CN110438388A - A kind of preparation method of Austria horse alternating erosion resistant steel - Google Patents
A kind of preparation method of Austria horse alternating erosion resistant steel Download PDFInfo
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- CN110438388A CN110438388A CN201910724102.0A CN201910724102A CN110438388A CN 110438388 A CN110438388 A CN 110438388A CN 201910724102 A CN201910724102 A CN 201910724102A CN 110438388 A CN110438388 A CN 110438388A
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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Abstract
The invention discloses a kind of preparation methods of horse alternating erosion resistant steel difficult to understand, this method mainly uses weak carbide formation element a variety of a small amount of, carbon and silicon or aluminium are corresponding relationships, avoid Carbide Precipitation that alternating structure is promoted to be formed, after steel is heated to austenitizing area isothermal heat preservation a period of time, it is cooled fast to bainitic transformation area start temperature cooling slow cooling, after lonneal.It forms one layer of austenite, one layer of martensite and is alternately arranged structure organization.Horse alternating erosion resistant steel Main Tissues difficult to understand are the lath martensites of poor carbon and rich C film austenite is alternately arranged tissue, and the pattern that framework is similar to streaky pork exists.It is best to obtain high-strength and high ductility resistance HI high impact crackle convenient for control for entire simple production process, continuous production.Resistance to HI high impact, cutting and corrosive wear effect are best in a variety of contexts.Alloying component and simple production process, convenient for the control of mass production, good product quality, wearability are high.
Description
Technical field
The present invention relates to metal material processing technical fields, and in particular to a kind of preparation side of Austria horse alternating erosion resistant steel
Method.
Background technique
Abrasion-resistant metal erosion steel is mainly widely used in thermoelectricity, steel, smelting, machinery, coal, mine, chemical industry, cement, port
Conveying system, pulverized coal preparation system, the crushing systems of enterprises such as mouthful harbour etc. all wear on big mechanical equipment；
Abrasion mechanism-wear form mainly divides: scratch friction based on, blastic deformation abrasion based on, chemical attack, electrification
Corrosion is several to be occurred simultaneously, influences abrasion-resistant metal product quality factor depending on microstructure and mechanical property.Abrasion-resistant metal at present
Liner plate, steel ball substantially divide 3 major class, first kind potassium steel austenite structure casting liner plate, steel ball, the good impact resistance of advantage plasticity compared with
Good, mar-proof on the weak side, carbon content highly corrosion resistant is poor；Second class belongs to martensite or bainite structure after middle-low alloy steel quenching
Based on carbide, advantage intensity is high mar-proof good, and the undesirable impact resistance of toughness is on the weak side；Third class wear resistant cast iron is with high alloy shape
At carbide with master, advantage intensity is high mar-proof good, and impact resistance is on the weak side, and carbon is poor containing highly corrosion resistant.
Field application abrasion-resistant stee needs intensity to need toughness and plasticity again, and hardness is promoted well at present, reply cutting benefit reason.
But toughness raising is relatively difficult, it is poor that hardness low tenacity is precipitated in upper bainite feather globular cementite.Lower bainite tissue performance is opposite
It is better than upper bainite, but the smaller time length of temperature range for obtaining tissue also wants isothermal.It is answered in martensite toughness low-intensity height
Power is relatively large.Carbide-free Bainite needs to obtain under salt bath isothermal.Q-P-T technique first cools to MS point or less and is warming up to again
The process of creation carbon minute more than MS point.What the high-hardenabilities such as strength steel 3040SI, 300M and high epistasis obtained be martensite or
Bainite or shellfish horse heterogeneous structure, although intensity high tenacity might as well.It is tough but for the semi-autogenous mill liner plate as coped with large impact
Property deposit or inadequate.Can occur HI high impact, the various complicated abrasions of height cutting and high corrosion in the abrasion mechanism at scene simultaneously
Factor only leans on the abrasion-resistant stee based on hardness that can not cope with Various Complex abrasion environment.
Summary of the invention
For overcome it is above-mentioned there are deficiency, the present inventor attempted by long-term explorations and multiple experiment with
Effort, summarize more than Pros and Cons, invent one layer of austenite, one layer of martensite and be alternately arranged steel grade.Austenite reply is high
Impact, martensite body reply cutting, alleviates high-strength steel and avoids splitting under the action of heavily stressed impact and corrosion stress for a long time
Line extension.Specifically in 3040SI, 300M high-hardenability and high-strength steel grade and bainite, non-carbide bainitic steel, martensite
With keep reforming and innovate in Q-P-T, in conjunction with the former trade mark: 300M and 30CrMnSiNi, 40CrMnSiMO,
A kind of preparation method of horse alternating erosion resistant steel difficult to understand is proposed on the basis of the chemical analysis of 40CrNi2Si2MO, 4340Si.
