CN103422007B - Preparation method of high temperature resistant and abrasion resistant alloy steel containing aluminum-boron-chromium - Google Patents
Preparation method of high temperature resistant and abrasion resistant alloy steel containing aluminum-boron-chromium Download PDFInfo
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Abstract
The invention discloses a preparation method of high temperature resistant and abrasion resistant alloy steel containing aluminum-boron-chromium. The preparation method of the high temperature resistant and abrasion resistant alloy steel containing aluminum-boron-chromium is characterized in that electric-furnace melting is adopted, components, by weight, 8-10% of ferroboron, 4-5% of metallic aluminum, 3-4% of nitrogen-bearing ferrochrome, 2.5-3.0% of ferrosilicon, 4-5% of medium carbon ferrochrome, 4-5% of high carbon ferrochrome and 69-73% of Q235 scrap steel are melted in an electric furnace, after molten steel enters a steel ladle, a wire feeder feeds alloy wires into the melted steel in the steel ladle, microalloying is conducted on the melted steel, then the melted steel is directly poured into a casting mould, the high temperature resistant and abrasion resistant alloy steel containing aluminum-boron-chromium is obtained, oil quenching and high-temperature tempering are conducted on the alloy steel, and the obtained alloy steel has good mechanical properties and high temperature resistant and abrasion resistant performance.
Description
Technical field
The invention discloses a kind of high temperature resistant abrasion steel alloy and preparation method thereof, particularly one is containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy and preparation method thereof, belongs to high-temperature material technical field.
Background technology
High temperature wear is a kind of extremely harsh wear working condition, high to material performance requirement, and not only require that material has excellent wear resistance, also require to have good antioxidant anticorrosive performance, traditional high-abrasive material is difficult to meet its service requirements.In order to improve the High-temperature-resandant andant wear-resistant ability of material, Chinese invention patent CN85100649 discloses ultrahigh-temperature abrasion-resistant cast nickel based alloy, this alloy has the advantages that under high temperature (>=1200 DEG C), keep high temperature abrasion resistance and oxidation-resistance, be applicable to manufacture high-temperature furnace part of rolling mill, especially ultrahigh-temperature worn parts.The alloying constituent (weight) preferentially selected is: chromium 30-35%, tungsten 10-15%, silicon 0.5-0.8%, manganese 0.4-0.8%, rare earth 0.1-0.2% or calcium 0.05-0.08%, carbon 0.40-0.50%, iron less than 5%, nickel 46-52%, and other is impurity.Chinese invention patent CN102978499A also discloses a kind of High-temperature-resandant andant wear-resistant Wimet of NiAl alloy epitaxy Binder Phase, and hard phase is WC and/TiC, and Binder Phase is Co and the/Fe of NiAl alloy epitaxy, and volume percent is 10 ~ 40%; Preparation technology comprises: by the component proportions of Ni-50at.%Al, 0.03 ~ 21.04wt% nickel powder and aluminium powder, mixes with carbide powder; Be placed in crystal vessel to pave, under non-oxidizing atmosphere, heat up and be heated to 660 ~ 1300 DEG C, insulation, then naturally cooling, obtain the mixture of carbide and NiAl; Mill, broken, sieve, obtain mixed powder; Deoxidation pre-treatment under the nitrogen atmosphere of 400 ± 50 DEG C; By the mixed powder of 45.77-96.34wt%, with Co and the/Fe powder wet-milling of surplus; Wet-milling compound spraying dry, compacting; Pressed compact 1350 ~ 1550 DEG C of low pressure liquid phase sinterings obtain High-temperature-resandant andant wear-resistant Wimet.But above-mentioned High-temperature-resandant andant wear-resistant material precious alloy add-on is many, expensive, applies difficulty.
