CN106244943B - A kind of guide wheel preparation method based on Laigang alloy - Google Patents

A kind of guide wheel preparation method based on Laigang alloy Download PDF

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CN106244943B
CN106244943B CN201610695731.1A CN201610695731A CN106244943B CN 106244943 B CN106244943 B CN 106244943B CN 201610695731 A CN201610695731 A CN 201610695731A CN 106244943 B CN106244943 B CN 106244943B
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temperature
guide wheel
alloy
laigang
ferrotianium
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CN106244943A (en
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赵仕章
吴鹏
王孟祥
王磊
吴翠凤
吴涛
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Hefei Orient Energy Efficiency Technology Co Ltd
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Hefei Orient Energy Efficiency Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/007—Ledeburite

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  • Physics & Mathematics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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Abstract

The invention discloses a kind of guide wheel preparation methods based on Laigang alloy.It is configured including raw material, the configuration of Laigang alloy base material and composite material is respectively 80% 89% and 11% 20%, melting, casting and roughing, heat treatment and Nitrizing Treatment.For the present invention using Laigang alloy as matrix, the ledeburite that is formed is eutectic using cementite as matrix, and eutectic carbide is more and more in ledeburite, has high alloy hardness and wearability；Using Laigang alloy as matrix, assistant metal aluminium, ferro-boron and ferrotianium form the structure of complex with ledeburite, improve the structural rigidity of guide wheel.

Description

A kind of guide wheel preparation method based on Laigang alloy
Technical field
The invention belongs to mill guide wheel technical fields, more particularly to a kind of guide wheel preparation method based on Laigang alloy.
Background technology
Domestic and international heat resisting steel has formed ripe standards system, and heat resisting steel includes mainly that oxidation resistant steel and refractory steel two are big Class, wherein refractory steel require to be divided into according to structural state and performance：Pearlite type refractory steel, martensite type refractory steel are He Austria Family name's build refractory steel；Oxidation-resistant heat-resistant steel is divided into two class steel of ferrite and austenite.And domestic abrasion-resistant stee is at present still without system Technical standard, but make wear part selected by steel grade it is wider, such as the more extensive potassium steel v tool steel of purposes, alloy Cast iron, middle low-alloy wear-resistant steel and special abrasion-resistant stee etc..The development of abrasion-resistant stee is generally according to operating condition, wear type and material The difference for expecting failure mechanism, to select and design steel grade.
Guide wheel is the important spare part that consumption is larger in hot rolled rod production line, is the key that portion in steel rolling guide assembly Part, the shadow land measure equal to fifteen mu in most parts of the Northeast the technical-economic indexes such as operating rate of rolling mill.The many guide and guard part heat resistances used are insufficient, and it is existing steel bonding etc. occur As also some process conditions wearabilities, thermal fatigue property are bad, affect service life and mill bar quality.
The physical essence of hardness abrasion is a kind of fracture process of special shape, is happened at surface layer and the Ya Biao of wear-out part Layer.It when considering hardness number, cannot simply think that hardness more high-wearing feature is better, to fully consider its under various regimes hard Degree.Such as:The hardness changed due to Surface hardened layer or softening in the course of work；Make surface due to being contacted with high temperature rolled piece Temperature increases, and to consider high temperature hardness.
Rolling guide (guide wheel) working condition：High temperature is born, strength is worn, and abrasive material is iron scale；It is sprayed in the course of work Drench the Thermal shock testing that cooling water generates.Therefore, the material for making guide wheel first has to resist the strength abrasion under high temperature, also wants Bear the heat fatigue of all kinds of impacts and the cold formation of sharp heat shock when rolling.