The specific technical solution adopted of the present invention is: a kind of preparation method of Austria horse alternating erosion resistant steel it include following behaviour
Make:
Specific mainly includes selection alloy, smelts molding, is heat-treated, the several steps of tempering are specific as follows:
1) element is selected
Following main alloy element: C 0.2-0.8wt%, Si 0.5-2.5wt%, Al is selected by mass percentage
0.01-2.0wt%wt%, Mn 1.6-3.6wt%, Cr 0.6-2.0wt%, Ni 0.1-2.0wt%, Cu 0.1-1.0wt%,
Mo 0.01-0.5wt%, P 0-0.3wt%, S 0-0.03wt%, surplus Fe；It further include that following one or more of auxiliary are closed
Gold element: B 0-0.5wt%, W 0-1.0wt%, CO 0-0.5wt%, V 0-1.0wt%；
2) molding is smelted
It smelts and rolls, forging, casting and forming: above-mentioned alloy is smelted, then use casting or forging or roll
Room temperature is cooled to after technological forming.
3) be heat-treated and cooling: above-mentioned shaped article is warming up to 850 ± 100 ° again, and heat preservation 2 ± 1 hours arrive room temperature；Or again
650 ± 100 ° are heated to, slow cool down room temperature after heat preservation.
When specific operation, according to obtained steel type, one of following manner mode is can be used in smelting process:
Mode one: On-line Control rolling will be carried out after the above alloy melting austenitizing, control corresponding deflection and end
Temperature is rolled, plate or bar are prepared, then carries out being cooled to room temperature, then is warming up to after 900 degree or so heat preservations to room temperature, or reheat
Slow cool down room temperature after to 650 or so heat preservations；
Mode two: by the above alloy melting at On-line Control forging is carried out after reheating after slab or steel ingot, control is corresponding
Deflection and forging temperature, prepare plate or bar, then carry out being cooled to room temperature, then be warming up to 900 degree or so heat preservations to room
Temperature, or it is heated to slow cool down room temperature after 650 or so heat preservations；
Mode three: moulding by casting will be carried out after the above alloy melting austenitizing, is cooled to room temperature, then be warming up to 900
Room temperature is arrived in the heat preservation of degree left and right, or is heated to slow cool down room temperature after 650 or so heat preservations.
4) heat treatment (heating and cooling)
By the said goods by keeping the temperature 2 ± 1 hours after being heated to austenitic area, 500 ± 100 are cooled fast to after heat preservation again
After degree, then change the type of cooling, slow cooling to room temperature, 500 degree or less slow coolings to room temperature cooling velocity are per hour less than 75 degree, the time
1-3 days best；
Or it, by keeping the temperature 2 ± 1 hours after being heated to austenitic area, is cooled fast to after heat preservation using by the said goods
500 degree, then change slow cool down mode, in 400-100 degree region, isothermal time 2-100 hours, isothermal and bainite here
Isothermal difference is bainite and martensite fringe time and carbonation decompsition process and keeps austenite and do not decompose, and is as cold as equal steady point fastly very
Key must have incubation period temperature.
Wherein the water for including by austenitic area rapid cooling process used medium, quenching liquid, oil is cold, mist is cold, air-cooled, gas
It is cold, air-cooled.Slow cooling includes that furnace is cold, heap is cold, it is cold to bury.It includes that ash buries heat preservation that it is cold, which to bury Leng Hedui,.
Specific total process be by above-mentioned casting or have been subjected to offline rolling, the steel part of forging is made into required product, also wrap
Blank product needed for cold forming or thermoforming again is included, steel part is heated to austenitizing heat preservation；By by steel part from Austria
It is selected to be as cold as in bainite range fastly after family name's body keeping warm mode, cooling velocity reselection most slow cooling to room temperature.
5) tempering
The product that heat treatment obtains is subjected to lonneal processing again, handles the time 2 ± 1 hours, completes entire technique.
