CN105779860A - Preparation method for wear-resistant pipe long in service life - Google Patents

Preparation method for wear-resistant pipe long in service life Download PDF

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Publication number
CN105779860A
CN105779860A CN201610147637.2A CN201610147637A CN105779860A CN 105779860 A CN105779860 A CN 105779860A CN 201610147637 A CN201610147637 A CN 201610147637A CN 105779860 A CN105779860 A CN 105779860A
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service life
resistant pipe
temperature
long wear
preparation
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徐先锋
胡正才
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ANHUI ZHENGSHI NEW BUILDING MATERIAL Co Ltd
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ANHUI ZHENGSHI NEW BUILDING MATERIAL Co Ltd
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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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/007—Heat treatment of ferrous alloys containing Co
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • 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
    • 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
    • C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
    • C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
    • 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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a preparation method for a wear-resistant pipe long in service life. The preparation method includes the steps that the temperature of raw materials is raised, and heat preservation is conducted to obtain a first material; pouring and cooling are conducted on the first material, and surface machine processing is conducted to obtain a second material; the temperature of the second material is raised to TA DEG C for austenitizing, then heat preservation is conducted for tA h, the second material is taken out and put in a nitrate bath, the temperature is raised to TB DEG C, heat preservation is conducted for tB h, air cooling is conducted till the temperature is 100 DEG C to 120 DEG C, the temperature continues to rise to TC DEG C for tempering, heat preservation is conducted for tC h, and air cooling is conducted till the temperature is the room temperature to obtain the wear-resistant pipe long in service life; TA ranges from 1050 to 1100, tA ranges from 2.6 to 3.2, TB ranges from 300 to 330, tB ranges from 1 to 1.5, TC ranges from 200 to 220, and tC ranges from 3 to 4; and TA, tA, TB, tB, TC and tC conform to the following relations that TB/K1=TA-955, TAxtA=K2xTBxtB+TCxtC, the value of K1 ranges from 2.5 to 3, and the value of K2 ranges from 4 to 9.

Description

A kind of service life long wear-resistant pipe preparation method
Technical field
The present invention relates to wear-resistant pipe technical field, particularly relate to the preparation method of long wear-resistant pipe in a kind of service life.
Background technology
In the industries such as metallurgy, mine, electric power, oil, building, coal, the conveying of material is all passed through Pipeline pressure carries, and owing to material is block or graininess, conveying pipe is by bigger pressure and serious mill Damaging, for ensureing the carrying out of normal work, pipeline must possess the wear-resistant impact-resistant attribute of excellence.But it is existing The wear and shock-resistant performance having pipeline in technology is the most not enough, also needs to improve.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes the system of long wear-resistant pipe in a kind of service life Preparation Method, gained wear-resistant pipe anti-wear performance is excellent, and its hardness is up to HRC 72, and impact flexibility is up to 8.2J/cm2, Meet actually used during requirement to wear-resistant pipe.
The present invention propose a kind of service life long wear-resistant pipe preparation method, comprise the steps:
S1, raw material being warming up in argon gas atmosphere molten condition, then vacuum heat-preserving obtains the first material, Wherein the first material includes by weight percentage: C:0.8～1.1%, Si:0.45～0.55%, Mn:0.2～ 0.3%, Ni:0.12～0.15%, W:0.05～0.08%, Nb:0.15～0.18%, Zr:0.03～0.06%, Cr:3.6～4.0%, Ti:0.6～0.9%, Co:0.04～0.07%, Mo:0.13～0.16%, B:0.09～ 0.12%, Ce:0.15～0.18%, S≤0.02%, P≤0.02%, surplus is Fe；
S2, the first material is come out of the stove and pours into a mould, be cooled to 375～395 DEG C, carry out surface machine and process and obtain Second material；
S3, the second material is warming up to TADEG C carry out austenitizing, be then incubated tAH, taking-up is placed in temperature and is In the salt made from earth containing a comparatively high percentage of sodium chloride bath of 200～220 DEG C, it is warming up to TBDEG C, it is incubated tBH, air-cooled to 100～120 DEG C, then rise Warm to TCDEG C it is tempered, is incubated tCH, air cooling to room temperature obtains long wear-resistant pipe in service life；Wherein, TA It is 1050～1100, tAIt is 2.6～3.2, TBIt is 300～330, tBIt is 1～1.5, TCIt is 200～220, tCIt is 3～4；TA、tA、TB、tB、TC、tCMeet following relation: TB/K1=TA-955, TA×tA=K2×TB×tB +TC×tC, K1Value be 2.5～3, K2Value be 4～9.
