CN106591683B - The processing method of cold roll tool steel - Google Patents
The processing method of cold roll tool steel Download PDFInfo
- Publication number
- CN106591683B CN106591683B CN201611206389.0A CN201611206389A CN106591683B CN 106591683 B CN106591683 B CN 106591683B CN 201611206389 A CN201611206389 A CN 201611206389A CN 106591683 B CN106591683 B CN 106591683B
- Authority
- CN
- China
- Prior art keywords
- cold roll
- steel ingot
- steel
- ingot
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/02—Making machine elements balls, rolls, or rollers, e.g. for bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K5/00—Making tools or tool parts, e.g. pliers
-
- 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
- C21D1/26—Methods of annealing
-
- 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
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- 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
- C21D2211/009—Pearlite
Abstract
The processing method of cold roll tool steel, it belongs to metallurgical technology field.The present invention is the processing method of cold roll tool steel, is comprised the following steps：Step 1, electric arc furnaces EBT are just refined, and LF refining, VD vacuum degassings, pour into cold roll tool steel electrode blank；Step 2, by cold roll tool steel electrode blank anneal, annealing is cleared up after coming out of the stove, and electroslag remelting is carried out after cleaning and obtains cold roll tool steel electroslag ingot, obtained cold roll tool steel electroslag ingot is annealed again, annealing is cleared up after coming out of the stove, and obtains cold roll tool steel annealing steel ingot；Step 3, cold roll tool steel annealing steel ingot is fitted into stove and be incubated, preheated and forged after heating, made annealing treatment after forging, obtain cold roll blank；Step 4, the cold roll blank for obtaining step 3 carry out smooth surface processing and flaw detection, obtain cold roll blank after the assay was approved.The product of processing method production of the present invention, distribution of carbides is tiny, disperse, service life length.
Description
Technical field
The invention belongs to metallurgical technology field；More particularly to a kind of processing method of cold roll tool steel.
Background technology
In recent years, as cold-rolled products develop to multi items, high intensity, Thin Specs direction, user is to cold-rolled products quality
More and more higher is required with performance, and the control accuracy of milling train also more and more higher, this requires to continually develop New Type of Cold Roller
Material, to adapt to the demand of milling train and production.
In cold-rolled process, cold roll will bear the draught pressure bigger than hot roll and severe friction brings shearing should
Power, and the failure and accident often occurred in rolling makes roll by mechanical shock and thermal shock, weld seam, folder plus rolled piece
The problems such as miscellaneous, side is split causes instantaneous high-temperature, cracks working roll, roll banding is even peeled off and scrapped.For work as adaptation
Make condition, cold roll will have high case hardness, excellent wearability and roughness retaining capability, while have anti-tired
Labor performance and anti-accident performance.In addition, with the development of rolling technique, the working environment of cold roll is also increasingly harsher, the body of roll
It is long-term to be in high load capacity, the poor working conditions of high speed, therefore it is badly in need of improving the performance of cold roll.
Mitsubishi iron company develops a kind of new high chromium forging steel cold roll, and experiment proves:Chromium content is carried by 3%
To 8%~10%, the wearability of roll can improve nearly twice height, can also be in relatively low quenching by adjusting the balance of carbon and chromium
At a temperature of obtain required cold roll hardness, so as to reduce fracture-sensitive, reduce fracture of roller accident, crack resistance changes
It is kind, available for top load, high speed cold roll.But the roller stock steel grade of 8%Cr contents is the base in 6%Cr content steel grades
On plinth, increase V and Mo constituent contents, Cr constituent contents add 2%, easy inside electroslag ingot due to alloy content increase
Serious component segregation is produced, steel ingot thermoplastic properties when forging processing are poor, and it is larger to manufacture difficulty.Roll Blank is used
Steel material carbide network itself, banding, liquation and field trash, gas, flaw detection etc. require that index is all very strict.
The content of the invention
The present invention seeks to provide a kind of cold rolling for improving steel ingot qualification rate, improving product quality based on cold roll tool steel
The processing method of roller tool steel.
