CN102925820B - Aluminum-containing high-boron high-speed steel roller material and smelting method thereof - Google Patents
Aluminum-containing high-boron high-speed steel roller material and smelting method thereof Download PDFInfo
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Abstract
The invention relates to an aluminum-containing high-boron high-speed steel roller material and a smelting method thereof, belonging to the technical field of roller materials. The aluminum-containing high-boron high-speed steel roller material comprises the following chemical components in percentage by mass: 0.35-0.55% of C, 3.2-3.4% of B, 5.5-6.0% of Cr, less than 0.85% of Si, less than 0.35% of Mn, 0.5-0.7% of V, 0.7-0.9% of Ni, 1.0-3.0% of W, 1.0-2.0% of Mo (3.8%<=(W+2Mo)<=5.2%), 3.7-3.9% of Al, 0.03-0.06% of Ce, 0.03-0.06% of La (0.06%<(La+Ce)<=0.10%), 0.12-0.15% of N, 0.05-0.08% of Ca, 0.04-0.10% of Mg, less than 0.03% of S, less than 0.04% of P and the balance of Fe. The smelting method comprises the following steps: smelting with an electric furnace, forming by a casting method, quenching, tempering and finishing. The roller material has high room-temperature/high-temperature hardness and favorable high-temperature wear resistance.
Description
Technical field
The invention discloses a kind of high speed steel roll material and smelting process, disclose especially a kind of aluminium high boron high-speed steel roll material and smelting process of containing, belong to roll material technical field.
Background technology
Common high carbon and vanadium high speed steel roll has excellent wear resistance, but exists more than precious alloy element add-on and the high deficiency of production cost, applies very difficult.Boron is a kind of alloying element of cheapness, adds high-speed steel roll, can partly replace the alloying elements such as vanadium, niobium, tungsten, molybdenum, reduces the cost of high carbon and vanadium high speed steel roll material.Chinese invention patent CN101797630A discloses a kind of modified high-speed steel roller and preparation method thereof, adopts centrifugal composite casting method to be shaped, and skin of the roll is rapid steel, and roll internal layer is magnesium iron or meehanite cast iron.Skin of the roll is shaped on centrifugal casting machine, then roller core molten iron is filled out to core under static state, pours into compound high speed steel roll.It is M2 rapid steel (W6Mo5Cr4V2) steel scrap of (massfraction): 60-65% that the outer field raw material of high-speed steel roll forms, the metallic aluminium of 1.0-1.4%, the ferro-boron of 5.0-5.5%, the carbon ferrochrome of 9.2-9.4%, the ferrotianium of 0.2-0.4%, the nickel magnesium alloy of 1.0-1.2%, the Q235 steel scrap of 18-23%.Chinese invention patent CN101177753 also discloses a kind of melt treating method of the high-vanadium high-speed steel roller material for all kinds of rolling mills, when molten steel is come out of the stove, with stream, adds vanadium iron particle, and its add-on accounts for the 0.80-1.20% of molten steel gross weight.Molten steel pours before casting ladle, in casting ladle, add in advance Yttrium base rare earth magnesium alloy, nitrided ferro-chromium, sylvite and metallic aluminium, wherein Yttrium base rare earth magnesium alloy add-on accounts for the 0.30-0.80% of Metal Weight, nitrided ferro-chromium add-on accounts for the 0.20-0.50% of Metal Weight, sylvite add-on accounts for the 0.30-0.80% of Metal Weight, and metallic aluminium add-on accounts for the 0.30-0.60% of Metal Weight.When liquid steel temperature reaches 1450-1480 ℃, on whizzer, directly pour into roll, in pouring molten steel process, the vanadium iron and the Ferrotitanium particle that with stream, add particle size 5mm-8mm, wherein vanadium iron particle add-on accounts for the 0.30-0.80% of molten steel total amount, and Ferrotitanium particle add-on accounts for the 0.40-1.00% of molten steel total amount.The high-vanadium high-speed steel roller segregation of this invention rotary casting is light, and without casting crack, hardness is high, and wear resistance is good.Chinese invention patent