In the present invention, each element interaction is as follows:
Carbon (C): as the essential element of formation graphite nodule, can effectively control graphite number and graphite size, Meanwhile, suitable carbon equivalent can make iron liquid readily flowed, increases the mold-filling capacity of iron liquid, reduces shrinkage porosite contracting Hole, improves the compactness of foundry goods, but carbon content is too high, easily produces graphite floatation, affects the property of cast iron Can, also can reduce the atmospheric corrosion resistance ability of steel, increase cold brittleness and the aging sensitivity of steel.
Silicon (Si): as strongly facilitating graphited element, the effect bred can be played again.Higher silicon content To the cast of foundry goods and have the biggest benefit from feeding, can significantly improve the elastic limit of steel, yield point and Tensile strength.Silicone content is high, to forming globular graphite favorably, but silicone content more than 3.0% time, impact tough Property can drastically reduce, moreover it is possible to reduce steel welding performance.Silicon and molybdenum, tungsten, chromium etc. combine, and are improved anti-corruption Erosion property and oxidation resistant effect.
Manganese (Mn): can expand austenitic area, enhances the stability of austenite；It is solid-solubilized in matrix and carbonization In thing, matrix can be strengthened, improve hardness, improve the quenching degree of matrix.But, higher manganese content meeting Cause coarse grains, and the border being easily enriched to eutectic cell forms pearlite or carbide.Carbonization time serious Thing is formed netted, greatly have impact on the toughness of material.
Nickel (Ni): reinforced ferrite refine pearlite in steel, can improve the intensity of steel, and keep good Plasticity and toughness, moreover it is possible to improve steel soda acid is had higher corrosion resistance, at high temperature have antirust and resistance to Heat energy power.
Tungsten (W): tungsten carbide can be formed with carbon, there is the highest hardness and wearability, red hardness can be significantly improved And heat resistance.
Niobium (Nb): energy crystal grain thinning and the superheated susceptivity of reduction steel and temper brittleness, improves intensity, anti-air Resistant to hydrogen, nitrogen, ammonia corrosion ability under corrosion and high temperature, improving welding property, prevent intercrystalline corrosion phenomenon, but Plasticity and toughness have declined.
Zirconium (Zr): effect and niobium, titanium, vanadium are similar in steel, have the effect of deoxidation, purification and crystal grain thinning, Improve the low-temperature flexibility of steel, eliminate aging phenomenon, improve the punching performance of steel.
Chromium (Cr): can improve quenching degree, can significantly improve intensity, hardness and wearability, moreover it is possible to improve the anti-of steel Oxidisability and corrosion resistance, but plasticity and toughness can be reduced, also it is carbide former, at spheroidal graphite simultaneously In cast iron, it can generate M with carbon3C-type carbide can as effective Hard Inclusion Dispersed precipitate on matrix, Improve hardness and the abrasion resistance of material.Find to confirm through test: containing Cr0.5%, carbide accounts for 15～20%, Meet actual demand.
Titanium (Ti): can make the dense internal organization of steel, the grain structure of refinement steel, thus improve steel intensity and Toughness, eliminates or alleviates the intercrystalline corrosion phenomenon of steel, reduces aging sensitivity and cold brittleness, improves weldability Can its energy crystal grain thinning power.Solution strengthening effect is strong, but reduces the toughness of solid solution, is solid-solution in austenite Improve the quenching degree of steel, but chemical combination titanium reduces the quenching degree of steel.Improve temper resistance, and have secondary hard Change effect, improves the non-oxidizability of heat resisting steel and heat resistance, such as creep and creep rupture strength, and improves the weldering of steel Connecing property.
Cobalt (Co): energy reinforced ferrite, adds in carbon steel, can improve the hard of steel under annealing or normalized condition Degree, yield point and tensile strength, also have antioxygenic property, make steel have high high temperature hardness, heat-resisting Steel and heat-resisting alloy are applied.
Molybdenum (Mo): the crystal grain of refinement steel, improves quenching degree and thermostrength, keeps enough strong when high temperature Degree and creep resisting ability, improve mechanical performance.The fragility that steel alloy causes can also be suppressed due to fire.Cobalt Cooperate with molybdenum and can make steel ultrahigh hardness and favorable comprehensive mechanical property.
Boron (B): the boron adding trace in steel just can improve compactness and the hot rolling performance of steel, improves intensity.
