CN103060689A - Preparation method of wear-resisting steel plate for mining machinery - Google Patents
Preparation method of wear-resisting steel plate for mining machinery Download PDFInfo
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- CN103060689A CN103060689A CN2012105950976A CN201210595097A CN103060689A CN 103060689 A CN103060689 A CN 103060689A CN 2012105950976 A CN2012105950976 A CN 2012105950976A CN 201210595097 A CN201210595097 A CN 201210595097A CN 103060689 A CN103060689 A CN 103060689A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000005065 mining Methods 0.000 title claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 238000009749 continuous casting Methods 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 9
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 229910052720 vanadium Inorganic materials 0.000 claims description 10
- 238000005496 tempering Methods 0.000 claims description 9
- 238000010791 quenching Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 229910052746 lanthanum Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 241001062472 Stokellia anisodon Species 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 230000003009 desulfurizing effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000007669 thermal treatment Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000013589 supplement Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 239000010936 titanium Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 229910052750 molybdenum Inorganic materials 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 1
- 229910017083 AlN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a preparation method of a wear-resisting steel plate for mining machinery. Wear-resisting alloy steel comprises C, Si, Mn, P, S, La, V, Ti, N, Al, B, Fe and inevitable impurities. The preparation method comprises the following steps: 1) smelting; 2) continuous casting; 3) rolling; and 4) heat treatment. Alloy elements of the steel plate supplement one another and cooperate, so that the hardness of the wear-resisting steel is improved, the brinell hardness value of the wear-resisting steel can reach HB580-620, the favorable wear resistance can be ensured, the tensile strength is not less than 1,200 MPa, the elongation is larger than 8 percent, and the obdurability is good.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, particularly a kind of mining machinery preparation method of wear-resisting steel plate.
Background technology
It is abominable especially that wear-resisting steel plate is widely used in working conditions, requires on the engineering goods such as high strength, high-wear resistance.Such as various mining machineries, grab bucket, stacker-reclaimer, conveying warp architecture etc.Therefore, this kind wear-resisting steel plate requires to have higher hardness.The present general alloy content of domestic wear resisting steel is higher, although can satisfy the requirement of hardness, plasticity and toughness are relatively relatively poor, affected to a certain extent its application on different mechanical fields.
Before the present invention, " a kind of ultrahigh-strength wear-resistant steel and production method thereof " patent of Wuhan Iron and Steel Company's invention, the composition range of this steel is: C 0.10-0.17%, Si 0.25-0.50%, Mn 1.20-1.50%, P≤0.018%, S≤0.008%, Cr 0.20-0.50%, Ni 0.25-0.50%, Mo 0.10-0.40%, Als 0.02-0.06%, B≤0.005%, RE≤150g/ ton steel; This steel adopts controlled rolling+modified production technique, does not contain V in this composition of steel, and tensile strength is 1300MPa approximately, and Brinell hardness number HB reaches about 400.But this steel contains the noble metal elements such as higher Ni, Mo, and cost is relatively high.
Also have " a kind of high-strength abrasion-proof plate and preparation method thereof " and " a kind of quenching and tempering type abrasion resistant steel and heat treating method thereof " patent of Wuyang Iron And Steel Company invention, its composition is respectively: C0.12-0.16%, Si0.10-0.70%, Mn0.90-1.50%, P≤0.020%, S≤0.010%, Cr0.20-0.70%, Ni0.05-0.30%, V0.03-0.08%, Nb0.01-0.06%, Mo0.10-0.50%, Ti0.01-0.06%, Al0.02-0.08%, B0.0005-0.0030% and C0.14-0.18%, Si0.20-0.40%, Mnl.20-1.40%, P≤0.015%, S≤0.005%, Cr0.50-0.70%, Ni0.40-0.55%, V 0.03-0.08%, Nb 0.02-0.03%, Ti 0.015-0.030%, Mo 0.40-0.50%, Al0.02-0.045%, B 0.0015-0.0030%; All add Nb, Ni, the precious metal elements such as Mo, V of different content in the composition of two patents, greatly increased production cost.Wherein also contain Cu in second patent, the cost of two patents is all higher.The tempering temperature of first patent belongs to low-temperaturetempering at 150-250 ℃, and normal industrial tempering temperature is at 400-700 ℃, and organization of production and control are all difficult in the industrial production in batches, have greatly affected the normal production of heat treatment furnace.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to provide the preparation method of a kind of mining machinery with wear-resisting steel plate, and the steel plate of the method preparation has good obdurability, higher hardness, and wear resisting property is excellent, and cost is low.
