CN106868420A - One kind forging superhigh intensity low-alloy wear-resistant steel and preparation method thereof - Google Patents
One kind forging superhigh intensity low-alloy wear-resistant steel and preparation method thereof Download PDFInfo
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- CN106868420A CN106868420A CN201710206376.1A CN201710206376A CN106868420A CN 106868420 A CN106868420 A CN 106868420A CN 201710206376 A CN201710206376 A CN 201710206376A CN 106868420 A CN106868420 A CN 106868420A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
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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
-
- 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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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master alloys
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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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- 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
- 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
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
- E02F9/2808—Teeth
- E02F9/285—Teeth characterised by the material used
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/001—Austenite
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The present invention proposes a kind of forging superhigh intensity low-alloy wear-resistant steel, and the main chemical compositions and content of its material are following (wt.%):C：0.20‑0.40 Si：1.00‑1.55 Mn：0.70‑1.00 Cr：1.00‑1.40 Mo：0.05‑0.20 Ni：0.05‑0.10 Cu：0.05‑0.20 S：≤0.035 P：≤ 0.035 remaining be Fe.Beneficial effects of the present invention：The present invention can greatly improve the quenching degree and wearability of abrasion-resistant stee；Forging superhigh intensity low-alloy wear-resistant steel of the present invention has superhigh intensity, good toughness, hardness high, good wearability simultaneously, and its service life can be improved more than three times than common low-alloy wear-resistant steel；Present invention also offers a kind of forging preparation method of superhigh intensity low-alloy wear-resistant steel, it is ensured that technique is uncomplicated, easily-controllable, low production cost.
Description
Technical field
It is resistance to superhigh intensity low-alloy the present invention relates to metal material field, more particularly to a kind of forging for being suitable for bucket tooth
Mill steel and preparation method thereof.
Background technology
Bucket tooth be construction machinery industry excavator, load machine operation in wear and tear most serious part, be widely used in mine,
The industries such as metallurgy, water conservancy, electric power, building, machinery, directly with the Long Term Contact such as rock, mineral, sand, soil, due to operating mode bar
Part is severe, and in contacting material, both withstood shocks active force, and flecition power is born again, and bucket tooth tip is often subject to stronger
Impact and slid ing abrasion, the main failure mode of bucket tooth is to wear and tear and be broken, and bucket tooth surface is frayed to cause fracture, causes
Bucket tooth service life is short, changes frequent.Current bucket tooth is golden in violent steel one side steel alloy high frequently with potassium steel and low-alloy steel
Category Mn constituent contents are up to more than ten percent, are a kind of cast austenitic manganese steel (referred to as high violent steel), its wearability it is main compared with
Occur to be produced in the case that Surface Machining is hardened under impact loading high.And be not in mining clay, sand shock loading
In the case of very high, surface produces processing hardening substantially, on the contrary not cause the wearability of potassium steel from being not fully exerted,
Wearability is very poor under causing general impact loading, and the life-span is shorter.And low-alloy wear-resistant steel be construction machinery industry at present should
With the high-abrasive material of a very extensive class, with good combination property, and alloy content is low, and production prices are relatively low.Low conjunction
Golden abrasion-resistant stee mainly obtains martensite or geneva by adding the alloying element of a small amount of (≤5%), and Technology for Heating Processing
Body+bainite structure, so as to improve the hardness and wearability of steel alloy.This kind of steel is needed to have for bucket tooth low-alloy wear-resistant steel
There are intensity high, good toughness, and hardness high, the wearability and service life of raising bucket tooth that could be real, but
Low-alloy steel can change within a large range due to chemical composition, Technology for Heating Processing, thus its mechanical property performance fluctuation compared with
Greatly, it is impossible to while meeting the requirement of intensity high, good toughness and hardness high.
In common middle low carbon and low alloy wear-resistant cast steel be both at home and abroad at present ZG30CrMoSi, ZG30CrMoNi,
The series alloys such as ZG35CrMo, ZG35CrMoNi, due to adding Mo, Ni weight/mass percentage composition higher, are more expensive to manufacture.In Cr-
On the basis of Mn-Mo, the trace element for adding the crystal grain thinnings such as B, Ti, V, Nb, RE (rare earth element) is the more commonly used method, example
Chinese patent " a kind of preparation method of middle carbon multi-element low-alloy wear-resistant steel " such as Publication No. CN 201310067281.8 exists
On the basis of Cr-Mn-Si steel, quenching degree, wearability are improved by adding a certain amount of Mo, V, be additionally added B, Ti, Nb, Ce etc.
Lot of trace alloying element plays Grain refinement to summarize comprehensive mechanical property, and the invention addition element is more, except common conjunction
Outside golden melting, the Metamorphism treatment of trace element is substantially carried out, technique is relative complex, and is difficult to control to.
The Chinese patent of Publication No. CN201510099344.7 discloses a kind of " low-alloy of toughness more than 50J/cm2
Abrasion-resistant stee and production method ", needs to add Mo in the composition of the low conjunction abrasion-resistant stee of the patent of invention:0.30-0.50%, Ti:
0.25-0.35%, B:0.0 1-0.05%, more than the tensile strength 1500MPa of the low-alloy wear-resistant steel of preparation, good-toughness is high
In 50J/cm2, elongation percentage >=16%, hardness number >=450HV (>=45.3HRC).Although plasticity and toughness are good, tension is strong
Degree only has more than 1500MPa, and hardness only has more than 45.3HRC, and further raising is need for ultrahigh-strength wear-resistant steel.
