CN101423916B - Low-alloy abrasion-proof and corrosion resistant steel and method for producing the same - Google Patents
Low-alloy abrasion-proof and corrosion resistant steel and method for producing the same Download PDFInfo
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Abstract
The invention relates to low alloy wearing resistance corrosion resistance steel which is suitably used in the ocean mud-sand wearing and corrosive environment, which is produced by the following steps: Mn-Si-Cr-Mo system non-carbide bainite alloy steel is taken as research basis, the carbon content and other alloy element contents are properly adjusted, elements of Al, Nb and rare earth contributing to improving the corrosion resistance of the alloy steel are added for modification, and the Mn-Si-Cr-Mo-Al system non-carbide bainite steel is formed by the progression quenching heat treatment process, so that the low alloy wearing resistance corrosion resistance steel is obtained. The steel has good obdurability, wearing resistant and corrosion resistant comprehensive performance and welding repair performances, and can be used to solve the problem of repairing worn blades of a centrifugal pump of a ship, and can also be applied to other ocean wearing resistance welding parts.
Description
One, technical field
The present invention relates to a kind of low alloy steel and manufacture method thereof, specifically relate to a kind of Mn-Si-Cr-Mo-Al series low-alloy wear-and corrosion-resistant steel and manufacture method thereof.
Two, background technology
Oceanographic engineering is one of importance of modern industry development, the briny environment complexity, and the snagboat bucket tooth of working in seawater for a long time, centrifugal blade etc. are subjected to high velocity flow to drive the effect of the shearing force of silt and workpiece surface formation, and corrosive wear is quite serious.The ocean is mainly carbon steel, low alloy steel and rich chromium cast iron with metallic substance at present.Problems such as these material ubiquity obdurabilities are not enough, wear-and corrosion-resistant over-all properties deficiency or REPAIR WELDING difficulty.
Because non-carbide bainitic steel has excellent comprehensive mechanical properties, has now become the main direction of studying of wear resisting steel, and has obtained many achievements in research with practical value.But these researchs mainly concentrate on the high-abrasive material of land wear working conditions such as metallurgy, mine, be that Mn-Si is main carbide-free Bainite wear-resisting alloy steel, to containing anti-corrosion element---the Mn-Si-Cr-Mo of chromium is that the research of carbide-free Bainite steel alloy is then less.In fact, Mn-Si-Cr-Mo is that non-carbide bainitic steel is the excellent material that a class has wear-resisting and anti-corrosion characteristic concurrently, has excellent research meaning and application prospect.
Ocean commonly used at present is austenitic stainless steel, ordinary low-carbon steel, low alloy steel and cast iron etc. with metallic substance.Though the austenitic stainless steel solidity to corrosion is good, yet its intensity hardness is generally lower, is difficult to use as wearing piece.Ordinary low-carbon steel then all has deficiency on intensity and solidity to corrosion, the rotten corrosion resisting property of cast iron materials is generally relatively poor, and there are problems such as REPAIR WELDING difficulty, the present development prospect of low alloy steel is better, obtain broad research, low alloy steel adds through alloying element and weave construction control, can improve intensity hardness greatly, improves solidity to corrosion simultaneously.Steel of the present invention promptly in the middle-low alloy steel scope, adds and thermal treatment process control by alloying element, obtains being suitable for the metallic substance that the ocean environment wearing piece uses.
Three, summary of the invention
Technical problem: the invention provides a kind of low-alloy abrasion-proof corrosion-resisting steel, solved that existing ocean is not enough with the ubiquitous obdurability of metallic substance, problems such as wear-and corrosion-resistant over-all properties deficiency and REPAIR WELDING difficulty.
Technical scheme:
The present invention is achieved through the following technical solutions:
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage: C:0.10%～0.16%; Si:1.0%～1.6%; Mn:0.8%～1.6%; Cr:1.0%～1.6%; Mo:0.3%～0.4%; Ni:0.3%～0.4%; Al:0.6%～1.0%; Rare earth+Nb :≤0.1%; Surplus is Fe.
