1.5%, P
0.007%, S 0.002%, Cr 1.0%, Mo 0.15%, Ni 0.5%, Cu
1.9%, Al 0.04%, B 0.002%, rare earth 0.002%, remaining is Fe and inevitable impurity；Thickness is 30mm.
Above chemical composition carries out melting by mass percentage and is cast into ingot casting, and strand rolls front heating, and heating-up temperature is 1230 DEG C, and heat time heating time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature is at 1150 DEG C, and finishing temperature 1050 DEG C, it is 51.5% that roughing adds up reduction ratio；Finish rolling start rolling temperature is 1030 DEG C, and finishing temperature is at 950 DEG C, and finish rolling adds up reduction ratio 60%, and last three percentage pass reductions are not less than 10%, and the thickness of slab after finish rolling is 30mm, by the steel plate air cooling after rolling to room temperature, i.e. can get described HB600 level Micro Alloying wear-resisting steel plate.The section Brinell hardness of the present embodiment gained wear-resisting steel plate is HB620；Its microstructure picture is shown in Fig. 1, and microscopic structure is essentially martensite as shown in Figure 1.With the weather-proof contrast test that 10PCuRe has carried out 120h, the present embodiment gained wear-resisting steel plate weight-loss corrosion speed is 0.0228mg/cm2/ h, 10PCuRe weight-loss corrosion speed is 0.223mg/cm2/h。
Composition proportion and the manufacture method of embodiment 2: this HB600 level Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this HB600 level Micro Alloying wear-resisting steel plate is by mass percentage: C 0.45%, Si 0.40%, Mn 1.3%, P
0.009%, S 0.002%, Cr 0.95%, Mo 0.1%, Ni 0.6%, Cu 2.0%, Ti 0.1%, Al 0.02%, B 0.003%, rare earth 0.002%, remaining is Fe and inevitable impurity；Thickness is 8mm.
Above chemical composition carries out melting by mass percentage and is cast into ingot casting, and strand rolls front heating, and heating-up temperature is 1225 DEG C, and heat time heating time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature is at 1130 DEG C, and finishing temperature 1040 DEG C, it is 72.1% that roughing adds up reduction ratio；Finish rolling start rolling temperature is 1010 DEG C, and finishing temperature is at 880 DEG C, and finish rolling adds up reduction ratio 82.6%, and last three percentage pass reductions are not less than 10%, and the thickness of slab after finish rolling is 8mm；Cold temperature 850 DEG C opened by steel plate after rolling, and after being cooled to 400 DEG C, air cooling is to room temperature, i.e. can get described HB600 level Micro Alloying wear-resisting steel plate.The section Brinell hardness of the present embodiment gained wear-resisting steel plate is HB634.With the weather-proof contrast test that 10PCuRe has carried out 120h, the present embodiment gained wear-resisting steel plate weight-loss corrosion speed is 0.0229mg/cm2/ h, 10PCuRe weight-loss corrosion speed is 0.223mg/cm2/h。
Composition proportion and the manufacture method of embodiment 3: this HB600 level Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this 600HB level Micro Alloying wear-resisting steel plate is by mass percentage: C 0.35%, Si 0.30%, Mn 1.6%, P
0.005%, S 0.006%, Cr 0.3%, Mo 0.3%, Ni 1.2%, Cu
1.2%, Nb 0.2%, V 0.1%, B 0.001%, rare earth 0.001%, remaining is Fe and inevitable impurity；Thickness is 50mm.
Above chemical composition carries out melting by mass percentage and is cast into ingot casting, and strand rolls front heating, and heating-up temperature is 1200 DEG C, and heat time heating time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature is at 1120 DEG C, and finishing temperature 1030 DEG C, it is 51. that roughing adds up reduction ratio
5%；Finish rolling start rolling temperature is 1000 DEG C, and finishing temperature is at 920 DEG C, and finish rolling adds up reduction ratio 50%, and last three percentage pass reductions are not less than 10%, and the thickness of slab after finish rolling is 50mm；Cold temperature 900 DEG C opened by steel plate after rolling, and after water-cooled to 500 DEG C, air cooling is to room temperature, i.e. can get described HB600 level Micro Alloying wear-resisting steel plate.The section Brinell hardness of the present embodiment gained wear-resisting steel plate is HB600.With the weather-proof contrast test that 10PCuRe has carried out 120h, the present embodiment gained wear-resisting steel plate weight-loss corrosion speed is 0.0238mg/cm2/ h, 10PCuRe weight-loss corrosion speed is 0.223mg/cm2/h。
Composition proportion and the manufacture method of embodiment 4: this HB600 level Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this HB600 level Micro Alloying wear-resisting steel plate is by mass percentage: C 0.40%, Si 0.35%, Mn 1.4%, P 0.015%, S 0.004%, Cr 0.2%, Mo
0.2%, Ni 1.5%, Cu 1.6%, Ti 0.2%, Nb 0.1%, Al 0.05%, N 0.005%, B 0.004%, rare earth 0.002%, remaining is Fe and inevitable impurity；Thickness is 15mm.
