CN106854727B - A kind of active scraper cutting knife preparation method - Google Patents
A kind of active scraper cutting knife preparation method Download PDFInfo
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- CN106854727B CN106854727B CN201611002465.6A CN201611002465A CN106854727B CN 106854727 B CN106854727 B CN 106854727B CN 201611002465 A CN201611002465 A CN 201611002465A CN 106854727 B CN106854727 B CN 106854727B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C21D5/00—Heat treatments of cast-iron
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
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- 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
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A kind of active scraper cutting knife preparation method, including prepare disappearance apperance and group type；By the requirement preparation raw material of final chemical composition, the raw material prepared is heated and melted；Lime-based composite desulfurization agent desulfurization process is added, is skimmed；In pouring ladle 1/3 iron liquid is poured into electric furnace, adds carborundum and molybdenum, then remaining iron liquid in pouring ladle is poured into electric furnace, is heated to 1450 DEG C；Copper and mickel is added at a temperature of 1450 DEG C, then heats to 1480 DEG C, after composition detection is qualified, bonded hard ferrite magnet is risen to 1500~1520 DEG C；Using lid bag method nodularization；Handled with ferrosilicon late inoculation；Cast；Casting is cooled to 550~600 DEG C in die cavity, after vibrating shakeout cleans out, is heat-treated；Casting goes out after heat-treatment furnace in quenching tank of quenching, and after casting temperature is down to 350~380 DEG C, room temperature is air-cooled to after being incubated 2 hours under the conditions of 350~380 DEG C；Casting after will be quenched is heated up to 250~320 DEG C, and insulation is air-cooled to room temperature after 2 hours；Cold rolling working hardening.
Description
Technical field
The present invention relates to Engineering Machinery Components manufacturing technology field, more particularly, to a kind of preparation side of scraper cutting knife
Method.
Background technology
Active scraper grounding pressure is small, can realize pivot stud.It is poor in awful weather, narrow space, geological state
Miriness and marshland, round-the-clock, continuous, high-efficient homework can be realized, possess good reliability and adaptability.Machine utilizes
Backing-off cutting soil, and hack loading scraper bowl is transported and unloaded native leveling, an active scraper is suitable within the unit interval
In a digging machine, a bull-dozer and the common workload of two load wagons.
The cutting knife of active scraper is key components and parts, and depth of cut is larger, and the digging force of carrying is larger, it is desirable to scraper bowl
It is anti-wear with high intensity, and have preferable welding performance.The cutting knife of active scraper uses HARDOX400 fine grains more
Steel are granulated to prepare, need to be from external import, expensive, delivery cycle is grown, and is made troubles to production.
The content of the invention
The defects of in order to overcome prior art, the present invention provide a kind of active scraper cutting knife preparation method, use the party
The active scraper cutting knife of method production has the characteristics of intensity is high, wear-resisting, elongation percentage is high, and mechanical performance is excellent.
In order to solve the above-mentioned technical problem, the present invention provides a kind of active scraper cutting knife preparation method, including prepares
Active scraper cutting knife disappearance apperance and group type；Casting feedstock melting, desulfurization, pretreatment, Alloying Treatment, spheroidising,
Inoculation, cast, quenching, tempering, surface peening step；The casting feedstock presses final chemical composition：C3.5wt%~
3.8wt%, Si2.5wt%~2.8wt%, Mn0.17wt%~0.19wt%, P≤0.03wt%, S≤0.02wt%, Cu0.50wt%~
0.60wt%, Mo0.28wt%~0.30wt%, Ni0.50wt%~0.55wt%, RE0.010wt%~0.015wt%, Mg0.02wt%
