CN108220816A - A kind of low chromium shock resistance high-temperature antiwear alloy steel and preparation method thereof - Google Patents
A kind of low chromium shock resistance high-temperature antiwear alloy steel and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of low chromium shock resistance high-temperature antiwear alloy steel and preparation method thereof, includes the chemical element component of following weight percent：Carbon 0.10 0.50%, silicon 0.4 2.2%, manganese 0.5 1.5%, phosphorus ＜ 0.04%, sulphur ＜ 0.04%, chromium 0.5 3.5%, nickel 0.2 2.2%, molybdenum 0.1 0.7%, boron 0 0.2%, aluminium 0.1 0.5%, cerium 0.2 1.2%, tin 0.02 0.20%, vanadium 0 0.8%, tungsten 0.1 1.5%, copper 0.05 0.4%, tantalum 0.005 0.020%, cobalt 0.05 0.20%, pick 0.05 0.25%, magnesium 0.01 0.04%, calcium 0.003 0.015%, titanium 0 0.08%, niobium 0 0.15%, surplus is iron.By steel alloy made from specific technique, it can either ensure high tenacity and shock resistance, and wearability and hardness can be improved.
Description
Technical field
The present invention relates to wear-resistant metal material technical fields, and in particular to a kind of low chromium shock resistance high-temperature antiwear alloy steel and
Preparation method.
Background technology
Steel alloy is that the iron carbon that suitable one or more alloying elements are added on the basis of ordinary carbon steel and are formed closes
Gold.According to the difference of addition element, and appropriate processing technology is taken, high intensity, high tenacity, wear-resisting, corrosion-resistant, resistance to can be obtained
The properties such as low temperature, high temperature resistant, nonmagnetic.According to the number of alloying element content in steel, and low-alloy steel can be divided into, middle conjunction
Jin Gang and high-alloy steel.The main alloy element of steel alloy have silicon, manganese, chromium, nickel, molybdenum, tungsten, vanadium, titanium, niobium, zirconium, cobalt, aluminium, copper,
Boron, rare earth etc..
Chinese patent CN1335417 discloses a kind of high-temperature antiwear alloy steel, it is characterised in that：Using following components and again
The raw material for measuring percentage composition passes through made from melting and other technological processes production：The steel scrap of 77.5-79%, 18.3-207%'s
High carbon ferro-chrome, the molybdenum-iron of 0.67-1.0%, the vanadium iron of 0.33-0.5%, suitable silicon, manganese deoxidier, the titanium of 0.05-0.1%
Iron, the zirconium of 0.02-0.05%, the aluminium of 0.6-1.2% and the rare earth element of 0.12-0.5%, steel alloy obtained in this way are carbon containing
1.45-1.70%, 11.0-12.5% containing chromium, 0.4-0.6% containing molybdenum, 0.15-0.30% containing vanadium, titaniferous 0.02-0.05% contain
Zirconium 0.02-0.05%, 0.6-1.2% containing aluminium, 0.05-0.15% containing rare earth element.High-temperature wearable disclosed in the patent document closes
Jin Gang uses the proportioning of increase carbon and high alloy element, although improving certain wear-resisting property, considerably increases conjunction
Golden cost, and the alloy Steel Properties produced, close to iron, brittleness is larger, and toughness is poor, and the unsuitable country is civilian to use and promote.
Chinese patent CN105385939A discloses a kind of manufacturing method of high-intensity and high-tenacity steel alloy, and feature exists
In including being prepared by the chemical composition of following weight percent：Carbon 0.3-0.58%, silicon 0.25-1.38%, manganese 0.55-
1.55%th, phosphorus≤0.025%, sulphur 0.02-0.025%, chromium 0.09-1.32%, nickel 0.28-0.62%, molybdenum 0.02-0.035%,
Titanium 0.18-0.20%, vanadium 0.2-0.5%, tungsten 0.4-0.9%, niobium 0.3-0.6%, cobalt 0.11-0.15%, copper 0.2-0.8%,
Aluminium≤0.2%, boron≤0.15% and nitrogen≤0.3%.The manufacturing method of high-intensity and high-tenacity steel alloy disclosed in the patent document,
It is produced with medium carbon steel, although hardness is higher, toughness is poor, and the alloy steel brittleness being prepared is larger, for beating cobblestone, closes
Jin Gang is easily damaged.
Invention content
In view of this, the application provides a kind of at low cost, and toughness is high, and wearability is high, low chromium anti-impact with high hardness
Hit high-temperature antiwear alloy steel and preparation method thereof.