The present invention is achieved through the following technical solutions：A kind of processing method of cold roll tool steel, comprises the following steps：
Step 1, electric arc furnaces EBT are just refined, and LF refining, VD vacuum degassings, pour into cold roll tool steel electrode blank；
Step 2, cold roll tool steel electrode blank made of step 1 annealed, annealing is cleared up after coming out of the stove, and is carried out after cleaning
Electroslag remelting obtains cold roll tool steel electroslag ingot, and obtained cold roll tool steel electroslag ingot is annealed again, moved back
Fire is cleared up after coming out of the stove, and obtains cold roll tool steel annealing steel ingot；
Step 3, the cold roll tool steel obtained in step 2 annealing steel ingot is fitted into heating furnace and be incubated, after preheating, heating
Forged, made annealing treatment after forging, obtain cold roll blank；
Step 4, the cold roll blank for obtaining step 3 carry out smooth surface processing and flaw detection, obtain after the assay was approved cold
Roll Blank.
The processing method of cold roll tool steel of the present invention, in step 1 vacuum refining keep vacuum be 67 pas with
Under, retention time 15min, argon gas 15min is led to after vacuum breaker；The heating-up temperature of electroslag remelting is 1650 DEG C~1750 in step 2
DEG C, the heat time is 10~20h；Annealing temperature is 840~860 DEG C in step 2, and annealing time is 20~25h.
The processing method of cold roll tool steel of the present invention, forging method comprises the following steps in step 3：
Step a：Cold roll instrument steel ingot after heating is placed on lower platform, the last benefit of cold roll instrument steel ingot
Contracting end face places one piece of arc upset plate above cold roll instrument steel ingot upward, then and carries out jumping-up, is in drafts
Cold roll tool steel annealing steel ingot original height 22%~25% when, pause 5s~10s, be further continued for jumping-up to cold roll tool steel
The 35%~40% of steel ingot original height, the cold roll instrument steel ingot after deformation is then returned into heating furnace and heated, is heated
1180 DEG C~1200 DEG C, soaking time 4h~6h of temperature, obtain deforming steel ingot；Step a is using arc upset plate to electroslag ingot
Jumping-up is carried out, can solve the problems, such as that electroslag ingot internal shrinkage is pressed into internal intensification, steel ingot end resection can be reduced, to improve
The lumber recovery of product, quiescent operation is taken in upsetting process, can make to recover inside electroslag ingot recrystallization to improve plasticity, keep away
Exempt to crack inside steel ingot, improve product qualification rate and reach 95%；
Step b：Using upper flat pattern anvil, lower V-type anvil mode, the deformation steel ingot that step a is obtained is pulled out, unilateral pressure
30mm~40mm is measured, then total deformation rate is heated the steel ingot deformed return heating furnace, heating temperature 15%~20%
1180 DEG C~1200 DEG C, soaking time 9h~10h of degree, obtain deforming steel ingot b；Unilateral 30mm~40mm is used when being pulled out after jumping-up
Light reduction slightly forges, and can reduce surface of steel ingot crackle, while carbide obtains a certain degree of broken, avoids inside steel ingot
Overheat, improve product qualification rate and reach 95%, reduce rejection number；
Step c：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot b is continued to pull out, unilateral drafts 60mm
Then~70mm, total deformation rate are heated the steel ingot deformed return heating furnace, heating-up temperature 1160 20%~25%
DEG C~1180 DEG C, soaking time 4h~6h, obtain deforming steel ingot c；After steel ingot is pulled out for the first time, return to heating furnace and added
Heat, heating-up temperature decline 20 DEG C, steel ingot over-heat inside phenomenon occur during follow-up forging processing to avoid producing, it is qualified to improve product
Rate reaches 95%, reduces rejection number；
Step d：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot c is continued to pull out, pulled out to steel ingot
The diameter of one segment length of the body of roll adds 45mm surpluses to technological requirement size, and the steel ingot deformed then is returned into heating furnace is carried out
Heating, 1160 DEG C~1180 DEG C, soaking time 4h~6h of heating-up temperature, obtain deforming steel ingot d；When forging the body of roll more than increase
Amount, it can be that following process improves certain compression ratio, improve product qualification rate and reach 95%；
Step e：Using upper flat pattern anvil, lower V-type anvil mode, one end roll neck for deforming steel ingot d is subjected to high temperature and stops forging pulling,
It is that upper flat pattern anvil pauses 4 seconds when touching deformation steel ingot d that described high temperature, which stops forging pulling, is then pulled out again, will be described
Technological requirement size is arrived in deformation steel ingot d one end roll neck diameter pulling, is then added the steel ingot deformed return heating furnace
Heat, 1160 DEG C~1180 DEG C, soaking time 60min~70min of heating-up temperature, obtain deforming steel ingot e；Roll neck is separately forged with the body of roll
Processing is made, can avoid cannot get pressure breaking at roll neck because of coarse grains, product qualification rate is improved and reaches 95%；
Step f：Using upper flat pattern anvil, lower V-type anvil mode, the other end roll neck progress high temperature for deforming steel ingot e is stopped into forging and pulled out
Long, it is that upper flat pattern anvil pauses 4s when touching deformation steel ingot d that described high temperature, which stops forging pulling, is then pulled out again, will be described
Technological requirement size is arrived in deformation steel ingot d one end roll neck diameter pulling, is then added the steel ingot deformed return heating furnace
Heat, 1160 DEG C~1180 DEG C, soaking time 60min~70min of heating-up temperature, obtain deforming steel ingot f；
Step g：Using upper flat pattern anvil, lower V-type anvil mode, the surface and glacing flatness for deforming steel ingot f are repaired, reached
Technological requirement, final forging temperature are controlled at 850 DEG C~900 DEG C, obtain cold roll tool steel deformation steel ingot.