Invention content
The purpose of the present invention is to provide a kind of guide wheel preparation methods based on Laigang alloy, by using Laigang alloy as base Body, the ledeburite formed are the eutectics using cementite as matrix, and assistant metal aluminium, ferro-boron and ferrotianium and ledeburite form multiple Fit structure, improves the structural rigidity of guide wheel.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions：
The present invention is a kind of guide wheel preparation method based on Laigang alloy, is included the following steps：
Step 1, raw material configuration：
The Laigangs A alloy base material：Use mass fraction for 40~45% ferromanganese, 10~15% ferrochrome, 2~5% Ferrosilicon, 1~2% molybdenum-iron, 10~15% ferronickel, surplus Fe；
Wherein, the chemical composition of Laigang alloy base material is C 1.65-1.85%, Mn 0.7-1.0%, Si 0.6- 0.9%, Cr 15.0-17.0%, Mo 0.8-1.0%, Ni 4.6-5.5%；
B composite materials：Use mass fraction for 1.0~1.5% metallic aluminium, 1.0~1.2% ferro-boron, 1.3~ 1.5% ferrotianium dispensing, surplus Fe；
Wherein, the chemical composition of composite material is Al 1.0~1.5%, B 1.0~1.5%, Ti 1.0~1.5%；
The B of the A and 11%-20% for being configured to 80%-89% of the Laigangs C alloy base material and composite material；
Step 2, melting：By ferromanganese, ferrochrome, ferrosilicon, molybdenum-iron, the ferronickel in step 1, mixed in medium-frequency induction furnace Heating fusing；When liquid steel temperature reaches 1530~1550 DEG C, stops heating, after being stored at room temperature 30-60min, remaining gold is added Belong to aluminium, ferro-boron and ferrotianium, heating when liquid steel temperature being made to reach 1660~1680 DEG C, stops heating, after being stored at room temperature 1-2h, goes out Stove enters casting ladle；
Step 3, casting and roughing：When liquid steel temperature is down to 1505~1520 DEG C, molten steel is poured into casting mold, is obtained Guide wheel blank, guide wheel blank enter stove heat to 880~920 DEG C after sand removal, dead head being gone to handle, after heat preservation 4~6 hours, stove It is air-cooled to room temperature after being cooled to temperature less than 500 DEG C, then carries out roughing；
Step 4, heat treatment：Guide wheel after roughing is continued into stove heat to 1020~1050 DEG C, keeps the temperature 2~4 hours Afterwards, machine finishing is carried out；Cooling 40~60 minutes is quenched in the oil quenching bath that temperature is 100~150 DEG C, then 200 ~220 DEG C of tempering keep the temperature 8~10 hours, come out of the stove and are air-cooled to room temperature；
Step 5, Nitrizing Treatment：Step 4 treated guide pulley surface is subjected to nitriding, is carried out continuously 2-3 times, oozes every time Nitrogen temperature reduces by 5 DEG C.
Further, casting technique uses vertical pouring in the step 3, presses 2 riser, cast gate to open on casting both sides In riser root, it is 1515 DEG C that cast, which uses top pouring type, pouring temperature,.
Further, the chemical composition mass fraction of the ferrotianium is：Ti：38~42%, Al：3~6%, Si：2.0~ 4.5%, Mn：0.5~1.5%, C：≤ 0.1%, P：≤ 0.1%, S：≤ 0.06%, surplus Fe.
The invention has the advantages that：
1, for guide wheel of the present invention using Laigang alloy as matrix, the ledeburite formed is the eutectic using cementite as matrix, It is the product of eutectic reaction, with the increase of phosphorus content, eutectic carbide is more and more in ledeburite, this kind of alloy rigidity and resistance to Mill property is all very high；Matrix is AustriaShi bodies, and a large amount of carbide is dispersed on austenitic matrix.This tissue morphology ensure that Wear-resisting property requirement under workpiece high temperature.
2, guide wheel wearability of the invention and resistance to viscosity are unified, superior performance；After guide wheel embraces steel amount increase, mitigate inlet clip Plate is helped, and is greatly reduced and is scratched size waste product.
3, the guide wheel service life of the invention is highly desirable, and wear extent is smaller, and rolled steel surface quality is preferable, reduces Between the hot stopping time, mitigate labor intensity.If using the small roller bearing of high-performance, bearing assembly method is improved, increases cooling water inflow And cooling efficiency, effect will be more preferable.
4, guide wheel of the invention is using Laigang alloy as matrix, and assistant metal aluminium, ferro-boron and ferrotianium and ledeburite form compound The structure of body improves the structural rigidity of guide wheel.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described, Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention Embodiment, all other embodiment that those of ordinary skill in the art are obtained without creative efforts, all Belong to the scope of protection of the invention.