For solution more than technical problem, technical solution provided by the invention is a kind of low chromium shock resistance high temperature wear resistant alloy
Steel, which is characterized in that include the chemical element component of following weight percent：Carbon 0.10-0.50%, silicon 0.4-2.2%, manganese
0.5-1.5%, phosphorus ＜ 0.04%, sulphur ＜ 0.04%, chromium 0.5-3.5%, nickel 0.2-2.2%, molybdenum 0.1-0.7%, boron 0-
0.2%, aluminium 0.1-0.5%, cerium 0.2-1.2%, tin 0.02-0.20%, vanadium 0-0.8%, tungsten 0.1-1.5%, copper 0.05-
0.4%, tantalum 0.005-0.020%, cobalt 0.05-0.20%, pick 0.05-0.25%, magnesium 0.01-0.04%, calcium 0.003-
0.015%, titanium 0-0.08%, niobium 0-0.15%, surplus are iron.
Preferably, the low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：
Carbon 0.15-0.40%, silicon 0.6-2.0%, manganese 0.8-1.3%, phosphorus ＜ 0.04%, sulphur ＜ 0.04%, chromium 1-3.5%, nickel 0.3-
2.0%, molybdenum 0.1-0.5%, boron 0-0.1%, aluminium 0.1-0.3%, cerium 0.3-1.0%, tin 0.02-0.15%, vanadium 0-0.5%,
Tungsten 0.1-1%, copper 0.05-0.3%, tantalum 0.005-0.015%, cobalt 0.05-0.15%, pick 0.05-0.2%, magnesium 0.01-
0.03%, calcium 0.003-0.01%, titanium 0-0.08%, niobium 0-0.15%, surplus are iron.
Preferably, wherein the summation of the weight percent of p and s is less than 0.04%.
Present invention also provides a kind of preparation methods of low chromium shock resistance high-temperature antiwear alloy steel, include the following steps：
(1) choose scrap iron, steel scrap, cerium mischmetal and containing silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper, tantalum, cobalt,
Pick, magnesium, calcium, niobium, titanium alloy；
(2) dispensing in step (1) is put into intermediate frequency furnace, leads to low current preheating to intermediate frequency furnace, full load is sent after preheating
Electricity, until dispensing melts in intermediate frequency furnace；
(3) dispensing sampling that will be in step (2) after fusing, analysis measure silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten,
Copper, tantalum, cobalt, pick, magnesium, calcium and niobium weight percent content, analyzed with target value, continuously add steel scrap, graphite and contain
There is the alloy of chromium, nickel, molybdenum, vanadium, tungsten, copper, tantalum, cobalt, pick, magnesium, calcium and niobium until fusing；Melt molten iron reaches intermediate frequency furnace volume one
Add ferrochrome when half；After ferrochrome fusing slagging-off, aluminium, boron, cerium mischmetal and titanium alloy fusing are added in；After fusing plus silicomanganese closes
Gold；Adjust the weight percent of silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper, tantalum, cobalt, niobium, pick, magnesium, calcium and cerium mischmetal
Close to process goal value, the content for adding in graphite adjustment carbon is matched close to process goal value content proportioning；5 points before intermediate frequency furnace is gone out
Clock adds cerium mischmetal and tin alloy makes the weight percent content of cerium and tin reach process goal value, obtains melt；
(4) melt that step (3) obtains is added in into deoxidier when temperature is 1600 DEG C~1700 DEG C, then goes out intermediate frequency furnace
It carries out moulding by casting and obtains steel alloy；
(5) steel alloy obtained after step (4) moulding by casting is carried out heat treatment to get product.
Preferably, intermediate frequency furnace furnace bottom is lined with hot lime in the step (2).
Preferably, any one of the deoxidier in the step (4) in aluminium ferromanganese, steel-core-aluminium, silicon carbide.
Preferably, heat treatment includes spreading nodularization in the step (5), quenches, tempering.
Preferably, diffusion nodularization is specially to be heated to the steel alloy after step (4) moulding by casting in the step (5)
1200 DEG C, 1.5~2.5 hours are kept the temperature, then falls within the range of 750 DEG C, 1~2 hour is kept the temperature, is finally cooled to intermediate frequency furnace
Room temperature.
Preferably, diffusion nodularization is specially to be heated to the steel alloy after step (4) moulding by casting in the step (5)
1200 DEG C, 2 hours are kept the temperature, then falls within the range of 750 DEG C, 1.5 hours is kept the temperature, is finally cooled to room temperature with intermediate frequency furnace.
It not only can guarantee that lamellar pearlite disappeared, but also a part can be retained and be not completely dissolved in using temperature heating specific in this way
The carbide of austenite as nodularization core, ultimately forms the normal spherodized structure of coarseer granular carbide, makes chemistry
Ingredient is uniform, improves the intensity of steel alloy；
Preferably, quenching is specially to spread the steel alloy obtained after nodularization to be heated to 1100 DEG C in the step (5), immediately
It is dipped in water and cools down.
Steel alloy after quenched can make overcooling austenite carry out martensite or bainite transformation, obtain martensite or shellfish
Family name's body tissue.
Preferably, tempering is specially quenched steel alloy to be reheated to 530 DEG C, and keep the temperature 2 in the step (5)
It~3 hours, is finally cooled to room temperature with intermediate frequency furnace.