The processing method of cold roll tool steel of the present invention, forging rear annealing temperature is two temperature ranges in step 3,
Anneal 12~16h first at a temperature of 870~890 DEG C, and then anneal at a temperature of 730~750 DEG C 20~25h again.
The processing method of cold roll tool steel of the present invention, heating furnace is heated in described step b, heating temperature
1200 DEG C of degree, soaking time 10h；Heating furnace is heated in described step c, 1180 DEG C of heating-up temperature, soaking time 6h；Steel
After ingot is pulled out for the first time, return to heating furnace and heated, heating-up temperature declines 20 DEG C compared to first time pulling, to avoid producing
There is steel ingot over-heat inside phenomenon during raw follow-up forging processing, improve product qualification rate and reach 95%, reduce rejection number.
The processing method of cold roll tool steel of the present invention, Cr contents are 8% in described cold roll tool steel.This
The processing method of the described cold roll tool steel of invention, the roller stock of the exsertile 8%Cr contents of the property produced, spherodized structure reach
2~3 grades, carbide network≤2.0 grade, carbide strip, carbide liquid-extraction≤1.0 grade, non-metallic inclusion summation≤2.0
Level, flaw detection qualification rate bring up to 95% by original 75%.The processing method production of cold roll tool steel of the present invention
Product, distribution of carbides is tiny, disperse, service life length.
Brief description of the drawings
Accompanying drawing 1 is the metallograph of the spherodized structure of the cold roll tool steel in the present invention；
Accompanying drawing 2 is the metallograph of the carbide lamellartiy of the cold roll tool steel in the present invention；
Accompanying drawing 3 is the metallograph of the carbide liquid-extraction tissue of the cold roll tool steel in the present invention；
Accompanying drawing 4 is the metallograph of the carbide network tissue of the cold roll tool steel in the present invention.
Embodiment
Embodiment one：
A kind of processing method of cold roll tool steel, comprises the following steps：
Step 1, electric arc furnaces EBT are just refined, and LF refining, VD vacuum degassings, pour into cold roll tool steel electrode blank；
Step 2, cold roll tool steel electrode blank made of step 1 annealed, annealing is cleared up after coming out of the stove, and is carried out after cleaning
Electroslag remelting obtains cold roll tool steel electroslag ingot, and obtained cold roll tool steel electroslag ingot is annealed again, moved back
Fire is cleared up after coming out of the stove, and obtains cold roll tool steel annealing steel ingot；
Step 3, the cold roll tool steel obtained in step 2 annealing steel ingot is fitted into stove and be incubated, preheated and heat and be laggard
Row forging, is made annealing treatment after forging, obtains cold roll blank；
Step 4, the cold roll blank for obtaining step 3 carry out smooth surface processing and flaw detection, obtain after the assay was approved cold
Roll Blank.
It is retention time 15min, after vacuum breaker below 67 pas that vacuum refining, which keeps vacuum, in present embodiment step 1
Logical argon gas 15min；
The heating-up temperature of electroslag remelting is 1750 DEG C in present embodiment step 2, heat time 20h；Annealed in step 2
Temperature is 860 DEG C, annealing time 25h.
Forging rear annealing temperature is two temperature ranges in step 3 in present embodiment, is annealed first at a temperature of 890 DEG C
13h, then anneal at a temperature of 750 DEG C 22h again.
