CN106555116B - A kind of steel casting surface Hardening Treatment antifriction alloy shot and preparation method thereof - Google Patents
A kind of steel casting surface Hardening Treatment antifriction alloy shot and preparation method thereof Download PDFInfo
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- 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
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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
- C21D9/36—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for balls; for rollers
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- 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
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Abstract
The invention belongs to metal abrasives technical field, it is related to a kind of steel casting surface Hardening Treatment antifriction alloy shot and preparation method thereof, the weight percent of steel casting surface Hardening Treatment antifriction alloy shot each component are as follows: carbon 0.10~0.40%, silicon 0.10~0.50%, manganese 0.60~1.80%, chromium 0.5~1.50%, copper 0.30~0.80%, molybdenum 0.10~0.45%, vanadium 0.20~0.30%, boron 0.002~0.008%, sulphur < 0.040%, phosphorus < 0.040%, surplus are iron.The present invention while improving product strength and hardness, enhances its toughness by the way that a variety of alloying elements such as chromium, manganese, vanadium, molybdenum, copper and boron are added, and preferably solves the problems, such as to improve intensity and increase toughness and cannot take into account.Especially copper and boron and other alloying elements forms good synergistic effect, improves wear-resistant comprehensive performance of the product of the present invention as steel casting surface Hardening Treatment.
Description
Technical field
The invention belongs to metal abrasives technical fields, and in particular to one kind is for carrying out ball blast, blast cleaning to steel surface
With the alloy balls of intensive treatment and preparation method thereof.
Background technique
China's cast steel ball used at present is national standard GB6484/6485-86 product, weight percent composition always are as follows:
0.85~1.20%C, 0.40~1.50%Si, 0.60~1.20%Mn, 0~0.05%S, 0~0.05%P, surplus Fe.One
Aspect, phosphorus content is high, in cooling pelletization of several weeks, there are serious component segregation phenomenon in tissue, there is a large amount of secondary cementites
It is precipitated and high-carbon lamellar martensite is formed, cast steel ball surface generates a large amount of micro-crack, after quenching and tempering again, ingredient
Segregation can not be eliminated, and face crack quantity will continue to increase, and brittleness is still larger, to steel surface ball blast or spray cleaning
With it is easily broken during intensive treatment, waste is big, and the shorter of service life is according to international to shot fatigue life
Detection method-Irving (ERVIN) life test method detects, and the life value of S550 (1.7mm) is only to follow for 2600~2800 times
Ring.In the impeller blasting and intensive treatment for high strength steel, performance deficiency is more obvious.In order to solve above-mentioned technology
Problem, numerous researchers, to improve its intensity and hardness, are extended using circulation by adding alloying element on the basis of cast steel ball
Number and service life.For example, application No. is the patent of invention of 200810158312.X, quickly by the carbon content in cast steel ball
It is reduced to 0.1~0.30%, cast steel ball has been made, improves the toughness of product shot, its test life value can be made to improve
To 3500~3600 times, 30% is extended.But it is demonstrated experimentally that the cast steel ball due to hardness and strength decline so that surface peening
The gross efficiency of processing is declined.Application No. is 00129412.1 patents, and carbon content is reduced to carbon in 0.60~0.85%
Level, the content of manganese is reduced to 0.15~0.4%, joined the elements such as chromium, vanadium, molybdenum wherein, to enhance product strength, change
Kind toughness.On this basis, application No. is 201010602821.4 patents further by the content of chromium by 0.10~0.20%
It is increased to 0.70~1.20%, is prepared for low-carbon high-chromium alloy strengthened steel cast ball, intensity and hardness have obtained further mentioning
Height, ERVIN code test machine circulation experiment number have been up to 4130 times.But further increase under such element composition
Add the difficult of ERVIN code test machine circulation experiment number, because during adjusting shot alloying element, alloy balls
Intensity and its toughness be one it is contradictory two aspect, tend not to take into account well, this is also that the prior art does not solve very well
Certainly the problem of, therefore the intensity of alloy balls is improved simultaneously and toughness is to further increase the performance of shot to need the technology that solves
Problem.
Summary of the invention
The present invention is to solve the problems of the prior art, provides a kind of steel casting surface Hardening Treatment antifriction alloy shot
And preparation method thereof, the method for the present invention further improves its toughness while increasing substantially alloy balls intensity, hardness,
Improve its service performance.
In order to solve the above technical problems, the present invention is practiced using following technical scheme:
A kind of steel casting surface Hardening Treatment antifriction alloy shot, element weight percent are as follows:
Carbon 0.10~0.40%, silicon 0.10~0.50%, manganese 0.60~1.80%, chromium 0.5~1.50%, copper 0.30~
0.80%, molybdenum 0.10~0.45%, vanadium 0.20~0.30%, boron 0.002~0.008%, sulphur < 0.040%, phosphorus < 0.040%,
Surplus is iron and inevitable impurity.
Preferably, the steel casting surface Hardening Treatment antifriction alloy shot, element weight percent are as follows:
Carbon 0.20~0.30%, silicon 0.20~0.35%, manganese 0.80~1.20%, chromium 0.7~1.20%, copper 0.40~
0.60%, molybdenum 0.20~0.35%, vanadium 0.20~0.25%, boron 0.004~0.006%, sulphur < 0.040%, phosphorus < 0.040%,
Surplus is iron and inevitable impurity.
It is furthermore preferred that the steel casting surface Hardening Treatment antifriction alloy shot, element weight percent are as follows:
Carbon 0.25%, silicon 0.30%, manganese 1.00%, chromium 0.8%, copper 0.50%, molybdenum 0.30%, vanadium 0.22%, boron
0.005%, sulphur < 0.040%, phosphorus < 0.040%, surplus is iron and inevitable impurity.