The method for preparing the low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps: electrosmelting: the carbon steel virgin material advances high power electric arc furnace and smelts, add molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon successively, smelting tapping temperature is 1600～1620 ℃, obtains molten steel; The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C:0.10%～0.16%; Si:1.0%～1.6%; Mn:0.8%～1.6%; Cr:1.0%～1.6%; Mo:0.3%～0.4%; Ni:0.3%～0.4%; Al:0.6%～1.0%; Rare earth+Nb :≤0.1%; Surplus is Fe.Cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting; Thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
Beneficial effect:
The present invention is that the carbide-free Bainite steel alloy is the research basis with Mn-Si-Cr-Mo, suitably regulate carbon content and other alloying element contents, and adding helps to improve the corrosion proof element al of steel alloy, Nb, and the rotten processing of rare earth, by the marquenching thermal treatment process, forming Mn-Si-Cr-Mo-Al is non-carbide bainitic steel, thereby obtained a kind of low-alloy abrasion-proof corrosion-resisting steel that sea mud and sand erosion corrosion environment uses that is suitable for, this kind steel has better strength and toughness, wear-and corrosion-resistant over-all properties and REPAIR WELDING, can be used for solving the reparation problem of the frayed blade of steamer impeller pump, but also be expected to be used for other oceans with wear-resistant soldering part.
Specifically, low-alloy abrasion-proof corrosion-resisting steel of the present invention is compared with metallic substance with existing ocean, and its superiority is embodied in the following aspects:
At first, the low-alloy abrasion-proof corrosion-resisting steel carbon content that the present invention obtained is low, and its heterogeneous microstructure is meta-bainite, i.e. carbide-free Bainite after thermal treatment process.To be that Chinese scholar Kang Mo is mad propose in early eighties meta-bainite tissue (carbide-free Bainite), by add suppressing elements Si that carbide separates out, Al etc., carbide is separated out in the prevention steel, then form the weave construction of residual austenite film between rich carbon ferritic and voxel volume at the bainite transformation warm area, rich carbon ferritic intensity improves, and residual austenite has then been improved toughness of material.Simultaneously, through a large amount of evidences, other organize steel grade to improve greatly to the quasi-bainite steel weldability relatively.Steel grade of the present invention is by obtaining this tissue in the thermal treatment of bainite warm area isothermal.
Secondly, corrosion resisting property is superior: under low pressure conditions, steel alloy marine corrosion wear mechanism is based on corrosion loss, the present invention is by the compound interpolation of alloying element, make the product made from steel that finally obtains aspect sea water corrosion resistant, be better than common high-strength steel, under the low pressure environment, have better anticorrosive polishing machine.The effect that several elements compounding are added among the present invention is respectively:
1. chromium, the compound interpolation of aluminium: in steel, the effect of aluminium and silicon is similar, is non-carbide forming element, but its than the influence of silicon to steel a little less than.In addition, aluminium is good oxygen scavenger, but cleaning molten steel, refined cast structure.Sea water corrosion resistant for steel, Chinese scholar Guo Jin, Huang Yamin, woods such as repeatedly kicks at " low alloy steel is in the research of extra large water oxygen differential concentration corrosion " literary composition of delivering, according to the test-results of seawater hanging test data and Guo Jinnian etc. before, the composition analysis of seawater corrosion resistance steel grade is summed up, draw Cr, the compound interpolation of Al is more effective to improving the steel sea water corrosion resistant, the steel oxygen concentration currents that contains Cr＜1mass% (quality percentage composition) is bigger than carbon steel, and the Cr-Al steel is 1.5～2% o'clock anti-seawater local corrosion better performances at Cr content, and Cr content then causes local corrosion easily greater than 3mass%.The Al constituent content is to the seawater corrosion resistance effect of steel, also rest on the experimental study stage at present, still there is not final conclusion, yet the Al too high levels easily forms a large amount of refractory oxide in the castingprocesses, cause toughness of material to reduce, this steel contriver summarizes to the good low-alloy steel grade of sea water corrosion resistant, suitably improve Al content on the data with existing basis, to give full play to its anti-seawater corrosion effect, more suitable aluminium content is 0.6～1.0mass%.
2. manganese, the compound interpolation of niobium: the niobium of trace adds the stable infusible compound of formation in the steel, and hinder austenite crystal strongly and grow up, refined cast structure, all very favourable to the toughness plasticity and the fatigue strength that improve steel.Niobium steel charge-transfer resistance in the sea-water corrosion process prolongs with etching time and increases, and its sea water corrosion resistant is better than not conforming to the niobium steel.The compound interpolation of Mn, Nb is very beneficial to the sea water corrosion resistant that improves steel, the Mn element is significantly postponed the low alloy steel high-temperature zone and is changed, improve niobium solid solubility in austenite greatly, promote its uniform distribution, make the Nb element obtain bigger performance structure of steel and Effect on Performance effect.