Mo constituent contents are added in the other invention of a relatively high, in preparation technology in addition to the alloy melting of cast steel, it is necessary to by thick
Rolling and finishing rolling step, manufacturing process are complicated, and manufacturing cost is higher.
The Chinese patent of Publication No. CN201110276071.0, discloses a kind of " preparation side of middle low-alloy wear-resistant steel
Method ", its composition is C：0.41%-0.50%, Si：0.85%-0.95%, Mn：1.1%-1.4%, Cr：It is 1.5%-
2.3%,：Mo：0.31%-0.45%, Cu：1.25%-1.35%, Ce：0.30%-0.45%, B：0.001%-0.003%, P
≤ 0.04%, S≤0.04%, balance of Fe.C content is higher in the patent of invention, and phosphorus content is higher, and intensity hardness is higher, but
Plasticity, toughness can also be decreased, and abrasion-resistant stee is waited be easily broken off when in use, and the Mo of addition is higher, cause cost to increase, and Cu contains
Amount is very high, and during copper too high levels, the intensity and wearability of abrasion-resistant stee can be reduced on the contrary, Ce, B etc. is also added in addition thin
Change the alloying element of crystal grain.The hardness number of low-alloy wear-resistant steel is 52-56HRC, and notched bar impact strength is up to 35-75J/cm2, tension
Intensity is 1550-1750MPa.
To sum up, low-alloy wear-resistant steel common at present is more expensive to manufacture, and takes the means of addition trace element to improve wear-resisting
Property, quenching degree, but cause manufacturing process complicated and be difficult to control to, the mechanical property such as the plasticity of abrasion-resistant stee, toughness, intensity and wearability
Can not can simultaneously reach requirement.
The content of the invention
Therefore the present invention proposes a kind of can simultaneously meet mechanical property requirements and can reduce the forging of manufacturing cost again with surpassing
High strength low alloy wear resistance steel, solves the problems, such as existing low-alloy wear-resistant steel.In addition, another object of the present invention is to provide
It is a kind of to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel.
The technical proposal of the invention is realized in this way：Superhigh intensity low-alloy wear-resistant steel is used in one kind forging, its material
Main chemical compositions and content are following (wt.%):
Further, superhigh intensity low-alloy wear-resistant steel is used in forging of the present invention, the main chemical compositions of its material and
Content is following (wt.%):
Further, the forging of the present invention tensile strength sigma b ＞ 1770- of superhigh intensity low-alloy wear-resistant steel
1960MPa, elongation percentage A >=7-11%, quenching hardness >=52-54HRC.
The content of C of the present invention is 0.20-0.40wt.%, carbon (C)：It is most important solution strengthening element, to the hard of steel
Degree, toughness, wearability have important influence；Phosphorus content is higher, and intensity hardness is higher, but plasticity, toughness can also be decreased, resistance to
Mill steel is waited be easily broken off when in use；Phosphorus content is lower, and plasticity, toughness are higher, and its intensity, hardness are low to be decreased.In order to
Reach engineering machinery bucket tooth abrasion-resistant stee superhigh intensity has preferable plasticity again, considers, forging abrasion-resistant stee of the invention
C element weight/mass percentage composition be 0.20-0.40wt.%, further control in 0.25-0.35wt.%, belong to middle low carbon steel model
Farmland, had both taken into account intensity and wearability, it is also considered that impact flexibility.
The content of Si of the present invention is 1.00-1.55wt.%, silicon (Si)：It is one of common solid solution strengthened alloy element, because
For silicon is dissolved in after ferrite, with very strong solution strengthening effect, while significantly improving the intensity and hardness of steel, steel is improved
Elastic limit, yield limit and yield ratio, increase steel belt roof bolt stability, with the increase of silicone content, the precipitation quilt of carbide
Suppress or delay, it is easy to form bainite structure, when Si element superelevation certain values, the toughness of abrasion-resistant stee can drastically decline.Therefore
By silicon content control in 1.00-1.55wt.%, further control both ensure that intensity and hardness to the present invention in 1.20-1.40%
Do not reduce toughness again.
The content of Cr of the present invention is 1.00-1.40wt.%, chromium (Cr)：It is one of basic element of high-abrasive material, Ke Yigu
Molten reinforcing matrix, it is possible to play Grain refinement and improve quenching degree, wearability and the corrosion resistance of steel, chromium can make steel
Perlitic transformation and bainite transformation separate, multiple compounds (Fe, Cr) 3C can be formed with carbon, improve the same of hardness and intensity
When do not reduce impact toughness, with certain Cr elements are added in tempering resistivity steel higher, can significantly improve wear-resisting
The intensity and hardness of steel.Additionally, the interaction of the element of Cr, Mn, Si tri- proportioning, stabilization of austenite, through hardening to abrasion-resistant stee
Property, performance of hardening have obvious invigoration effect.Therefore the present invention controls in 1.00-1.40wt.% chrome content, further control
In 1.20-1.30wt.%.