Cerium (Ce): affect the type of nonmetallic inclusionsin steel, quantity and form, purifies steel, decreases Al2O3Harm to fatigue behaviour, the most highly advantageous to high cycle fatigue and low-cycle fatigue, promote that the tissue in steel turns Become, can be adsorbed on the solid-state nucleating surface grown up, form thin enriched layer, drop low-surface-energy, hinder Crystal growth, thus reduce crystal growth rate, refine skeleton, suppress column crystals growth, enter And reduce dendritic segregation and regional segregation, crystal grain thinning, suppresses temper brittleness, improves the thermoplasticity of steel, heat Epistasis, fatigue behaviour, wearability, resistant to hydrogen embrittlement, non-oxidizability.
Preferably, in first material of S1, Nb element, Ti element, the content of Mo element meet such as ShiShimonoseki System: 100 × nTi=[100 × (nNb+nMo)]2/ 4+0.7, wherein nNb、nTi、nMoRespectively represent Nb element, Ti element, Mo element be shared percentage by weight in the first material.
Preferably, in first material of S1, the weight ratio of Ni element and Co element is 13～14:5～6.
Preferably, in first material of S1, the weight ratio of W element and Cr element be 0.06～0.07:3.7～ 3.9。
Preferably, in S1, the first material includes by weight percentage: C:0.9～1.0%, Si:0.48～0.52%, Mn:0.25～0.28%, Ni:0.13～0.14%, W:0.06～0.07%, Nb:0.16～0.17%, Zr:0.04～0.05%, Cr:3.7～3.9%, Ti:0.7～0.8%, Co:0.05～0.06%, Mo:0.14～ 0.15%, B:0.10～0.11%, Ce:0.16～0.17%, S≤0.02%, P≤0.02%, surplus is Fe；
Preferably, in S3, K1Value be 2.6～2.8, K2Value be 6～8.
When austenitizing temperature is higher, when in austenite, carbon content is higher, austenite is more stable, final group Having more high-carbon retained austenite in knitting, when isothermal temperature is higher, austenite is difficult to be transformed into needle-like iron Ferritic and martensite, have more high-carbon retained austenite in also making finally to organize；And austenite structure The impact flexibility of material can be improved, but the hardness of material can be reduced；In heat treatment process, impact tough Property and scale of hardness reveal the process vied each other, dynamically change, therefore, according to alloying component adjust be heat-treated System, balance-impact toughness becomes, with the relation of hardness, the key obtaining good combination property.
The present invention uses strong carbide to be combined with each other with isothermal hardening so that disperse in bainite+austenitic matrix It is dispersed with M3C-type chromium carbide, considers austenitizing temperature, austempering temperature, tempering by entirety Temperature, austenitizing time, the temperature retention time of isothermal hardening, the temperature retention time of tempering, disclose six techniques Relation between parameter, by considering six technological parameters, optimizes system of heat treatment process, Make material have a good combination property, find austenitizing temperature, austempering temperature, temperature, Existence function relation between austenitizing time, isothermal quenching time and tempering time, austempering temperature with Austenitizing temperature to raise and raise, make gained long wear-resistant pipe in service life crystal grain of the present invention refinement uniformly, Significantly improve the red brittleness of gained long wear-resistant pipe in service life of the present invention, by austenitizing temperature, isothermal Hardening heat, temperature are defined, and the anti-wear performance making gained long wear-resistant pipe in service life of the present invention is excellent Different, its hardness is up to HRC 72, and impact flexibility is up to 8.2J/cm2, can increase the service life.
The present invention uses niobium element, titanium elements, molybdenum element to cooperate, and these three kinds of element solid solutions are in austenite In, reduce Carbon diffusion speed, thus delay the transformation of austenite, extend the incubation period of bainite transformation, Therefore it is easy to increase the ferritic quantity of bainite type；Nickel element and cobalt element cooperate, reinforced ferrite, Refinement pearlite, while making the present invention keep good plasticity and toughness, improves the intensity of the present invention；Tungsten Element and chromium element cooperate, and hinder the movement of crystal boundary and growing up of crystal grain in austenitization, Refine the crystal grain of austenite, thus provided more favorable nucleation position for bainite so that at isothermal In quenching process, the quantity of bainite increases, and has refined bainite structure, makes retained austenite in outer ring Amount gradually decreases, and the amount of acicular ferrite is gradually increased and becomes tiny densification, and the quantity of carbide also with Increase, the toughness of the present invention, hardness, anti-wear performance are greatly improved.