Preferably, tempering is specially that quenched steel alloy is reheated to 530 DEG C, and keep the temperature in the step (5)
It 2.5 hours, is finally cooled to room temperature with intermediate frequency furnace.
Steel alloy after tempered can eliminate quenching stress, and Transformation of Retained Austenite is made to be improved firmly for bainite
Degree, and then ensure the wearability and toughness of steel alloy.
Compared with prior art, detailed description are as follows by the application：
The main function of carbon and chromium is to ensure carbon in cast iron compound quantity and form.With the raising of phosphorus content, carbide
Increase；With Cr/C than increase, the pattern of eutectic carbide experienced to be subtracted by continuous net-shaped → sheet → rod-shaped continuity degree
Small process, eutectic carbide crystal type undergo the change procedure by M3C → M3C+M7C3 → M7C3.There is data to point out：When
Eutectic carbide is constant, and Cr/C be 6.6-7.1 when, the failure crack extended capability with chrome cast iron is most strong.According to these principles, preferably
C amounts are set to carbon 0.10-0.50%, Cr amount for 0.5-3.5%.Cr in matrix can also improve the quenching degree of material.Nickel
Effect is to increase the quenching degree of rich chromium cast iron, inhibits transformation of the austenitic matrix to pearlite, promotes the formation of martensite base.
Shape, size, distribution and the quantity of steel inclusion, particularly sulfide severely impact the performance of steel, especially
It is plasticity and toughness.Rare earth add in steel in there is desulfurization, degasification, according to re inclusion generate thermodynamic condition with
Application practice, the affinity of rare earth element and oxygen and sulphur are noticeably greater than manganese and aluminium etc., and rare earth element is easily conjugated with oxygen, sulphur
Reaction, generates globular RE2O2S、RE2S3Re inclusions are waited, significantly improve what Low Alloying Multicomponent Steels were generated along crystal boundary
Brittle fracture.Therefore, after rare earth Dy ions, the amount of inclusions significantly reduces, and field trash tends to nodularization and is evenly distributed in
In steel, the toughness of steel is improved, will occur a large amount of dimple on impact fracture.Rare earth is surface active element, can increase knot
The nucleus heart generates speed, prevents grain growth.The refinement of crystal grain is conducive to the raising of steel plasticity and toughness.With the increasing of content of rare earth
Add, crystal grain refinement is more apparent, and the activation energy that this can increase austenite grain boundary migration with rare earth element is related.
Using low-carbon, carbon is dissolved in iron and forms solid solution the present invention, its content is specifically controlled in 0.10-0.50%, energy
Enough ensure the fundamental strength of steel；Silicon energy reinforced ferrite improves the intensity of steel, and deoxidation, Hydrogen Energy power are strong, and manganese can also strengthen iron element
Body, manganese are dissolved in cementite, obtain alloyed cementite (FeMn)3C, while pearlite can be made to attenuate again, being capable of effectively desulfurization, phosphorus
Harmful element, chromium can generate carbide Cr7C3、(CrFe)2C6, the hardness of steel is improved, plays reinforcing dispersion；Molybdenum can be thin
Change crystal grain, prevent temper brittleness.Specifically control is specifically controlled in the content of 0.6-2.0%, manganese in 0.8- the content of silicon
1.3%, depth of hardening zone can be increased, ensure the wearability of steel alloy, and can effectively evade steel belt roof bolt brittleness；Molybdenum
Content is specifically controlled in 0.1-0.5%, can further eliminate temper brittleness, can shape while steel alloy ductility is ensured
Into stable, Dispersed precipitate Carbide Phases, the intensity of steel alloy is further ensured；Specifically the content of chromium is controlled in 1-
3.5%, its brittleness can be reduced, and then reduce the brittleness of entire steel alloy；When boron is dissolved in austenite, solubility is less than
0.03%, the present invention specifically controls Boron contents in 0-0.1%, and boron element and the iron of separate out chemically react, raw
Iron boride is produced, can ensure wearability, and the boron element for being dissolved in austenite can prevent ferrite itself from giving birth to core, enclose ferrite
Core is given birth to around boron element, improves quenching degree, and uniformity is good；The present invention specifically employs cerium mischmetal, and cerium mischmetal can refine
Crystal grain purifies melt, eliminates column crystal, improves compactness；The content of cerium is specifically controlled in 0.3-1.0%, is given birth to tin
Into cerium tin compound, without the Ce elements chemically reacted, then deviated toward crystal boundary, and be embedded on the interface of crystal boundary,
It prevents from hindering tin atom that segregation phenomena occurs, free tin atom is allowed to be embedded between iron atom, due to the atom half of tin atom
Diameter is bigger than the atomic radius of iron atom, makes ferrite that lattice deformability occur, so as to which body hardness, intensity be made to change；It is specific
The content of nickel is controlled in 0.3-2.0%, nickel is pinned in body, hard compounds can be hindered toward cyrystal boundary segregation and
The body of generation lattice deformability is enable to restore, improves its impact flexibility；Vanadium, the 0.1- of the invention for specifically using 0-0.5%
1% tungsten, the copper of 0.05-0.3%, the tantalum of 0.005-0.015%, the cobalt of 0.05-0.15%, 0.02-0.15% pick,
The magnesium of 0.01-0.03%, the calcium of 0.003-0.01%, 0-0.15% niobium, effect is generation vanadium carbide, the hard such as tungsten carbide
Alloy and intermetallic compound add tantalum, cobalt, niobium crystal grain thinning, and niobium boron are promoted mutually to generate.