For achieving the above object, the present invention adopts following technical scheme:
A kind of mining machinery preparation method of wear-resisting steel plate is characterized in that described wear-resisting alloy steel is comprised of following component in (weight) per-cent: C:0.7-0.9%, Si:0.6-0.8%, Mn:1.6-1.8%, P≤0.02%, S≤0.005%, La:0.04-0.06%, V:0.2-0.3%, Ti:0.2-0.4%, N:0.02-0.04%, Al:0.02-0.06%, B:0.003-0.005%, all the other are iron Fe and inevitable impurity, and described preparation method is:
1) smelt: comprise desulfurizing iron, the converter top bottom blowing, vacuum-treat, adjusting component satisfies above-mentioned requirements, and the control tapping temperature is approximately 1540-1580 ℃;
2) continuous casting: control Metal in Tundish superheating temperature is approximately 25-45 ℃, and continuous casting becomes base;
3) rolling: slab heating temperature is approximately 1210-1230 ℃, and start rolling temperature is approximately 1150-1170 ℃, and finishing temperature is approximately 900-920 ℃, and rolling rear control speed of cooling is approximately 15-25 ℃/second; Control is cooled to approximately 400-450 ℃;
About 4) thermal treatment: quenching temperature 980-1010 ℃, heat-up time 3.5-4.5min/mm * thickness of slab; About 220-240 ℃ of tempering holding temperature, soaking time 5-6min/mm * thickness of slab.
The Cr that all contains high level in the wear resisting steel of prior art, although the Cr element can significantly improve the hardness of steel, and can improve wear resisting property, itself and carbon easily form thick carbide, thereby significantly reduce the toughness of steel, so do not add the Cr element in the wear resisting steel of the present invention.
Carbon content design during steel of the present invention adopts, intensity, hardness and the wear resistance by carbon raising steel itself on the one hand forms hardness and the wear resisting property that an amount of carbide significantly improves steel by carbon and other alloying elements such as titanium, vanadium on the other hand.
On the basis of great many of experiments, V, Ti, N, the Al in the steel of the present invention, the alloy element content of B have been determined, between these alloying elements and and carbon between form the compounds such as titanium carbide, vanadium carbide, vanadium three nitrogen, titanium boride, aluminium nitride, so that the hardness of steel and wear-resisting increasing substantially, simultaneously by cooling controlling and rolling controlling process and control heat treated quenching and tempering process so that these compounds and disperse be distributed in the steel so that the toughness of steel improves.
The present invention adds an amount of rare-earth elements of lanthanum, so that it can cooperate form and the distribution that improves above-claimed cpd, thereby indirectly assists obdurability and the wear resistance that improves steel.
In sum, the above-mentioned alloying element in the steel of the present invention complements each other, synergy.So that the hardness of wear resisting steel of the present invention improves, its Brinell hardness number can reach HB580-620, can guarantee good wear resisting property.Its tensile strength is no less than 1200MPa, and unit elongation is greater than 8%, and as seen its obdurability is good.
Above-mentioned preparation method of the present invention is by accurate control various processes, and the processing parameter of rolling and heat treatment step particularly is so that the design performance of steel of the present invention is given full play to.
Embodiment
Further specify the present invention below by embodiment, but the invention is not restricted to following embodiment.
Embodiment one
A kind of mining machinery preparation method of wear-resisting steel plate, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.7%, Si:0.8%, Mn:1.6%, P≤0.02%, S≤0.005%, La:0.06%, V:0.2%, Ti:0.4%, N:0.02%, Al:0.06%, B:0.003%, all the other are iron Fe and inevitable impurity, described preparation method is:
1) smelt: comprise desulfurizing iron, the converter top bottom blowing, vacuum-treat, adjusting component satisfies above-mentioned requirements, and the control tapping temperature is 1540 ℃;
2) continuous casting: control Metal in Tundish superheating temperature is 25 ℃, and continuous casting becomes base;
3) rolling: slab heating temperature is 1210 ℃, and start rolling temperature is 1170 ℃, and finishing temperature is 900 ℃, and rolling rear control speed of cooling is 25 ℃/second; Control is cooled to 400 ℃;
4) thermal treatment: 980 ℃ of quenching temperatures, heat-up time 4.5min/mm * thickness of slab; 220 ℃ of tempering holding temperatures, soaking time 6min/mm * thickness of slab.