The content of Mn of the present invention is 0.70-1.00wt.%, manganese (Mn)：It is one of alloy strengthening element, solid solution can be played
Invigoration effect, improves the quenching degree of alloy, while Mn elements are good deoxidier and desulfurizing agent, in can be used to carry out molten steel
Deoxidation and desulfurization process, when Mn constituent contents are in 0.70-1.00%, can significantly improve the intensity of abrasion-resistant stee, and can carry
Mn high impact flexibility at low temperature, therefore the present invention controls in 0.70-1.00wt.% manganese content, further control is in 0.80-
0.90wt.%.
The content of Mo of the present invention is 0.05-0.20wt.%, molybdenum (Mo)：Primarily serve and improve the high-temperature stability of steel, steel
Hardness, the intensity that steel can be improved.Molybdenum and ferrite and austenite solid solution simultaneously form carbide, play Grain refinement, and molybdenum is also
Segregation of the foreign atoms such as P, S to grain boundaries can be suppressed, therefore temper brittleness can be reduced；Mn elements are matched somebody with somebody with appropriate Mo
Conjunction can improve the quenching degree of steel, and the content of molybdenum is too low, and DeGrain, content is too high, then relatively costly, considers,
The present invention will contain the control of molybdenum amount in 0.05-0.20wt.%, and further control is in 0.08-0.15%.
The content of Ni of the present invention is 0.05-0.10wt.%, nickel (Ni)：It is reinforced ferrite alloying element, casting can be improved
The intensity and toughness of steel, especially low-temperature impact toughness, improve steel to the resistance of fatigue and reduce the sensitiveness to breach, drop
The tough brittle transition temperature of low steel, improves yield tensile ratio, improves the machining property and solderability of steel.But nickel element belongs to dilute
Scarce strategic resource, price is costly.Therefore be balance mechanical property and cost, nickel element control of the present invention is in 0.05-
0.10wt.%, further control is in 0.06-0.09wt.%.
The content of Cu of the present invention is 0.05-0.20wt.%, copper (Cu)：It is main in steel to exist in solid solution state form, play
Solution strengthening effect, it is possible to improve molten steel mobility at high temperature, the raising antifriction alloy that copper can also be to a certain extent
The quenching degree of steel.But during copper too high levels, the intensity and wearability of abrasion-resistant stee can be reduced on the contrary.Therefore it is wear-resisting in order to balance
The quenching degree of steel, intensity and wearability, by copper control in 0.05-0.20wt.%, further control is in 0.10- for the present invention
0.15wt.%.
The content of S of the present invention is≤0.035wt.%, sulphur (S)：The harmful element in steel, be in steel-making by ore and
The impurity that fuel is taken in steel, sulphur can only be dissolved in the molten steel of high temperature, can hardly be dissolved in solid iron, with FeS field trashes
Form be present in grain boundaries in solid steel, easily cause cracking during hot-working, referred to as hot-short, its content should be controlled strictly
Make the level≤0.035%.
The content of P of the present invention is≤0.035wt.%, phosphorus (P)：It is also the harmful element in steel, rushing for steel can be drastically reduced
Toughness is hit, especially low-temperature flexibility, phosphorus can be gathered in grain boundaries, form serious segregation, cause temper brittleness, therefore, it contains
Amount should be strict controlled in≤0.035% level.
To sum up, the present invention is that (its composition is C in ZG30CrMnSi：0.28-0.38%, Si：0.5-0.75%, Mn：0.9-
1.20%, Cr：On the basis of the cast steel of 0.5-0.80%, S, P≤0.045%), containing for Cr and Si alloying elements is further improved
Amount so that Cr contents are improved to 1.20-1.30%, and Si contents are improved to 1.20-1.40%, its advantage can be greatly to improve
The quenching degree and wearability of abrasion-resistant stee.The present invention focuses on tri- kinds of rational proportions of alloying element of Cr, Si, Mn so that Cr/Si=
0.90~1.4, Cr/Mn=1.4~2.0, stabilization of austenite, quenching degree, performance of hardening to abrasion-resistant stee have obvious strong
Change is acted on.A small amount of Mo, Cu, Ni alloying element is added simultaneously, and purpose is mainly quenching degree, toughness, the stabilization for improving abrasion-resistant stee
Property.
The invention allows for a kind of forging preparation method of superhigh intensity low-alloy wear-resistant steel, comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, at 1600-1620 DEG C
Smelting temperature, 1580-1600 DEG C of tapping temperature under obtain molten steel, the main chemical compositions and content of the molten steel are as follows
(wt.%):
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.5-0.6MPa, and the operating time is 10-15 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1560-1580 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1180-1220 DEG C, forging temperature
For 1130-1180 DEG C, whole 850 DEG C of forging temperature ＞, forging pressure obtain metal to be forged under the process conditions of 400-1000kN
Forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 890-910 DEG C, and soaking time is 2-3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：200-250 DEG C of temperature, soaking time 1-2h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Further, it is 2-3h when the raw material heat time in the melting step, molten steel temperature reaches 1600-1620 DEG C
When, addition accounts for the slag former of raw material gross mass 1%, when tapping temperature is at 1580-1600 DEG C to stove in add and account for the total matter of raw material
The aluminium wire of amount 0.1% carries out deoxidation step.