Embodiment one
A kind of guide wheel preparation method based on Laigang alloy, includes the following steps：
Step 1, raw material configuration：
The Laigangs A alloy base material：Use mass fraction for 40% ferromanganese, 10% ferrochrome, 2% ferrosilicon, 1% Molybdenum-iron, 10% ferronickel, surplus Fe；
Wherein, the chemical composition of Laigang alloy base material is C 1.65%, Mn 0.7%, Si 0.6%, Cr 15.0%, Mo 0.8%, Ni 4.6%；
B composite materials：Use mass fraction for 1.0% metallic aluminium, 1.0% ferro-boron, 1.3% ferrotianium dispensing, it is remaining Amount is Fe；
Wherein, the chemical composition of composite material is Al 1.0%, B 1.0%, Ti 1.0%；
The B of the A and 20% for being configured to 80% of the Laigangs C alloy base material and composite material；
Step 2, melting：By ferromanganese, ferrochrome, ferrosilicon, molybdenum-iron, the ferronickel in step 1, mixed in medium-frequency induction furnace Heating fusing；When liquid steel temperature reaches 1530~1550 DEG C, stops heating, after being stored at room temperature 30-60min, remaining gold is added Belong to aluminium, ferro-boron and ferrotianium, heating when liquid steel temperature being made to reach 1660~1680 DEG C, stops heating, after being stored at room temperature 1-2h, goes out Stove enters casting ladle；
Step 3, casting and roughing：When liquid steel temperature is down to 1505~1520 DEG C, molten steel is poured into casting mold, is obtained Guide wheel blank, guide wheel blank enter stove heat to 880~920 DEG C after sand removal, dead head being gone to handle, after heat preservation 4~6 hours, stove It is air-cooled to room temperature after being cooled to temperature less than 500 DEG C, then carries out roughing；
Step 4, heat treatment：Guide wheel after roughing is continued into stove heat to 1020~1050 DEG C, keeps the temperature 2~4 hours Afterwards, machine finishing is carried out；Cooling 40~60 minutes is quenched in the oil quenching bath that temperature is 100~150 DEG C, then 200 ~220 DEG C of tempering keep the temperature 8~10 hours, come out of the stove and are air-cooled to room temperature；
Step 5, Nitrizing Treatment：Step 4 treated guide pulley surface is subjected to nitriding, is carried out continuously 2-3 times, oozes every time Nitrogen temperature reduces by 5 DEG C.
Wherein, casting technique uses vertical pouring in step 3, presses 2 riser, cast gate to be opened in riser pad on casting both sides Portion, it is 1515 DEG C that cast, which uses top pouring type, pouring temperature,.
Wherein, the chemical composition mass fraction of ferrotianium is：Ti：38~42%, Al：3~6%, Si：2.0~4.5%, Mn： 0.5~1.5%, C：≤ 0.1%, P：≤ 0.1%, S：≤ 0.06%, surplus Fe.
According to the B of Laigang alloy base material and the A and 11%-20% for being configured to 80%-89% of composite material, test Analysis show that the guide wheel quality of acquisition carries out the test of 100h, experimental result is led in the range into steel speed 180-200m/s Wheel surface damages, and steel bonding phenomenon occurs.