In addition, the wear resisting property ideal of low alloy steel of the present invention: through the non-carbide bainitic steel that obtains behind the heat treatment step of the present invention, hardness reaches more than the HRC35, tensile strength reaches 1200MPa, meet the requirement of high-strength wearable steel, the wear resisting property test result is comparatively desirable with low alloy steel wearability test data contrast both at home and abroad, reaches international advanced wear-resistant low-alloy steel level.
Four, description of drawings
Fig. 1 is the heterogeneous microstructure synoptic diagram of wear-and corrosion-resistant steel of the present invention.
Fig. 2 carries out the sandstone abrasive grain wear test to sample, and when rotating speed was 1.79m/s, positive pressure was to the influence of abrasion loss under the different mill of the sample journey.
Fig. 3 carries out the sandstone abrasive grain wear test to sample, and when rotating speed was 2.45m/s, positive pressure was to the influence of abrasion loss under the different mill of the sample journey.
Fig. 4 carries out the sandstone abrasive grain wear test to sample, and when the wearing and tearing mileage was 16.105km, under the different rotating speeds, the sample abrasion loss was with the change curve of positive pressure.
Five, embodiment
Following description is to specify of the present invention, should not regard limitation of the invention as.
Embodiment 1
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage:
C:0.12%; Si:1.2%; Mn:0.8%; Cr:1.0%; Mo:0.3%; Ni:0.4%; Al:0.6%; Rare earth: 0.02%; Nb:0.08%; Surplus is Fe.
Prepare the method for above-mentioned low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps:
A. electrosmelting: adopt the high power electric arc furnace melting batch, during the melting 20% of carbon steel virgin material, add molybdenum-iron, nickel plate, ferro-niobium and low-carbon (LC) chromium, add part aluminium material during melting to 80%, after melting fully, sampling analysis, supply the aluminium amount, and adding ferromanganese (1620 ℃), ferrosilicon (1630 ℃), and rare earth ferrosilicon (1650 ℃) successively, lid slagging-off insulating covering agent is skimmed after the fusing respectively.Cool to 1600～1620 ℃, skim and come out of the stove, obtain molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C:0.12%; Si:1.2%; Mn:0.8%; Cr:1.0%; Mo:0.3%; Ni:0.4%; Al:0.6%; Rare earth: 0.02%; Nb:0.08%; Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting;
C. thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
Embodiment 2
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage:
C 0.16%; Si 1.6%; Mn 0.8%; Cr 1.6%; Mo 0.4%; Ni 0.4%; Al 0.6%; Rare earth 0.05%; Nb 0.04%; Surplus is Fe.
Prepare the method for above-mentioned low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps:
A. electrosmelting: adopt the high power electric arc furnace melting batch, during the melting 20% of carbon steel virgin material, add molybdenum-iron, nickel plate, ferro-niobium and low-carbon (LC) chromium, add part aluminium material during melting to 80%, after melting fully, sampling analysis, supply the aluminium amount, and adding ferromanganese (1620 ℃), ferrosilicon (1630 ℃), and rare earth ferrosilicon (1650 ℃) successively, lid slagging-off insulating covering agent is skimmed after the fusing respectively.Cool to 1600～1620 ℃, skim and come out of the stove, obtain molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C 0.16%; Si1.6%; Mn 0.8%; Cr 1.6%; Mo 0.4%; Ni 0.4%; Al 0.6%; Rare earth 0.05%; Nb 0.04%; Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting;
C. thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage:
C 0.15%; Si 1.6%; Mn 1.0%; Cr 1.0%; Mo 0.4%; Ni 0.3%; Al 1.0%; Rare earth: 0.03%; Nb:0.05%; Surplus is Fe.
Prepare the method for above-mentioned low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps:
A. electrosmelting: adopt the high power electric arc furnace melting batch, during the melting 20% of carbon steel virgin material, add molybdenum-iron, nickel plate, ferro-niobium and low-carbon (LC) chromium, add part aluminium material during melting to 80%, after melting fully, sampling analysis, supply the aluminium amount, and adding ferromanganese (1620 ℃), ferrosilicon (1630 ℃), and rare earth ferrosilicon (1650 ℃) successively, lid slagging-off insulating covering agent is skimmed after the fusing respectively.Cool to 1600～1620 ℃, skim and come out of the stove, obtain molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C 0.15%; Si1.6%; Mn 1.0%; Cr 1.0%; Mo 0.4%; Ni 0.3%; Al 1.0%; Rare earth 0.03%; Nb 0.05%; Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting;
C. thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage:
C 0.10%; Si 1.4%; Mn 1.2%; Cr 1.2%; Mo 0.4%; Ni 0.3%; Al 0.8%; Rare earth 0.06%; Nb 0.02%; Surplus is Fe.