Further, in the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel
Piece, copper sheet, the pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are 10-30mm, and the nickel sheet is wide
Degree, copper sheet width≤30mm, the nickel sheet length, copper sheet length≤50mm.
Further, after adding the slag former for accounting for raw material gross mass 1%, operation of skimming is carried out when raw material is completely melt.
Further, the slag former is one or more in CaO, Si-Ca alloy, SiC powder.
Further, the melting step is：Steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or Medium frequency induction first
Heat up fusing in smelting furnace, when melting sources half in stove, to being sequentially added in basic electric arc furnace or medium frequency induction melting furnace
Ferrochrome, ferromanganese, ferrosilicon.
Further, operation and the deoxidation step operating time ＜ 20min of skimming.
The present invention does not have the alloying element by adding any micro crystal grain thinning, but by warm forging technique high
So that low-alloy wear-resistant steel microstructure is finer and close, foundry alloy matrix grain becomes tiny by forging, it is ensured that technique is not
It is complicated, easily-controllable, low production cost, sulfide, phosphide, oxide in can smashing steel under big forging force effect in addition
Step on non-metallic inclusion or reduce the content of field trash, one is obtained eventually through quenching and low-temperature tempering heat treatment technique
Superhigh intensity low-alloy wear-resistant steel is planted, the final metallographic structure of the present invention is：The granular carbide of tempered martensite+tiny+a small amount of
Retained austenite, the mechanical property such as its plasticity, toughness, intensity and wearability can simultaneously reach requirement.
By above disclosure, beneficial effects of the present invention are：The present invention is that (its composition is C in ZG30CrMnSi：
0.28-0.38%, Si：0.5-0.75%, Mn：0.9-1.20%, Cr：The basis of the cast steel of 0.5-0.80%, S, P≤0.045%)
On, further improve Cr and Si alloying elements content so that Cr contents are improved to 1.20-1.30%, Si contents improve to
1.20-1.40%, its advantage can be greatly to improve the quenching degree and wearability of abrasion-resistant stee；The present invention focuses on Cr, Si, Mn tri-
Plant the rational proportion of alloying element so that Cr/Si=0.90~1.4, Cr/Mn=1.4~2.0, the austenite to abrasion-resistant stee is steady
Qualitative, quenching degree, performance of hardening have obvious invigoration effect, while a small amount of Mo, Cu, Ni alloying element of addition, purpose master
If improving quenching degree, toughness, the stability of abrasion-resistant stee；Forging superhigh intensity low-alloy wear-resistant steel of the present invention has super simultaneously
High intensity (tensile strength sigma b be 1770-1960MPa), (elongation after fracture A is 7-11%, room temperature impact toughness to good toughness
aKVBe 29-31.1J), hardness (quenching hardness is 52-54HRC) high, the good wearability (hardness of wearability and steel alloy
Value is directly proportional, and usual hardness is higher, and wearability is higher), its service life can improve three times than common low-alloy wear-resistant steel
More than, therefore the suitable preparation engineering cable operated excavator of the present invention, loading machine are with applying mechanically wear-resisting consumable accessory --- bucket tooth；The present invention is also carried
For a kind of preparation method of forging superhigh intensity low-alloy wear-resistant steel, the present invention is not by adding any micro refinement
The alloying element of crystal grain, but cause that low-alloy wear-resistant steel microstructure is finer and close, foundry alloy by warm forging technique high
Matrix grain becomes tiny by forging, it is ensured that technique is uncomplicated, easily-controllable, low production cost, in addition in big forging masterpiece
Non-metallic inclusion is stepped on the lower sulfide that can be smashed in steel, phosphide, oxide or reduce the content of field trash, finally
A kind of superhigh intensity low-alloy wear-resistant steel is obtained by quenching and low-temperature tempering heat treatment technique, superhigh intensity of the present invention is low
The final metallographic structure of alloy abrasion resistant steel is：The retained austenite of the granular carbide of tempered martensite+tiny+a small amount of, its plasticity,
The mechanical properties such as toughness, intensity and wearability can simultaneously reach requirement.
Brief description of the drawings
Fig. 1 is forged superhigh intensity low-alloy wear-resistant steel of the present invention, quenching and the gold after lonneal under 500 times of amplification
Phase microscopic structure.