Detailed description of the invention
Below, by specific embodiment, technical scheme is described in detail.
Embodiment 1
The present invention propose a kind of service life long wear-resistant pipe preparation method, comprise the steps:
S1, raw material being warming up in argon gas atmosphere molten condition, then vacuum heat-preserving obtains the first material, Wherein the first material includes by weight percentage: C:0.8%, Si:0.55%, Mn:0.2%, Ni:0.15%, W:0.05%, Nb:0.18%, Zr:0.03%, Cr:4.0%, Ti:0.7289%, Co:0.04%, Mo:0.16%, B:0.09%, Ce:0.18%, S≤0.02%, P≤0.02%, surplus is Fe；
S2, the first material is come out of the stove and pours into a mould, be cooled to 375 DEG C, carry out surface machine and process and obtain the second thing Material；
S3, the second material is warming up to 1075 DEG C carries out austenitizing, be then incubated 2.8h, take out and be placed in temperature Degree is in the salt made from earth containing a comparatively high percentage of sodium chloride bath of 220 DEG C, is warming up to 300 DEG C, is incubated 1.5h, air-cooled to 100 DEG C, is then warming up to 200 DEG C are tempered, and are incubated 4h, and air cooling to room temperature obtains long wear-resistant pipe in service life.
Embodiment 2
The present invention propose a kind of service life long wear-resistant pipe preparation method, comprise the steps:
S1, raw material being warming up in argon gas atmosphere molten condition, then vacuum heat-preserving obtains the first material, Wherein the first material includes by weight percentage: C:1.1%, Si:0.45%, Mn:0.3%, Ni:0.12%, W:0.08%, Nb:0.15%, Zr:0.06%, Cr:3.6%, Ti:0.7196%, Co:0.07%, Mo:0.13%, B:0.12%, Ce:0.15%, S≤0.02%, P≤0.02%, surplus is Fe；
S2, the first material is come out of the stove and pours into a mould, be cooled to 395 DEG C, carry out surface machine and process and obtain the second thing Material；
S3, the second material is warming up to 1065 DEG C carries out austenitizing, be then incubated 3h, take out and be placed in temperature It is in the salt made from earth containing a comparatively high percentage of sodium chloride bath of 200 DEG C, is warming up to 330 DEG C, is incubated 1h, air-cooled to 120 DEG C, is then warming up to 220 DEG C Being tempered, be incubated 3h, air cooling to room temperature obtains long wear-resistant pipe in service life.
Embodiment 3
The present invention propose a kind of service life long wear-resistant pipe preparation method, comprise the steps:
S1, raw material being warming up in argon gas atmosphere molten condition, then vacuum heat-preserving obtains the first material, Wherein the first material includes by weight percentage: C:0.9%, Si:0.52%, Mn:0.25%, Ni:0.14%, W:0.06%, Nb:0.17%, Zr:0.04%, Cr:3.9%, Ti:0.7256%, Co:0.05%, Mo:0.15%, B:0.10%, Ce:0.17%, S≤0.02%, P≤0.02%, surplus is Fe；
S2, the first material is come out of the stove and pours into a mould, be cooled to 380 DEG C, carry out surface machine and process and obtain the second thing Material；
S3, the second material is warming up to 1070 DEG C carries out austenitizing, be then incubated 3h, take out and be placed in temperature It is in the salt made from earth containing a comparatively high percentage of sodium chloride bath of 215 DEG C, is warming up to 310 DEG C, is incubated 1.3h, air-cooled to 105 DEG C, is then warming up to 205 DEG C Being tempered, be incubated 3.8h, air cooling to room temperature obtains long wear-resistant pipe in service life.
Embodiment 4
The present invention propose a kind of service life long wear-resistant pipe preparation method, comprise the steps:
S1, raw material being warming up in argon gas atmosphere molten condition, then vacuum heat-preserving obtains the first material, Wherein the first material includes by weight percentage: C:1.0%, Si:0.48%, Mn:0.28%, Ni:0.13%, W:0.07%, Nb:0.16%, Zr:0.05%, Cr:3.7%, Ti:0.7225%, Co:0.06%, Mo:0.14%, B:0.11%, Ce:0.16%, S≤0.02%, P≤0.02%, surplus is Fe；
S2, the first material is come out of the stove and pours into a mould, be cooled to 390 DEG C, carry out surface machine and process and obtain the second thing Material；
S3, the second material is warming up to 1073 DEG C carries out austenitizing, be then incubated 2.9h, take out and be placed in temperature Degree is in the salt made from earth containing a comparatively high percentage of sodium chloride bath of 205 DEG C, is warming up to 320 DEG C, is incubated 1.2h, air-cooled to 110 DEG C, is then warming up to 210 DEG C are tempered, and are incubated 3.2h, and air cooling to room temperature obtains long wear-resistant pipe in service life.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention not office Being limited to this, any those familiar with the art is in the technical scope that the invention discloses, according to this The technical scheme of invention and inventive concept thereof in addition equivalent or change, all should contain the protection in the present invention Within the scope of.

Claims (6)

1. one kind service life long wear-resistant pipe preparation method, it is characterised in that comprise the steps:
S1, raw material is warming up in argon gas atmosphere molten condition, then vacuum heat-preserving obtains the first material, wherein the first material includes by weight percentage: C:0.8～1.1%, Si:0.45～0.55%, Mn:0.2～0.3%, Ni:0.12～0.15%, W:0.05～0.08%, Nb:0.15～0.18%, Zr:0.03～0.06%, Cr:3.6～4.0%, Ti:0.6～0.9%, Co:0.04～0.07%, Mo:0.13～0.16%, B:0.09～0.12%, Ce:0.15～0.18%, S≤0.02%, P≤0.02%, surplus is Fe；
S2, the first material is come out of the stove and pours into a mould, be cooled to 375～395 DEG C, carry out surface machine and process and obtain the second material；
S3, the second material is warming up to TADEG C carry out austenitizing, be then incubated tAH, takes out and is placed in the salt made from earth containing a comparatively high percentage of sodium chloride bath that temperature is 200～220 DEG C, be warming up to TBDEG C, it is incubated tBH, is then warming up to T by air-cooled to 100～120 DEG CCDEG C it is tempered, is incubated tCH, air cooling to room temperature obtains long wear-resistant pipe in service life；Wherein, TAIt is 1050～1100, tAIt is 2.6～3.2, TBIt is 300～330, tBIt is 1～1.5, TCIt is 200～220, tCIt is 3～4；TA、tA、TB、tB、TC、tCMeet following relation: TB/K1=TA-955, TA×tA=K2×TB×tB+TC×tC, K1Value be 2.5～3, K2Value be 4～9.
The most according to claim 1, the preparation method of long wear-resistant pipe in service life, it is characterised in that in first material of S1, Nb element, Ti element, the content of Mo element meet following relation: 100 × nTi=[100 × (nNb+nMo)]2/ 4+0.7, wherein nNb、nTi、nMoRepresent Nb element, Ti element, Mo element shared percentage by weight in the first material respectively.
Service life the most according to claim 1 or claim 2 long wear-resistant pipe preparation method, it is characterised in that in first material of S1, the weight ratio of Ni element and Co element is 13～14:5～6.
4. according to described in any one of claim 1-3 service life long wear-resistant pipe preparation method, it is characterised in that in first material of S1, the weight ratio of W element and Cr element is 0.06～0.07:3.7～3.9.
5. according to described in any one of claim 1-4 service life long wear-resistant pipe preparation method, it is characterized in that, in S1, first material includes by weight percentage: C:0.9～1.0%, Si:0.48～0.52%, Mn:0.25～0.28%, Ni:0.13～0.14%, W:0.06～0.07%, Nb:0.16～0.17%, Zr:0.04～0.05%, Cr:3.7～3.9%, Ti:0.7～0.8%, Co:0.05～0.06%, Mo:0.14～0.15%, B:0.10～0.11%, Ce:0.16～0.17%, S≤0.02%, P≤0.02%, surplus is Fe.
6. according to described in any one of claim 1-5 service life long wear-resistant pipe preparation method, it is characterised in that in S3, K1Value be 2.6～2.8, K2Value be 6～8.
CN201610147637.2A 2016-03-15 2016-03-15 Preparation method for wear-resistant pipe long in service life Pending CN105779860A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107130087A (en) * 2017-05-31 2017-09-05 江苏金基特钢有限公司 A kind of Technology for Heating Processing for weakening austenitic stainless steel grain-boundary brittleness

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107130087A (en) * 2017-05-31 2017-09-05 江苏金基特钢有限公司 A kind of Technology for Heating Processing for weakening austenitic stainless steel grain-boundary brittleness
CN107130087B (en) * 2017-05-31 2019-02-12 江苏金基特钢有限公司 A kind of heat treatment process weakening austenitic stainless steel grain-boundary brittleness

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