The present invention is in entire steel alloy in preparation process, and due to being under micro- carbon, matrix is ferrite, and flexibility is good,
Hardness improve be difficult, in each phase of niobium scattering and permeating, can crystal grain thinning and hinder matrix occur segregation phenomena；Cobalt simultaneously
Element also can crystal grain thinning, and not only easily and niobium formation but also can form a kind of niobium boron phase at intermetallic compound with boron, easily hinder
Hindering hard compounds, tantalum is to be easiest to crystal grain thinning, strengthens body toward cyrystal boundary segregation；It can promote the formation of niobium phase；Copper energy
Enough strengthen body, when it is within 530 DEG C, the lattice deformability for making body generation larger, after 530 DEG C, body deformation is extensive
It is multiple；With increasing for nickel element, the impact flexibility of body improves, meanwhile, nickel is pinned in body, can hinder hard compounds
Toward cyrystal boundary segregation, and the body of generation lattice deformability can be made to be difficult to restore；Increase but within 2.5% with the content of nickel element
When, increase the difficulty of the body recovery of lattice deformability, impact flexibility is improved；Silicon mainly plays a part of to strengthen body, with
The increase of element silicon, variation from high to low is presented in the impact flexibility of body；Vanadium plays crystal grain thinning, while is given birth to carbon
Into compound hardness it is high；When tungsten is micro and play crystal grain thinning, while also generate compound with carbon, be partially soluble in
Body, remaining is then precipitated in body surface；When tungsten and vanadium share, the Carbide Precipitation of tungsten can be promoted and be attached to body surface
On；Under the comprehensive function of these elements, make the steel alloy of generation that not only there is high impact flexibility, but also with high wear-resisting
Performance.
Diffusion nodularization in step (5) in the present invention refers to the steel alloy after moulding by casting being heated to 1200 DEG C, and
Heat preservation 2 hours when then reducing the temperature to 750 DEG C, keeps the temperature 1.5 hours, is finally cooled down with intermediate frequency furnace, using temperature specific in this way
Degree heating not only can guarantee that lamellar pearlite disappeared, but also can retain the carbide that a part is not completely dissolved in austenite, as nodularization
Core ultimately forms the normal spherodized structure of coarseer granular carbide, makes chemical composition uniform, improves the strong of steel alloy
Degree；Quenching refer to by the carbide being distributed on matrix after spreading nodularization obtained from steel alloy be heated to 1100 DEG C when, with
Be immersed in the water cooling, it is quenched after steel alloy overcooling austenite can be made to carry out martensite or bainite transformation, obtain
To martensite or bainite structure；It is tempered and refers to quenched steel alloy is reheated to 530 DEG C, and keep the temperature 2.5 hours, most
Cooled down afterwards with intermediate frequency furnace, it is tempered after steel alloy, quenching stress can be eliminated, and make Transformation of Retained Austenite for bainite and
Hardness is improved, and then ensures the wearability and toughness of steel alloy.
In conclusion the present invention is reasonably matched by using raw material, using the low boron of the low chromium of low-carbon, collocation cerium mischmetal, vanadium,
The materials such as tungsten, copper, tantalum, cobalt and niobium pass sequentially through determining dispensing, melting, sampling adjustment, moulding by casting and the last system of heat treatment
The low chromium wear-resisting alloy steel obtained, hardness can reach HRC42-56, and ballistic work is up to 11-20 (J/cm2), conjunction of the invention
Golden steel can either ensure high tenacity and shock resistance, and can improve wearability and hardness.
Specific embodiment
In order to which those skilled in the art is made to more fully understand technical scheme of the present invention, with reference to specific embodiment pair
The present invention is described in further detail.
Embodiment 1
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.15%, silicon 1.0%, manganese 0.8%, phosphorus 0.01%, sulphur 0.01%, chromium 1%, nickel 0.3%, molybdenum 0.1%, boron 0.03%, aluminium
0.1%, cerium 0.5%, tin 0.02%, vanadium 0.3%, tungsten 0.1%, copper 0.15%, tantalum 0.005%, cobalt 0.05%, pick 0.05%,
Magnesium 0.01%, calcium 0.003%, titanium 0.01%, niobium 0.05%, surplus are iron.