Fig. 2 is the metallographic microstructure of the corresponding superhigh intensity low-alloy wear-resistant steel of the embodiment of the present invention eight, display tissue
In be dispersed with tiny granular carbide, a small amount of retained austenite in typical tiny tempered martensite matrix.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one
Superhigh intensity low-alloy wear-resistant steel is used in one kind forging,：The main chemical compositions and content of its material are as follows
(wt.%):
Embodiment two
Superhigh intensity low-alloy wear-resistant steel is used in one kind forging,：The main chemical compositions and content of its material are as follows
(wt.%):
Embodiment three
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Example IV
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment five
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment six
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment seven
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment eight
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment nine
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment ten
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
Embodiment 11
One kind forging superhigh intensity low-alloy wear-resistant steel, the main chemical compositions and content of its material are following (wt.%):
The forging of the embodiment one to the embodiment 11 is carried out into mechanicalness with superhigh intensity low-alloy wear-resistant steel
The mechanical analysis of energy, obtains result as shown in table 1：
Table 1
According to table 1, the forging of the embodiment of the present invention one to embodiment 11 is same with superhigh intensity low-alloy wear-resistant steel
When there is superhigh intensity (tensile strength sigma b be 1770-1960MPa), (elongation after fracture A is 7-11%, room temperature to good toughness
Impact flexibility aKVBe 29-31.1J), hardness (quenching hardness is 52-54HRC) high, good wearability (wearability and alloy
The hardness number of steel is directly proportional, and usual hardness is higher, and wearability is higher), its service life can be with than common low-alloy wear-resistant steel
Improve more than three times.Therefore the suitable preparation engineering cable operated excavator of the present invention, loading machine are with applying mechanically wear-resisting consumable accessory --- bucket tooth.
Embodiment 12
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment one,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1600 DEG C melt
Molten steel is obtained under refining temperature, 1580 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.5MPa, and the operating time is 10 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1560 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1180 DEG C, forge temperature be
1130 DEG C, the forging in the case where 860 DEG C, forging pressure are for the process conditions of 400kN of whole forging temperature obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 890 DEG C, and soaking time is 2h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：200 DEG C of temperature, soaking time 1h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 13
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment two,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1620 DEG C melt
Molten steel is obtained under refining temperature, 1600 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
It is 3h when the raw material heat time in the melting step, when molten steel temperature reaches 1620 DEG C, addition accounts for the total matter of raw material
The slag former of amount 1%, when tapping temperature is at 1600 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation work
Sequence.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.6MPa, and the operating time is 15 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1580 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1220 DEG C, forge temperature be
1180 DEG C, the forging in the case where 1030 DEG C, forging pressure are for the process conditions of 1000kN of whole forging temperature obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 910 DEG C, and soaking time is 3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：250 DEG C of temperature, soaking time 2h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 14
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment three,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1610 DEG C melt
Molten steel is obtained under refining temperature, 1590 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 10mm, the nickel sheet width, copper sheet width are
20mm, the nickel sheet length, copper sheet length are 50mm, are 2.5h when the raw material heat time, when molten steel temperature reaches 1610 DEG C, plus
Enter to account for the slag former of raw material gross mass 1%, when tapping temperature is at 1590 DEG C to stove in add and account for the aluminium of raw material gross mass 0.1%
Silk carries out deoxidation step.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.55MPa, and the operating time is 13 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1570 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1200 DEG C, forge temperature be
1150 DEG C, whole forging temperature be 1000 DEG C, forging pressure under the process conditions of 700kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 900 DEG C, and soaking time is 2.5h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：225 DEG C of temperature, soaking time 1.5h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 15
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in example IV,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1600 DEG C melt
Molten steel is obtained under refining temperature, 1590 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 30mm, the nickel sheet width, copper sheet width
20mm, the nickel sheet length, copper sheet length 50mm, are 2.2h when the raw material heat time, when molten steel temperature reaches 1611 DEG C, are added
The slag former of raw material gross mass 1% is accounted for, operation of skimming is carried out when raw material is completely melt, when tapping temperature is at 1588 DEG C to stove
The aluminium wire that middle addition accounts for raw material gross mass 0.1% carries out deoxidation step.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.52MPa, and the operating time is 13 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1566 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1215 DEG C, forge temperature be
1155 DEG C, whole 920 DEG C of forging temperature, forging pressure under the process conditions of 800kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 905 DEG C, and soaking time is 2.8h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：223 DEG C of temperature, soaking time 1.1h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 16
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment five,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1616 DEG C melt
Molten steel is obtained under refining temperature, 1587 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 20mm, the nickel sheet width, copper sheet width
20mm, the nickel sheet length, copper sheet length 30mm, are 2h when the raw material heat time, and when molten steel temperature reaches 1610 DEG C, addition is accounted for
The slag former of raw material gross mass 1%, the slag former is CaO, and operation of skimming is carried out when raw material is completely melt, works as tapping temperature
At 1590 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.56MPa, and the operating time is 13 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1577 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1211 DEG C, forge temperature be
1160 DEG C, whole 1111 DEG C of forging temperature, forging pressure under the process conditions of 650kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 909 DEG C, and soaking time is 2.6h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：235 DEG C of temperature, soaking time 1.5h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 17