Embodiment two：
The processing method of cold roll tool steel according to embodiment one, forging method is included such as in step 3
Lower step：
Step a：Cold roll instrument steel ingot after heating is placed on lower platform, the last benefit of cold roll instrument steel ingot
Contracting end face places one piece of arc upset plate above cold roll instrument steel ingot upward, then and carries out jumping-up, is in drafts
Cold roll instrument steel ingot original height 22% when, pause 5s, be further continued for jumping-up to cold roll instrument steel ingot original height
35%, the cold roll instrument steel ingot after deformation is then returned into heating furnace and heated, 1180 DEG C of heating-up temperature, soaking time
4h, obtain deforming steel ingot；
Step b：Using upper flat pattern anvil, lower V-type anvil mode, the deformation steel ingot that step a is obtained is pulled out, unilateral pressure
30mm is measured, then the steel ingot deformed return heating furnace is heated, 1180 DEG C of heating-up temperature, protected 15% by total deformation rate
Warm time 9h, obtain deforming steel ingot b；
Step c：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot b is continued to pull out, unilateral drafts
Then 60mm, total deformation rate are heated the steel ingot deformed return heating furnace, 1160 DEG C of heating-up temperature, insulation 20%
Time 4h, obtain deforming steel ingot c；
Step d：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot c is continued to pull out, pulled out to steel ingot
The diameter of one segment length of the body of roll adds 45mm surpluses to technological requirement size, and the steel ingot deformed then is returned into heating furnace is carried out
Heating, 1160 DEG C, soaking time 4h of heating-up temperature, obtain deforming steel ingot d；
Step e：Using upper flat pattern anvil, lower V-type anvil mode, one end roll neck for deforming steel ingot d is subjected to high temperature and stops forging pulling,
It is that upper flat pattern anvil pauses 4 seconds when touching deformation steel ingot d that described high temperature, which stops forging pulling, is then pulled out again, will be described
Technological requirement size is arrived in deformation steel ingot d one end roll neck diameter pulling, is then added the steel ingot deformed return heating furnace
Heat, 1160 DEG C, soaking time 60min of heating-up temperature, obtain deforming steel ingot e；
Step f：Using upper flat pattern anvil, lower V-type anvil mode, the other end roll neck progress high temperature for deforming steel ingot e is stopped into forging and pulled out
Long, it is that upper flat pattern anvil pauses 4s when touching deformation steel ingot d that described high temperature, which stops forging pulling, is then pulled out again, will be described
Technological requirement size is arrived in deformation steel ingot d one end roll neck diameter pulling, is then added the steel ingot deformed return heating furnace
Heat, 1160 DEG C, soaking time 60min of heating-up temperature, obtain deforming steel ingot f；
Step g：Using upper flat pattern anvil, lower V-type anvil mode, the surface and glacing flatness for deforming steel ingot f are repaired, reached
Technological requirement, final forging temperature are controlled at 850 DEG C, obtain cold roll tool steel deformation steel ingot.
The roller stock steel grade of 8%Cr contents is on the basis of 6%Cr content steel grades in present embodiment, increases V and Mo members
Cellulose content, Cr constituent contents add 2%, and due to alloy content increase, it is inclined that serious composition is also easy to produce inside electroslag ingot
Analysis, steel ingot thermoplastic properties when forging processing are poor, and it is larger to manufacture difficulty.Roll Blank steel material carbide itself
Netted, banding, liquation and field trash, gas, flaw detection etc. require that index is all very strict.According to this steel grade self-characteristic, rationally
Electroslag ingot high temperature homogenization temperature and time before forging is processed is formulated, when forging processing using the forging of " light-weight-light "
Mode, i.e. electroslag ingot will be forged slightly when forging the starting stage, after carbide obtains a certain degree of crush, then big pressure
Lower amount is forged, and is slightly forged using unilateral 30mm light reductions when being pulled out after jumping-up, can be single when coming out of the stove and pull out after stove insulation is returned
Side 60mm heavy reduction severes forge.
The processing method of cold roll tool steel described in present embodiment, the roller of the exsertile 8%Cr contents of the property produced
Base, as shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, spherodized structure reaches the metallograph of cold roll tool steel prepared by the present invention
To 2 grades, carbide network≤2.0 grade, carbide strip, carbide liquid-extraction≤1.0 grade, non-metallic inclusion summation≤2.0 grade,
Flaw detection qualification rate brings up to 95% by original 75%.