The preparation method of above-mentioned steel casting surface Hardening Treatment antifriction alloy shot, comprising the following steps:
K. the element of raw material carbon steel waste material used, ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, ferro-boron and red copper is first measured
Composition, then according to the weight percentage of each element, raw material carbon steel waste material needed for calculating separately out, ferrosilicon, manganese iron, ferrochrome,
The weight of molybdenum-iron, vanadium iron, ferro-boron and red copper weighs up spare；
L. medium-frequency induction furnace is added in the carbon steel waste material weighed up, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron, opens intermediate frequency
Material in furnace is heated to 1600~1650 DEG C by power supply, makes its melting steel molten liquid one；
M. the ferro-boron weighed up is added in the steel molten liquid one of step b, make its sufficiently melt and be uniformly dispersed steel is molten
Melt liquid two；
N. the red copper weighed up is added in the steel molten liquid two of step c, it is made sufficiently to melt and be uniformly dispersed, it is molten to obtain steel
Melt liquid three；
O. the steel molten liquid three of step d is poured into tundish, then the fine aluminium that weight percent is 0.020% is used and is inserted
The method entered is added in the steel molten liquid three of the tundish, carries out deoxidation, the steel molten liquid four after obtaining deoxidation；
P. the steel molten liquid four of step e is used into water atomization process, so that molten steel is formed droplet, drop is on molten steel surface
Become spherical under the action of power, falls into pond, semi-finished product alloy balls are obtained after cooled and solidified；
Q. the semi-finished product alloy balls are pulled out from pond, are the fluidized bed drying of liquefied gas or natural gas through heat source
Furnace carries out flash baking, controls water content less than 1.0% (weight percent), obtains alloy balls dry product；
R. the alloy balls dry product is added continuous-type furnace, furnace temp control is at 810~850 DEG C, institute
The alloy balls dry product stated residence time in heating furnace is 30~40 minutes, is then quenched using the cold water lower than 35 DEG C
Processing obtains quenching alloy balls；
S. tempering furnace is added in the quenching alloy balls, the temperature of tempering furnace is controlled at 400~450 DEG C, stop
Between be 30~40 minutes, obtain tempering alloy balls；
T. the tempering alloy balls are subjected to cooling processing using air-cooled method, then carry out screening and obtains steel casting
Part intensive treatment antifriction alloy shot product.
Preferably, the preparation method of the steel casting surface Hardening Treatment antifriction alloy shot, in the step b, institute
The temperature for stating material in medium-frequency induction furnace heating furnace is 1630 DEG C.
Preferably, the preparation method of the steel casting surface Hardening Treatment antifriction alloy shot, in the step g, control
The water content of alloyage shot is less than 0.91%.
Preferably, the preparation method of the steel casting surface Hardening Treatment antifriction alloy shot in the step h, adds
Hot stove temperature is controlled at 830 DEG C, and alloy balls dry product residence time in heating furnace is 35 minutes, is then used and is lower than
30 DEG C of cold water is quenched, and quenching alloy balls are obtained.
Preferably, the preparation method of the steel casting surface Hardening Treatment antifriction alloy shot in the step i, is returned
At 420 DEG C, the residence time is 35 minutes for the temperature control of stove.
It is furthermore preferred that the preparation method of the steel casting surface Hardening Treatment antifriction alloy shot, including in detail below
Step:
Being pressed into furnace total weight is 1000kg, weight percentage of each element: carbon 0.15%, silicon 0.35%, manganese 1.20%, chromium
1.2%, copper 0.60%, molybdenum 0.35%, vanadium 0.25%, boron 0.006%, sulphur < 0.040%, phosphorus < 0.040%, surplus is iron, meter
Raw materials used weight, wherein ferrosilicon 0.65kg, manganese iron 8.64kg, ferrochrome 14.48kg, red copper 3.56kg, molybdenum-iron 5.67kg,
Vanadium iron 3.13kg, ferro-boron 0.27kg, the carbon steel waste material use the high-quality carbon knot that national standard is 15 for GB/T699-1999, the trade mark
Structure steel waste material, essential element weight percentage are carbon 0.143%, silicon 0.27%, manganese 0.45%, chromium 0.25%, copper
0.25%, required weight is 970kg；Intermediate frequency sense is added in load weighted carbon steel waste material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron
Answer electric furnace.It opens intermediate frequency power supply and material in furnace is heated to 1600~1650 DEG C, make its melting steel molten liquid one.It will weigh
Ferro-boron be added in the steel molten liquid one, so that it is sufficiently melted and is uniformly dispersed, obtain steel molten liquid two.By load weighted purple
Copper addition is described to be obtained in steel molten liquid two, so that it is sufficiently melted and is uniformly dispersed, is obtained steel molten liquid three；
Steel molten liquid three is poured into tundish, 0.2kg fine aluminium stick is then added by the tundish using the method for insertion
Molten liquid in, carry out deoxidation, obtain steel molten liquid four.Steel molten liquid four is granulated to obtain semi-finished product using water atomization process
Alloy balls.It pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed baking that heat source is liquefied gas or natural gas
Dry furnace carries out flash baking, obtains the alloy balls dry product that water content is 0.72% (weight percent).By the steel alloy
Ball dry product is sent into continuous-type furnace, and furnace temp is controlled at 830 DEG C, and the alloy balls dry product stops in heating furnace
Time is 35 minutes, is then quenched using 30 DEG C or so of cold water, and quenching alloy balls are obtained.By the quenching
Tempering furnace is added in alloy balls, and at 420 DEG C, the residence time is 35 minutes, obtains tempering alloy balls for the temperature control of tempering furnace.
The tempering alloy balls are subjected to cooling processing using air-cooled method, screening is then carried out and obtains steel casting intensive treatment
With antifriction alloy shot product.