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment six,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1615 DEG C melt
Molten steel is obtained under refining temperature, 1590 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 10mm, the nickel sheet width, copper sheet width
30mm, the nickel sheet length, copper sheet length 45mm, add basic electric arc furnace or Medium frequency induction by steel scrap, the pig iron and molybdenum-iron first
Heat up fusing in smelting furnace, when melting sources half in stove, to being sequentially added in basic electric arc furnace or medium frequency induction melting furnace
Ferrochrome, ferromanganese, ferrosilicon, are 2.5h when the raw material heat time, and when molten steel temperature reaches 1610 DEG C, addition accounts for raw material gross mass 1%
Slag former, the slag former be Si-Ca alloys, operation of skimming is carried out when raw material is completely melt, when tapping temperature is 1590
DEG C when account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step to being added in stove.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.55MPa, and the operating time is 14 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1580 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1200 DEG C, forge temperature be
1155 DEG C, whole 855 DEG C of forging temperature, forging pressure under the process conditions of 580kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 895 DEG C, and soaking time is 3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：250 DEG C of temperature, soaking time 2h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 18
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment seven,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1620 DEG C melt
Molten steel is obtained under refining temperature, 1580 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 25mm, the nickel sheet width, copper sheet width
28mm, the nickel sheet length, copper sheet length 45mm,
Intensification is melted during steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or medium frequency induction melting furnace first, when in stove
During melting sources half, to sequentially adding ferrochrome, ferromanganese, ferrosilicon in basic electric arc furnace or medium frequency induction melting furnace, when raw material plus
The hot time is 2h, and when molten steel temperature reaches 1610 DEG C, addition accounts for the slag former of raw material gross mass 1%, and the slag former is SiC powder
End, operation of skimming is carried out when raw material is completely melt, a little molten steel is taken in basic electric arc furnace or medium frequency induction melting furnace and is treated certainly
So carry out chemical composition chemical examination after cooling again suitably to adjust molten steel component according to result of laboratory test, to obtain primary chemical
The molten steel of composition and content following (wt.%):
When tapping temperature is at 1600 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step, will
Deoxidier is pressed onto depths in stove, and metal bath surface is covered tightly to separate outside air with slag former, while deoxidation fluxing effect is played, institute
It is one or more in aluminium wire, Si-Ca alloys, SiC to state deoxidier, described to skim operation and the deoxidation step operating time is
18min。
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.6MPa, and the operating time is 12 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1580 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1190 DEG C, forge temperature be
1150 DEG C, whole 1000 DEG C of forging temperature, forging pressure under the process conditions of 1000kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 900 DEG C, and soaking time is 3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：200 DEG C of temperature, soaking time 1h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 19
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment eight,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1600 DEG C melt
Molten steel is obtained under refining temperature, 1585 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 30mm, the nickel sheet width, copper sheet width
30mm, the nickel sheet length, copper sheet length 40mm,
Intensification is melted during steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or medium frequency induction melting furnace first, when in stove
During melting sources half, to sequentially adding ferrochrome, ferromanganese, ferrosilicon in basic electric arc furnace or medium frequency induction melting furnace, when raw material plus
The hot time is 2.5h, and when molten steel temperature reaches 1600 DEG C, addition accounts for the slag former of raw material gross mass 1%, and the slag former is
CaO, Si-Ca alloy, operation of skimming is carried out when raw material is completely melt, is taken in basic electric arc furnace or medium frequency induction melting furnace few
Perhaps molten steel after carried out after natural cooling chemical composition chemical examination molten steel component is suitably adjusted again according to result of laboratory test, with
To main chemical compositions and the molten steel of content following (wt.%):
When tapping temperature is at 1580 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step, will
Deoxidier is pressed onto depths in stove, and metal bath surface is covered tightly to separate outside air with slag former, while deoxidation fluxing effect is played, institute
Deoxidier is stated for aluminium wire, it is described to skim operation and the deoxidation step operating time is 15min.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.55MPa, and the operating time is 14 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1560 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1220 DEG C, forge temperature be
1150 DEG C, whole 900 DEG C of forging temperature, forging pressure under the process conditions of 700kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 890 DEG C, and soaking time is 2h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：250 DEG C of temperature, soaking time 1.2h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 20
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment nine,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1610 DEG C melt
Molten steel is obtained under refining temperature, 1600 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 15mm, the nickel sheet width, copper sheet width
20mm, the nickel sheet length, copper sheet length 30mm,
Intensification is melted during steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or medium frequency induction melting furnace first, when in stove
During melting sources half, to sequentially adding ferrochrome, ferromanganese, ferrosilicon in basic electric arc furnace or medium frequency induction melting furnace, when raw material plus
The hot time is 3h, and when molten steel temperature reaches 1600 DEG C, addition accounts for the slag former of raw material gross mass 1%, and the slag former is Si-Ca
Alloy, SiC powder, operation of skimming is carried out when raw material is completely melt, is taken in basic electric arc furnace or medium frequency induction melting furnace few
Perhaps molten steel after carried out after natural cooling chemical composition chemical examination molten steel component is suitably adjusted again according to result of laboratory test, with
To main chemical compositions and the molten steel of content following (wt.%):
When tapping temperature is at 1595 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step, will
Deoxidier is pressed onto depths in stove, and metal bath surface is covered tightly to separate outside air with slag former, while deoxidation fluxing effect is played, institute
Deoxidier is stated for aluminium wire, it is described to skim operation and the deoxidation step operating time is 18min.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.5MPa, and the operating time is 12 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1580 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1180 DEG C, forge temperature be