Embodiment three：
The processing method of cold roll tool steel according to embodiment one, forging method is included such as in step 3
Lower step：
Step a：Cold roll tool steel annealing steel ingot after heating is placed on lower platform, cold roll instrument steel ingot is most
Feeding end face upward, then places one piece of arc upset plate above cold roll instrument steel ingot and carries out jumping-up, depressing afterwards
Measure for the 25% of cold roll instrument steel ingot original height when, pause 10s, it is former to cold roll tool steel annealing steel ingot to be further continued for jumping-up
The 40% of height, the cold roll instrument steel ingot after deformation is then returned into heating furnace and heated, 1200 DEG C of heating-up temperature, is protected
Warm time 6h, obtain deforming steel ingot；
Step b：Using upper flat pattern anvil, lower V-type anvil mode, the deformation steel ingot that step a is obtained is pulled out, unilateral pressure
40mm is measured, then the steel ingot deformed return heating furnace is heated, 1200 DEG C of heating-up temperature, protected 20% by total deformation rate
Warm time 10h, obtain deforming steel ingot b；
Step c：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot b is continued to pull out, unilateral drafts
Then 70mm, total deformation rate are heated the steel ingot deformed return heating furnace, 1180 DEG C of heating-up temperature, insulation 25%
Time 6h, obtain deforming steel ingot c；
Step d：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot c is continued to pull out, pulled out to steel ingot
The diameter of a segment length (body of roll) add 45mm surpluses to technological requirement size, then the steel ingot deformed return heating furnace is entered
Row heating, 1180 DEG C, soaking time 6h of heating-up temperature, obtain deforming steel ingot d；
Step e：Using upper flat pattern anvil, lower V-type anvil mode, one end roll neck for deforming steel ingot d is subjected to high temperature and stops forging pulling,
It is that upper flat pattern anvil pauses 4 seconds when touching deformation steel ingot d that described high temperature, which stops forging pulling, is then pulled out again, will be described
Technological requirement size is arrived in deformation steel ingot d one end roll neck diameter pulling, is then added the steel ingot deformed return heating furnace
Heat, 1180 DEG C, soaking time 70min of heating-up temperature, obtain deforming steel ingot e；
Step f：Using upper flat pattern anvil, lower V-type anvil mode, the other end roll neck progress high temperature for deforming steel ingot e is stopped into forging and pulled out
Long, it is that upper flat pattern anvil pauses 4s when touching deformation steel ingot d that described high temperature, which stops forging pulling, is then pulled out again, will be described
Technological requirement size is arrived in deformation steel ingot d one end roll neck diameter pulling, is then added the steel ingot deformed return heating furnace
Heat, 1180 DEG C, soaking time 70min of heating-up temperature, obtain deforming steel ingot f；
Step g：Using upper flat pattern anvil, lower V-type anvil mode, the surface and glacing flatness for deforming steel ingot f are repaired, reached
Technological requirement, final forging temperature are controlled at 900 DEG C, obtain cold roll tool steel deformation steel ingot.
Present embodiment carries out jumping-up using arc upset plate to electroslag ingot, can solve electroslag ingot internal shrinkage and be pressed
Enter internal intensification problem, steel ingot end resection can be reduced；Quiescent operation is taken in upsetting process, can be made inside electroslag ingot
Recover recrystallization to improve plasticity, avoid cracking inside steel ingot；It is light using unilateral 40mm light reductions when being pulled out after jumping-up
Degree forges, and can reduce surface of steel ingot crackle, while carbide obtains a certain degree of broken, avoids steel ingot over-heat inside；Steel ingot
After being pulled out for the first time, return to heating furnace and heated, heating-up temperature declines 20 DEG C, is gone out with avoiding producing during follow-up forging processing
Existing steel ingot over-heat inside phenomenon；Increase surplus when forging the body of roll, can be that following process improves certain compression ratio；Roll neck and roller
Status opens forging processing, can avoid cannot get pressure breaking at roll neck because of coarse grains, to improve product qualification rate.
The processing method of cold roll tool steel described in present embodiment, the roller of the exsertile 8%Cr contents of the property produced
Base, spherodized structure reach 2 grades, carbide network≤2.0 grade, carbide strip, carbide liquid-extraction≤1.0 grade, nonmetal inclusion
Thing summation≤2.0 grade, flaw detection qualification rate bring up to 95% by original 75%.