Obtained steel part is specifically heated to 300 degree of heat preservations to room temperature, is selected in certain temperature soaking time,
Direct Air-Cooled is cooled to room temperature and completes entire technical process and all terminate.
A kind of its essential concept of the preparation method of horse alternating erosion resistant steel difficult to understand provided by the invention is:
1, a variety of alloying elements of alloy lack the thinking of additive amount
Based on addition C-Si-Al-Mn-Cr-Ni-Cu system weak carbide formation element, alloy kind is more but few
The mode of dosage: in use, low C improve intensity.Al, Si, P and C are that corresponding relationship control carbide is not precipitated.Mn improves steel
Hardenability, harden ability and force down MS point.The addition of Cr, Mo, B move to right pearlite.Cu addition increases intensity and stablizes paralympic, anti-
Only hydrogen embrittlement, raising are anticorrosive.Ni, which proposes toughness increase, makes austenite and martensitic structure more stability.MO, which increases harden ability, makes Austria
Family name's body and martenaging martempering are more stable.Addition W addition can replace Mo, Ai, Si effect, and the increase of B harden ability at double is simultaneously
Strength reduction toughness is improved, though V is that strong carbide element can increase remained austenite content in steel.
2, molding thinking is smelted
C-Si-Al-Mn-Cr-Ni-Cu system weak carbide formation element, a variety of a small amount of modes are mainly solved by smelting
It prevents Carbide Precipitation from promoting the formation of one layer of austenite, one layer of martensitic structure, the harmful element left in steel is dropped to most
Low, later product moulding process may be cast as, forge, rolling mill practice, make place mat early period for the heat treatment in later period.
3, it is heat-treated thinking
By be heated to after formed product austenitic area heat preservation after held for some time, high-temperature region rapid cooling, austenitic area
To bainite range cooling rate, The faster the better, and the cooling rate of rapid cooling is unlimited, and key avoids pearlite and Carbide Precipitation, one layer of Ovshinsky
It is constant that one layer of martensite of body remains to room temperature.The slower the later cooling rate of bainite range the better, the time with respect to 2-100 hours, only
Control carbide be not precipitated, austenite keep film-form do not decompose, slow cool down speed is slower, allow thin film austenite and
One laminate martensitic structure refines and allows carbon atom to distribute toward austenite, and the more long tissue the stable to be incidentally tempered function.
Since the section of product is different, temperature is accordingly also different under the premise of can not be uniformly controlled in mass production, invention
Austenitic area is heat-treated to bainite range rapid cooling, the change cooling temperature point and slow cooling of bainite range to room temperature regulate and control
Main points.It is product hardness and toughness according to demand that bainite has rapid cooling to change slow cooling chief temperature spot to M-region point
Difference determines that slow cooling is mainly that the narrower martensitic structure of film is thinner after changing cooling rate, isothermal to the main high temperature isothermal of room temperature
The wider amount of austenite film is more, and still toughness is best for 400 degree of high temperature isothermal low strengths, and temperature spot declines isothermal with such
It pushes away, intensity gradually becomes obdurability and is gradually reduced.Isothermal has short elongated with the slow cooling time, mainly obtains the strong of horse alternating structure difficult to understand
Degree and carbon point process stablize paralympic tissue, and alternating structure structure proportion determines mechanical property according to alternating temperature point.Reach final mesh
Acquisition different mechanical properties one layer of austenite and one layer of alternately arranged stabilizing tissue of martensite.
4, it is tempered thinking
The stabilization of martensite residual austenite body tissue internal stress in cooling procedure and austenite is released after lonneal
Tissue.
This technology produces ingredient, simple process, controls well convenient for the mass production type of cooling.
The program is that optimization proposes a kind of a variety of few using C-Si-Al-Mn-Cr-Ni-UO system weak carbide formation element
Amount, avoids Carbide Precipitation from promoting to form alternating structure.After steel is heated to austenitizing area isothermal heat preservation a period of time, quickly
It is cooled to bainitic transformation area, the slower Bainite Region to martensitic regions (room temperature) the better, and carbide is kept not to be precipitated, and forms one layer
One layer of shellfish/martensite of one layer of martensite of austenite or one layer of austenite is alternately arranged structure organization to room temperature.Bainite Region to room
While warm cooling rate is in the martensite alternating structure formation of thin film austenite and a laminate item, also allow carbon atom from geneva
Body distributes (diffusion) toward austenite, so that rich carbon austenitic is no longer changed bainite or martensite when being subcooled, forming tissue is one layer
The bainite of the one laminate item of martensite or thin film austenite of one laminate item of film austenic, which is alternately arranged, to be stablized in room temperature
It is on active service.Austenite is responsible for coping with HI high impact, and martensite is responsible for coping with cutting abrasion, is alternately arranged the extension for mitigating crackle.