Preparation method is specially：
(1) process goal value is determined, weight percent proportioning is as follows：
Carbon 0.15%, silicon 1.0%%, manganese 0.8%, phosphorus 0.01%, sulphur 0.01%, chromium 1%, nickel 0.3%, molybdenum 0.1%, boron
0.03%, aluminium 0.1%, cerium 0.5%, tin 0.02%, vanadium 0.3%, tungsten 0.1%, copper 0.15%, tantalum 0.005%, cobalt 0.05%,
Pick 0.05%, magnesium 0.01%, calcium 0.003%, titanium 0.01%, niobium 0.05%, surplus are iron.
(2) dispensing：Choose scrap iron, steel scrap, cerium mischmetal and containing silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper,
Tantalum, cobalt, pick, magnesium, calcium and niobium alloy；
(3) melting：The dispensing in step (2) first is put into furnace bottom to be lined in the intermediate frequency furnace of hot lime, then is led to intermediate frequency furnace
Low current, full load power transmission after dispensing preheating in intermediate frequency furnace, until dispensing fusing in intermediate frequency furnace；
(4) sampling adjustment：Dispensing sampling that will be in step (3) after fusing, according to liquid medicine or spectrometer analysis measure silicon,
Manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper, tantalum, cobalt, pick, magnesium, calcium and niobium weight percent content, and according to a steps
In process goal value comparative analysis, add in steel scrap, graphite and containing chromium, nickel, molybdenum, vanadium, tungsten, copper, tantalum, cobalt, pick, magnesium, calcium and
The alloy of niobium is until fusing continues to feed；Fusing molten iron adds ferrochrome when reaching the half of intermediate frequency furnace volume；Ferrochrome melts
After slagging-off, aluminium, boron, cerium mischmetal and titanium alloy fusing are added in；Add silicomangan after fusing；Adjust silicon, manganese, chromium, nickel, molybdenum, boron,
Aluminium, tin, vanadium, tungsten, copper, tantalum, cobalt, niobium, pick, magnesium, calcium and cerium mischmetal weight percent content match close to process goal value, add
The content for entering graphite tune carbon is matched close to process goal value；Cerium mischmetal and tin alloy is added to make cerium mischmetal within 5 minutes before intermediate frequency furnace is gone out
Reach process goal value with the weight percent content of tin；
(5) moulding by casting：Melt after step (4) reaches process goal value adds in aluminium when temperature is 1650 degrees Celsius
Then ferromanganese goes out intermediate frequency furnace；
(6) it is heat-treated：Steel alloy after step (4) moulding by casting is diffused nodularization, is quenched, tempering is got product,
Wherein diffusion nodularization refers to the steel alloy after moulding by casting is heated to 1200 DEG C, and keep the temperature 2 hours, then reduces the temperature to
At 750 DEG C, 1.5 hours are kept the temperature, is finally cooled down with intermediate frequency furnace；Quenching refers to the carbide that will be distributed on matrix through spreading nodularization
When steel alloy obtained from afterwards is heated to 1100 DEG C, it is dipped in water cools down immediately；Tempering refers to quenched steel alloy
530 DEG C are reheated to, and keeps the temperature 2.5 hours, is finally cooled down with intermediate frequency furnace.
Embodiment 2
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.18%, silicon 1.5%, manganese 1%, phosphorus 0.02%, sulphur 0.02%, chromium 2%, nickel 0.4%, molybdenum 0.2%, boron 0.06%, aluminium
0.2%, cerium 0.8%, tin 0.06%, vanadium 0.3%, tungsten 0.6%, copper 0.25%, tantalum 0.008%, cobalt 0.08%, pick 0.05%,
Magnesium 0.02%, calcium 0.003%, titanium 0.02%, niobium 0.1%, surplus are iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 3
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.3%, silicon 2.0%, manganese 1.3%, phosphorus 0.03%, sulphur 0.01%, chromium 3.5%, nickel 2.0%, molybdenum 0.5%, boron 0.1%, aluminium
0.3%, cerium 1.0%, tin 0.1%, vanadium 0.5%, tungsten 1%, copper 0.3%, tantalum 0.015%, cobalt 0.15%, pick 0.08%, magnesium
0.025%, calcium 0.004%, titanium 0.08%, niobium 0.15%, surplus is iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 4
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.2%, silicon 1.5%, manganese 1.2%, phosphorus 0.02%, sulphur 0.01%, chromium 2.0%, nickel 2.0%, molybdenum 0.5%, boron 0.1%, aluminium
0.3%, cerium 1.0%, tin 0.15%, vanadium 0.3%, tungsten 1%, copper 0.2%, tantalum 0.015%, cobalt 0.15%, pick 0.08%, magnesium
0.025%, calcium 0.004%, titanium 0.08%, niobium 0.15%, surplus is iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 5