~0.03wt%, surplus are iron and impurity, disturb impurity ∑ T ＜ 0.1wt% requirement to be prepared in impurity；By the casting after preparation
The heating melting of part raw material；The desulfurization is compound de- for the lime base of iron liquid 0.8wt%~1.2wt% after the addition melting in pouring ladle
Sulphur agent, then iron liquid after melting is put into pouring ladle and carries out desulfurization process, is skimmed, after desulfurization in iron liquid S content≤
0.02wt%；The pre-treatment step includes pouring into pouring ladle 1/3 iron liquid in electric furnace, is added on the iron liquid surface of electric furnace
Total iron liquid amount 0.8wt%~1.2wt% carborundum and 0.28wt%~0.30wt% molybdenum in pouring ladle, then will be remaining in pouring ladle
Iron liquid pour into electric furnace, be heated to 1450 DEG C；The Alloying Treatment makes casting to add copper and mickel at a temperature of 1450 DEG C
Cu contents are 0.50wt%~0.60wt% in the final chemical composition of part raw material, and Ni contents are 0.50wt%~0.55wt%, Ran Housheng
Bonded hard ferrite magnet after composition detection is qualified, is risen to 1500~1520 DEG C by temperature to 1480 DEG C；The spheroidising is using lid Bao Faqiu
Change, nodulizer FeSiMg5RE1, nodulizer addition is 1.1wt%~1.3wt% of iron liquid gross weight, and the nodularization burst time is
20~25 seconds, the spheroidizing reacion time was 80~100 seconds；The inoculation is late inoculation processing, and inovulant used is silicon
Iron；Cast system temperature is 1400~1420 DEG C of iron liquid castings after inoculation step；The quenching Step bag
Include：Casting is cooled to 550~600 DEG C in die cavity, and after vibrating shakeout cleans out, casting is put into heat-treatment furnace, with
80 DEG C/h of programming rate is heated up to 550~600 DEG C, is incubated 1 hour；It is heated up to again with 120 DEG C/h of programming rate
900~920 DEG C, it is incubated 2 hours；Casting goes out after heat-treatment furnace in quenching tank of directly quenching, and casting temperature is down to 350~380 DEG C
Afterwards, move into holding furnace, room temperature is air-cooled to after being incubated 2 hours under the conditions of 350~380 DEG C；The tempering step includes：Will be through
Casting after quenching Step processing is heated up to 250~320 DEG C, and insulation is air-cooled to room temperature after 2 hours；The surface peening step is adopted
With cold rolling working hardening, rolling speed 45r/min, rolling power is 3500N.
As further improved technology scheme：Active scraper cutting knife preparation method provided by the invention, the pre- place
The carborundum granularity used in reason step is 1~5mm, and lumps are made as binding agent with cement.
As further improved technology scheme：Active scraper cutting knife preparation method provided by the invention, it is described to breed
Handle as late inoculation processing；First time inoculation is breeds with stove, and the ferrosilicon granularity of addition is 3~6mm, and addition is iron
%~0.6% of liquid quality 0.3；Second of inoculation breeds to be ladle-to-ladle, and ferrosilicon granularity≤1mm of addition, addition is iron liquid matter
The % of 0.1 %~0.2 of amount.
As further improved technology scheme：Active scraper cutting knife preparation method provided by the invention, the quenching
Step is hardening media using sodium silicate solution, and the solution density is 1.15~1.20g/cm3, and initial temperature is 30 DEG C~50
DEG C, hardening media is 1: 7~1: 8 with quenching workpiece mass ratio.
In the case where not conflicting, above improvement project or implement alone or in combination.
Technical scheme provided by the invention, using lost foam casting process, product external surfaces are smooth, and processing capacity is less；Casting
Part raw material is smelting, desulfurization, pretreatment, Alloying Treatment, spheroidising, cast after inoculation, product are quenched, tempering,
Surface peenings, the intensity of active scraper cutting knife, anti-wear performance, elongation percentage are improved, makes it have excellent mechanical performance,
Meet its applying working condition requirement.