CN102107215A also discloses a kind of resource-saving boron-containing high-speed steel composite roll and preparation method thereof, by outer and roller core two portions, by centrifugal composite casting, is formed.Its outer various raw materials form: the alloy iron filings of the alloy iron filings of 35-40% high-speed steel roll, the alloy iron filings of 20-25% high-chromium iron-cast roller, 15-20% high Ni-Cr infinite cold hardness cast iron roll, 4-8% tungsten slag iron alloy, 1.0-1.5% ferro-boron, 1.0-1.2% low carbon ferromanganese, 0.15-0.25% ferrotianium, 0.2-0.3% yttrium-based heavy rare earth ferro-silicon alloy, 0.25-0.30% nitrided ferro-chromium, 0.2-0.3% magnesium-aluminum-calcium alloy, surplus is low-carbon waste steel sheet.Roller core is spheroidal graphite cast iron.This invention composite roll has good comprehensive mechanical property and wear resistance, and take Roller Machining residue as main raw material, has and economizes on resources and the feature such as with low cost, applies and has good economic and social benefit.Chinese invention patent CN101812646A also discloses the casting technique of High Speed Steel for Roller alloy, this technique first adopts fast quenching to get rid of band method and makes respectively laminar nanocrystalline rare-earth ferrosilicon nucleating agent and laminar nanocrystalline ferro-boron fining agent, use again the alterant breaker roll being formed by this nanocrystalline rare-earth ferrosilicon nucleating agent and nanocrystalline ferro-boron fining agent to carry out crystal grain with high-speed steel alloy tissue and structure refinement is processed, to overcome the defect of high-speed steel alloy casting, significantly refinement its matrix grain make carbide suspension, thereby improved significantly the comprehensive mechanical property of prepared high-speed steel roll.Chinese invention patent CN101445892 also discloses a kind of high boron high-speed steel roll material, the chemical composition of this invention roll material is (% by weight): 0.25～0.40C, 1.8～2.5B, 3.8～4.2Cr, 1.0～2.0W, 1.0～2.0Mo, 0.8～1.0V, 1.5～1.8Si, 0.2～0.4Al, 0.25～0.40Ti, 0.05～0.20RE, 0.02～0.05Zr, 0.5～0.8Cu, Mn < 0.5, P < 0.04, S < 0.04, surplus is Fe, the summation of chemical composition is 100%, 3.5 < W+2Mo < 5.2 wherein.It is low that this invention roll material has cost, long service life, the advantages such as good combination property.Chinese invention patent CN102409267A also discloses a kind of boron-containing high speed steel roller and preparation method thereof, chemical quality forms: 0.95-1.15C, 8.5-9.0Cr, 1.0-1.2Mo, 0.5-0.8W, 0.5-0.8V, 0.4-0.6B, 1.6-1.8Al, 0.18-0.25N, 0.4-0.6Cu, 1.2-1.4Si, 0.06-0.10RE, 0.03-0.06Mg, 0.04-0.08Ti, 0.025-0.045K, 0.025-0.045Na, 0.02-0.04Te, 0.02-0.04Bi, < 0.5Mn, < 0.025S, < 0.030P, surplus is Fe and inevitable trace impurity.Utilize electric furnace to produce, there is the features such as roll surface hardness is high, wear resistance good and roll neck intensity is high, good toughness.Chinese invention patent CN102615106A also discloses a kind of boracic centrifugal compound high-speed steel roll, comprise high-speed steel roll skin, high-speed steel roll middle layer and high-speed steel roll core, this preparation method comprises melting, stokehold processing, roll cast, annealing, roughing, double tempering, precision work, check.By the way, the boracic centrifugal compound high-speed steel roll that this invention provides has adopted three layers of composite roll technology, the compound ability that has increased high-speed steel roll skin and high-speed steel roll core, incrust, hardness intensity is high, wear resistance good, anti-accident ability is strong, this preparation method is simple, saved quench hot technique, roll thermal treatment energy consumption is low, the cycle is short, and roll there will not be oxidation and decarburization, and roll uses safety, in use, without roll breakage phenomenon, occurs.The outer field chemical component weight per-cent of described high-speed steel roll is: 0.8-0.9%C, 1.0-1.2%Si, 0.9-1.2%Mn ,≤0.03%P ,≤0.03%S, 0.9-1.0%Ni, 5-6%Cr, 1.4-1.5%Mo, 1.9-2.2%B, 1.4-1.6%V, 