On this basis, the process for treating surface of multiple High-temperature-resandant andant wear-resistant has been succeeded in developing again.Chinese invention patent CN102912339A discloses a kind of method that plasma-arc prepares high temperature wear resistant liner plate, its method steps comprises: the corrosion of removing metallic substrate surface, greasy dirt, oxide skin, according to metal base and working condition requirement, preparing metal base ceramic particle enhancement type powdered alloy, mixed powdered alloy is mixed with milky white adhesive, then the powdered alloy mixed evenly is brushed the surface at metal base, precoated layer thickness is 0.8 ~ 2mm, seasoning, the metal base closing layer with precoating is fixed on plasma-arc apparatus processing lathe, plasma arc carries out single-channel scanning to metallic substrate surface precoated layer, along with the movement of plasma arc, the cladding layer that cladding thickness is 0.3 ~ 1.5mm is obtained in the even cladding of metallic substrate surface.High temperature resistant composite liner prepared by this invention, has cost low, steady quality, is applicable to scale operation, can meets the needs of on-the-spot high temperature wear operating mode, effectively improves liner plate work-ing life.Chinese invention patent CN102912254A also discloses a kind of High temperature abrasion resistant guide plate, be composited by the bar-shaped wild phase of WC particle and high-chromium-nickel alloy matrix, macroscopically forming " honeycomb " shape structure, preparation method first prepares high-chromium-nickel alloy guide plate, then the blind hole be evenly alternately arranged is processed on high-chromium-nickel alloy guide plate work top layer, WC particle and Ni base solder are put into ball mill ball mill mixing, resol and dehydrated alcohol is added in compound, mix rear pressed compact granulation, then the powder of gained is inserted also compacting in the blind hole on high-chromium-nickel alloy guide plate work top layer, the high-chromium-nickel alloy guide plate of press-in powder is put into stoving oven dry, subsequently the high-chromium-nickel alloy guide plate of drying is put in vacuum oven or carries out in gas shield stove fusing soldering, then stove is chilled to room temperature, it is high that this invention guide plate has hardness, the feature of wear resistance and good in oxidation resistance.Chinese invention patent CN102909380A also discloses the method for the high temperature resistant composite liner of a kind of micro-metallurgy preparation, its method steps comprises: the corrosion of removing metallic substrate surface, greasy dirt, oxide skin impurity, according to metal base and working condition requirement, preparing metal base ceramic particle enhancement type powdered alloy mixes, mixed powdered alloy is mixed with milky white adhesive, then the powdered alloy mixed evenly is brushed the surface at metal base, after drying with Chinese ink by the blacking of alloy powder last layer, dry again, by semiconductor laser beam high density energy, ceramic on metal granule enhancement type powdered alloy and substrate surface metal is made to achieve quick micro-metallurgical reaction, at the refractory metal ceramic layer that metallic substrate surface acquisition and base material are 0.2 ~ 0.35mm thickness of metallurgical binding.The high temperature resistant composite liner of this invention, has cost low, steady quality, is applicable to scale operation, can meets the needs of on-the-spot high temperature wear special operation condition, effectively improves liner plate work-ing life.Chinese invention patent CN102744525A also discloses a kind of composite preparation process of high temperature wear resistant liner, first carries out pre-treatment to steel substrate surface, then by base material preheating; Then steel substrate is fixed on laser cladding equipment worktable; At steel substrate Laser Clad Ni-base Alloy superalloy powder; Carry out built-up welding on steel substrate laser cladding layer surface, finally, liner built-up welding completed carries out slow cooling.It is high that this invention compared with prior art has inner lining surface hardness, and overall flexibility is good, practical, and in conjunction with tight, technological operation is simple, flexible, the advantages such as cost is low, effective.Chinese invention patent CN102212820A also discloses a kind of preparation method of high-temperature-wear-resistant lining plate for coke pot for coke dry quenching, described high temperature wear resistant liner plate is deposited metals ceramic layer on metal backing, and it is prepared according to following step: (1) prepares mixed uniformly metal ceramic powder; (2) light absorption paint is evenly brushed at metallic backing surface; (3) after the coating of light absorption paint is dry, the method for