It in the present invention,, can be under the content firstly, the carbon content in steel alloy is adjusted to 0.10~0.40%
Reduce molten liquid be frozen into component segregation and crizzle after spherical pellet, be quenched with after tempering, can be complete
Network carbide caused by component segregation is eliminated, brittleness is reduced, improves toughness, reduces percentage of damage and abrasion loss, simultaneously because
Carbon content is unlikely to too low, therefore little to the loss of product strength and hardness；Secondly, chromium, vanadium and the molybdenum of addition, can be improved and quench
The problem of permeability, and dispersion-strengthened action is played in crystal, hardness caused by offsetting carbon content and reducing reduces, improve quenching and
Hardness after tempering improves impact resistance and wear resistance, prolongs the service life；Again, the present invention is further in steel alloy
Copper and boron alloy element is added.Significant precipitation strength effect can be generated in steel since copper does not depend on carbon, nitrogen, copper
Good comprehensive performance can be obtained using its aging hardening effect by being added；The content of copper controls in 0.3~0.8% range,
ε-Cu phase will can be precipitated close to saturation state in steel, and generate precipitation strength, the intensity of steel is remarkably improved, simultaneously because splitting
Line extensions path receives the obstruction of tiny Cu-rich particle, so that steel, which has, does to obtain fatigue crack growth ability, it is tough to enhance its
Property.After boron is added in steel as microalloy element, to obtaining, tiny microstructure is highly advantageous, can get ferrite bainite and
Granular bainite microstructure is conducive to the toughness for enhancing alloy steel product, improves the comprehensive mechanical property of alloy steel product.Separately
Outside, the addition of boron can make tempering temperature carry out at 400 DEG C~450 DEG C of lower temperature.Especially copper and boron and other
Alloying element forms good synergistic effect, improves wear-resistant synthesis of the product of the present invention as steel casting surface Hardening Treatment
Performance.
The present invention has following significant effect compared with prior art:
(1) while improving product strength and hardness, its toughness is enhanced, preferably solves and improves intensity and increase
The problem of toughness cannot be taken into account.
(2) service life of product has obtained significantly extending, from testing machine 2600~2800 times of normal steel casting ball
Left and right, increases to 4350-4600 times quickly, also has more closely than other access times through the improved alloy cast steel ball of alloying
1000 times or more.
(3) compared to other improvements type cast steel ball product, the production cost of product of the present invention remains basically stable, so that of the invention
The sexual valence of product is relatively high.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Embodiment 1
Entering furnace total weight is 1000kg, alloy balls product element wt percentage composition: carbon 0.25%, silicon 0.30%, manganese
1.00%, chromium 0.8%, copper 0.50%, molybdenum 0.30%, vanadium 0.22%, boron 0.005%, sulphur < 0.040%, phosphorus < 0.040% is remaining
Amount is iron.It is calculated according to the element of each raw material listed in the element wt percentage composition requirement and table 1 composition raw materials used
Weight, wherein ferrosilicon 0.14kg, manganese iron 4.12kg, ferrochrome 8.40kg, red copper 2.53kg, molybdenum-iron 4.86kg, vanadium iron 2.76kg, boron
Iron 0.22kg.Carbon steel waste material uses the carbon constructional quality steel waste material that national standard is 25 for GB/T699-1999, the trade mark, main member
Plain weight percentage is carbon 0.25%, silicon 0.27%, manganese 0.65%, chromium 0.25%, copper 0.25%, and required weight is 980kg.
Load weighted carbon steel waste material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron are added to medium-frequency induction furnace.Opening intermediate frequency power supply will
Material is heated to 1600~1650 DEG C in furnace, makes its melting steel molten liquid one.The steel is added in load weighted ferro-boron to melt
Melt in liquid one, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid two.Load weighted red copper is added to the steel molten liquid
In two, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid three.
Steel molten liquid three is poured into tundish, 0.2kg fine aluminium stick is then added by the tundish using the method for insertion
Molten liquid in, carry out deoxidation, obtain steel molten liquid four.Steel molten liquid four is granulated to obtain semi-finished product using water atomization process
Alloy balls.It pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed baking that heat source is liquefied gas or natural gas
Dry furnace carries out flash baking, obtains the alloy balls dry product that water content is 0.83% (weight percent).By the steel alloy
Ball dry product is sent into continuous-type furnace, and furnace temp is controlled at 850 DEG C, and the alloy balls dry product stops in heating furnace
Time is 40 minutes, is then quenched using 30 DEG C or so of cold water, and quenching alloy balls are obtained.By the quenching
Tempering furnace is added in alloy balls, and at 450 DEG C, the residence time is 40 minutes, obtains tempering alloy balls for the temperature control of tempering furnace.
The tempering alloy balls are subjected to cooling processing using air-cooled method, screening is then carried out and obtains steel casting intensive treatment
With antifriction alloy shot product, the finished product gross weight 954kg of various model sizes.Product is used to be analyzed through direct-reading spectrometer and sulphur phosphorus
Instrument is measured component, carries out fatigue life cycle experiment using ERVIN fatigue criterion circulation testing machine.It the results are shown in Table 2.
Embodiment 2
Entering furnace total weight is 1000kg, alloy balls product element wt percentage composition: carbon 0.15%, silicon 0.35%, manganese
1.20%, chromium 1.2%, copper 0.60%, molybdenum 0.35%, vanadium 0.25%, boron 0.006%, sulphur < 0.040%, phosphorus < 0.040% is remaining
Amount is iron.It is calculated according to the element of each raw material listed in the element wt percentage composition requirement and table 1 composition raw materials used
Weight, wherein ferrosilicon 0.65kg, manganese iron 8.64kg, ferrochrome 14.48kg, red copper 3.56kg, molybdenum-iron 5.67kg, vanadium iron 3.13kg,
Ferro-boron 0.27kg.Carbon steel waste material uses the carbon constructional quality steel waste material that national standard is 15 for GB/T699-1999, the trade mark, main
Element wt percentage composition is carbon 0.143%, silicon 0.27%, manganese 0.45%, chromium 0.25%, copper 0.25%, and required weight is
970kg.Medium-frequency induction furnace is added in load weighted carbon steel waste material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron.Open medium frequency electric
Material in furnace is heated to 1630 DEG C by source, makes its melting steel molten liquid one.Load weighted ferro-boron is added to the steel melting
In liquid one, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid two.Steel molten liquid will be obtained described in the addition of load weighted red copper
In two, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid three.