2-3%W, 0.4-0.5%Nb and rare earth.Chinese invention patent CN101240402 also discloses a kind of for making cast high-boron high-speed steel for composite ring roller and heat treating method thereof, it is the good high-abrasive material of a kind of thermal-shock resistance, also can apply other suitable operating modes, its chemical composition design is (% by weight): 0.20-1.10C, 1.0-2.5B, 3.0-5.0Cr, 0.5-0.9Si, 0.6-1.3Mn, 2.0-10.0V, 0.5-1.5Ni, 1.0-4.0Mo, 0.2-4.0W, 0.1-2.0Nb, S < 0.04, P < 0.04, all the other are Fe; Its heat treating method comprises annealing, quenches and 2-3 tempering, and annealing heating temperature is 800-860 ℃, the cold or air cooling of stove after stove is chilled to and is less than 500 ℃; Quenching temperature is 1020-1150 ℃, subsequently air-cooled or air cooling; Tempering 2-3 time, Heating temperature 500-550 ℃, the subsequently cold or air cooling of stove.Compare with traditional high-nickel-chromium molybdenum roll, significantly improve Wear Resistance, thermotolerance, thermal-shock resistance, reduce heat fatigue cracking phenomenon that roll in use occurs and consequently lose flesh, burst apart, embodying good security and the combination of wear resistance.
But boron-containing high speed steel roller exists hot hardness low not enough with the poor grade of high temperature abrasion resistance.Add aluminium can improve hot hardness and the high temperature abrasion resistance of rapid steel, Chinese invention patent CN1218842 discloses a kind of high carbon high-speed steel, especially a kind of superhard aluminium-containing high speed steel that simultaneously contains aluminium, rare earth element, titanium, boron.Its Chemical Composition is (% by weight): 0.90-1.35%C, 5.50-6.50%W, 4.50-5.50%Mo, 3.50-4.50%Cr, 1.65-2.20%V, 0.80-2.00%Al, 0.005-0.20%RE, 0.05-0.30%Ti, 0.001-0.05%B, Yu Weitie and impurity.Chinese invention patent CN101426944 also discloses the rapid steel for saw blade, and the alloying element composition of existence is calculated in mass percent by forming as follows: the carbon of 0.5-1.5; The chromium of 1.0-1.0; The equivalent tungsten of 3.0-10.0, this equivalence tungsten is provided by 2Mo+W relational expression; The niobium of 0.5-2.0, niobium can the ratio with corresponding 2% niobium of every 1% vanadium partly or entirely substitute with vanadium; The vanadium of 0.3-2.0, vanadium can the ratio with corresponding 2% niobium of every 1% vanadium partly or entirely substitute with niobium; The silicon of 0.3-3.5, silicon can the ratio with 1: 1 partly or entirely substitute with aluminium; Cobalt lower than 8; All the other are inevitable impurity in Fe and preparation process substantially.Chinese invention patent CN1227879 also discloses a kind of low-alloy high-speed steel, especially a kind of tungsten equivalent is controlled to 9≤(W+2Mo)≤11, and contains the low-alloy high-speed steel containing aluminium of aluminium, rare earth, titanium, nitrogen element simultaneously.Its Chemical Composition (% by weight) is: 0.95-1.20C, 1.00-9.00W, 1.00-5.00Mo, 3.50-4.50Cr, 1.65-2.05V, 0.80-1.50Al, 0.005-0.20RE, 0.05-0.40Ti, N≤0.10, Yu Weitie and impurity.It is poor that it overcomes or improved the comprehensive mechanical performance that existing all kinds of low-alloy high-speed steel exists, work-ing life is unstable, to the defect such as the adaptive surface of work metal material is narrow, are worth dispersity etc. in its red hardness, wear resistance, high-temp plastic, normal temperature toughness, work-ing life, work-ing life all more excellent than existing all kinds of low-alloy high-speed steels, approach with general universal high speed steel.Meanwhile, its production cost is lower than general universal high speed steel, suitable with existing all kinds of low-alloy high-speed steels, is that a kind of excellent performance, cost are low, the low-alloy high-speed steel that practicality is good.But above-mentioned materials is used as roll and still exists wear-resisting hard phase quantity few, wear no resistance, castability is poor and the poor grade of thermal fatigue property is not enough, causes roll working life to shorten.