Embodiment
Embodiment 1：
Active scraper cutting knife preparation process, including prepare active scraper cutting knife disappearance apperance and group type；By most
Whole chemical composition：C 3.5wt%, Si 2.5wt%, Mn 0.17wt%, P≤0.03wt%, S≤0.02wt%, Cu 0.60wt%, Mo
0.28wt%, Ni 0.55wt%, RE 0.010wt%, Mg 0.03wt%, surplus are iron and impurity, and impurity ∑ T ＜ are disturbed in impurity
Casting feedstock is prepared in 0.1wt% requirement, using furnace cupola, electric induction furnace double melting, the casting feedstock after preparation is heated molten
Melt；The lime-based composite desulfurization agent of iron liquid 1.2wt% after melting is added in pouring ladle, then is put into pouring ladle by iron liquid
Row desulfurization process, skims, after desulfurization in iron liquid S content≤0.02wt%；In pouring ladle about 1/3 iron liquid is poured into electric furnace,
Total iron liquid amount 0.8wt% carborundum and 0.28wt% molybdenum in pouring ladle are added on the iron liquid surface of electric furnace, then by pouring ladle
Iron liquid is poured into electric furnace after remaining melting, is heated to 1450 DEG C and is pre-processed, and the carborundum granularity of addition is 5mm, is used in combination
Lumps are made as binding agent in cement；The Alloying Treatment at a temperature of 1450 DEG C, copper and mickel is added, makes casting feedstock finalization
It is 0.60wt% to study a point middle Cu contents, and Ni contents are 0.55wt%, 1480 DEG C, after composition detection is qualified are then heated to, by iron
Liquid temperature degree rises to 1500~1520 DEG C；Spheroidising, nodulizer FeSiMg5RE1 are carried out using the nodularization of lid bag method, nodulizer adds
Enter the 1.3wt% that amount is iron liquid gross weight, the nodularization burst time is 20 seconds, and the spheroidizing reacion time is 100 seconds；Late inoculation processing,
First time inoculation adds the ferrosilicon that granularity is 3~6mm, addition is iron liquid quality 0.6%, and second pregnant to be bred with stove
Educate processing to breed to be ladle-to-ladle, add granularity≤1mm ferrosilicon, addition is the 0.1% of iron liquid quality；With temperature be 1400~
1420 DEG C of iron liquid castings after abovementioned steps are handled；Casting is cooled to 550~600 DEG C in die cavity, clear through vibrating shakeout
After reason, casting is put into heat-treatment furnace, is heated up to 550~600 DEG C with 80 DEG C/h of programming rate, insulation 1 is small
When；900~920 DEG C are heated up to 120 DEG C/h of programming rate again, is incubated 2 hours；Casting is directly quenched after going out heat-treatment furnace
Enter in quenching tank, hardening media is sodium silicate solution, and the solution density is 1.20g/cm3, and initial temperature is 50 DEG C, and quenching is situated between
Matter is 1 with quenching workpiece mass ratio：After 7 casting temperatures are down to 350 DEG C, move into holding furnace, under the conditions of 350~380 DEG C
Insulation is air-cooled to room temperature after 2 hours；Casting after quenched step process is heated up to 250~320 DEG C, it is empty after being incubated 2 hours
It is cooled to room temperature；Cast(ing) surface uses cold rolling working hardening, rolling speed 45r/min, and rolling power is 3500N.
Together handled in company with casting with casting Annex III group test block, test block in production process, its assay is as follows：
| Tensile strength (Mpa) | Yield strength (Mpa) | Elongation percentage (%) | Case hardness（HB） | |
| No. 1 test block | 1289 | 1052 | 11.23 | 413 |
| No. 2 test blocks | 1273 | 1043 | 11.57 | 420 |
| No. 3 test blocks | 1271 | 1042 | 11.40 | 415 |
Embodiment 2：
Active scraper cutting knife preparation process, including prepare active scraper cutting knife disappearance apperance and group type；By most
Whole chemical composition：C3.6wt%, Si2.7wt%, Mn0.18wt%, P≤0.03wt%, S≤0.02wt%, Cu0.55wt%,