Embodiment four：
The processing method of cold roll tool steel according to embodiment one, in step 1 EBT slightly refine+LF refining+
VD vacuum outgas, for the chemical composition requirement of 8%Cr content roller stocks, and consider to carry out easy scaling loss element during electroslag remelting
Scaling loss amount, set the internal control batch components of the steel grade first.It is tight during the smelting selection furnace charge of 8%Cr content roller stock steel
Lattice control harmful elements Pb, Sn, As, Sb, Bi content.P and skim full during suitable temperature, and ensure enough to take off the quantity of slag.When de-
Oxygen is good, and bits bleach, and is tapped when tapping temperature is suitable, tapping while Argon.Ladle is to giving electricity heating, heating behind LF refining position
Sample after certain time, met the requirements according to analysis result adjusting component.When molten steel temperature is suitable, after bits are white, deoxidation is good
Carry out vacuum refining.Below the pa of vacuum 67, kept for 15 minutes, soft argon blowing 15 minutes after vacuum breaker.Electrode blank is poured into a mould, in life
Suitable cast temperature and casting rate are selected during production.Electrode blank is annealed, and annealing is cleared up after coming out of the stove, and carries out electroslag weight
It is molten.
Embodiment five：
The processing method of cold roll tool steel according to embodiment one, during electroslag remelting, strengthen first pair
The baking of slag charge, it is ensured that the heating-up temperature of slag charge and heat time；And in slugging, slag charge will equably be added portionwise, to protect
Slugging quality is demonstrate,proved, is allowed for access refining period after scorification is clear.Especially it is noted that the control of feeding phase operation, shrinkage cavity depth is realized with guarantee
Degree is minimum, volume is minimum, improves the lumber recovery of ESR ingot.Speed is melted according to the control of ingot shape size reasonable in esr process
Rate, ensure melting rate equalization stable.ESR ingot is made annealing treatment, and cleaning sampling is carried out after annealing, then goes to forge plant progress
Heating, forging process.
Embodiment six：
The processing method of cold roll tool steel according to embodiment one, ESR ingot load stove heat to be expected,
After forging temperature is risen to, high temperature homogenization processing is carried out, its purpose is to improve or eliminate what is formed in metallurgical process
Uneven components, forged after heating and thermal insulation.Its forging characteristic is more weaker than 6%Cr content containing dimension by 8%Cr.Adopt
With jumping-up, the forging method of pulling, meet the requirement of forging ratio >=3, fully broken thick dendroid carbide.Temperature is less than
At 900 DEG C light reduction finishing can be carried out to steel ingot.The temperature of crucial control High temperature diffusion and soaking time, forging in forging process
That makes every fire time returns stove holding temperature and time, the control per the secondary deflection of fire and final forging temperature.
Heat treatment after forging is conditioning treatment, and its emphasis is to complete three tasks：First, net carbide is eliminated, second,
Eliminate stress softening tissue and obtain globular pearlite tissue, third, to reduce hydrogen content in steel, prevent the generation of white point；Therefore heat
Handling process curve is also made up of three parts：Normalizing+spheroidizing+expansion hydrogen annealing.Annealing process is formed by two sections.
Typically between 1160 DEG C~1180 DEG C, final forging temperature controls 850 DEG C~900 initial forging temperature during 8%Cr content blank forgings
Between DEG C, light reduction finishing is carried out to steel ingot below 900 DEG C, is not allow for aximal deformation value.
Claims (8)
- A kind of 1. processing method of cold roll tool steel, it is characterised in that：Comprise the following steps：Step 1, electric arc furnaces EBT are just refined, and LF refining, VD vacuum degassings, pour into cold roll tool steel electrode blank；Step 2, cold roll tool steel electrode blank made of step 1 annealed, annealing is cleared up after coming out of the stove, and electroslag is carried out after cleaning Remelting obtains cold roll tool steel electroslag ingot, and obtained cold roll tool steel electroslag ingot is annealed again, annealed out Cleared up after stove, obtain cold roll tool steel annealing steel ingot；Step 3, the cold roll tool steel obtained in step 2 annealing steel ingot is fitted into stove and be incubated, preheated and forged after heating Make, made annealing treatment after forging, obtain