pneumatic powder feeding is adopted, or paving powder mode, or the powder feeding of gravity automatic powder feeding system, powder layer thickness reaches 0.5 ~ 4.0mm; (4) metal ceramic powder that completed by high power laser scanning or conveying puts in place, metal backing is formed the high temperature wear resistant cermet coating of cladding.Adopt this invention to prepare dry quenched coke pot high temperature wear resistant metal backing, cost is low, and the quality of production is stablized, and implements conveniently, to be convenient to scale operation.Chinese invention patent CN1928155 also discloses a kind of alloy electroplating bath and treatment technology technique supporting with it, produce high-temperature corrosion resistance, the low cost of high temperature wear resistant performance, low power consuming, costly oil well pump, its objective is to manufacture at oil well pump, reparation field lowers high cost, highly energy-consuming to greatest extent.Concrete enforcement: nickelous chloride, Padil, aminoboranes, fluorographite, boric acid, soluble saccharin, lead ion etc. are weighed in proportion, the container putting into belt stirrer stirs, just can use after all dissolving.Plating solution is heated 40 ~ 60 DEG C when need plate, according to desired thickness determination plating time.Material is wherein, pure water: nickelous chloride: Padil: aminoboranes: fluorographite: boric acid: soluble saccharin: lead ion: ammoniacal liquor: sodium hydroxide=90: 3: 2.5: 0.45: 0.6: 3: 0.3: 0.003: 0.35: 0.15.Chinese invention patent CN1459514 also discloses the method preparing high temperature wear resistant coating, and the method carries out the preparation of coating by atom sediment; The microtexture of coating body part is controlled by electron beam or laser beam treatment; By ionic fluid etc. between technique coating and matrix, the combination between different coating.Adopt this technique can at hot work tools as surface-coated high temperature wear resistant coatings such as seamless steel tube production top, rolls.But the process for treating surface of above-mentioned High-temperature-resandant andant wear-resistant also exists composite bed and body material under high temperature wear complex working condition, easily to ftracture, peeling phenomenon, have a strong impact on workpiece work-ing life.
Summary of the invention
The present invention is directed to existing High-temperature-resandant andant wear-resistant material Problems existing, propose with aluminium, boron, chromium as main alloy element, exploitation is a kind of containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, in order to improve the mechanical property of this high temperature resistant abrasion steel alloy, in smelting molten steel process, add polynary microalloy by wire feeder, reach the object improving material property.
Object of the present invention can be realized by following measures:
The present invention is as follows containing the preparation method of aluminium-boron-chromium is high temperature resistant abrasion steel alloy: first by the ferro-boron of massfraction 8 ~ 10%, the metallic aluminium of 4 ~ 5%, the nitrided ferro-chromium of 3 ~ 4%, the ferrosilicon of 2.5 ~ 3.0%, the medium carbon ferrochrome of 4 ~ 5%, the high carbon ferro-chrome of 4 ~ 5% and the Q235 steel scrap of 69 ~ 73%, melt in electric furnace, when liquid steel temperature reaches 1600 ~ 1620 DEG C, molten steel to be come out of the stove to ladle, after molten steel all enters ladle, with wire feeder alloy wire is sent in the molten steel in ladle immediately, alloy wire distance ladle bottom 20 ~ 35mm.Alloy wire diameter
alloy wire add-on is 3.0 ~ 4.5% of steel quality mark in ladle.The chemical composition of alloy wire and massfraction thereof are 12 ~ 15%Ce, 6 ~ 8%Y, 15 ~ 18%Ca, 3 ~ 5%Ba, 3 ~ 5%Zr, 3 ~ 5%K, 8 ~ 10%Si, 3 ~ 5%Na, and surplus is Fe and inevitable trace impurity.When alloy wire all entered ladle after 6 ~ 8 minutes, molten steel is directly poured into casting mold, obtain casting containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, then by casting containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 1050 ~ 1080 DEG C with stove, be incubated after 2 ~ 4 hours, it is oil cooling 30 ~ 60 minutes in the oil sump of 60 ~ 100 DEG C in temperature, finally by after oil cooling containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 500 ~ 530 DEG C with stove, be incubated and come out of the stove air cooling to room temperature after 6 ~ 10 hours, obtain the steel alloy with excellent high-temperature abrasion resistant performance.
The chemical composition massfraction of ferro-boron as above is: 19.0 ~ 21.0%B ,≤0.5%C ,≤2%Si ,≤0.5%Al ,≤0.01%S ,≤0.1%P, surplus Fe.
The chemical composition massfraction of nitrided ferro-chromium as above is: 60 ~ 63%Cr, 5.0 ~ 6.5%N, C≤0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe.