Mo0.29wt%, Ni0.53wt%, RE0.013wt%, Mg 0.025wt%, surplus are iron and impurity, and impurity ∑ T ＜ are disturbed in impurity
Casting feedstock is prepared in 0.1wt% requirement, using furnace cupola, electric induction furnace double melting, the casting feedstock after preparation is heated molten
Melt；The lime-based composite desulfurization agent of iron liquid 1wt% after melting is added in pouring ladle, then iron liquid is put into pouring ladle and carried out
Desulfurization process, skim, after desulfurization in iron liquid S content≤0.02wt%；In pouring ladle about 1/3 iron liquid is poured into electric furnace,
The iron liquid surface of electric furnace adds total iron liquid amount 1wt% carborundum and 0.29wt% molybdenum in pouring ladle, then will be remaining in pouring ladle
Iron liquid pour into electric furnace, be heated to 1450 DEG C and pre-processed, the carborundum granularity of addition is 3mm, and is bonded with cement
Lumps are made in agent；The Alloying Treatment at a temperature of 1450 DEG C, copper and mickel is added, makes Cu in the final chemical composition of casting feedstock
Content is 0.55wt%, and Ni contents are 0.53wt%, then heat to 1480 DEG C, after composition detection is qualified, bonded hard ferrite magnet is risen to
1500~1520 DEG C；Spheroidising is carried out using the nodularization of lid bag method, nodulizer FeSiMg5RE1, nodulizer addition is iron liquid
The 1.2wt% of gross weight, nodularization burst time are 23 seconds, and the spheroidizing reacion time is 90 seconds；Late inoculation processing, breeds for the first time
Handle to be bred with stove, add the ferrosilicon that granularity is 3~6mm, addition is iron liquid quality 0.45%, and second of inoculation is
It is ladle-to-ladle to breed, granularity≤1mm ferrosilicon is added, addition is 0.15 % of iron liquid quality；It is 1400~1420 with pouring temperature
Iron liquid casting DEG C after abovementioned steps are handled；Casting is cooled to 550~600 DEG C in die cavity, has been cleared up through vibrating shakeout
Bi Hou, casting is put into heat-treatment furnace, is heated up to 550~600 DEG C with 80 DEG C/h of programming rate, is incubated 1 hour；Again
900~920 DEG C are heated up to 120 DEG C/h of programming rate, is incubated 2 hours；Casting, which goes out after heat-treatment furnace, directly to be quenched into quenching
In groove, hardening media is sodium silicate solution, and the solution density is 1.18g/cm3, and initial temperature is 40 DEG C, and hardening media is with quenching
Firer's part mass ratio is 1：After 7.5 casting temperatures are down to 360 DEG C, move into holding furnace, 2 are incubated under the conditions of 350~380 DEG C
Room temperature is air-cooled to after hour；Casting after quenched step process is heated up to 250~320 DEG C, insulation is air-cooled to room after 2 hours
Temperature；Cast(ing) surface uses cold rolling working hardening, rolling speed 45r/min, and rolling power is 3500N.
Together handled in company with casting with casting Annex III group test block, test block in production process, its assay is as follows：
| Tensile strength (Mpa) | Yield strength (Mpa) | Elongation percentage (%) | Case hardness（BH） | |
| No. 4 test blocks | 1289 | 1045 | 10.15 | 426 |
| No. 5 test blocks | 1283 | 1047 | 11.01 | 417 |
| No. 6 test blocks | 1291 | 1039 | 11.11 | 421 |
Embodiment 3：
Active scraper cutting knife preparation process, including prepare active scraper cutting knife disappearance apperance and group type；By most
Whole chemical composition：C3.8wt%, Si 2.8wt%, Mn0.19wt%, P≤0.03wt%, S≤0.02wt%, Cu 0.50wt%,
Mo0.30wt%, Ni0.50wt%, RE0.015wt%, Mg0.02wt%, surplus are iron and impurity, and impurity ∑ T ＜ are disturbed in impurity
Casting feedstock is prepared in 0.1wt% requirement, using furnace cupola, electric induction furnace double melting, the casting feedstock after preparation is heated molten
Melt；The lime-based composite desulfurization agent of iron liquid 0.8wt% after melting is added in pouring ladle, then is put into pouring ladle by iron liquid