Summary of the invention
The object of the invention is on boron-containing high speed steel roller basis, increase aluminium content, thereby improve the hot hardness of boron-containing high speed steel roller material, and improve the high temperature abrasion resistance of boron-containing high speed steel roller.Object of the present invention can realize by following measures.
The massfraction % of the chemical composition of roll material of the present invention is as follows: 0.35-0.55C, 3.2-3.4B, 5.5-6.0Cr, <0.85Si, <0.35Mn, 0.5-0.7V, 0.7-0.9Ni, 1.0-3.0W, 1.0-2.0Mo, and 3.8≤(W+2Mo)≤5.2,3.7-3.9Al, 0.03-0.06Ce, 0.03-0.06La, and 0.06< (La+Ce)≤0.10,0.12-0.15N, 0.05-0.08Ca, 0.04-0.10Mg, <0.03S, <0.04P, all the other are Fe.
Roll material of the present invention adopts electrosmelting, its smelting process, comprise the following steps: first by steel scrap, ferrochrome, ferrotungsten, molybdenum-iron and the fusing of nickel plate Hybrid Heating, molten steel molten clear after, skim and aluminum deoxidation, then add vanadium iron, ferro-boron and nitrided ferro-chromium, then liquid steel temperature is risen to 1580～1595 ℃, then add aluminium alloying, after stokehold adjusting component is qualified, come out of the stove, 1600～1620 ℃ of molten steel tapping temperatures.In advance the mixed rare earth of lanthanum and cerium of particle size 6～12mm and particle size 15～20mm magnalium calcium alloy are placed in to casting ladle bottom, in employing bag, pour method molten steel is carried out to composite inoculating processing, liquid steel temperature pours into roll in the time of 1430～1470 ℃, roll is after roughing, be heated to 1130～1150 ℃, oil cooling after insulation 4～6h, then 520～550 ℃ of tempering once, tempering insulation time is 12～15h, is finally refined to specified dimension and precision.
The performance of roll material is definite by its composition and thermal treatment process, and roll material design of the present invention be the reasons are as follows:
Carbon: carbon solid solution, in matrix, can improve matrix hardenability, but carbon content is too high, reduces roll thermal fatigue property, therefore by carbon content control at 0.35-0.55%.
Boron: boron can form the iron boron compound of high rigidity with iron, be conducive to improve roll wear resistance, but add-on is too much, obviously increases the fragility of roll, is therefore controlled at 3.2-3.4% by boron content.
Silicon and manganese: silicon reduces the thermal fatigue resistance of roll, and its content is controlled at below 0.85%.It is thick that manganese easily impels roll to organize, and the obdurability of infringement roll, is controlled at its content below 0.35%.
Chromium: chromium can obviously improve hardening capacity and the anti-temper softening ability of roll, and when it closes, add-on is 5.5-6.0%.
Tungsten and molybdenum: tungsten and molybdenum add in roll be mainly in order to improve the high temperature abrasion resistance of roll, but tungsten and molybdenum are expensive elements, its content can not be too high, molybdenum content is controlled to 1.0-2.0%, W content is controlled to 1.0-3.0%, and 3.8%≤(W+2Mo)≤5.2%.
Nickel: nickel is non-carbide and boride forming element, mainly be dissolved in matrix, improve matrix hardening capacity, prevent from occurring in quenching structure the pearlitic structure of soft, add-on is too much, in roll tissue, there is too much soft retained austenite, damage on the contrary roll wear resistance, therefore nickel content is controlled to 0.7-0.9%.
Vanadium: adding appropriate vanadium is mainly in order to obtain the MC type carbide of high rigidity, thus roll wear resistance improved, and vanadium also has the effect of crystal grain thinning, but vanadium is expensive, therefore content of vanadium is controlled to 0.5-0.7%.