The chemical composition massfraction of medium carbon ferrochrome as above is: the Cr of 60.0 ~ 65.0%, the C of 1.2 ~ 2.0%, the Si of 1.0 ~ 2.0%, and surplus is Fe.
The chemical composition massfraction of high carbon ferro-chrome as above is: the Cr of 62.0 ~ 68.0%, the C of 7.0 ~ 8.5%, the Si of 2.0 ~ 3.5%, and surplus is Fe.
The chemical composition massfraction of ferrosilicon as above is: the C of the Si of 72 ~ 80%, <0.2%, the S of≤0.02%, the P of≤0.04%, and surplus is Fe.
The chemical composition massfraction of Q235 steel scrap as above is: the C of 0.14 ~ 0.22%, the Mn of 0.30 ~ 0.65%, the Si of≤0.30%, the S of≤0.050%, the P of≤0.045%, and surplus is Fe.
In material of the present invention, first by the ferro-boron of massfraction 8 ~ 10%, the metallic aluminium of 4 ~ 5%, the nitrided ferro-chromium of 3 ~ 4%, the ferrosilicon of 2.5 ~ 3.0%, the medium carbon ferrochrome of 4 ~ 5%, the high carbon ferro-chrome of 4 ~ 5% and the Q235 steel scrap of 69 ~ 73%, melt in electric furnace, wherein add the ferro-boron of 8 ~ 10%, mainly utilize boron portion to enter matrix, improve hardening capacity and the hardenability of matrix, in addition, part of boron and iron, chromium react, and generate the Fe of high rigidity
2(B, C) and (Cr, Fe)
7(B, C)
3boron-carbide, is conducive to the abrasion resistance improving steel alloy.Add the metallic aluminium of 4 ~ 5% and the ferrosilicon of 2.5 ~ 3.0%, except playing desoxydatoin, mainly utilize aluminium, silicon enters matrix, improve metallic matrix high temperature resistance softening performance, be conducive to the high temperature abrasion resistance improving steel alloy, in addition, add the resistance of oxidation that ferrochrome is mainly used for improving steel, adding of nitrogen, be conducive to the hardening capacity improving steel alloy.On this basis, 12 ~ 15%Ce with wire feeder by massfraction, 6 ~ 8%Y, 15 ~ 18%Ca, 3 ~ 5%Ba, 3 ~ 5%Zr, 3 ~ 5%K, 8 ~ 10%Si, 3 ~ 5%Na, surplus is that Fe and inevitable trace impurity alloy wire are sent in the molten steel in ladle, alloy wire distance ladle bottom 20 ~ 35mm.Alloy wire diameter
alloy wire add-on is 3.0 ~ 4.5% of steel quality mark in ladle.Mainly utilize the alloying element in alloy wire, microalloy treatment is carried out to molten steel, reach purification and thinning solidification structure, improve steel inclusion form and distribution, particularly improve form and the distribution of boron-carbide, thus promote the raising of steel alloy mechanical property, last alloy steel carries out oil quenching and high tempering, mainly eliminate the ferrite and pearlite in as-cast structure, obtain the tempered martensite matrix of high rigidity, thus can further improve the high-temperature abrasion resistant ability of steel alloy.
The present invention compared with prior art, has the following advantages:
1) the present invention is containing in aluminium-boron-chromium is high temperature resistant abrasion steel alloy, not containing expensive alloy element such as expensive tungsten, molybdenum, cobalt, nickel, niobiums, has lower production cost.
2) containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy adopts castmethod to produce in the present invention, and efficiency is high, is easy to realize batch production.
3) containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy has excellent mechanical property in the present invention, and its hardness reaches 60 ~ 62HRC, and tensile strength reaches 750 ~ 850MPa, and impelling strength reaches 15 ~ 18J/cm
2, the high-temperature abrasion resistant performance performance at 500 DEG C is better than rich chromium cast iron, improves more than 35% than rich chromium cast iron (Cr20Mo2Cu1).