cold roll blank；Step 4, the cold roll blank for obtaining step 3 carry out smooth surface processing and flaw detection, obtain cold roll after the assay was approved Roller stock；Forging method comprises the following steps in step 3：Step a：Cold roll instrument steel ingot after heating is placed on lower platform, the last feeding end of cold roll instrument steel ingot Up, then place one piece of arc upset plate above cold roll instrument steel ingot and carry out jumping-up, be cold rolling in drafts Roller instrument steel ingot original height 22%~25% when, pause 5s~10s, it is former high to cold roll instrument steel ingot to be further continued for jumping-up The 35%~40% of degree, the cold roll instrument steel ingot after deformation is then returned into heating furnace and heated, heating-up temperature 1180 DEG C~1200 DEG C, soaking time 4h~6h, obtain deforming steel ingot；Step b：Using upper flat pattern anvil, lower V-type anvil mode, the deformation steel ingot that step a is obtained is pulled out, unilateral drafts Then 30mm~40mm, total deformation rate are heated the steel ingot deformed return heating furnace, heating-up temperature 15%~20% 1180 DEG C~1200 DEG C, soaking time 9h~10h, obtain deforming steel ingot b；Step c：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot b is continued to pull out, unilateral drafts 60mm~ Then 70mm, total deformation rate are heated the steel ingot deformed return heating furnace, 1160 DEG C of heating-up temperature 20%~25% ~1180 DEG C, soaking time 4h~6h, obtain deforming steel ingot c；Step d：Using upper flat pattern anvil, lower V-type anvil mode, deformation steel ingot c is continued to pull out, pulled out to the body of roll among steel ingot The diameter of a segment length add 45mm surpluses to technological requirement size, then the steel ingot deformed return heating furnace is added Heat, 1160 DEG C~1180 DEG C, soaking time 4h~6h of heating-up temperature, obtain deforming steel ingot d；Step e：Using upper flat pattern anvil, lower V-type anvil mode, one end roll neck for deforming steel ingot d is subjected to high temperature and stops forging pulling, it is described High temperature stop forging pulling to be upper flat pattern anvil pause 4 seconds when touching deformation steel ingot d, then pull out again, by described deformation Technological requirement size is arrived in steel ingot d one end roll neck diameter pulling, then heats the steel ingot deformed return heating furnace, adds Hot 1160 DEG C~1180 DEG C, soaking time 60min~70min of temperature, obtain deforming steel ingot e；Step f：Using upper flat pattern anvil, lower V-type anvil mode, the other end roll neck for deforming steel ingot e is subjected to high temperature and stops forging pulling, institute The high temperature stated stops forging pulling to be upper flat pattern anvil pauses when touching deformation steel ingot e 4s, then pulls out again, by described deformed steel Technological requirement size is arrived in ingot e one end roll neck diameter pulling, then heats the steel ingot deformed return heating furnace, heats 1160 DEG C~1180 DEG C, soaking time 60min~70min of temperature, obtain deforming steel ingot f；Step g：Using upper flat pattern anvil, lower V-type anvil mode, the surface and glacing flatness for deforming steel ingot f are repaired, reach technique It is required that final forging temperature control at 850 DEG C~900 DEG C, obtains cold roll tool steel deformation steel ingot.
- 2. the processing method of cold roll tool steel according to claim 1, it is characterised in that：Vacuum refining is protected in step 1 It is retention time 15min below 67 pas to hold vacuum, leads to argon gas 15min after vacuum breaker.
- 3. the processing method of cold roll tool steel according to claim 1 or 2, it is characterised in that：Electroslag remelting in step 2 Heating-up temperature be 1650~1750 DEG C, the heat time is 10~20h.
- 4. the processing method of cold roll tool steel according to claim 1 or 2, it is characterised in that：Annealing temperature in step 2 For 840~860 DEG C, annealing time is 20~25h.
- 5. the processing method of cold roll tool steel according to claim 1, it is characterised in that：Forging rear annealing temperature in step 3 Degree is two temperature ranges, and anneal 12~16h first at a temperature of 870~890 DEG C, then again at a temperature of 730~750 DEG C Anneal 20~25h.
- 6. the processing method of cold roll tool steel according to claim 1, it is characterised in that：Heated in described step b Stove is heated, 1200 DEG C of heating-up temperature, soaking time 10h.
- 7. the processing method of cold roll tool steel according to claim 1, it is characterised in that：Heated in described step c Stove is heated, 1180 DEG C of heating-up temperature, soaking time 6h.