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.4%, silicon 2.0%, manganese 1.2%, phosphorus 0.01%, sulphur 0.02%, chromium 3.5%, nickel 2.0%, molybdenum 0.5%, boron 0.1%, aluminium
0.3%, cerium 1.0%, tin 0.1%, vanadium 0.5%, tungsten 1%, copper 0.3%, tantalum 0.010%, cobalt 0.10%, pick 0.10%, magnesium
0.025%, calcium 0.005%, titanium 0.08%, niobium 0.15%, surplus is iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 6
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.25%, silicon 2.0%, manganese 1.1%, phosphorus 0.02%, sulphur 0.01%, chromium 1.75%, nickel 2.0%, molybdenum 0.3%, boron 0.1%, aluminium
0.3%, cerium 0.5%, tin 0.1%, vanadium 0.5%, tungsten 1%, copper 0.3%, tantalum 0.010%, cobalt 0.10%, pick 0.06%, magnesium
0.02%, calcium 0.005%, titanium 0.08%, niobium 0.15%, surplus is iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 7
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.15%, silicon 2.0%, manganese 1.3%, phosphorus 0.01%, sulphur 0.01%, chromium 1.05%, nickel 2.0%, molybdenum 0.3%, boron 0.1%, aluminium
0.15%, cerium 0.5%, tin 0.05%, vanadium 0.5%, tungsten 1%, copper 0.3%, tantalum 0.010%, cobalt 0.10%, pick 0.06%, magnesium
0.02%, calcium 0.007%, titanium 0.04%, niobium 0.10%, surplus is iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 8
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.15%, silicon 2.0%, manganese 1.3%, phosphorus 0.01%, sulphur 0.01%, chromium 1.05%, nickel 0.8%, molybdenum 0.2%, boron 0.1%, aluminium
0.1%, cerium 0.6%, tin 0.07%, vanadium 0.3%, tungsten 0.8%, copper 0.3%, tantalum 0.010%, cobalt 0.10%, pick 0.06%, magnesium
0.02%, calcium 0.007%, titanium 0.04%, niobium 0.10%, surplus is iron.
Preparation method in addition to process goal value is different remaining each step with embodiment 1.
Embodiment 9
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.25%, silicon 2.0%, manganese 1.3%, phosphorus 0.01%, sulphur 0.01%, chromium 1.75%, nickel 0.8%, molybdenum 0.2%, boron 0.1%, aluminium
0.1%, cerium 0.6%, tin 0.07%, vanadium 0.3%, tungsten 0.8%, copper 0.3%, tantalum 0.010%, cobalt 0.10%, pick 0.06%, magnesium
0.02%, calcium 0.007%, titanium 0.04%, niobium 0.10%, surplus is iron.
Embodiment 10
A kind of low chromium shock resistance high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon
0.25%, silicon 2.0%, manganese 0.8%, phosphorus 0.02%, sulphur 0.01%, chromium 1.85%, nickel 0.8%, molybdenum 0.2%, boron 0.1%, aluminium
0.1%, cerium 0.6%, tin 0.07%, vanadium 0.3%, tungsten 0.8%, copper 0.3%, tantalum 0.010%, cobalt 0.10%, pick 0.06%, magnesium
0.02%, calcium 0.01%, titanium 0.08%, niobium 0.10%, surplus is iron.
Comparative example 1
A kind of high-temperature antiwear alloy steel includes the chemical element component of following weight percent：77.5~79% steel scrap,
18.3~20.7% high carbon ferro-chrome, 0.67~1.0% molybdenum-iron, 0.33~0.5% vanadium iron, suitable silicon, manganese deoxidier,
0.05~0.1% ferrotianium, 0.02~0.05% zirconium, 0.6~1.2% aluminium and 0.12~0.5% rare earth element, in this way
Steel alloy carbon containing 1.45~1.70% obtained, containing chromium 11.0~12.5%, containing molybdenum 0.4~0.6%, containing vanadium 0.15~
0.30%, titaniferous 0.02~0.05%, containing zirconium 0.02~0.05%, containing aluminium 0.6~1.2%, containing rare earth element 0.05~
0.15%.
Specifically preparation method is：234.5kg steel scraps, 60kg high carbon ferro-chromes and 3kg molybdenum-irons are fitted into intermediate frequency furnace and melted
Then refining adds in 1.5kg vanadium iron and suitable manganese deoxidier in 8 minutes before coming out of the stove in stove, be eventually adding 0.3kg ferrotianiums,
0.3kg zirconiums, 3kg aluminium, 0.75kg ceriums and lanthanum；The guiding wheel that guiding wheel workpiece moulding progress sand mold cast gained is pressed after melting is closed
Golden steel part is annealed in two times, is that homo genizing annelaing is diffused at 1100 DEG C for the first time, keeps the temperature 7 hours, then furnace cooling,
It is spheroidizing for the second time, guiding wheel alloy steel piece is warming up to 860 DEG C with stove, and heat preservation cools to 730 DEG C with the furnace after 3 hours, then
Heat preservation 6 hours, comes out of the stove with being furnace-cooled to 500 DEG C, is air-cooled to room temperature；The guiding wheel alloy steel piece of net annealing gained is through roughing
After carry out quenching treatment, hardening heat takes 1000 DEG C, and soaking time is 0.5~1 hour, is air-cooled to room temperature；By quenched processing
Guiding wheel alloy steel piece afterwards carries out double tempering processing, and temperature is selected as 220 DEG C, obtains finished product.