Embodiment two
A kind of guide wheel preparation method based on Laigang alloy, includes the following steps：
Step 1, raw material configuration：
The Laigangs A alloy base material：Use mass fraction for 43% ferromanganese, 13% ferrochrome, 3% ferrosilicon, 1.5% Molybdenum-iron, 13% ferronickel, surplus Fe；
Wherein, the chemical composition of Laigang alloy base material be C 1.75%, Mn 0.8%, Si 0.7%, Cr 16%, Mo 0.9%, Ni 5.1%；
B composite materials：Use mass fraction for 1.3% metallic aluminium, 1.1% ferro-boron, 1.4% ferrotianium dispensing, it is remaining Amount is Fe；
Wherein, the chemical composition of composite material is Al 1.3%, B 1.3%, Ti 1.3%；
The B of the A and 11%-20% for being configured to 80%-89% of the Laigangs C alloy base material and composite material；
Step 2, melting：By ferromanganese, ferrochrome, ferrosilicon, molybdenum-iron, the ferronickel in step 1, mixed in medium-frequency induction furnace Heating fusing；When liquid steel temperature reaches 1530~1550 DEG C, stops heating, after being stored at room temperature 30-60min, remaining gold is added Belong to aluminium, ferro-boron and ferrotianium, heating when liquid steel temperature being made to reach 1660~1680 DEG C, stops heating, after being stored at room temperature 1-2h, goes out Stove enters casting ladle；
Step 3, casting and roughing：When liquid steel temperature is down to 1505~1520 DEG C, molten steel is poured into casting mold, is obtained Guide wheel blank, guide wheel blank enter stove heat to 880~920 DEG C after sand removal, dead head being gone to handle, after heat preservation 4~6 hours, stove It is air-cooled to room temperature after being cooled to temperature less than 500 DEG C, then carries out roughing；
Step 4, heat treatment：Guide wheel after roughing is continued into stove heat to 1020~1050 DEG C, keeps the temperature 2~4 hours Afterwards, machine finishing is carried out；Cooling 40~60 minutes is quenched in the oil quenching bath that temperature is 100~150 DEG C, then 200 ~220 DEG C of tempering keep the temperature 8~10 hours, come out of the stove and are air-cooled to room temperature；
Step 5, Nitrizing Treatment：Step 4 treated guide pulley surface is subjected to nitriding, is carried out continuously 2-3 times, oozes every time Nitrogen temperature reduces by 5 DEG C.
Wherein, casting technique uses vertical pouring in step 3, presses 2 riser, cast gate to be opened in riser pad on casting both sides Portion, it is 1515 DEG C that cast, which uses top pouring type, pouring temperature,.
Wherein, the chemical composition mass fraction of ferrotianium is：Ti：38%, Al：3%, Si：2.0%, Mn：0.5%, C：≤ 0.1%, P：≤ 0.1%, S：≤ 0.06%, surplus Fe.
According to the composite material of the Laigang alloy base material of low content composition and content composition be configured to 80% A and 20% B, test analysis show that the guide wheel quality of acquisition carries out the test of 100h in the range into steel speed 180-200m/s, There is slight damage, no steel bonding phenomenon in experimental result, guide pulley surface.
Embodiment three
A kind of guide wheel preparation method based on Laigang alloy, includes the following steps：
Step 1, raw material configuration：
The Laigangs A alloy base material：Use mass fraction for 45% ferromanganese, 15% ferrochrome, 5% ferrosilicon, 2% Molybdenum-iron, 15% ferronickel, surplus Fe；
Wherein, the chemical composition of Laigang alloy base material is C 1.85%, Mn 1.0%, Si 0.9%, Cr 17.0%, Mo 1.0%, Ni 5.5%；
B composite materials：Use mass fraction for 1.5% metallic aluminium, 1.2% ferro-boron, 1.5% ferrotianium dispensing, it is remaining Amount is Fe；
Wherein, the chemical composition of composite material is Al 1.5%, B 1.5%, Ti 1.5%；
The B of the A and 11%-20% for being configured to 80%-89% of the Laigangs C alloy base material and composite material；
Step 2, melting：By ferromanganese, ferrochrome, ferrosilicon, molybdenum-iron, the ferronickel in step 1, mixed in medium-frequency induction furnace Heating fusing；When liquid steel temperature reaches 1530~1550 DEG C, stops heating, after being stored at room temperature 30-60min, remaining gold is added Belong to aluminium, ferro-boron and ferrotianium, heating when liquid steel temperature being made to reach 1660~1680 DEG C, stops heating, after being stored at room temperature 1-2h, goes out Stove enters casting ladle；
Step 3, casting and roughing：When liquid steel temperature is down to 1505~1520 DEG C, molten steel is poured into casting mold, is obtained Guide wheel blank, guide wheel blank enter stove heat to 880~920 DEG C after sand removal, dead head being gone to handle, after heat preservation 4~6 hours, stove It is air-cooled to room temperature after being cooled to temperature less than 500 DEG C, then carries out roughing；
Step 4, heat treatment：Guide wheel after roughing is continued into stove heat to 1020~1050 DEG C, keeps the temperature 2~4 hours Afterwards, machine finishing is carried out；Cooling 40~60 minutes is quenched in the oil quenching bath that temperature is 100~150 DEG C, then 200 ~220 DEG C of tempering keep the temperature 8~10 hours, come out of the stove and are air-cooled to room temperature；
Step 5, Nitrizing Treatment：Step 4 treated guide pulley surface is subjected to nitriding, is carried out continuously 2-3 times, oozes every time Nitrogen temperature reduces by 5 DEG C.