Prepare the method for above-mentioned low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps:
A. electrosmelting: adopt the high power electric arc furnace melting batch, during the melting 20% of carbon steel virgin material, add molybdenum-iron, nickel plate, ferro-niobium and low-carbon (LC) chromium, add part aluminium material during melting to 80%, after melting fully, sampling analysis, supply the aluminium amount, and adding ferromanganese (1620 ℃), ferrosilicon (1630 ℃), and rare earth ferrosilicon (1650 ℃) successively, lid slagging-off insulating covering agent is skimmed after the fusing respectively.Cool to 1600～1620 ℃, skim and come out of the stove, obtain molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C 0.10%; Si 1.4%; Mn 1.2%; Cr 1.2%; Mo 0.4%; Ni 0.3%; Al 0.8%; Rare earth 0.06%; Nb 0.02%; Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting;
C. thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
Embodiment 5
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage:
C 0.15%; Si 1.4%; Mn 1.0%; Cr 1.6%; Mo 0.4%; Ni 0.3%; Al 0.8%; Rare earth 0.06%; Nb 0.02%; Surplus is Fe.
Prepare the method for above-mentioned low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps:
A. electrosmelting: adopt the high power electric arc furnace melting batch, during the melting 20% of carbon steel virgin material, add molybdenum-iron, nickel plate, ferro-niobium and low-carbon (LC) chromium, add part aluminium material during melting to 80%, after melting fully, sampling analysis, supply the aluminium amount, and adding ferromanganese (1620 ℃), ferrosilicon (1630 ℃), and rare earth ferrosilicon (1650 ℃) successively, lid slagging-off insulating covering agent is skimmed after the fusing respectively.Cool to 1600～1620 ℃, skim and come out of the stove, obtain molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C 0.15%; Si 1.4%; Mn 1.0%; Cr 1.6%; Mo 0.4%; Ni 0.3%; Al 0.8%; Rare earth 0.06%; Nb 0.02%; Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting;
C. thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
A kind of low-alloy abrasion-proof corrosion-resisting steel, the heterogeneous microstructure of this steel are carbide-free Bainite, and the chemical ingredients of this steel is by weight percentage:
C 0.14%; Si 1.2%; Mn 0.8%; Cr 1.4%; Mo 0.3%; Ni 0.4%; Al 0.6%; Rare earth 0.02%; Nb 0.07%; Surplus is Fe.
Prepare the method for above-mentioned low-alloy abrasion-proof corrosion-resisting steel, may further comprise the steps:
A. electrosmelting: adopt the high power electric arc furnace melting batch, during the melting 20% of carbon steel virgin material, add molybdenum-iron, nickel plate, ferro-niobium and low-carbon (LC) chromium, add part aluminium material during melting to 80%, after melting fully, sampling analysis, supply the aluminium amount, and adding ferromanganese (1620 ℃), ferrosilicon (1630 ℃), and rare earth ferrosilicon (1650 ℃) successively, lid slagging-off insulating covering agent is skimmed after the fusing respectively.Cool to 1600～1620 ℃, skim and come out of the stove, obtain molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage: C 0.14%; Si 1.2%; Mn 0.8%; Cr 1.4%; Mo 0.3%; Ni 0.4%; Al 0.6%; Rare earth 0.02%; Nb 0.07%; Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, casting;
C. thermal treatment process: will pour into a mould the as cast condition steel that obtains after the step behind 1000 ℃ of austenitizings, be that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel.
Embodiment 7
According to embodiment 2 gained structure of steel even compacts, heterogeneous microstructure is carbide-free Bainite (seeing accompanying drawing 1), and after tested, its hardness reaches more than the HRC35, and tensile strength reaches 1200MPa, and is wear-resisting, anti-corrosion and welding property is good.
The steel that embodiment 2 is made carries out the sandstone abrasive grain wear test, test-results such as accompanying drawing 2,3 and 4:
Testing installation: MLS-225 wet type rubber wheel grain-abrasion testing machine: Corrosive Impact Wear medium: quartz sand add water (quartz sand size is 20 orders, with the volume ratio of water be 4: 3, regulate pH ≈ 3); Rubber wheel rotating speed: 240r/min (being 2.45m/s).
Test-results: when positive pressure was 70N, the abrasion loss of mill journey 12km correspondence was 0.81g, and promptly the rate of wear is 65mg/km.