Embodiment
Below in conjunction with embodiment, the present invention is further described:
Embodiment 1
Containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy adopts 1000 kilograms of medium-frequency induction furnace meltings in the present invention.Preparation method is as follows: first by the ferro-boron of massfraction 8%, (ferro-boron chemical composition massfraction is: 19.0 ~ 21.0%B, ≤ 0.5%C, ≤ 2%Si, ≤ 0.5%Al, ≤ 0.01%S, ≤ 0.1%P, surplus Fe), the metallic aluminium of 5%, (nitrided ferro-chromium chemical composition massfraction is the nitrided ferro-chromium of 4%: 60 ~ 63%Cr, 5.0 ~ 6.5%N, C≤0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe), (ferro-silicon composition quality mark is the ferrosilicon of 2.5%: the Si of 72 ~ 80%, the C of <0.2%, the S of≤0.02%, the P of≤0.04%, surplus is Fe), (medium carbon ferrochrome chemical composition massfraction is the medium carbon ferrochrome of 4%: the Cr of 60.0 ~ 65.0%, the C of 1.2 ~ 2.0%, the Si of 1.0 ~ 2.0%, surplus is Fe), (high carbon ferro-chrome chemical composition massfraction is the high carbon ferro-chrome of 5%: the Cr of 62.0 ~ 68.0%, the C of 7.0 ~ 8.5%, the Si of 2.0 ~ 3.5%, surplus is Fe) and the Q235 steel scrap of 71.5% (the chemical composition massfraction of Q235 steel scrap is: the C of 0.14 ~ 0.22%, the Mn of 0.30 ~ 0.65%, the Si of≤0.30%, the S of≤0.050%, the P of≤0.045%, surplus is Fe), melt in electric furnace, when liquid steel temperature reaches 1603 DEG C, molten steel to be come out of the stove to ladle, after molten steel all enters ladle, with wire feeder alloy wire is sent in the molten steel in ladle immediately, alloy wire distance ladle bottom 20mm.Alloy wire diameter
alloy wire add-on is 3.0% of steel quality mark in ladle.The chemical composition of alloy wire and massfraction thereof are 12.05%Ce, 7.86%Y, 15.23%Ca, 4.99%Ba, 3.06%Zr, 3.1%K, 9.77%Si, 4.95%Na, and surplus is Fe and inevitable trace impurity.When alloy wire all entered ladle after 6.5 minutes, molten steel is directly poured into casting mold, obtain casting containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, then by casting containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 1050 DEG C with stove, be incubated after 4 hours, it is oil cooling 30 minutes in the oil sump of 65 DEG C in temperature, finally by after oil cooling containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 530 DEG C with stove, be incubated and come out of the stove air cooling to room temperature after 6 hours, obtain the steel alloy with excellent high-temperature abrasion resistant performance, its mechanical property is in table 1.
Embodiment 2
Containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy adopts 1000 kilograms of medium-frequency induction furnace meltings in the present invention.Preparation method is as follows: first by the ferro-boron of massfraction 10%, (ferro-boron chemical composition massfraction is: 19.0 ~ 21.0%B, ≤ 0.5%C, ≤ 2%Si, ≤ 0.5%Al, ≤ 0.01%S, ≤ 0.1%P, surplus Fe), the metallic aluminium of 4%, (nitrided ferro-chromium chemical composition massfraction is the nitrided ferro-chromium of 3%: 60 ~ 63%Cr, 5.0 ~ 6.5%N, C≤0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe), (ferro-silicon composition quality mark is the ferrosilicon of 3.0%: the Si of 72 ~ 80%, the C of <0.2%, the S of≤0.02%, the P of≤0.04%, surplus is Fe), (medium carbon ferrochrome chemical composition massfraction is the medium carbon ferrochrome of 5%: the Cr of 60.0 ~ 65.0%, the C of 1.2 ~ 2.0%, the Si of 1.0 ~ 2.0%, surplus is Fe), (high carbon ferro-chrome chemical composition massfraction is the high carbon ferro-chrome of 4%: the Cr of 62.0 ~ 68.0%, the C of 7.0 ~ 8.5%, the Si of 2.0 ~ 3.5%, surplus is Fe) and the Q235 steel scrap of 71% (the chemical composition massfraction of Q235 steel scrap is: the C of 0.14 ~ 0.22%, the Mn of 0.30 ~ 0.65%, the Si of≤0.30%, the S of≤0.050%, the P of≤0.045%, surplus is Fe), melt in electric furnace, when liquid steel temperature reaches 1618 DEG C, molten steel to be come out of the stove to ladle, after molten steel all enters ladle, with wire feeder alloy wire is sent in the molten steel in ladle immediately, alloy wire distance ladle bottom 35mm.Alloy wire diameter
alloy wire add-on is 4.5% of steel quality mark in ladle.The chemical composition of alloy wire and massfraction thereof are 14.94%Ce, 6.11%Y, 17.78%Ca, 3.01%Ba, 4.81%Zr, 4.90%K, 8.13%Si, 3.10%Na, and surplus is Fe and inevitable trace impurity.When alloy wire all entered ladle after 8 minutes, molten steel is directly poured into casting mold, obtain casting containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, then by casting containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 1080 DEG C with stove, be incubated after 2 hours, it is oil cooling 60 minutes in the oil sump of 90 DEG C in temperature, finally by after oil cooling containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 500 DEG C with stove, be incubated and come out of the stove air cooling to room temperature after 8 hours, obtain the steel alloy with excellent high-temperature abrasion resistant performance, its mechanical property is in table 1.