- 8. the processing method of cold roll tool steel according to claim 1, it is characterised in that：Described cold roll tool and mould Cr contents are 8% in steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611206389.0A CN106591683B (en) | 2016-12-23 | 2016-12-23 | The processing method of cold roll tool steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611206389.0A CN106591683B (en) | 2016-12-23 | 2016-12-23 | The processing method of cold roll tool steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106591683A CN106591683A (en) | 2017-04-26 |
| CN106591683B true CN106591683B (en) | 2018-02-13 |
Family
ID=58603469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611206389.0A Active CN106591683B (en) | 2016-12-23 | 2016-12-23 | The processing method of cold roll tool steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106591683B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108942093B (en) * | 2018-07-05 | 2020-02-18 | 建龙北满特殊钢有限责任公司 | Manufacturing method of sector plate forge piece for economical coiler drum |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686666A (en) * | 2005-04-18 | 2005-10-26 | 宝钢集团上海五钢有限公司 | Production method of large high chromium steel cold roll blank |
| CN102418042B (en) * | 2011-11-16 | 2013-06-05 | 抚顺特殊钢股份有限公司 | Novel manufacturing process of phi 300 mm-phi 700 mm high-carbon high-chromium cold-working die steel forged round steel |
| CN105088085A (en) * | 2015-07-25 | 2015-11-25 | 宜兴市永昌轧辊有限公司 | High-performance cold mill intermediate roll and preparation method thereof |
| CN105349750B (en) * | 2015-10-29 | 2018-05-15 | 武钢集团襄阳重型装备材料有限公司 | High annealing drop-bottom and its manufacture method |
| CN105803314B (en) * | 2016-05-09 | 2018-03-27 | 天津钢研海德科技有限公司 | One kind has high performance advanced hot die steel and its manufacture method |
| CN105755391A (en) * | 2016-05-16 | 2016-07-13 | 昆山双儒模具科技有限公司 | Novel high-speed steel material and preparation process thereof |
| CN106086688A (en) * | 2016-08-29 | 2016-11-09 | 营口市特殊钢锻造有限责任公司 | A kind of Cr3 series hot die steel and heat treatment method thereof |
-
2016
- 2016-12-23 CN CN201611206389.0A patent/CN106591683B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106591683A (en) | 2017-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106734805B (en) | Φ 500~650mm Cr6 swaged forging Electro Slag Remelting Steel cold roll blank forging deformation techniques | |
| CN100519813C (en) | High-strength toughness cold working die steel and method of producing the same | |
| CN101812625B (en) | Smelting process of 1Cr13 stainless steel | |
| CN103409688B (en) | Large forged high-speed steel cold roll and manufacturing method thereof | |
| CN106917032A (en) | The method that reactor pressure vessel steels large thick-wall forging lifts low-temperature impact work | |
| CN1686666A (en) | Production method of large high chromium steel cold roll blank | |
| CN104438337B (en) | A kind of abrasion-resistant roller for cold rolling of strip steel and preparation method thereof | |
| CN103205645A (en) | Superlarge thickness hydrogen chromium molybdenum steel plate for hydrogenation equipment and manufacture method thereof | |
| CN106282836A (en) | Steam turbine is by 2Cr11MoVNbN forging and manufacture method thereof | |
| CN103949806B (en) | A kind of preparation method of welding wire | |
| CN103949798B (en) | A kind of preparation method of nickel-base alloy bare welding filler metal | |
| CN107739998B (en) | A kind of preparation method of flat cold-rolled sheet | |
| CN102268601B (en) | 50Cr3MoV steel for back-up roll and heat treatment method for steel | |
| CN108672625A (en) | A kind of processing method producing multi-step cold roll base using diameter forging machine | |
| CN104164630B (en) | A kind of high-strength corrosion-resisting auto parts machinery alloy steel material and manufacturing process thereof | |
| CN102337462B (en) | Production method for GCr15 bearing steel pipe | |
| CN102000954A (en) | Method for manufacturing continuous pipe mill retained mandrel | |
| CN110230005B (en) | Steel for high-carbon chromium cold roll blank and preparation method thereof | |
| CN105522085A (en) | Manufacturing method for large section forgings of high-speed tool steel | |
| CN109518079A (en) | A kind of production method of hydrogen-contacting equipment 15CrMoR steel plate | |
| CN103045949B (en) | Large marine high strength corrosion-resistant stainless-steel exhaust valve seat with internal orifice diameter of larger than 220 mm | |
| CN109280743A (en) | A kind of roll high-strength abrasion-proof steel and its production method | |
| CN106702252A (en) | High-temperature wear-resistant alloy steel material and preparation method thereof | |
| CN106591683B (en) | The processing method of cold roll tool steel | |
| CN101812624A (en) | Preparation of 1 Cr (Chromium) 13 thick wall tubular products of control rod of nuclear reactor control bar drive mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 161041, No. 7, red shore street, Fulaerji District, Heilongjiang, Qigihar Applicant after: Jianlong Beiman Special Steel Co. Ltd. Address before: 161041, No. 7, red shore street, Fulaerji District, Heilongjiang, Qigihar Applicant before: DONGBEI SPECIAL STEEL GROUP BEIMAN SPECIAL STEEL CO., LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |