CN104630640A - Liquid-zinc-corrosive-wear-resistant monolithic material and preparation method thereof - Google Patents
Liquid-zinc-corrosive-wear-resistant monolithic material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
Abstract
The invention relates to a liquid-zinc-corrosive-wear-resistant monolithic material and a preparation method thereof. The material has a double-phase structure composed of a network Fe2B anticorrosion phase and a ferritic matrix, wherein the ferritic matrix is distributed in the network structure of the network Fe2B anticorrosion phase. The monolithic material is composed of the following components in percentage by mass: 0.2-0.25% of C, 3-3.5% of B, 0.6-0.8% of Cr, 0.6-0.8% of Si, 0-0.035% of S, 0-0.035% of P and the balance of Fe. The preparation method comprises the following steps: mixing steel scrap, chromium iron and pure iron, melting by heating to obtain molten steel, mixing and melting boron iron and the molten steel to obtain molten steel, pouring the molten steel into a sand mold, and carrying out monoblock casting to obtain the material. The production technique is simple; the prepared liquid-zinc-corrosive-wear-resistant monolithic material has high hardness and excellent use effect; the liquid zinc corrosive-wear resistance in the liquid zinc is 15-26 times of that of 316L stainless steel; and thus, the liquid-zinc-corrosive-wear-resistant monolithic material has favorable application prospects.
Description
Technical field
The invention belongs to material corrosion and abrasion techniques field, be specifically related to a kind of molten zinc corrosion resistant wearing and tearing integral material and preparation method thereof.
Background technology
The loss that the corrosion of ferrous materials brings to national economy is very surprising.According to statistics, the weight of the annual steel product lost efficacy because of corrosion is about equivalent to 1/3rd of metal annual production in the world.Thus effective anti-corrosion method is significant for saving energy and reduce the cost, boosting economic growth.Hot dip galvanizing process be at present in the world in steel anti-corrosive etching method the most substantially, the most ancient, one of method the most widely.Hot pure zinc plating (GI, galvanized) plating piece matrix and extraneous ionogen can be kept apart by product and alloying (GA, galvannealed) product effectively thereof, make plating piece from electrolytical corrosion, thus have excellent corrosion resisting property, cost is also relatively low simultaneously.And along with the progress of Hot Galvanizing Technology, its product surface quality almost can compare favourably with electro-galvanized steel sheet, and seldom there is problem of environmental pollution, thus obtains on automobile and applies widely.At present, Japanese car all adopts hot-dip galvanizing sheet steel to do outside plate substantially, particularly automobile exterior panel is demand is ever-increasing while, more and more higher requirement be it is also proposed to aspects such as the surface quality of pot galvanize product and plasticities, just this market demands improve constantly the progress facilitating band steel continuous temperature zinc technology technology widely.
The strip hot-dip galvanizing unit that current countries in the world iron and steel enterprise runs mostly adopts sinking roller device, and it is primarily of compositions such as the sinking roller be arranged in zinc liquid, stabilizing roller and air knives.The sinking roller rotated with the motion of steel band is supported on anchor by the axle sleeve of both sides, and axle sleeve plays sliding surface bearing.The material, axle sleeve that Present Domestic continuous galvanizing line uses comprises the material such as cobalt base alloy Stellite 6B and 316L stainless steel, and use on the machine 7 ~ 14 days rear surfaces and destroy serious, sinking roller is changed frequent, affects temperature zinc and produces.Chinese invention patent CN 101748354 A discloses the spraying method of a kind of corrosion resistance to zinc liquid wearing and tearing compound coating.First spray WC-Co powder body material coating as prime coat, prime coat thickness 0.15 ~ 0.20mm, then spray MoB-Co powder body material coating as working lining, working lining thickness is 0.07 ~ 0.10mm; This compound coating overcomes the defect of single coating, makes the resisting corrosive wear of zinc solution of each base part and practical life obtain effective raising.The anti-liquid zinc corrosion of the minority refractory metal (W, Mo alloy) in this invention is effective, but because cost is high, not easily process, oxidizable, in zinc-plated industry, apply difficulty.Chinese invention patent CN 101215671A discloses the cast moulding method of a kind of molten zinc corrosion resistant wearing and tearing boron steel, and the boron steel prepared by this invention, makes the resisting corrosive wear of zinc solution of each base part obtain larger raising.But B element too high levels in this invention, causes in cast form process, form a large amount of nascent Fe
2b phase.In material military service process, nascent Fe
2b phase easily monoblock is peeled off, thus reduces the work-ing life of material to a certain extent.In this invention, Cr, the Mo of high-content, W alloy element add manufacturing cost simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of molten zinc corrosion resistant wearing and tearing integral material and preparation method thereof, this material has excellent molten zinc corrosion resistant polishing machine, with the sinking roller of this material fabricated ribbon steel continuous galvanizing line, the work-ing life of sinking roller can be increased substantially.