Embodiment 3
Containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy adopts 1000 kilograms of medium-frequency induction furnace meltings in the present invention.Preparation method is as follows: first by the ferro-boron of massfraction 9%, (ferro-boron chemical composition massfraction is: 19.0 ~ 21.0%B, ≤ 0.5%C, ≤ 2%Si, ≤ 0.5%Al, ≤ 0.01%S, ≤ 0.1%P, surplus Fe), the metallic aluminium of 4.5%, (nitrided ferro-chromium chemical composition massfraction is the nitrided ferro-chromium of 3.5%: 60 ~ 63%Cr, 5.0 ~ 6.5%N, C≤0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe), (ferro-silicon composition quality mark is the ferrosilicon of 2.8%: the Si of 72 ~ 80%, the C of <0.2%, the S of≤0.02%, the P of≤0.04%, surplus is Fe), (medium carbon ferrochrome chemical composition massfraction is the medium carbon ferrochrome of 4.5%: the Cr of 60.0 ~ 65.0%, the C of 1.2 ~ 2.0%, the Si of 1.0 ~ 2.0%, surplus is Fe), (high carbon ferro-chrome chemical composition massfraction is the high carbon ferro-chrome of 4.5%: the Cr of 62.0 ~ 68.0%, the C of 7.0 ~ 8.5%, the Si of 2.0 ~ 3.5%, surplus is Fe) and the Q235 steel scrap of 71.2% (the chemical composition massfraction of Q235 steel scrap is: the C of 0.14 ~ 0.22%, the Mn of 0.30 ~ 0.65%, the Si of≤0.30%, the S of≤0.050%, the P of≤0.045%, surplus is Fe), melt in electric furnace, when liquid steel temperature reaches 1612 DEG C, molten steel to be come out of the stove to ladle, after molten steel all enters ladle, with wire feeder alloy wire is sent in the molten steel in ladle immediately, alloy wire distance ladle bottom 25mm.Alloy wire diameter
alloy wire add-on is 3.5% of steel quality mark in ladle.The chemical composition of alloy wire and massfraction thereof are 13.04%Ce, 6.99%Y, 16.72%Ca, 4.11%Ba, 3.85%Zr, 3.92%K, 9.07%Si, 4.18%Na, and surplus is Fe and inevitable trace impurity.When alloy wire all entered ladle after 7 minutes, molten steel is directly poured into casting mold, obtain casting containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, then by casting containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 1060 DEG C with stove, be incubated after 3 hours, it is oil cooling 50 minutes in the oil sump of 80 DEG C in temperature, finally by after oil cooling containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 520 DEG C with stove, be incubated and come out of the stove air cooling to room temperature after 10 hours, obtain the steel alloy with excellent high-temperature abrasion resistant, its mechanical property is in table 1.