Row desulfurization process, skims, after being melted after desulfurization in iron liquid S content≤0.02wt%；In pouring ladle about 1/3 iron liquid is poured into
In electric furnace, total iron liquid amount 1.2wt% carborundum and 0.30wt% molybdenum in pouring ladle are added on the iron liquid surface of electric furnace, then will pour
Remaining iron liquid is poured into electric furnace in note bag, is heated to 1450 DEG C and is pre-processed, the carborundum granularity of addition is 1mm, is used in combination
Lumps are made as binding agent in cement；The Alloying Treatment at a temperature of 1450 DEG C, copper and mickel is added, makes casting feedstock finalization
It is 0.50wt% to study a point middle Cu contents, and Ni contents are 0.50wt%, 1480 DEG C, after composition detection is qualified are then heated to, by iron
Liquid temperature degree rises to 1500~1520 DEG C；Spheroidising, nodulizer FeSiMg5RE1 are carried out using the nodularization of lid bag method, nodulizer adds
Enter the 1.1wt% that amount is iron liquid gross weight, the nodularization burst time is 25 seconds, and the spheroidizing reacion time is 80 seconds；Late inoculation processing,
First time inoculation adds the ferrosilicon that granularity is 3~6mm, addition is the 0.3% of iron liquid quality, for the second time to be bred with stove
Inoculation breeds to be ladle-to-ladle, adds granularity≤1mm ferrosilicon, and addition is 0.2 % of iron liquid quality；It is with pouring temperature
1400~1420 DEG C of iron liquid castings after abovementioned steps are handled；Casting is cooled to 550~600 DEG C in die cavity, through vibrations
After peeling, casting is put into heat-treatment furnace, 550~600 DEG C is heated up to 80 DEG C/h of programming rate, protects
Temperature 1 hour；900~920 DEG C are heated up to 120 DEG C/h of programming rate again, is incubated 2 hours；Casting goes out after heat-treatment furnace directly
Connect in quenching tank of quenching, hardening media is sodium silicate solution, and the solution density is 1.15g/cm3, and initial temperature is 30 DEG C, is quenched
Fiery medium is 1 with quenching workpiece mass ratio：After 8 casting temperatures are down to 380 DEG C, move into holding furnace, in 350~380 DEG C of bars
Room temperature is air-cooled to after being incubated 2 hours under part；Casting after quenched step process is heated up to 250~320 DEG C, is incubated 2 hours
After be air-cooled to room temperature；Cast(ing) surface uses cold rolling working hardening, rolling speed 45r/min, and rolling power is 3500N.
Together handled in company with casting with casting Annex III group test block, test block in production process, its assay is as follows：
| Tensile strength (Mpa) | Yield strength (Mpa) | Elongation percentage (%) | Case hardness（BH） | |
| No. 7 test blocks | 1293 | 1054 | 10.92 | 423 |
| No. 8 test blocks | 1276 | 1038 | 11.02 | 418 |
| No. 9 test blocks | 1288 | 1044 | 11.12 | 425 |
Tensile strength presses standard GB/T/T1348-2009 in the present invention《Nodular iron casting》Method is detected；Surrender
Intensity presses standard GB/T/T1348-2009《Nodular iron casting》Test method is detected；Elongation percentage by standard GB/T/
T1348-2009《Nodular iron casting》Test method is detected；Case hardness presses standard GB/T/T 231-2012《Metal material
Expect Brinell hardness test》Method is detected.
The invention is not restricted to above preferred embodiment, the spirit that can be also limited in the claims in the present invention and specification
It is interior, the conversion and improvement of diversified forms are carried out, can solve same technical problem, and technique effect expected from acquirement, therefore do not weigh
State.One of ordinary skill in the art can be from all schemes that present disclosure is direct or associates, as long as in right
It is required that within the spirit limited, protection scope of the present invention is fallen within.