Heat treatment process since the section of product is different, temperature accordingly also it is different can not be uniformly controlled in mass production before
It puts, the present application is heat-treated austenitic area to bainite range rapid cooling, the change cooling temperature of bainite range to room temperature
The main points regulated and controled are put with slow cooling, and bainite to M-region point has rapid cooling to change slow cooling major temperature point.How alternating temperature is controlled
Point core the most, preferably reserved incubation period avoid Carbide Precipitation, the product hardness of the temperature of point according to demand and toughness difference
To determine.Change that slow cooling or isothermal after cooling rate mainly obtain Austria's horse alternating structure to room temperature and carbon divides process and alternating structure knot
The ratio and stability of structure.
Austenite changes cooling rate to bainite range point, and the mechanical property for becoming the temperature spot of slow cooling from rapid cooling is upper shellfish
Family name's body point relative intensity is low, and toughness is relatively best, among lower bainite point relative intensity, toughness relative drop, and martensite point phase
To intensity height, toughness is relatively low.The point of Bainite Region combines the mode of conventional high-strength steel midium temperature to high temperature tempering to room temperature cooling rate,
The different tempering temperature of high-strength steel obtains different mechanical properties, this mode is integrated to bainite range slow cooling to room temperature by we
Mode in.It is heat-treated high temperature rapid cooling The faster the better that the slower the corresponding following slow cooling of medium temperature the better, the of short duration tempering of low temperature releases horse
The internal stress of family name's body.
The technique of this patent steel is simple, controls production well convenient for mass production, can obtain one layer of austenite, one layer of martensitic phase
Mutual alternating structure, such as the pattern of streaky pork, this tissue resists high-strength steel crackle and cutting is best.
The beneficial effects of the present invention are: compared with prior art,
Transformation martensitic structure is worn after potassium steel is impacted using austenite structure to resist, and the resistance to HI high impact of advantage is not easy to crack
Line, easily-deformable after disadvantage impact, resistance to cutting abrasion is weak.
Steel alloy be substantially martensite obtain bainite structure add carbide and it is a small amount of it is paralympic come, the high disadvantage of advantage intensity
Poor toughness.Cast iron class is worn with carbide to resist, and advantage is also that the high disadvantage toughness of intensity is worse.
Carbide-free Bainite is formed in bainite temperatures above and is made of lath ferrite beam and the austenite not changed,
Referred to as easily occur carbide appearance in this tissue hyperthermia of carbide-free Bainite formation production process and blocky austenite be unstable,
Salt bath isothermal and equipment is needed to assist to obtain.
It allows carbon atom to carry out stable residual austenite toward austenite distribution during Q-P-T carbon point, but first reduces and heat up again
It is easy to appear carbide.
Steel alloy determines that the final application mechanical property of steel grade, high tempering internal stress are eliminated using different tempering temperatures
But strength reduction, lonneal intensity high internal stress are big.
The element that this patent is mainly formed using a variety of weak carbides and the mode that addition content mutually restricts less, evade pearl
Body of light and carbide occur.Heat treatment process enters the point of bainite range using austenite rapid cooling, and different temperature spots changes
Slow cooling, it is therefore an objective to high temperature section hardness low tenacity is best, and low-temperature zone hardness high tenacity is relatively low, using slow cooling or isothermal to room temperature,
It remains one layer of shellfish/martensitic structure of one layer of austenite, one layer of martensite or one layer of austenite always and allows tissue, austenite
Stability depend on austenite richness carbon content, slow cooling speed is slower or the longer austenite richness carbon of isothermal time is higher, Ovshinsky
Body is more stable, and tissue more refines.The existing acquisition of the invention horse alternating structure difficult to understand, and have carbon point process, there are also adjust mechanics function
And the function that lonneal internal stress is big.