1135 DEG C, whole 900 DEG C of forging temperature, forging pressure under the process conditions of 600kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 900 DEG C, and soaking time is 3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：210 DEG C of temperature, soaking time 2h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 21
The present embodiment is directed to a kind of preparation method of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment ten,
Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1620 DEG C melt
Molten steel is obtained under refining temperature, 1580 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 19mm, the nickel sheet width, copper sheet width are
30mm, the nickel sheet length, copper sheet length are 45mm,
Intensification is melted during steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or medium frequency induction melting furnace first, when in stove
During melting sources half, to sequentially adding ferrochrome, ferromanganese, ferrosilicon in basic electric arc furnace or medium frequency induction melting furnace, when raw material plus
The hot time is 2h, and when molten steel temperature reaches 1610 DEG C, addition accounts for the slag former of raw material gross mass 1%, the slag former be CaO,
Si-Ca alloys, SiC powder, operation of skimming is carried out when raw material is completely melt, in basic electric arc furnace or medium frequency induction melting furnace
Take a little molten steel after carried out after natural cooling chemical composition chemical examination molten steel component is suitably adjusted again according to result of laboratory test,
To obtain the molten steel of main chemical compositions and content following (wt.%):
When tapping temperature is at 1580 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step, will
Deoxidier is pressed onto depths in stove, and metal bath surface is covered tightly to separate outside air with slag former, while deoxidation fluxing effect is played, institute
Deoxidier is stated for aluminium wire, it is described to skim operation and the deoxidation step operating time is 10min.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.56MPa, and the operating time is 10 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1560 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1180 DEG C, forge temperature be
1145 DEG C, whole 880 DEG C of forging temperature, forging pressure under the process conditions of 550kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 900 DEG C, and soaking time is 3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：240 DEG C of temperature, soaking time 1h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Embodiment 22
The present embodiment is directed to a kind of preparation side of the forging superhigh intensity low-alloy wear-resistant steel described in embodiment 11
Method, comprises the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1620 DEG C melt
Molten steel is obtained under refining temperature, 1580 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are following (wt.%):
In the melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, institute
Pig iron granularity, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity are stated for 20mm, the nickel sheet width, copper sheet width
30mm, the nickel sheet length, copper sheet length 40mm,
Intensification is melted during steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or medium frequency induction melting furnace first, when in stove
During melting sources half, to sequentially adding ferrochrome, ferromanganese, ferrosilicon in basic electric arc furnace or medium frequency induction melting furnace, when raw material plus
The hot time is 3h, and when molten steel temperature reaches 1600 DEG C, addition accounts for the slag former of raw material gross mass 1%, and the slag former is CaO,
Operation of skimming is carried out when raw material is completely melt, a little molten steel is taken in basic electric arc furnace or medium frequency induction melting furnace and is treated that nature is cold
But carry out chemical composition chemical examination afterwards again suitably to adjust molten steel component according to result of laboratory test, to obtain main chemical compositions
And the molten steel of content following (wt.%):
When tapping temperature is at 1580 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and carry out deoxidation step, will
Deoxidier is pressed onto depths in stove, and metal bath surface is covered tightly to separate outside air with slag former, while deoxidation fluxing effect is played, institute
Deoxidier is stated for aluminium wire, it is described to skim operation and the deoxidation step operating time is 16min.
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, at the Argon
Reason operating pressure is 0.6MPa, and the operating time is 15 minutes；
3) moulding by casting：Casting treatment is carried out to completing the molten steel after external refining step using La Mo or evaporative pattern
Casting steel billet is obtained, pouring temperature is 1565 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1195 DEG C, forge temperature be
1160 DEG C, whole 910 DEG C of forging temperature, forging pressure under the process conditions of 620kN forging obtain metal forging stock；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, the process conditions of the Quenching Treatment
For：Austenitizing heating-up temperature is 900 DEG C, and soaking time is 3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the technique of the lonneal treatment
Condition is：220 DEG C of temperature, soaking time 1h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (10)
1. superhigh intensity low-alloy wear-resistant steel is used in a kind of forging, it is characterised in that：The main chemical compositions and content of its material are such as
Under (wt.%):
2. superhigh intensity low-alloy wear-resistant steel is used in a kind of forging as claimed in claim 1, it is characterised in that：Its material it is main
Chemical composition and content are following (wt.%):
3. superhigh intensity low-alloy wear-resistant steel is used in a kind of forging as claimed in claim 1, it is characterised in that：The forging uses super
The tensile strength sigma b of high strength low alloy wear resistance steel is that 1770-1960MPa, elongation percentage A are 7-11%, and quenching hardness is 52-
54HRC。
4. a kind of preparation method of superhigh intensity low-alloy wear-resistant steel of the forging as described in claim 1-3 is any, its feature
It is：Comprise the following steps：
1) melting：Heating melting is carried out to raw material using basic electric arc furnace or medium frequency induction melting furnace, in 1600-1620 DEG C melt
Molten steel is obtained under refining temperature, 1580-1600 DEG C of tapping temperature, the main chemical compositions and content of the molten steel are as follows
(wt.%):
2) stove is outer concise：The molten steel that will be obtained in melting step is delivered to and Argon treatment is carried out in ladle, the Argon treatment behaviour
Make pressure for 0.5-0.6MPa, the operating time is 10-15 minutes；
3) moulding by casting：Casting treatment is carried out using La Mo or evaporative pattern to the molten steel after completion external refining step to obtain
Casting steel billet, pouring temperature is 1560-1580 DEG C；
4) forge：The casting steel billet that will be obtained in moulding by casting step in heating-up temperature be 1180-1220 DEG C, forge temperature be
1130-1180 DEG C, whole 850 DEG C of forging temperature ＞, forging pressure under the process conditions of 400-1000kN forging obtain metal forging
Base；
5) quench：The metal forging stock obtained in step will be forged carries out Quenching Treatment, and the process conditions of the Quenching Treatment are：It is difficult to understand
Family name's body heating-up temperature is 890-910 DEG C, and soaking time is 2-3h, and hardening media is oil quenching；
6) lonneal：Metal forging stock after quenching is carried out into lonneal treatment, the process conditions of the lonneal treatment
For：200-250 DEG C of temperature, soaking time 1-2h, air cooling obtains abrasion-resistant stee finished product after coming out of the stove.