Comparative example 2
A kind of high-temperature antiwear alloy steel includes the chemical element component of following weight percent：Carbon 0.3%, silicon 0.25%,
Manganese 0.55%, phosphorus≤0.025%, sulphur 0.02%, chromium 0.09%, nickel 0.28%, molybdenum 0.02%, titanium 0.18%, vanadium 0.2%, tungsten
0.4%th, the surplus of niobium 0.3%, cobalt 0.11%, copper 0.2%, aluminium≤0.2%, boron≤0.15%, nitrogen≤0.3% for iron and can not be kept away
The impurity exempted from.
Preparation method is specially：
S1, chemical composition is weighed as carbon 0.3%, silicon 0.25%, manganese 0.55%, phosphorus≤0.025%, sulphur 0.02%, chromium
0.09%th, nickel 0.28%, molybdenum 0.02%, titanium 0.18%, vanadium 0.2%, tungsten 0.4%, niobium 0.3%, cobalt 0.11%, copper 0.2%, aluminium
≤ 0.2%, boron≤0.15%, nitrogen≤0.3% and inevitable impurity smelted in mixing input smelting furnace, are obtained
To steel alloy blank；
S2, it after the steel alloy blank obtained in step S1 is passed through annealing, places and carries out high temperature forging on forging machine, obtain
To steel alloy crude product；
S3, by the steel alloy crude product obtained by step S2 after Overheating Treatment, successively carry out just hot rolling and fine hot rolling behaviour
Make, obtain high-intensity and high-tenacity steel alloy finished product；
S4, it after the high-intensity and high-tenacity steel alloy finished product obtained by step S3 is passed through annealing heat-treats, is cooled to room temperature,
Pass through inspection, packaging and storage.
Smelting temperature is heated to 380 DEG C in the step S1, is then warming up to 830 DEG C with the speed of≤100 DEG C/h, melting
Time is 2 hours, is then cooled to 100 DEG C DEG C with the speed of≤50 DEG C/h, then air cooling to room temperature.
Annealing is cooled to 100 DEG C DEG C with the speed of≤50 DEG C/h in the step S2, then air cooling to room temperature, annealing
1 hour time.
Forging temperature is first heated to 640 DEG C DEG C in the step S2, keeps this temperature 1h, then heats to 900 DEG C
DEG C and keep this temperature 0.75h, then heat to 1066 DEG C DEG C.
Just hot-rolled temperature is 1150 DEG C DEG C, time 1h in the step S3, and fine hot-rolled temperature is 800 DEG C DEG C, the time
For 0.5h.
The step S4 annealing heat-treats temperature is 500 DEG C.
Embodiment 11
For the performance further illustrated the present invention, by the embodiment of the present invention 1~10 and the machinery of existing comparative example 1~2
Performance is made that comparison, such as following table：
As can be seen from the above table, the steel alloy prepared by the proportioning of the application and preparation method not only ensure that centainly
Hardness, and greatly improve its impact resistance, toughness and wearability.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be subject to claim limited range.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
Protection scope of the present invention is also should be regarded as into retouching.
Claims (9)
1. a kind of low chromium shock resistance high-temperature antiwear alloy steel, which is characterized in that the chemical element including following weight percent into
Point：Carbon 0.10-0.50%, silicon 0.4-2.2%, manganese 0.5-1.5%, phosphorus ＜ 0.04%, sulphur ＜ 0.04%, chromium 0.5-3.5%, nickel
0.2-2.2%, molybdenum 0.1-0.7%, boron 0-0.2%, aluminium 0.1-0.5%, cerium 0.2-1.2%, tin 0.02-0.20%, vanadium 0-
0.8%, tungsten 0.1-1.5%, copper 0.05-0.4%, tantalum 0.005-0.020%, cobalt 0.05-0.20%, pick 0.05-0.25%, magnesium
0.01-0.04%, calcium 0.003-0.015%, titanium 0-0.08%, niobium 0-0.15%, surplus are iron.
2. low chromium shock resistance high-temperature antiwear alloy steel according to claim 1, which is characterized in that including following weight percent
The chemical element component of ratio：Carbon 0.15-0.40%, silicon 0.6-2.0%, manganese 0.8-1.3%, phosphorus ＜ 0.04%, sulphur ＜ 0.04%,
Chromium 1-3.5%, nickel 0.3-2.0%, molybdenum 0.1-0.5%, boron 0-0.1%, aluminium 0.1-0.3%, cerium 0.3-1.0%, tin 0.02-
0.15%, vanadium 0-0.5%, tungsten 0.1-1%, copper 0.05-0.3%, tantalum 0.005-0.015%, cobalt 0.05-0.15%, pick 0.05-
0.2%, magnesium 0.01-0.03%, calcium 0.003-0.01%, titanium 0-0.08%, niobium 0-0.15%, surplus are iron.