Aluminium: aluminium is non-carbide and boride forming element, mainly be dissolved in matrix, improve matrix hot hardness and high temperature abrasion resistance, aluminium also has adding of good oxidation-resistance property, particularly aluminium, promotes the structural transformation of as cast condition roller substrate to become perlite and ferrite, reduce cast iron roll in as-cast hardness, be conducive to improve the processing characteristics of as cast condition roll, as cast condition roll, without anneal, can be realized quick machining.But aluminium reduces roll through hardening performance, therefore aluminium content is controlled to 3.7-3.9%.
Lanthanum and cerium: in molten steel, to add appropriate lanthanum and cerium be mainly deoxidation, desulfurization and thinning solidification structure and improve carbide and form of boride and distribution, thereby realize the object that improves roller comprehensive performance, but, lanthanum and cerium add-on are too much, inclusion content in melting steel increases, and damages on the contrary the performance of roll material, therefore lanthanum content is controlled to 0.03-0.06%, cerium content is controlled at 0.03-0.06%, and 0.06%< (La+Ce)≤0.10%.
Nitrogen: add proper N in molten steel, be mainly to utilize the element chemical combination such as boron in nitrogen and molten steel, vanadium, form dystectic nitride, play crystallization nuclei effect, thereby thinning solidification structure and improve carbide and form of boride and distribution, realizes the object that improves roller comprehensive performance.Nitrogen add-on is too much, and it is thick that nitride becomes, and damages on the contrary the performance of roll material, therefore by Control of Nitrogen Content at 0.12-0.15%.
Calcium and magnesium: calcium and magnesium have good deoxidation, sweetening power, calcium is also improved the advantageous effect of inclusion morphology and distribution, magnesium has thinning solidification structure, improve the effect of carbide and form of boride and distribution, to promoting roller performance to improve, have good effect, the magnesium add-on while closing is 0.04-0.10%, and the calcium add-on while closing is 0.05-0.08%.
Sulphur and phosphorus: sulphur and phosphorus are the harmful elements in roll material, to its content, should strictly control, roll material sulphur content of the present invention is controlled at below 0.03%, and phosphorus content is controlled at below 0.04%.
Roll material of the present invention adds because of aluminium element, promotes the structural transformation of as cast condition roller substrate to become perlite and ferrite, reduces cast iron roll in as-cast hardness, is conducive to improve the processing characteristics of as cast condition roll, and as cast condition roll, without anneal, can be realized quick machining.Roll after roughing is heated to 1130～1150 ℃ with stove, oil cooling after insulation 4～6h, guarantee that quenching structure is the martensite of high rigidity, adding of aluminium element, cause retained austenite in quenching structure obviously to reduce, 520～550 ℃ of tempering once, tempering insulation time 12～15h, just can meet service requirements to roll of the present invention.
Roll material room temperature hardness of the present invention and hot hardness are high, and high temperature abrasion resistance is good, are that a kind of excellent performance, cost are low, and the high speed steel roll material that practicality is good is produced for hot-rolled steel, has good result of use.
Compared with prior art, principal feature is in the present invention:
(1) roll material hardness of cast form of the present invention is low, without anneal, can directly process, and working (machining) efficiency is high;
(2) in roll material quenching structure of the present invention, retained austenite is few, and through 520～550 ℃ of tempering once, tempering insulation time 12～15h, just can meet service requirements.
(3) roll material hot hardness of the present invention is high, at the hot hardness of 550 ℃, reaches 630～670HV;
(4) roll material of the present invention has excellent high temperature abrasion resistance, for hot rolling wire rolling mill, the wear-resisting of roll material of the present invention improves 30～45% than common high boron high-speed steel roll, suitable with the high niobium high-speed steel roll of high cobalt, but not containing expensive alloy element such as cobalt, niobiums, its production cost reduces more than 30%.