It is 5. a kind of as claimed in claim 4 to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel, it is characterised in that：Institute
State in melting step, be 2-3h when the raw material heat time, when molten steel temperature reaches 1600-1620 DEG C, addition accounts for raw material gross mass
1% slag former, when tapping temperature is at 1580-1600 DEG C to stove in add and account for the aluminium wire of raw material gross mass 0.1% and taken off
Oxygen operation.
It is 6. a kind of as claimed in claim 4 to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel, it is characterised in that：Institute
State in melting step, the raw material includes steel scrap, the pig iron, ferrochrome, molybdenum-iron, ferromanganese, ferrosilicon, nickel sheet, copper sheet, the pig iron grain
Degree, ferrochrome granularity, molybdenum-iron granularity, ferromanganese granularity, ferrosilicon granularity be 10-30mm, the nickel sheet width, copper sheet width≤30mm,
The nickel sheet length, copper sheet length≤50mm.
It is 7. a kind of as claimed in claim 5 to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel, it is characterised in that：Plus
After entering to account for the slag former of raw material gross mass 1%, operation of skimming is carried out when raw material is completely melt.
It is 8. a kind of as claimed in claim 7 to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel, it is characterised in that：Institute
It is one or more in CaO, Si-Ca alloy, SiC powder to state slag former.
It is 9. a kind of as claimed in claim 6 to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel, it is characterised in that：Institute
Stating melting step is：Intensification is melted during steel scrap, the pig iron and molybdenum-iron are added into basic electric arc furnace or medium frequency induction melting furnace first, when
In stove during melting sources half, to sequentially adding ferrochrome, ferromanganese, ferrosilicon in basic electric arc furnace or medium frequency induction melting furnace.
It is 10. a kind of as claimed in claim 7 to forge with the preparation method of superhigh intensity low-alloy wear-resistant steel, it is characterised in that：
Operation and the deoxidation step operating time ＜ 20min of skimming.
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| CN108048740A (en) * | 2017-12-04 | 2018-05-18 | 成都六惠科技有限公司 | A kind of Hi-Stren steel and its preparation process |
| CN108048744A (en) * | 2017-12-13 | 2018-05-18 | 梅州市梅县区雄辉实业有限公司 | A kind of high-tenacity wear-resistant steel and preparation method thereof |
| CN111850380A (en) * | 2020-07-29 | 2020-10-30 | 南平市建阳区湛卢精密制造有限公司 | Low-temperature carbon steel valve casting material and manufacturing process thereof |
| CN112941404A (en) * | 2021-01-18 | 2021-06-11 | 江阴兴澄特种钢铁有限公司 | High-strength high-toughness low-carbon gear steel and preparation method thereof |
| CN113462856A (en) * | 2021-07-02 | 2021-10-01 | 太原理工大学 | Heat treatment method for improving toughness of steel casting of middle trough ledge of scraper conveyor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048740A (en) * | 2017-12-04 | 2018-05-18 | 成都六惠科技有限公司 | A kind of Hi-Stren steel and its preparation process |
| CN108048744A (en) * | 2017-12-13 | 2018-05-18 | 梅州市梅县区雄辉实业有限公司 | A kind of high-tenacity wear-resistant steel and preparation method thereof |
| CN111850380A (en) * | 2020-07-29 | 2020-10-30 | 南平市建阳区湛卢精密制造有限公司 | Low-temperature carbon steel valve casting material and manufacturing process thereof |
| CN112941404A (en) * | 2021-01-18 | 2021-06-11 | 江阴兴澄特种钢铁有限公司 | High-strength high-toughness low-carbon gear steel and preparation method thereof |
| CN112941404B (en) * | 2021-01-18 | 2022-07-15 | 江阴兴澄特种钢铁有限公司 | High-strength high-toughness low-carbon gear steel and preparation method thereof |
| CN113462856A (en) * | 2021-07-02 | 2021-10-01 | 太原理工大学 | Heat treatment method for improving toughness of steel casting of middle trough ledge of scraper conveyor |
| CN114032438A (en) * | 2021-11-15 | 2022-02-11 | 衢州东方特钢有限公司 | Preparation method of low-alloy wear-resistant steel |
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Application publication date: 20170620 |