So this patent is a variety of a small amount of using weak carbide formation alloying element, using rapid cooling plus slow cooling technique bayesian
Body, martensite, carbides-free, Q-P-T, different tempering temperatures obtain different mechanical properties, lonneal intensity high internal stress
All advantages such as big are all summarized to inside rapid cooling and slow cooling.Obtain one layer of austenite and one layer of martensite alternating structure
Erosion resistant steel, tissue hinder crack propagation as that streaky pork pattern is alternately arranged resistance to HI high impact is splendid.One layer of austenite copes with Gao Chong
Abrasion is hit, one layer of martensite copes with cutting abrasion, this steel mechanical property intensity > HRC40 ballistic work > V-type 50J copes with abrasion machine
HI high impact and cutting are best in reason, while coping with the various complicated wear factors of appearance and showing good abrasion resistant effect.
Detailed description of the invention
Fig. 1 is formed product process organization structural evolution schematic diagram.
Fig. 2 is first rapid cooling slow cooling temperature profile again in present invention process.
Fig. 3 is the temperature profile of first rapid cooling isothermal again in present invention process.
Specific embodiment
To keep the object of the invention, technical solution and advantage clearer, below to the technical side in embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than complete
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention, the corresponding relationship of rapid cooling and slow cooling and is returned
Fire uses lonneal.Therefore, the detailed description of embodiments of the present invention presented below is not intended to limit claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.
Embodiment 1
The present embodiment is mainly suitble to big section complicated shape, large impact wearing piece, and liner plate, steel ball etc. prepare horse difficult to understand
Alternately multi-phase wear-resistant loses steel.
Wherein main alloy element: C 0.2wt%, Mn 1.8wt%, Si 1.4wt%, Cr 1.0wt%, Mo
0.2wt%, Ni 0.5wt%, Cu 0.5wt%, surplus Fe.
After above-mentioned alloying element is formed using forging or rolling or casting technique, then carry out being cooled to room temperature, then heat up
To 900 degree keep the temperature 2 hours it is air-cooled arrive room temperature, be heated to 650 or so heat preservation after slow cool down room temperature.
Be heated to 850 temperature, after heat preservation using quenching liquid inside and outside temperature to 450 degree hereinafter, cooling rate is greater than 5 per minute
Degree arrives room temperature into furnace cooling rate less than 50 degree per hour.
Tempering process: being heated to 250 degree of inside holdings after 2 hours, air-cooled to arrive room temperature.
Obtain tissue: one layer of austenite, one layer of martensite/bainite is alternately arranged tissue.
Product mechanical property after tested are as follows: thickness of workpiece 10-100 ㎜；Hardness HRC30-40, ballistic work V-type > 100J.
Embodiment 2
The present embodiment is suitble to big section complicated shape, large impact wearing piece, and liner plate, steel ball etc. prepare a kind of horse friendship difficult to understand
Steel is lost for multi-phase wear-resistant, specific as follows:
Wherein main alloy element: C 0.3wt%, Mn 2.5wt%, Si 1wt%, Al0.5wt%, Cr 1.5wt%；
Mo 0.4wt%, Ni 0.5wt%, Cu 0.5wt%, additional elements V0.03wt% surplus are Fe.
Quenching technical:
After forging or rolling or casting technique molding, then cool down air-cooled to slow cool down room after 650 or so heat preservations
Temperature.
900 temperature are heated to, are as cold as 350 degree using hot oil after heat preservation, cooling rate is greater than 20 degree to 350 degree per minute, and 350
Degree is air-cooled after isothermal 4 hours to arrive room temperature.
Tempering process: 300 degree of inside holdings are heated to after 2 hours, are cooled to room temperature.
Obtain tissue: one layer of martensite, one layer of austenite is alternately arranged tissue.
Product mechanical property after tested are as follows: hardness HRC30-50, ballistic work V-type > 50J, thickness 100-300 ㎜.
Embodiment 3
The present embodiment is suitble to big section complicated shape, large impact wearing piece, and liner plate, steel ball etc. prepare a kind of horse friendship difficult to understand
Steel is lost for multi-phase wear-resistant, specific as follows:
Wherein main alloy element: C 0.3wt%, Mn 2.5wt%, Si 1.8wt%, Cr 1.5wt%；Mo
0.4wt%, Ni 1.5wt%, Cu 0.5wt%, additional elements V0.03wt% surplus are Fe.
Quenching technical:
After forging or rolling or casting technique molding, then cool down air-cooled to slow cool down room after 650 or so heat preservations
Temperature.