Wherein, casting technique uses vertical pouring in step 3, presses 2 riser, cast gate to be opened in riser pad on casting both sides Portion, it is 1515 DEG C that cast, which uses top pouring type, pouring temperature,.
Wherein, the chemical composition mass fraction of ferrotianium is：Ti：42%, Al：6%, Si：4.5%, Mn：1.5%, C：≤ 0.1%, P：≤ 0.1%, S：≤ 0.06%, surplus Fe.
According to the B of Laigang alloy base material and the A and 11% for being configured to 89% of composite material, test analysis obtains, The guide wheel quality of acquisition carries out the test of 100h in the range into steel speed 180-200m/s, experimental result, and guide pulley surface is lossless Wound, no steel bonding phenomenon.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the present invention In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example. Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification, It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to preferably explain the present invention Principle and practical application, to enable skilled artisan to be best understood by and utilize the present invention.The present invention is only It is limited by claims and its full scope and equivalent.

Claims (1)

1. a kind of guide wheel preparation method based on Laigang alloy, which is characterized in that include the following steps：
Step 1, raw material configuration：
The Laigangs A alloy base material：Use mass fraction for 40~45% ferromanganese, 10~15% ferrochrome, 2~5% silicon Iron, 1~2% molybdenum-iron, 10~15% ferronickel, surplus Fe；
Wherein, the chemical composition of Laigang alloy base material be C 1.65-1.85%, Mn 0.7-1.0%, Si0.6-0.9%, Cr 15.0-17.0%, Mo 0.8-1.0%, Ni 4.6-5.5%；
B composite materials：Use mass fraction for 1.0~1.5% metallic aluminium, 1.0~1.2% ferro-boron, 1.3~1.5% Ferrotianium dispensing, surplus Fe；
Wherein, the chemical composition of composite material is Al 1.0~1.5%, B 1.0~1.5%, Ti 1.0~1.5%；
The B of the A and 11%-20% for being configured to 80%-89% of the Laigangs C alloy base material and composite material；
Step 2, melting：By ferromanganese, ferrochrome, ferrosilicon, molybdenum-iron, the ferronickel in step 1, the Hybrid Heating in medium-frequency induction furnace Fusing；When liquid steel temperature reaches 1530~1550 DEG C, stop heating, after being stored at room temperature 30-60min, be added remaining metallic aluminium, Ferro-boron and ferrotianium, heating when liquid steel temperature being made to reach 1660~1680 DEG C, stop heating, after being stored at room temperature 1-2h, come out of the stove into pouring Packet；
Step 3, casting and roughing：When liquid steel temperature is down to 1450~1470 DEG C, molten steel is poured into casting mold, obtains guide wheel Blank, guide wheel blank enter stove heat to 880~920 DEG C, after keeping the temperature 4~6 hours, are furnace-cooled to after sand removal, dead head being gone to handle Temperature is air-cooled to room temperature after being less than 500 DEG C, then carries out roughing；
Step 4, heat treatment：Guide wheel after roughing is continued into stove heat to 1020~1050 DEG C, after keeping the temperature 2~4 hours, Carry out machine finishing；Quenched in temperature is 100~150 DEG C of oil quenching bath it is 40~60 minutes cooling, then 200~ 220 DEG C of tempering keep the temperature 8~10 hours, come out of the stove and are air-cooled to room temperature；
Step 5, Nitrizing Treatment：Step 4 treated guide pulley surface is subjected to nitriding, is carried out continuously 2-3 times, each nitriding temperature Degree reduces by 5 DEG C；
Casting technique uses vertical pouring in the step 3；
The chemical composition mass fraction of the ferrotianium is：Ti：38~42%, Al：3~6%, Si：2.0~4.5%, Mn：0.5~ 1.5%, C：≤ 0.1%, P：≤ 0.1%, S：≤ 0.06%, surplus Fe.
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CN101487102B (en) * 2009-02-13 2010-11-03 深圳大学 Non-molybdenum non-nickel middle chrome wear resistant steel casting and heat treatment method thereof
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