Table 1 is containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy mechanical property
Containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy has excellent mechanical property in the present invention, and its hardness reaches 60 ~ 62HRC, and tensile strength reaches 750 ~ 850MPa, and impelling strength reaches 15 ~ 18J/cm
2.High temperature wear test-results shows, and containing aluminium-boron-chromium is high temperature resistant, the high-temperature abrasion resistant performance performance of abrasion steel alloy at 500 DEG C is better than rich chromium cast iron in the present invention, improves more than 35% than rich chromium cast iron (Cr20Mo2Cu1).Containing aluminium-boron-chromium is high temperature resistant, abrasion steel alloy can be used for manufactures rolling mill guiding, deflector roll in the present invention, and the High-temperature-resandant andant wear-resistant parts such as pot galvanize dip-roll sleeve.Material of the present invention containing alloying elements such as expensive nickel, molybdenum, tungsten, vanadium, does not have good popularizing application prospect in high temperature wear field.
Claims (1)
1. the preparation method containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, it is characterized in that: adopt electrosmelting, first by the ferro-boron of massfraction 8 ~ 10%, the metallic aluminium of 4 ~ 5%, the nitrided ferro-chromium of 3 ~ 4%, the ferrosilicon of 2.5 ~ 3.0%, the medium carbon ferrochrome of 4 ~ 5%, the high carbon ferro-chrome of 4 ~ 5% and the Q235 steel scrap of 69 ~ 73%, in electric furnace, fusing obtains molten steel, when liquid steel temperature reaches 1600 ~ 1620 DEG C, molten steel to be come out of the stove to ladle, after molten steel all enters ladle, with wire feeder alloy wire is sent in the molten steel in ladle immediately, alloy wire distance ladle bottom 20 ~ 35mm, alloy wire diameter
alloy wire add-on is 3.0 ~ 4.5% of steel quality in ladle, the chemical composition of alloy wire and massfraction thereof are 12 ~ 15%Ce, 6 ~ 8%Y, 15 ~ 18%Ca, 3 ~ 5%Ba, 3 ~ 5%Zr, 3 ~ 5%K, 8 ~ 10%Si, 3 ~ 5%Na, and surplus is Fe and inevitable trace impurity, when alloy wire all entered ladle after 6 ~ 8 minutes, molten steel is directly poured into casting mold, obtain casting containing aluminium-boron-chromium is high temperature resistant abrasion steel alloy, then by casting containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 1050 ~ 1080 DEG C with stove, be incubated after 2 ~ 4 hours, be oil cooling 30 ~ 60 minutes in the oil sump of 60 ~ 100 DEG C in temperature, finally by after oil cooling containing aluminium-boron-chromium is high temperature resistant, and abrasion steel alloy is heated to 500 ~ 530 DEG C with stove, be incubated and come out of the stove air cooling to room temperature after 6 ~ 10 hours,
The chemical composition massfraction of ferro-boron is: 19.0 ~ 21.0%B ,≤0.5%C ,≤2%Si ,≤0.5%Al ,≤0.01%S ,≤0.1%P, surplus Fe;
The chemical composition massfraction of nitrided ferro-chromium is: 60 ~ 63%Cr, 5.0 ~ 6.5%N, C≤0.1%, Si≤2.5%, P≤0.03%, S≤0.04%, surplus Fe;
The chemical composition massfraction of medium carbon ferrochrome is: the Cr of 60.0 ~ 65.0%, the C of 1.2 ~ 2.0%, the Si of 1.0 ~ 2.0%, and surplus is Fe;
The chemical composition massfraction of high carbon ferro-chrome is: the Cr of 62.0 ~ 68.0%, the C of 7.0 ~ 8.5%, the Si of 2.0 ~ 3.5%, and surplus is Fe;
The chemical composition massfraction of ferrosilicon is: the C of the Si of 72 ~ 80%, <0.2%, the S of≤0.02%, the P of≤0.04%, and surplus is Fe;
The chemical composition massfraction of Q235 steel scrap is: the C of 0.14 ~ 0.22%, the Mn of 0.30 ~ 0.65%, the Si of≤0.30%, the S of≤0.050%, the P of≤0.045%, and surplus is Fe.
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| CN103741043B (en) * | 2013-12-19 | 2015-12-30 | 马鞍山市方圆材料工程有限公司 | A kind of boron-containing roller alloy steel material and preparation method thereof |
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