Be heated to 900 temperature, using air-cooled after heat preservation, cooling rate is greater than 20 degree to 450 degree per minute, 450 degree of ashes bury it is cold,
Room temperature is arrived after 2 days.
Tempering process: being heated to 200 degree of inside holdings after 1 hour, air-cooled to arrive room temperature.
Obtain tissue: one layer of martensite, one layer of austenite is alternately arranged tissue.
Product mechanical property after tested are as follows: hardness HRC40-50, ballistic work V-type > 50J, thickness 100-300 ㎜.
Embodiment 4
The present embodiment is suitble to big section complicated shape, large impact wearing piece, and liner plate, steel ball etc. prepare a kind of horse Austria friendship
Steel is lost for multi-phase wear-resistant, specific as follows:
Wherein main alloy element: C 0.6wt%, Mn 3.5wt%, Si 2wt%, Al 1wt%, Cr 1.0wt%, Mo
0.2wt%, Ni 1.3wt%, Cu 0.3wt%, assistant alloy element B 0.003wt%, CO0.03wt% surplus are Fe.
Quenching technical:
After forging or rolling or casting technique molding, then carry out being cooled to room temperature, then be warming up to 900 degree or so heat preservations
1 hour air-cooled to room temperature, is heated to slow cool down room temperature after 650 or so heat preservations.
950 temperature are heated to, are as cold as 450 degree hereinafter, cooling rate is greater than 10 degree per minute, into ash using water mist after heat preservation
Bury it is cold, cooling rate per hour less than 5 degree the time 2 days arrive room temperature.
Tempering process: air-cooled to arrive room temperature after being heated to 250 degree of inside holdings.
Obtain tissue: one layer of martensite, one layer of austenite is alternately arranged tissue.
Product mechanical property after tested are as follows: hardness HRC50-60, ballistic work V-type > 50J, thickness 100-500 ㎜.
Embodiment 5
A kind of preparation method of horse Austria alternating multi-phase wear-resistant erosion steel, specific as follows:
1, wherein main alloy element: C 0.8wt%, Mn 2.0wt%, Si 1.5wt%, Al 1.5wt%；Ni
0.5wt%, assistant alloy element B 0.005wt% surplus are Fe.
2, it will carry out carrying out again after line is heat-fed controlled rolling ratio or required product is made in forging ratio after above-mentioned alloy melting
Heap is as cold as room temperature, then cools down room temperature after heating up 660 degree of heat preservations 8 hours,
3, by above-mentioned steel part；From room temperature be heated to complete austenitizing keep the temperature 1.5 hours after, it is direct from austenitic state
It is cooled to 300 degree fastly with gas, arrived room temperature with dust heap cold 90 hours；
4, after keeping the temperature 2 hours for 150 degree of above-mentioned reheating, direct water-cooling is fully completed to room temperature.
Product mechanical property after tested are as follows: hardness HRC65, ballistic work V-type 20J, organizations tructure are martensite and Austria
Family name's body alternating structure.
Embodiment 6
A kind of preparation method of horse Austria alternating multi-phase wear-resistant erosion steel, specific as follows:
1, wherein main alloy element: C 0.5wt%, Mn 2.5wt%, Si 1.5wt%, Al 1.5wt%, Cr
2.0wt%, Cu 0.3wt%, surplus Fe.
2, will after above-mentioned alloy melting carry out On-line Control forging ratio and forging 350mm thickness or so, after cooled down again
650 degree of guarantors slow cool down room temperature after 8 hours,
3, above-mentioned offline rolled product is made into required product such as ball and liner plate using mechanical equipment cold working,
4, after the steel part of above-mentioned cold forming being heated to complete austenitizing heat preservation 2 hours；
5, above-mentioned steel part directly 380 degree are but as cold as with water quenching liquid cooling from austenitic state to bury cold 72 hours to room
Temperature；
6, after keeping the temperature 2 hours for 100 degree of above-mentioned reheating, Direct Air-Cooled is fully completed to room temperature；Obtaining organizational form is
Martensite and austenite alternating structure.