Embodiment two
A kind of mining machinery preparation method of wear-resisting steel plate, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.9%, Si:0.6%, Mn:1.8%, P≤0.02%, S≤0.005%, La:0.04%, V:0.3%, Ti:0.2%, N:0.04%, Al:0.02%, B:0.005%, all the other are iron Fe and inevitable impurity, described preparation method is:
1) smelt: comprise desulfurizing iron, the converter top bottom blowing, vacuum-treat, adjusting component satisfies above-mentioned requirements, and the control tapping temperature is 1580 ℃;
2) continuous casting: control Metal in Tundish superheating temperature is 45 ℃, and continuous casting becomes base;
3) rolling: slab heating temperature is 1230 ℃, and start rolling temperature is 1150 ℃, and finishing temperature is 920 ℃, and rolling rear control speed of cooling is 15 ℃/second; Control is cooled to 450 ℃;
4) thermal treatment: 1010 ℃ of quenching temperatures, heat-up time 3.5min/mm * thickness of slab; 240 ℃ of tempering holding temperatures, soaking time 5min/mm * thickness of slab.
Embodiment three
A kind of mining machinery preparation method of wear-resisting steel plate, described wear-resisting alloy steel is comprised of following component by weight percentage: C:0.8%, Si:0.7%, Mn:1.7%, P≤0.02%, S≤0.005%, La:0.05%, V:0.25%, Ti:0.3%, N:0.03%, Al:0.04%, B:0.004%, all the other are iron Fe and inevitable impurity, described preparation method is:
1) smelt: comprise desulfurizing iron, the converter top bottom blowing, vacuum-treat, adjusting component satisfies above-mentioned requirements, and the control tapping temperature is 1560 ℃;
2) continuous casting: control Metal in Tundish superheating temperature is 35 ℃, and continuous casting becomes base;
3) rolling: slab heating temperature is 1220 ℃, and start rolling temperature is 1160 ℃, and finishing temperature is 910 ℃, and rolling rear control speed of cooling is 20 ℃/second; Control is cooled to 425 ℃;
4) thermal treatment: 995 ℃ of quenching temperatures, heat-up time 4min/mm * thickness of slab; 230 ℃ of tempering holding temperatures, soaking time 5.5min/mm * thickness of slab.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that namely the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (1)
1. the preparation method of a mining machinery usefulness wear-resisting steel plate is characterized in that, described wear-resisting alloy steel is comprised of following component in (weight) per-cent: C:0.7-0.9%, Si:0.6-0.8%, Mn:1.6-1.8%, P≤0.02%, S≤0.005%, La:0.04-0.06%, V:0.2-0.3%, Ti:0.2-0.4%, N:0.02-0.04%, Al:0.02-0.06%, B:0.003-0.005%, all the other are iron Fe and inevitable impurity, and described preparation method is:
1) smelt: comprise desulfurizing iron, the converter top bottom blowing, vacuum-treat, adjusting component satisfies above-mentioned requirements, and the control tapping temperature is approximately 1540-1580 ℃;
2) continuous casting: control Metal in Tundish superheating temperature is approximately 25-45 ℃, and continuous casting becomes base;
3) rolling: slab heating temperature is approximately 1210-1230 ℃, and start rolling temperature is approximately 1150-1170 ℃, and finishing temperature is approximately 900-920 ℃, and rolling rear control speed of cooling is approximately 15-25 ℃/second; Control is cooled to approximately 400-450 ℃;
About 4) thermal treatment: quenching temperature 980-1010 ℃, heat-up time 3.5-4.5min/mm * thickness of slab; About 220-240 ℃ of tempering holding temperature, soaking time 5-6min/mm * thickness of slab.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104372259A (en) * | 2014-11-08 | 2015-02-25 | 江苏天舜金属材料集团有限公司 | Method for processing wear-resistant-type reinforcing steel bar connecting sleeve |
| CN103469077B (en) * | 2013-09-30 | 2015-12-02 | 济钢集团有限公司 | A kind of high silicon rolled sheet material and preparation technology thereof |
| CN105316572A (en) * | 2015-11-25 | 2016-02-10 | 怀宁县明月矿山开发有限责任公司 | Wear-resistant steel plate for mining machinery |
| CN106544582A (en) * | 2016-12-01 | 2017-03-29 | 河池市技术开发中心 | A kind of preparation method of high-strength steel sheet |
| CN109207859A (en) * | 2018-11-27 | 2019-01-15 | 汪杨志 | A kind of Wear-resisting steel plate for mining machinery |
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| CN109207859A (en) * | 2018-11-27 | 2019-01-15 | 汪杨志 | A kind of Wear-resisting steel plate for mining machinery |
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| CN103060689B (en) | 2015-07-15 |
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