3. a kind of preparation method of low chromium shock resistance high-temperature antiwear alloy steel, which is characterized in that include the following steps：
(1) choose scrap iron, steel scrap, cerium mischmetal and containing silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper, tantalum, cobalt, pick,
Magnesium, calcium, niobium, titanium alloy；
(2) dispensing in step (1) is put into intermediate frequency furnace, leading to low current to intermediate frequency furnace preheats, full load power transmission after preheating, until
Dispensing melts in intermediate frequency furnace；
(3) dispensing sampling that will be in step (2) after fusing, analysis measure silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper,
Tantalum, cobalt, pick, magnesium, calcium and niobium weight percent content, analyzed with target value, continuously add steel scrap, graphite and contain
Chromium, nickel, molybdenum, vanadium, tungsten, copper, tantalum, cobalt, pick, magnesium, calcium and niobium alloy until fusing；Melt the half that molten iron reaches intermediate frequency furnace volume
When add ferrochrome；After ferrochrome fusing slagging-off, aluminium, boron, cerium mischmetal and titanium alloy fusing are added in；After fusing plus silicomanganese closes
Gold；Adjust the weight percent of silicon, manganese, chromium, nickel, molybdenum, boron, aluminium, tin, vanadium, tungsten, copper, tantalum, cobalt, niobium, pick, magnesium, calcium and cerium mischmetal
Close to process goal value, the content for adding in graphite adjustment carbon is matched close to process goal value content proportioning；5 points before intermediate frequency furnace is gone out
Clock adds cerium mischmetal and tin alloy makes the weight percent content of cerium and tin reach process goal value, obtains melt；
(4) melt that step (3) obtains is added in into deoxidier when temperature is 1600 DEG C~1700 DEG C, then goes out intermediate frequency furnace progress
Moulding by casting obtains steel alloy；
(5) steel alloy obtained after step (4) moulding by casting is carried out heat treatment to get product.
4. the preparation method of low chromium wear-resisting alloy steel according to claim 3, which is characterized in that in the step (2)
Frequency stove furnace bottom is lined with hot lime.
5. the preparation method of low chromium shock resistance high-temperature antiwear alloy steel according to claim 3, which is characterized in that the institute
State any one of the deoxidier in step (4) in aluminium ferromanganese, steel-core-aluminium, silicon carbide.
6. the preparation method of low chromium shock resistance high-temperature antiwear alloy steel according to claim 3, which is characterized in that the step
Suddenly heat treatment is specially diffusion nodularization in (5), is quenched, tempering.
7. the preparation method of low chromium shock resistance high-temperature antiwear alloy steel according to claim 6, which is characterized in that the step
Suddenly diffusion nodularization is specially that the steel alloy after step (4) moulding by casting is heated to 1200 DEG C in (5), and heat preservation 1.5~2.5 is small
When, 750 DEG C are then fallen within the range of, 1~2 hour is kept the temperature, is finally cooled to room temperature with intermediate frequency furnace.
8. the preparation method of low chromium shock resistance high-temperature antiwear alloy steel according to claim 6, which is characterized in that the step
Suddenly quenching is specially to spread the steel alloy obtained after nodularization to be heated to 1100 DEG C in (5), is dipped in water cools down immediately.
9. the preparation method of low chromium shock resistance high-temperature antiwear alloy steel according to claim 6, which is characterized in that the step
Suddenly tempering is specially quenched steel alloy to be reheated to 530 DEG C, and keep the temperature 2~3 hours in (5), finally with intermediate frequency furnace
It is cooled to room temperature.
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| CN115707790B (en) * | 2021-08-20 | 2023-08-29 | 通用汽车环球科技运作有限责任公司 | Cast steel alloy component for vehicles with reduced ferrite and enhanced ultimate tensile strength |
| CN115354224A (en) * | 2022-08-10 | 2022-11-18 | 乐山市泰钢鑫科机械制造有限公司 | Material of high-toughness, high-strength and low-temperature-resistant low-alloy steel and preparation method thereof |
| CN115386794A (en) * | 2022-08-10 | 2022-11-25 | 乐山市泰钢鑫科机械制造有限公司 | High-toughness wear-resistant high-speed steel and preparation method thereof |
| CN115821169A (en) * | 2022-12-21 | 2023-03-21 | 湖南华菱涟源钢铁有限公司 | High-strength steel and preparation method and application thereof |
| CN115821169B (en) * | 2022-12-21 | 2024-04-05 | 湖南华菱涟源钢铁有限公司 | High-strength steel and preparation method and application thereof |
| CN116479338A (en) * | 2023-04-04 | 2023-07-25 | 湖南力神新材料科技有限公司 | Alloy steel and surface strengthening process thereof |
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Application publication date: 20180629 |