Embodiment
Below in conjunction with embodiment, the present invention is further described:
Embodiment 1:
Adopt 500 kilograms of medium-frequency induction furnace meltings containing aluminium high boron high-speed steel roll material, concrete technology step is:
(1) first by steel scrap, ferrochrome, ferrotungsten, molybdenum-iron and the fusing of nickel plate Hybrid Heating, molten steel molten clear after, skim and aluminum deoxidation, then add vanadium iron, ferro-boron and nitrided ferro-chromium, then liquid steel temperature is risen to 1583 ℃, then add aluminium alloying, after stokehold adjusting component is qualified, come out of the stove, 1602 ℃ of molten steel tapping temperatures.
(2) in advance the magnalium calcium alloy of the mixed rare earth of lanthanum and cerium of particle size 6～12mm and particle size 15～20mm is placed in to casting ladle bottom, in employing bag, pours method molten steel is carried out to composite inoculating processing.
(3) liquid steel temperature pours into roll in the time of 1433 ℃, and roll, after roughing, is heated to 1130 ℃, oil cooling after insulation 6h, and then 550 ℃ of tempering once, tempering insulation time is 12h, is finally refined to specified dimension and precision.The composition of roll material is in Table 1, and the room temperature hardness of roll material is 67.2HRC, at the hot hardness of 550 ℃, reaches 635.7HV.
Embodiment 2:
Adopt 500 kilograms of medium-frequency induction furnace meltings containing aluminium high boron high-speed steel roll material, concrete technology step is:
(1) first by steel scrap, ferrochrome, ferrotungsten, molybdenum-iron and the fusing of nickel plate Hybrid Heating, molten steel molten clear after, skim and aluminum deoxidation, then add vanadium iron, ferro-boron and nitrided ferro-chromium, then liquid steel temperature is risen to 1594 ℃, then add aluminium alloying, after stokehold adjusting component is qualified, come out of the stove, 1618 ℃ of molten steel tapping temperatures.
(2) in advance the magnalium calcium alloy of the mixed rare earth of lanthanum and cerium of particle size 6～12mm and particle size 15～20mm is placed in to casting ladle bottom, in employing bag, pours method molten steel is carried out to composite inoculating processing.
(3) liquid steel temperature pours into roll in the time of 1466 ℃, and roll, after roughing, is heated to 1150 ℃, oil cooling after insulation 4h, and then 520 ℃ of tempering once, tempering insulation time is 15h, is finally refined to specified dimension and precision.The composition of roll material is in Table 1, and the room temperature hardness of roll material is 68.5HRC, at the hot hardness of 550 ℃, reaches 662.4HV.
Embodiment 3:
Adopt 500 kilograms of medium-frequency induction furnace meltings containing aluminium high boron high-speed steel roll material, concrete technology step is:
(1) first by steel scrap, ferrochrome, ferrotungsten, molybdenum-iron and the fusing of nickel plate Hybrid Heating, molten steel molten clear after, skim and aluminum deoxidation, then add vanadium iron, ferro-boron and nitrided ferro-chromium, then liquid steel temperature is risen to 1587 ℃, then add aluminium alloying, after stokehold adjusting component is qualified, come out of the stove, 1613 ℃ of molten steel tapping temperatures.
(2) in advance the magnalium calcium alloy of the mixed rare earth of lanthanum and cerium of particle size 6～12mm and particle size 15～20mm is placed in to casting ladle bottom, in employing bag, pours method molten steel is carried out to composite inoculating processing.
(3) liquid steel temperature pours into roll in the time of 1455 ℃, and roll, after roughing, is heated to 1140 ℃, oil cooling after insulation 5h, and then 540 ℃ of tempering once, tempering insulation time is 13h, is finally refined to specified dimension and precision.The composition of roll material is in Table 1, and the room temperature hardness of roll material is 67.9HRC, at the hot hardness of 550 ℃, reaches 646.8HV.
The composition of table 1 roll material (massfraction, %)
Roll material of the present invention is for hot rolling wire rolling mill, roll material room temperature of the present invention and hot hardness are high, high temperature abrasion resistance is good, the wear-resisting of roll material of the present invention improves 30～45% than common high boron high-speed steel roll, suitable with the high niobium high-speed steel roll of high cobalt, but not containing expensive alloy element such as cobalt, niobiums, its production cost reduces more than 30%.Apply roll rolled wire of the present invention, wire surface is bright and clean, and dimensional precision is high, and roll of the present invention uses safety, reliable, and long service life, applies and have good economic and social benefit.