Product mechanical property after tested are as follows: hardness HRC50, ballistic work V-type 50J.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (4)
1. a kind of preparation method of Austria horse alternating erosion resistant steel, which is characterized in that including following operation:
1) following main alloy element: C 0.2-0.8wt%, Si 0.5-2.5wt%, Al 0.01-, is selected by mass percentage
2.0wt%wt%, Mn 1.6-3.6wt%, Cr 0.6-2.0wt%, Ni 0.1-2.0wt%, Cu 0.1-1.0wt%, Mo
0.01-0.5wt%, P 0-0.3wt%, S 0-0.03wt%, surplus Fe；It further include following one or more of assistant alloy members
Element: B 0-0.5wt%, W 0-1.0wt%, CO 0-0.5wt%, V 0-1.0wt%；
2), smelt and roll, forging, casting and forming: the alloy in step 1) is smelted, then using casting or forging or
Room temperature is cooled to after rolling mill practice molding；
3) it is heat-treated and cooling: step 2) shaped article being warming up to 850 ± 100 ° again, heat preservation 2 ± 1 hours arrive room temperature；Or again
650 ± 100 ° are heated to, slow cooling is to room temperature after heat preservation；
4), the product in step 3) is cooled fast to 500 by keeping the temperature 2 ± 1 hours after being heated to austenitic area again after heat preservation
After ± 100 degree, then change the type of cooling, slow cooling to room temperature, 500 degree or less slow coolings are to room temperature cooling velocity per hour less than 75
Degree, time optimal 1-3 days；It is fast after heat preservation or by the product in step 3) by keeping the temperature 2 ± 1 hours after being heated to austenitic area
Speed is cooled to 500 degree, then changes slow cool down mode, and incubation period temperature, isothermal time 2- in 400-100 degree region are reserved in centre
Arrive room temperature within 100 hours；
5), the product in step 4) is subjected to lonneal processing again, handles the time 2 ± 1 hours, completes entire technique.
2. a kind of preparation method of horse alternating erosion resistant steel difficult to understand according to claim 1, it is characterised in that: in step 4) by
Austenitic area to Bainite Region cooling, wherein fast cold medium is the water used or air cooling or air-cooled or quenching liquid or oily cold or wind
Cold or mist is cold；Slow cooling is cold using furnace or heap is cold or buries cold or burial pit or leer；Isothermal is cold using furnace or buries cold.
3. a kind of preparation method of horse alternating erosion resistant steel difficult to understand according to claim 1, it is characterised in that: final molding
Horse alternating corrosion resisting steel product difficult to understand includes wear-resisting etched plate or erosion resistant ball or erosion resistant pipe or erosion resistant steel part.
4. a kind of preparation method of horse alternating erosion resistant steel difficult to understand according to claim 1, it is characterised in that the low temperature
The Main Tissues that tempering obtains are one layer of austenite and one layer of martensite or one layer of austenite and one layer of bainite/martensite tissue
It is alternately arranged structure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286585A (en) * | 2020-03-19 | 2020-06-16 | 紫荆浆体管道工程股份公司 | Super bainite steel and preparation method thereof |
| CN114214495A (en) * | 2021-10-20 | 2022-03-22 | 中国科学院力学研究所 | Ultrahigh-strength medium manganese steel and preparation method thereof |
| CN114622131A (en) * | 2020-12-14 | 2022-06-14 | 紫荆浆体管道工程股份公司 | Anti-fracture and anti-fatigue lining plate of semi-autogenous mill and preparation method thereof |
| CN115011867A (en) * | 2022-04-19 | 2022-09-06 | 清华大学 | High-strength-toughness wear-resistant steel lining plate and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825774A (en) * | 2019-04-11 | 2019-05-31 | 紫荆浆体管道工程股份公司 | A kind of preparation method of Bei Maao multi-phase wear-resistant erosion steel |
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2019
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825774A (en) * | 2019-04-11 | 2019-05-31 | 紫荆浆体管道工程股份公司 | A kind of preparation method of Bei Maao multi-phase wear-resistant erosion steel |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286585A (en) * | 2020-03-19 | 2020-06-16 | 紫荆浆体管道工程股份公司 | Super bainite steel and preparation method thereof |
| CN114622131A (en) * | 2020-12-14 | 2022-06-14 | 紫荆浆体管道工程股份公司 | Anti-fracture and anti-fatigue lining plate of semi-autogenous mill and preparation method thereof |
| CN114214495A (en) * | 2021-10-20 | 2022-03-22 | 中国科学院力学研究所 | Ultrahigh-strength medium manganese steel and preparation method thereof |
| CN115011867A (en) * | 2022-04-19 | 2022-09-06 | 清华大学 | High-strength-toughness wear-resistant steel lining plate and preparation method thereof |
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