Steel molten liquid three is poured into tundish, 0.2kg fine aluminium stick is then added by the tundish using the method for insertion
Molten liquid in, carry out deoxidation, obtain steel molten liquid four.Steel molten liquid four is granulated to obtain semi-finished product using water atomization process
Alloy balls.It pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed baking that heat source is liquefied gas or natural gas
Dry furnace carries out flash baking, obtains the alloy balls dry product that water content is 0.72% (weight percent).By the steel alloy
Ball dry product is sent into continuous-type furnace, and furnace temp is controlled at 830 DEG C, and the alloy balls dry product stops in heating furnace
Time is 35 minutes, is then quenched using 30 DEG C or so of cold water, and quenching alloy balls are obtained.By the quenching
Tempering furnace is added in alloy balls, and at 420 DEG C, the residence time is 35 minutes, obtains tempering alloy balls for the temperature control of tempering furnace.
The tempering alloy balls are subjected to cooling processing using air-cooled method, screening is then carried out and obtains steel casting intensive treatment
With antifriction alloy shot product, the finished product gross weight 963kg of various model sizes.Product is used to be analyzed through direct-reading spectrometer and sulphur phosphorus
Instrument is measured component, carries out fatigue life cycle experiment using ERVIN fatigue criterion circulation testing machine.It the results are shown in Table 2.
Embodiment 3
Entering furnace total weight is 1000kg, alloy balls product element wt percentage composition: carbon 0.30%, silicon 0.25%, manganese
0.80%, chromium 0.75%, copper 0.40%, molybdenum 0.20%, vanadium 0.20%, boron 0.004%, sulphur < 0.040%, phosphorus < 0.040% is remaining
Amount is iron.It is calculated according to the element of each raw material listed in the element wt percentage composition requirement and table 1 composition raw materials used
Weight, wherein ferrosilicon 0.41kg, manganese iron 4.04kg, ferrochrome 7.62kg, red copper 1.53kg, molybdenum-iron 3.24kg, vanadium iron 2.51kg, boron
Iron 0.18kg.Carbon steel waste material uses the carbon constructional quality steel waste material that national standard is 30 for GB/T699-1999, the trade mark, main member
Plain weight percentage is carbon 0.300%, silicon 0.20%, manganese 0.45%, chromium 0.25%, copper 0.25%, and required weight is
983kg.Medium-frequency induction furnace is added in load weighted carbon steel waste material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron.Open medium frequency electric
Material in furnace is heated to 1600~1650 DEG C by source, makes its melting steel molten liquid one.The addition of load weighted ferro-boron is described
In steel molten liquid one, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid two.The steel is added in load weighted red copper to melt
Melt in liquid two, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid three.
Steel molten liquid three is poured into tundish, 0.25kg fine aluminium stick is then added by the tundish using the method for insertion
Molten liquid in, carry out deoxidation, obtain steel molten liquid four.Steel molten liquid four is granulated to obtain semi-finished product using water atomization process
Alloy balls.It pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed baking that heat source is liquefied gas or natural gas
Dry furnace carries out flash baking, obtains the alloy balls dry product that water content is 0.68% (weight percent).By the steel alloy
Ball dry product is sent into continuous-type furnace, and furnace temp is controlled at 820 DEG C, and the alloy balls dry product stops in heating furnace
Time is 40 minutes, is then quenched using 30 DEG C or so of cold water, and quenching alloy balls are obtained.By the quenching
Tempering furnace is added in alloy balls, and at 430 DEG C, the residence time is 40 minutes, obtains tempering alloy balls for the temperature control of tempering furnace.
The tempering alloy balls are subjected to cooling processing using air-cooled method, screening is then carried out and obtains steel casting intensive treatment
With antifriction alloy shot product, the finished product gross weight 958kg of various model sizes.Product is used to be analyzed through direct-reading spectrometer and sulphur phosphorus
Instrument is measured component, carries out fatigue life cycle experiment using ERVIN fatigue criterion circulation testing machine.It the results are shown in Table 2.
Embodiment 4
Entering furnace total weight is 1000kg, alloy balls product element wt percentage composition: carbon 0.40%, silicon 0.45%, manganese
0.70%, chromium 1.50%, copper 0.30%, molybdenum 0.15%, vanadium 0.20%, boron 0.007%, sulphur < 0.040%, phosphorus < 0.040% is remaining
Amount is iron.It is calculated according to the element of each raw material listed in the element wt percentage composition requirement and table 1 composition raw materials used
Weight, wherein ferrosilicon 2.26kg, manganese iron 2.97kg, ferrochrome 19.00kg, red copper 0.56kg, molybdenum-iron 2.43kg, vanadium iron 2.51kg,
Ferro-boron 0.31kg.Carbon steel waste material uses the carbon constructional quality steel waste material that national standard is 40 for GB/T699-1999, the trade mark, main
Element wt percentage composition is carbon 0.41%, silicon 0.25%, manganese 0.45%, chromium 0.25%, copper 0.25%, and required weight is
970kg.Medium-frequency induction furnace is added in load weighted carbon steel waste material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron.Open medium frequency electric
Material in furnace is heated to 1600~1650 DEG C by source, makes its melting steel molten liquid one.The addition of load weighted ferro-boron is described
In steel molten liquid one, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid two.The steel is added in load weighted red copper to melt
Melt in liquid two, it is made sufficiently to melt and be uniformly dispersed, obtains steel molten liquid three.
Steel molten liquid three is poured into tundish, 0.25kg fine aluminium stick is then added by the tundish using the method for insertion
Molten liquid in, carry out deoxidation obtain steel molten liquid four.Steel molten liquid four is granulated to obtain semi-finished product using water atomization process
Alloy balls.It pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed baking that heat source is liquefied gas or natural gas
Dry furnace carries out flash baking, obtains the alloy balls dry product that water content is 0.91% (weight percent).By the steel alloy
Ball dry product is sent into continuous-type furnace, and furnace temp is controlled at 810 DEG C, and the alloy balls dry product stops in heating furnace
Time is 40 minutes, is then quenched using 30 DEG C or so of cold water, and quenching alloy balls are obtained.By the quenching
Tempering furnace is added in alloy balls, and at 450 DEG C, the residence time is 36 minutes, obtains tempering alloy balls for the temperature control of tempering furnace.
The tempering alloy balls are subjected to cooling processing using air-cooled method, screening is then carried out and obtains steel casting intensive treatment
With antifriction alloy shot product, the finished product gross weight 951kg of various model sizes.Product is used to be analyzed through direct-reading spectrometer and sulphur phosphorus
Instrument is measured component, carries out fatigue life cycle experiment using ERVIN fatigue criterion circulation testing machine.It the results are shown in Table 2.
Embodiment 5
Entering furnace total weight is 1000kg, alloy balls product element wt percentage composition: carbon 0.15%, silicon 0.30%, manganese
1.70%, chromium 1.30%, copper 0.80%, molybdenum 0.45%, vanadium 0.30%, boron 0.005%, sulphur < 0.040%, phosphorus < 0.040% is remaining
Amount is iron.It is calculated according to the element of each raw material listed in the element wt percentage composition requirement and table 1 composition raw materials used
Weight, wherein manganese iron 14.31kg, ferrochrome 16.01kg, red copper 5.56kg, molybdenum-iron 7.29kg, vanadium iron 3.76kg, ferro-boron 0.22kg.
Carbon steel waste material uses the carbon constructional quality steel waste material that national standard is 15 for GB/T699-1999, the trade mark, essential element weight hundred
It is grouped into carbon 0.143%, silicon 0.27%, manganese 0.45%, chromium 0.25%, copper 0.25%, required weight is 960kg.It will weigh
Medium-frequency induction furnace is added in carbon steel waste material well, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron.Intermediate frequency power supply is opened by material in furnace
1600~1650 DEG C are heated to, its melting steel molten liquid one is made.Load weighted ferro-boron is added in the steel molten liquid one,
So that it is sufficiently melted and is uniformly dispersed, obtains steel molten liquid two.Load weighted red copper is added in the steel molten liquid two, makes it
It sufficiently melts and is uniformly dispersed, obtain steel molten liquid three.
Steel molten liquid three is poured into tundish, 0.3kg fine aluminium stick is then added by the tundish using the method for insertion
Molten liquid in, carry out deoxidation, obtain steel molten liquid four.Steel molten liquid four is granulated to obtain semi-finished product using water atomization process
Alloy balls.It pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed baking that heat source is liquefied gas or natural gas
Dry furnace carries out flash baking, obtains the alloy balls dry product that water content is 0.91% (weight percent).By the steel alloy
Ball dry product is sent into continuous-type furnace, and furnace temp is controlled at 850 DEG C, and the alloy balls dry product stops in heating furnace
Time is 38 minutes, is then quenched using 30 DEG C or so of cold water, and quenching alloy balls are obtained.By the quenching
Tempering furnace is added in alloy balls, and at 440 DEG C, the residence time is 40 minutes, obtains tempering alloy balls for the temperature control of tempering furnace.
The tempering alloy balls are subjected to cooling processing using air-cooled method, screening is then carried out and obtains steel casting intensive treatment
With antifriction alloy shot product, the finished product gross weight 967kg of various model sizes.Product is used to be analyzed through direct-reading spectrometer and sulphur phosphorus
Instrument is measured component, carries out fatigue life cycle experiment using ERVIN fatigue criterion circulation testing machine.It the results are shown in Table 2.
Reference examples 1:
It is required according to the element wt percentage composition of national standard GB6484/6485-86 cast steel ball: 0.85~1.20%C, 0.40
~1.50%Si, 0.60~1.20%Mn, 0~0.05%S, 0~0.05%P, surplus Fe, the steel alloy element of this reference examples
Weight percent composition is selected are as follows: carbon 1.00%, silicon 0.80%, manganese 1.00%, sulphur < 0.05%, phosphorus < 0.05%, surplus are iron, are entered
Furnace total weight is 1000kg.It is formed and is counted according to the element of each raw material listed in the element wt percentage composition requirement and table 1
Raw materials used weight, wherein ferrosilicon 7.27, manganese iron 6.28kg, carburant 1.56kg.Carbon steel waste material uses national standard for GB/
T699-1999, the carbon constructional quality steel waste material that the trade mark is 85, essential element weight percentage are carbon 0.86%, silicon
0.25%, manganese 0.45%, chromium 0.25%, required weight are 985kg.By load weighted carbon steel waste material, ferrosilicon, manganese iron, carburant
Medium-frequency induction furnace is added.It opens intermediate frequency power supply and material in furnace is heated to 1600~1650 DEG C, make its melting steel molten liquid.
Molten liquid is poured into tundish, 0.25kg fine aluminium stick is then added by the molten of the tundish using the method for insertion
Melt in liquid, carries out deoxidation.It is granulated to obtain semi-finished product alloy balls using water atomization process.Pull described half out from pond
Final alloy shot is sent into the fluidized bed drying oven progress flash baking that heat source is liquefied gas or natural gas, and obtaining water content is
The alloy balls dry product of 0.89% (weight percent).The alloy balls dry product is sent into continuous-type furnace, heating furnace
Temperature is controlled at 830 DEG C, and alloy balls dry product residence time in heating furnace is 40 minutes, then uses 30 DEG C or so
Cold water be quenched, obtain quenching alloy balls.Tempering furnace, the temperature of tempering furnace is added in the quenching alloy balls
At 430 DEG C, the residence time is 40 minutes for degree control, obtains tempering alloy balls.By the tempering alloy balls using air-cooled
Method carry out cooling processing, then carry out screening obtain steel casting intensive treatment antifriction alloy shot product, various models
The finished product gross weight 974kg of size.Product is using component is measured through direct-reading spectrometer and sulphur phosphorus analyzer, using ERVIN
Fatigue criterion circulation testing machine carries out fatigue life cycle experiment.It the results are shown in Table 2.
Reference examples 2:
This reference examples 1 national standard GB6484/6485-86 cast steel ball composition of alloy of reference examples and on the basis of be added copper and boron member
Element, the element wt percentage composition of selected alloy balls: carbon 1.00%, silicon 0.80%, manganese 1.00%, copper 0.25%, boron
0.006%, sulphur < 0.05%, phosphorus < 0.05%, surplus is iron, and entering furnace total weight is 1000kg.According to the element composition requirement
Raw materials used weight is calculated with the element composition of each raw material listed in table 1, wherein ferrosilicon 7.27%, manganese iron 6.28kg, red copper
0.04kg, ferro-boron 0.22kg.The carbon constructional quality steel that carbon steel waste material uses national standard to be 85 for GB/T699-1999, the trade mark is useless
Material, essential element weight percentage are carbon 0.86%, silicon 0.25%, manganese 0.45%, chromium 0.25%, and required weight is
985kg.Medium-frequency induction furnace is added in load weighted carbon steel waste material, ferrosilicon, manganese iron, carburant etc..Intermediate frequency power supply is opened by furnace
Interior material is heated to 1600~1650 DEG C, makes its melting steel molten liquid.
Molten liquid is poured into tundish, 0.25kg fine aluminium stick is then added by the molten of the tundish using the method for insertion
Melt in liquid, carries out deoxidation.It is granulated to obtain semi-finished product alloy balls using water atomization process.Pull described half out from pond
Final alloy shot is sent into the fluidized bed drying oven progress flash baking that heat source is liquefied gas or natural gas, and obtaining water content is
The alloy balls dry product of 0.92% (weight percent).The alloy balls dry product is sent into continuous-type furnace, heating furnace
Temperature is controlled at 830 DEG C, and alloy balls dry product residence time in heating furnace is 40 minutes, then uses 30 DEG C or so
Cold water be quenched, obtain quenching alloy balls.Tempering furnace, the temperature of tempering furnace is added in the quenching alloy balls
At 430 DEG C, the residence time is 40 minutes for degree control, obtains tempering alloy balls.By the tempering alloy balls using air-cooled
Method carry out cooling processing, then carry out screening obtain steel casting intensive treatment antifriction alloy shot product, various models
The finished product gross weight 968kg of size.Product is using component is measured through direct-reading spectrometer and sulphur phosphorus analyzer, using ERVIN
Fatigue criterion circulation testing machine carries out fatigue life cycle experiment.It the results are shown in Table 2.
Reference examples 3:
Alloy balls element wt percentage composition of this reference examples referring to ZL00129412.1 patent of invention: carbon 0.60~
0.85%, silicon 0.40~1.50%, manganese 0.50~1.20%, chromium 0.15~0.40%, vanadium 0.10~0.20%, molybdenum 0.10~
0.20%, sulphur < 0.05%, phosphorus < 0.05%, surplus is iron, and the element wt percentage composition of this reference examples alloy balls is selected
For carbon 0.75%, silicon 0.90%, manganese 0.85%, chromium 0.28%, vanadium 0.15%, molybdenum 0.15%, sulphur < 0.05%, phosphorus < 0.05%,
Surplus is iron.Entering furnace total weight is 1000kg.It is formed and is counted according to the element of each raw material listed in the element composition requirement and table 1
Raw materials used weight, wherein ferrosilicon 8.54kg, manganese iron 4.59kg, ferrochrome 0.51kg, molybdenum-iron 2.43kg, vanadium iron 1.88kg.
Carbon steel waste material uses the carbon constructional quality steel waste material that national standard is 75 for GB/T699-1999, the trade mark, essential element weight hundred
Dividing content is carbon 0.75%, silicon 0.25%, manganese 0.45%, chromium 0.25%, and required weight is 983kg.Load weighted carbon steel is given up
Medium-frequency induction furnace is added in material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron.It opens intermediate frequency power supply and material in furnace is heated to 1600
~1650 DEG C, make its melting steel molten liquid.
Molten liquid is poured into tundish, 0.20kg fine aluminium stick is then added by the molten of the tundish using the method for insertion
Melt in liquid, carries out deoxidation.It is granulated to obtain semi-finished product alloy balls using water atomization process.Pull described half out from pond
Final alloy shot is sent into the fluidized bed drying oven progress flash baking that heat source is liquefied gas or natural gas, and obtaining water content is
The alloy balls dry product of 0.94% (weight percent).The alloy balls dry product is sent into continuous-type furnace, heating furnace
Temperature is controlled at 830 DEG C, and alloy balls dry product residence time in heating furnace is 40 minutes, then uses 30 DEG C or so
Cold water be quenched, obtain quenching alloy balls.Tempering furnace, the temperature of tempering furnace is added in the quenching alloy balls
At 430 DEG C, the residence time is 40 minutes for degree control, obtains tempering alloy balls.By the tempering alloy balls using air-cooled
Method carry out cooling processing, then carry out screening obtain steel casting intensive treatment antifriction alloy shot product, various models
The finished product gross weight 958kg of size.Product is using component is measured through direct-reading spectrometer and sulphur phosphorus analyzer, using ERVIN
Fatigue criterion circulation testing machine carries out fatigue life cycle experiment.It the results are shown in Table 2.
Reference examples 4:
Steel alloy element wt percentage composition of this reference examples referring to ZL20101060281.4 patent of invention: carbon 0.10~
0.20%, silicon 0.17~0.37%, manganese 0.35~0.65%, chromium 0.70~1.10%, sulphur < 0.035%, phosphorus < 0.035% is remaining
Amount is iron, and the alloy balls element wt percentage composition of this reference examples is chosen to be carbon 0.15%, silicon 0.27%, manganese 0.50%,
Chromium 0.90%, sulphur < 0.035%, phosphorus < 0.035%, surplus are iron.Entering furnace total weight is 1000kg.It is wanted according to element composition
The element composition of listed each raw material calculates raw materials used weight in summation table 1, wherein manganese iron 0.62kg, ferrochrome 9.86kg.Carbon
Steel waste material uses the carbon constructional quality steel waste material that national standard is 15 for GB/T699-1999, the trade mark, essential element weight percent
Content is carbon 0.143%, silicon 0.27%, manganese 0.45%, chromium 0.25%, and required weight is 990kg.Load weighted carbon steel is given up
Medium-frequency induction furnace is added in material, manganese iron, ferrochrome etc..It opens intermediate frequency power supply and material in furnace is heated to 1600~1650 DEG C, make it
Melting is steel molten liquid.
Molten liquid is poured into tundish, 0.20kg fine aluminium stick is then added by the molten of the tundish using the method for insertion
Melt in liquid, carries out deoxidation.It is granulated to obtain semi-finished product alloy balls using water atomization process.Pull described half out from pond
Final alloy shot is sent into the fluidized bed drying oven progress flash baking that heat source is liquefied gas or natural gas, and obtaining water content is
The alloy balls dry product of 0.84% (weight percent).The alloy balls dry product is sent into continuous-type furnace, heating furnace
Temperature is controlled at 830 DEG C, and alloy balls dry product residence time in heating furnace is 40 minutes, then uses 30 DEG C or so
Cold water be quenched, obtain quenching alloy balls.Tempering furnace, the temperature of tempering furnace is added in the quenching alloy balls
At 430 DEG C, the residence time is 40 minutes for degree control, obtains tempering alloy balls.By the tempering alloy balls using air-cooled
Method carry out cooling processing, then carry out screening obtain steel casting intensive treatment antifriction alloy shot product, various models
The finished product gross weight 954kg of size.Product is using component is measured through direct-reading spectrometer and sulphur phosphorus analyzer, using ERVIN
Fatigue criterion circulation testing machine carries out fatigue life cycle experiment.It the results are shown in Table 2.
The various starting material elements of table 1 form table
| Raw material | National standard | The trade mark | C | Si | Mn | Cr | V | Mo | Cu | B | P | S |
| Ferrosilicon | GB/T 2272-2009 | FeSi75AI1.0-B | 0.2 | 75.3 | 0.5 | 0.5 | 0.04 | 0.02 | ||||
| Manganese iron | GB/T 3795-2014 | FeMn88C0.2 | 0.2 | 1 | 88.6 | 0.15 | 0.02 | |||||
| Ferrochrome | GB/T 5683-2008 | FeCr65C0.15 | 0.25 | 1.5 | 66.2 | 0.03 | 0.025 | |||||
| Vanadium iron | GB/T4139-2012 | FeV80-A | 0.15 | 1.5 | 79.8 | 0.05 | 0.04 | |||||
| Molybdenum-iron | GB/T3649-2008 | FeMo60-A | 0.1 | 1 | 61.7 | 0.5 | 0.08 | 0.04 | ||||
| Ferro-boron | GB/T 5682-2015 | FeB22C0.1 | 0.1 | 4 | 22.4 | 0.03 | 0.01 | |||||
| Red copper | GB/T 5231-2001 | T3 | 99.7 | |||||||||
| Carburant | 96.0 |
The testing results such as each embodiment component analysis of table 2, hardness and cycle-index
Note: alloying element analysis uses Beijing using German Spike SPECTRO MAXx direct-reading spectrometer, carbon and sulphur contents
Wan Lianda letter section instrument CS-903 high frequency carbon and sulfur analytical instrument, fatigue test cycle-index uses ERVIN code test machine, used
The product type of each embodiment and reference examples is S550 (1.7mm).
It joined a variety of alloying elements such as chromium, manganese, vanadium, molybdenum, copper and boron in the present invention, improving product strength and hardness
Meanwhile its toughness is enhanced, it preferably solves the problems, such as to improve intensity and increase toughness and cannot take into account.Especially copper and boron with
Other alloying elements form good synergistic effect, improve product of the present invention as the wear-resistant of steel casting surface Hardening Treatment
Comprehensive performance makes the service life of product obtain significantly extending, and ERVIN testing machine cycle-index is from normal steel casting ball
Testing machine 2800 times and other patented technologies improved 3980, increase to 4350-4600 times of the present patent application.
Claims (5)
1. a kind of preparation method of steel casting surface Hardening Treatment antifriction alloy shot, the steel casting surface Hardening Treatment is used
Weight percentage of each element is in antifriction alloy shot, carbon 0.25~0.40%, silicon 0.10~0.50%, manganese 0.60~
1.80%, chromium 0.5~1.50%, copper 0.30~0.80%, molybdenum 0.10~0.45%, vanadium 0.20~0.30%, boron 0.002~
0.008%, sulphur < 0.040%, phosphorus < 0.040%, surplus is iron and inevitable impurity, it is characterized in that the preparation method includes
Following steps:
A. the element composition of raw material carbon steel waste material used, ferrosilicon, manganese iron, ferrochrome, molybdenum-iron, vanadium iron, ferro-boron and red copper is first measured,
Then according to the weight percentage of each element, raw material carbon steel waste material needed for calculating separately out, ferrosilicon, manganese iron, ferrochrome, molybdenum-iron,
The weight of vanadium iron, ferro-boron and red copper weighs up spare；
B. medium-frequency induction furnace is added in the carbon steel waste material weighed up, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron, opens intermediate frequency power supply
Material in furnace is heated to 1630 DEG C, makes its melting steel molten liquid one；
C. the ferro-boron weighed up is added in the steel molten liquid one of step b, it is made sufficiently to melt and be uniformly dispersed and to obtain steel molten liquid
Two；
D. the red copper weighed up is added in the steel molten liquid two of step c, it is made sufficiently to melt and be uniformly dispersed, obtain steel molten liquid
Three；
E. the steel molten liquid three of step d is poured into tundish, the fine aluminium that weight percent is 0.020% is then used into insertion
Method is added in the steel molten liquid three of the tundish, carries out deoxidation, the steel molten liquid four after obtaining deoxidation；
F. the steel molten liquid four of step e is used into water atomization process, so that molten steel is formed droplet, drop is in molten steel surface tension
Become spherical under effect, falls into pond, semi-finished product alloy balls are obtained after cooled and solidified；
G. the semi-finished product alloy balls are pulled out from pond, through fluidized bed drying oven that heat source is liquefied gas or natural gas into
Row flash baking controls water content less than 1.0%, obtains alloy balls dry product；
H. continuous-type furnace is added in the alloy balls dry product, furnace temp is controlled at 810~850 DEG C, described
Alloy balls dry product residence time in heating furnace is 30~40 minutes, is then carried out at quenching using the cold water lower than 35 DEG C
Reason obtains quenching alloy balls；
I. the quenching alloy balls are added tempering furnace, the temperature control of tempering furnace is in 400~450 DEG C, residence time
30~40 minutes, obtain tempering alloy balls；
J. the tempering alloy balls are subjected to cooling processing using air-cooled method, it is strong then carries out screening acquisition steel casting
Change processing antifriction alloy shot product.
2. the preparation method of steel casting surface Hardening Treatment antifriction alloy shot as described in claim 1, characterized in that described
In step g, the water content of alloy balls is controlled less than 0.91%.
3. the preparation method of steel casting surface Hardening Treatment antifriction alloy shot as described in claim 1, characterized in that described
In step h, furnace temp is controlled at 830 DEG C, and alloy balls dry product residence time in heating furnace is 35 minutes, with
It is quenched afterwards using the cold water lower than 30 DEG C, obtains quenching alloy balls.
4. the preparation method of steel casting surface Hardening Treatment antifriction alloy shot as described in claim 1, characterized in that described
In step i, at 420 DEG C, the residence time is 35 minutes for the temperature control of tempering furnace.
5. the preparation method of steel casting surface Hardening Treatment antifriction alloy shot as described in claim 1, characterized in that including
Following steps:
Entering furnace total weight is 1000kg, alloy balls product element wt percentage composition: carbon 0.40%, silicon 0.45%, manganese
0.70%, chromium 1.50%, copper 0.30%, molybdenum 0.15%, vanadium 0.20%, boron 0.007%, sulphur < 0.040%, phosphorus < 0.040% is remaining
Amount is iron, is required to calculate raw materials used weight according to the element wt percentage composition, wherein ferrosilicon 2.26kg, manganese iron
2.97kg, ferrochrome 19.00kg, red copper 0.56kg, molybdenum-iron 2.43kg, vanadium iron 2.51kg, ferro-boron 0.31kg, carbon steel waste material use state
It is designated as GB/T699-1999, the carbon constructional quality steel waste material that the trade mark is 40, essential element weight percentage is carbon
0.41%, silicon 0.25%, manganese 0.45%, chromium 0.25%, copper 0.25%, required weight are 970kg；Load weighted carbon steel is given up
Medium-frequency induction furnace is added in material, ferrosilicon, manganese iron, ferrochrome, vanadium iron, molybdenum-iron, opens intermediate frequency power supply for material in furnace and is heated to 1600
~1650 DEG C, make its melting steel molten liquid one, load weighted ferro-boron is added in the steel molten liquid one, keeps it sufficiently molten
Change and be uniformly dispersed, obtain steel molten liquid two, load weighted red copper is added in the steel molten liquid two, melts it sufficiently simultaneously
It is uniformly dispersed, obtains steel molten liquid three；
Steel molten liquid three is poured into tundish, 0.25kg fine aluminium stick is then added by the molten of the tundish using the method for insertion
Melt in liquid, carry out deoxidation and obtain steel molten liquid four, steel molten liquid four is granulated to obtain semi-finished product alloy using water atomization process
Shot pulls the semi-finished product alloy balls out from pond, is sent into the fluidized bed drying oven that heat source is liquefied gas or natural gas
Flash baking is carried out, the alloy balls dry product that water content is 0.91% is obtained, the alloy balls dry product is sent into continous way
Heating furnace, furnace temp are controlled at 810 DEG C, and alloy balls dry product residence time in heating furnace is 40 minutes, with
It is quenched afterwards using 30 DEG C or so of cold water, obtains quenching alloy balls, the quenching alloy balls are added back
Stove, at 450 DEG C, the residence time is 36 minutes, obtains tempering alloy balls, the tempering is closed for the temperature control of tempering furnace
Golden shot carries out cooling processing using air-cooled method, then carries out screening and obtains steel casting intensive treatment antifriction alloy shot
Product.
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| JPS6475658A (en) * | 1987-09-16 | 1989-03-22 | Kobe Steel Ltd | Production of material for shot peening |
| JP4339483B2 (en) * | 2000-02-22 | 2009-10-07 | 株式会社神戸製鋼所 | Steel for cold forging with excellent chip disposal |
| CN101580919B (en) * | 2009-06-24 | 2011-06-01 | 山东开泰金属磨料股份有限公司 | Medium-carbon cast steel shot or medium-carbon cast steel grit and preparation method thereof |
| CN101857941B (en) * | 2010-06-02 | 2011-11-30 | 淄博大亚金属科技股份有限公司 | Manufacturing method of medium-carbon alloy cast steel shots |
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| CN101717890A (en) * | 2009-11-26 | 2010-06-02 | 三一重工股份有限公司 | Cast low alloy steel for grader blade and preparation method |
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