Claims (2)
1. one kind contains aluminium high boron high-speed steel roll material, it is characterized in that, the massfraction % of the chemical composition of this material is as follows: 0.35-0.55C, 3.2-3.4B, 5.5-6.0Cr, <0.85Si, <0.35Mn, 0.5-0.7V, 0.7-0.9Ni, 1.0-3.0W, 1.0-2.0Mo, and 3.8≤(W+2Mo)≤5.2, 3.7-3.9Al, 0.03-0.06Ce, 0.03-0.06La, and 0.06< (La+Ce)≤0.10, 0.12-0.15N, 0.05-0.08Ca, 0.04-0.10Mg, <0.03S, <0.04P, all the other are Fe.
2. the smelting process containing aluminium high boron high-speed steel roll material claimed in claim 1, it is characterized in that, adopt electrosmelting, comprise the following steps: first by steel scrap, ferrochrome, ferrotungsten, molybdenum-iron and the fusing of nickel plate Hybrid Heating, molten steel molten clear after, skim and aluminum deoxidation, then add vanadium iron, ferro-boron and nitrided ferro-chromium, liquid steel temperature is risen to 1580～1595 ℃ again, then add aluminium alloying, after stokehold adjusting component is qualified, come out of the stove, 1600～1620 ℃ of molten steel tapping temperatures; In advance the magnalium calcium alloy of the mixed rare earth of lanthanum and cerium of particle size 6～12mm and particle size 15～20mm is placed in to casting ladle bottom, in employing bag, pour method molten steel is carried out to composite inoculating processing, liquid steel temperature pours into roll in the time of 1430～1470 ℃, roll is after roughing, be heated to 1130～1150 ℃, oil cooling after insulation 4～6h, then 520～550 ℃ of tempering once, tempering insulation time is 12～15h, is finally refined to specified dimension and precision.
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| CN103498108A (en) * | 2013-10-22 | 2014-01-08 | 江苏盛伟模具材料有限公司 | High-boron high-chromium low-carbon wear-resisting alloy steel with good red hardness and manufacturing method thereof |
| CN103572166A (en) * | 2013-10-22 | 2014-02-12 | 江苏盛伟模具材料有限公司 | Boracic high-speed steel with good red hardness and preparation method thereof |
| CN103540855A (en) * | 2013-10-25 | 2014-01-29 | 丁家伟 | High-toughness high-boron medium-chrome low-carbon wear-resisting alloy steel and preparation method thereof |
| CN104480372A (en) * | 2014-12-29 | 2015-04-01 | 芜湖金龙模具锻造有限责任公司 | Preparation method of boron-antimony alloy roller material |
| CN105624551A (en) * | 2016-02-26 | 2016-06-01 | 铜陵安东铸钢有限责任公司 | High-boron wear-resisting cast steel and preparation method thereof |
| CN106544596B (en) * | 2017-01-19 | 2018-07-13 | 西安工程大学 | A kind of aluminium alloying high-boron high-speed steel composite roller and preparation method thereof |
| CN108588565B (en) * | 2018-06-14 | 2021-01-05 | 北京工业大学 | Aluminum-containing high-boron high-speed steel roller material and manufacturing method thereof |
| CN114875302B (en) * | 2022-03-25 | 2022-11-29 | 广东省科学院新材料研究所 | Low-alloy steel and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999803A (en) * | 2006-12-22 | 2007-07-18 | 西安交通大学 | High boron wear-resisting casting steel and preparation process thereof |
| CN102744532A (en) * | 2011-04-19 | 2012-10-24 | 王新虎 | Iron-based abrasion resisting and reducing surfacing flux-cored wire |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999803A (en) * | 2006-12-22 | 2007-07-18 | 西安交通大学 | High boron wear-resisting casting steel and preparation process thereof |
| CN102744532A (en) * | 2011-04-19 | 2012-10-24 | 王新虎 | Iron-based abrasion resisting and reducing surfacing flux-cored wire |
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