Claims (4)
1. a kind of active scraper cutting knife preparation method, including prepare active scraper cutting knife disappearance apperance and group type；Casting
The melting of part raw material, desulfurization, pretreatment, Alloying Treatment, spheroidising, inoculation, cast, quenching, tempering, surface peening step
Suddenly, it is characterised in that the casting feedstock presses final chemical composition：C3.5wt%~3.8wt%, Si2.5wt%~2.8wt%,
Mn0.17wt%~0.19wt%, P≤0.03wt%, S≤0.02wt%, Cu0.50wt%~0.60wt%, Mo0.28wt%~
0.30wt%, Ni0.50wt%~0.55wt%, RE0.010wt%~0.015wt%, Mg0.02wt%~0.03wt%, surplus be iron and
Impurity, impurity ∑ T ＜ 0.1wt% requirement is disturbed to be prepared in impurity；Casting feedstock after preparation is heated into melting；It is described
Desulfurization is the lime-based composite desulfurization agent of iron liquid 0.8wt%~1.2wt% after the addition melting in pouring ladle, iron after then melting
Liquid, which is put into pouring ladle, carries out desulfurization process, skims, after desulfurization in iron liquid S content≤0.02wt%；The pre-treatment step bag
Include and pour into pouring ladle 1/3 iron liquid in electric furnace, added on the iron liquid surface of electric furnace total iron liquid amount 0.8wt% in pouring ladle~
1.2wt% carborundum and 0.28wt%~0.30wt% molybdenum, then remaining iron liquid in pouring ladle is poured into electric furnace, it is heated to
1450℃；The Alloying Treatment makes Cu in the final chemical composition of casting feedstock to add copper and mickel at a temperature of 1450 DEG C
Content is 0.50wt%~0.60wt%, and Ni contents are 0.50wt%~0.55wt%, then heat to 1480 DEG C, composition detection is qualified
Afterwards, bonded hard ferrite magnet is risen to 1500~1520 DEG C；The spheroidising uses lid bag method nodularization, nodulizer FeSiMg5RE1,
Nodulizer addition is 1.1wt%~1.3wt% of iron liquid gross weight, and the nodularization burst time is 20~25 seconds, the spheroidizing reacion time
For 80~100 seconds；The inoculation is late inoculation processing, and inovulant used is ferrosilicon；The cast is to be with temperature
1400~1420 DEG C of iron liquid castings after inoculation step；The quenching Step includes：Casting is cooled in die cavity
550~600 DEG C, after vibrating shakeout cleans out, casting is put into heat-treatment furnace, the programming rate with 80 DEG C/h adds
Temperature is incubated 1 hour to 550~600 DEG C；900~920 DEG C are heated up to 120 DEG C/h of programming rate again, is incubated 2 hours；
Casting goes out after heat-treatment furnace in quenching tank of directly quenching, and after casting temperature is down to 350~380 DEG C, moves into holding furnace, 350
Room temperature is air-cooled to after being incubated 2 hours under the conditions of~380 DEG C；The tempering step includes：By the casting after quenched step process
250~320 DEG C are heated up to, insulation is air-cooled to room temperature after 2 hours；The surface peening step uses cold rolling working hardening, rolling
Speed 45r/min is pressed, rolling power is 3500N.
2. active scraper cutting knife preparation method according to claim 1, it is characterised in that：The pre-treatment step
The middle carborundum granularity used is 1~5mm, and lumps are made as binding agent with cement.
3. active scraper cutting knife preparation method according to claim 1, it is characterised in that：The inoculation is
Late inoculation processing；First time inoculation is breeds with stove, and the ferrosilicon granularity of addition is 3~6mm, and addition is iron liquid quality
0.3 %~0.6%；Second of inoculation breeds to be ladle-to-ladle, ferrosilicon granularity≤1mm of addition, and addition is iron liquid quality
The % of 0.1 %~0.2.
4. active scraper cutting knife preparation method according to claim 1, it is characterised in that：The quenching Step makes
It is hardening media with sodium silicate solution, the solution density is 1.15~1.20g/cm3, and initial temperature is 30 DEG C~50 DEG C, is quenched
Fiery medium is 1: 7~1: 8 with quenching workpiece mass ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611002465.6A CN106854727B (en) | 2016-11-15 | 2016-11-15 | A kind of active scraper cutting knife preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102560229B (en) * | 2011-12-17 | 2013-11-13 | 铜陵市镜铁粉厂 | Low chrome multielement alloy cast ball and preparing method thereof |
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Address after: 410100 No. 2 Dongshi Road, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: Hunan Jinlong Zhicheng Science and Technology Co., Ltd. Address before: 410100 12 East ten road, Changsha economic and Technological Development Zone, Changsha, Hunan Patentee before: Hunan Jinlong casting Limited by Share Ltd |
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Effective date of registration: 20190927 Address after: 410100 East ten road, Changsha economic and Technological Development Zone, Changsha City, Hunan Province, 12 Patentee after: Changsha Jinlong Foundry Industry Co., Ltd. Address before: 410100 No. 2 Dongshi Road, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee before: Hunan Jinlong Zhicheng Science and Technology Co., Ltd. |