Correlation data: Sweden scholar Ann
Deng Wear behaviour ofsome low alloyed steels under combined impact/abrasion contact conditions one literary composition of on WEAR, delivering, studied the wear behaviour of several low alloy steel under the gouging abrasion condition, its carbon content is 0.061～0.2%, abrasive material is the grouan of 12～20mm size, about hardness 700HV, the about 0.1J of ballistic work, wearing-in period 60min, being converted into the mill journey is 1.357km, and abrasion loss is that 351～539mg (is that the rate of wear is 258～397mg/km).Wherein carbon content is that 0.17% low alloy steel is close with steel carbon content of the present invention, and the abrasion loss of this steel under this condition is 395mg, and promptly the rate of wear is 265mg/km.
But part thus, steel of the present invention just wear resisting property aspect are obviously excellent.
Embodiment 2 resulting wear-and corrosion-resistant steel in positive pressure hour, its rate of wear slows down with mill Cheng Zengjia; When positive pressure increased, abrasion loss was linear increase trend, and its rate of wear is determined jointly by positive pressure and rubber wheel rotating speed.Under the identical mill journey condition, the rubber wheel rotating speed is more little, and abrasion loss is big more.When accompanying drawing 3 is 16.105k m for the wearing and tearing mileage, under the different rotating speeds, the situation that the sample abrasion loss changes with positive pressure.
The wear-and corrosion-resistant steel of embodiment 2 gained, MPX-2000 type dish pin formula friction wear testing machine pin mill decrease test positive pressure 20N, the dry grinding of 180 order silicon carbide waterproof abrasive papers, and mill journey 312m, abrasion loss is 22mg; Mill journey 1560m, abrasion loss is 180mg.Positive pressure 30N mill journey 1000m under the lubricating condition, abrasion loss 43mg; Mill journey 5000m, abrasion loss 200mg.
Correlation data: rectifying adds " the High-Strength Low-Alloy air-colled bainite cast steel " literary composition that just waited deliver in 2006 on Jilin University's journal, several air-colled bainite cast steels are carried out wearing test, use ML-10 type pin disc type two body wear testing machines, No. 120 quartz water sand paper and sample are to mill, the mill journey is 10.409m, load is 7.84N, and carbon content is about 0.15% air-colled bainite cast steel, and abrasion loss is about 6mg.
By above contrast as can be known, steel of the present invention has more good wear resisting property.
Claims (1)
1. the manufacture method of a low-alloy abrasion-proof corrosion-resisting steel is characterized in that may further comprise the steps:
A. electrosmelting: the carbon steel virgin material advances high power electric arc furnace and smelts, and adds molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon in the smelting process successively, and smelting tapping temperature is 1600～1620 ℃, obtains molten steel;
The add-on of above-mentioned molybdenum-iron, nickel plate, ferro-niobium, low-carbon (LC) chromium, commercial-purity aluminium, ferromanganese, ferrosilicon, rare earth ferrosilicon meets the following conditions: make the chemical ingredients of resultant molten steel be by weight percentage:
C：0.10％～0.16％；
Si：1.0％～1.6％；
Mn：0.8％～1.6％；
Cr：1.0％～1.6％；
Mo：0.3％～0.4％；
Ni：0.3％～0.4％；
Al：0.6％～1.0％；
Rare earth+Nb :≤0.1%;
Surplus is Fe;
B. cast: carry out the molten steel cast, teeming temperature is 1610 ℃, and casting gets the as cast condition steel;
C. thermal treatment process: the as cast condition steel that obtains after the cast is that quenchant is cooled to 350 ℃ of insulations 1.5 hours with oil behind 1000 ℃ of austenitizings, takes out air cooling, obtains the low-alloy abrasion-proof corrosion-resisting steel, and the heterogeneous microstructure of this steel is a carbide-free Bainite.
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| CN102747299A (en) * | 2012-07-23 | 2012-10-24 | 西华大学 | High-performance bainite abrasion resistant steel for railway frog in alpine region and manufacture method |
| CN104152808B (en) * | 2014-08-24 | 2017-02-15 | 长兴德田工程机械股份有限公司 | Boron-containing high-silicon bainite wear-resistant corrosion-resistant alloy and manufacturing method thereof |
| CN108411203B (en) * | 2018-03-30 | 2019-11-29 | 湖南华菱涟源钢铁有限公司 | High-silicon high aluminium concrete mixer truck NM300 abrasion-resistant stee and production method |
| CN111074137A (en) * | 2019-12-24 | 2020-04-28 | 江苏骏茂新材料科技有限公司 | Method for manufacturing wear-resistant corrosion-resistant alloy |
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