Above chemical composition carries out melting by mass percentage and is cast into ingot casting, and strand rolls front heating, and heating-up temperature is 1220 DEG C, and heat time heating time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature is at 1100 DEG C, and finishing temperature 1050 DEG C, it is 72.1% that roughing adds up reduction ratio；Finish rolling start rolling temperature is 990 DEG C, and finishing temperature is at 920 DEG C, and finish rolling adds up reduction ratio 82.6%, and last three percentage pass reductions are not less than 10%, and the thickness of slab after finish rolling is 15mm, by the steel plate air cooling after rolling to room temperature, i.e. can get described 600HB level Micro Alloying wear-resisting steel plate.The section Brinell hardness of the present embodiment gained wear-resisting steel plate is HB600.With the weather-proof contrast test that 10PCuRe has carried out 120h, the present embodiment gained wear-resisting steel plate weight-loss corrosion speed is 0.0232mg/cm2/ h, 10PCuRe weight-loss corrosion speed is 0.223mg/cm2/h。
Composition proportion and the manufacture method of embodiment 5: this HB600 level Micro Alloying wear-resisting steel plate are as described below.
The chemical composition of this 600HB level Micro Alloying wear-resisting steel plate is by mass percentage: C 0.38%, Si 0.42%, Mn 1.6%, P 0.010%, S 0.01%, Cr 0.6%, Mo
0.5%, Ni 0.9%, Cu 1.0%, V 0.2%, Al 0.01%, O 0.003%, B 0.005%, remaining is Fe and inevitable impurity；Thickness is 8mm.
Above chemical composition carries out melting by mass percentage and is cast into ingot casting, and strand rolls front heating, and heating-up temperature is 1250 DEG C, and heat time heating time is 3 hours.Using two benches controlled rolling, roughing start rolling temperature is at 1140 DEG C, and finishing temperature 1040 DEG C, it is 72.1% that roughing adds up reduction ratio；Finish rolling start rolling temperature is 980 DEG C, and finishing temperature is at 850 DEG C, and finish rolling adds up reduction ratio 82.6%, and last three percentage pass reductions are not less than 10%, and the thickness of slab after finish rolling is 8mm；Cold temperature 800 DEG C opened by steel plate after rolling, and water-cooled to 450 DEG C then air cooling, to room temperature, i.e. can get described HB600 level Micro Alloying wear-resisting steel plate.The section Brinell hardness of the present embodiment gained wear-resisting steel plate is HB615.With the weather-proof contrast test that 10PCuRe has carried out 120h, the present embodiment gained wear-resisting steel plate weight-loss corrosion speed is 0.0245mg/cm2/ h, 10PCuRe weight-loss corrosion speed is 0.223mg/cm2/h。
Claims (3)
1. the manufacture method of a HB600 level Micro Alloying wear-resisting steel plate, it is characterised in that: it includes smelting, casts, heats, rolls and refrigerating work procedure；The weight/mass percentage composition of described steel plate chemical composition is: C 0.35～0.45%, Si 0.20～0.50%, Mn 1.20～1.60%, P≤0.015%, S≤0.01%, Cr 0.2～1.0%, Mo 0.1～0.5%, Ni 0.5～1.5%, Cu 1.0～2.0%, Ti≤0.2%, Nb≤0.2%, V≤0.2%, Al≤0.05%, N≤0.005%, O≤0.003%, B 0.001～0.005%, rare earth 0～0.02%, remaining is ferrum and inevitable impurity；
Described heating process: heating and temperature control is at 1200～1250 DEG C；
Described rolling process；Roughing start rolling temperature 1100～1150 DEG C, finishing temperature 1000～1050 DEG C；Finish rolling adds up reduction ratio not less than 50%, and last three percentage pass reductions are not less than 10%, finish rolling start rolling temperature 980～1030 DEG C, finishing temperature 850～950 DEG C；
Described refrigerating work procedure: use air cooling or section cooling；In described section cooling, open cold temperature 800～900 DEG C, air cooling after being cooled to 400～500 DEG C.
The manufacture method of HB600 level Micro Alloying wear-resisting steel plate the most according to claim 1, it is characterised in that: in described refrigerating work procedure, air cooling is cold bed cooling.
The manufacture method of HB600 level Micro Alloying wear-resisting steel plate the most according to claim 1 and 2, it is characterised in that: in described rolling process, after finish rolling, steel plate thickness is 8～50mm.
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| CN108220811A (en) * | 2018-01-04 | 2018-06-29 | 河南科技大学 | A kind of abrasion-resistant stee and preparation method thereof |
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| CN108754330A (en) * | 2018-06-21 | 2018-11-06 | 武汉钢铁有限公司 | 550 grade wear-resisting steel of Brinell hardness and manufacturing method |
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| CN115418590B (en) * | 2022-08-31 | 2023-08-29 | 马鞍山钢铁股份有限公司 | High-strength and high-toughness non-quenched and tempered steel with good corrosion resistance for wind power bolts and production method thereof |
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| SU1014971A1 (en) * | 1981-11-04 | 1983-04-30 | Институт проблем литья АН УССР | Foundary steel |
| JP4645307B2 (en) * | 2005-05-30 | 2011-03-09 | Ｊｆｅスチール株式会社 | Wear-resistant steel with excellent low-temperature toughness and method for producing the same |
| CN102181794B (en) * | 2011-04-14 | 2013-04-03 | 舞阳钢铁有限责任公司 | Hardening and tempering high-strength steel plate for wood based panel equipment and production method of tempering high-strength steel plate |
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