For achieving the above object, the technical solution used in the present invention is:
A kind of molten zinc corrosion resistant wearing and tearing integral material, this material has by netted Fe
2the B duplex structure formed with ferrite matrix against corrosion, wherein ferrite matrix is distributed in netted Fe
2in the reticulated structure of B phase against corrosion; By percentage to the quality, the composition of this material is:
Netted Fe in this material
2the percent by volume of B phase against corrosion is 42 ~ 48%.
Described netted Fe
2the microhardness of B phase against corrosion is 1500 ~ 1700Hv.
The hardness of this material is 45 ~ 55HRC, and resisting corrosive wear of zinc solution performance is stainless 15 ~ 26 times of 316L.
This material is in the zinc liquid of 460 DEG C, and loaded load 30 ~ 50N, after the rotating speed corrosive wear 4h of 60 ~ 100rpm/min, its material unaccounted-for (MUF) speed (volume corrosive wear rate) is 0.83 × 10
-3mm
3/ m ~ 1.79 × 10
-3mm
3/ m.
The preparation method of molten zinc corrosion resistant wearing and tearing integral material, comprises the following steps:
1) consumption of ferro-boron, steel scrap, ferrochrome and pure iron is calculated according to the mass percent of each composition;
2) steel scrap, ferrochrome and pure iron are mixed, heat fused becomes molten steel, adds reductor and carries out deoxidation, then pour in casting ladle by molten steel in molten steel;
3) ferro-boron is put into electric furnace, then the molten steel in casting ladle is poured in electric furnace, be warming up to ferro-boron and melt completely, obtain molten steel;
4) in molten steel, add reductor and carry out deoxidation, then come out of the stove and pour in sand mold, pour into a mould after 5 ~ 10 hours and cool, obtain foundry goods, Mechanical processing of casting is become designated shape and size, namely obtain molten zinc corrosion resistant wearing and tearing integral material.
Described step 2) in when liquid steel temperature is 1550 ~ 1600 DEG C, molten steel is poured in casting ladle after deoxidation.
Described step 2) in reductor be aluminium wire, the quality of the reductor added is 0.10% ~ 0.20% of steel quality.
Described step 3) in reductor be aluminium wire, the quality of the reductor added is 0.10% ~ 0.20% of quality of molten steel.
Described step 4) in the tapping temperature of molten steel be 1550 ~ 1600 DEG C, teeming temperature is 1420 ~ 1460 DEG C.
Relative to prior art, beneficial effect of the present invention is:
Molten zinc corrosion resistant wearing and tearing integral material provided by the invention, has unique duplex structure (netted Fe
2b phase+ferrite matrix against corrosion), wherein netted Fe
2b is against corrosion has high microhardness mutually, can significantly improve steel resisting corrosive wear of zinc solution ability at relatively high temperatures, simultaneously due to the nonwetting property of itself and zinc liquid, significantly can improve the liquid zinc corrosion resistant performance of material.Ferrite matrix has good toughness, obviously can increase the overall flexibility of material.Ferrite matrix is distributed in netted Fe
2in the reticulated structure of B phase against corrosion, not only both effects of cooperatively interacting, improve the hardness of material but also strengthen the toughness of material, make material monolithic have excellent molten zinc corrosion resistant wear resistance.With the sinking roller of molten zinc corrosion resistant wearing and tearing integral material fabricated ribbon steel continuous galvanizing line provided by the invention, the work-ing life of sinking roller can be increased substantially, there is good market application foreground.
Further, molten zinc corrosion resistant wearing and tearing integral material hardness provided by the invention is high, and hardness of cast form reaches 45 ~ 55HRC.Through continous way corrosive wear measuring, the resisting corrosive wear of zinc solution performance of molten zinc corrosion resistant wearing and tearing integral material provided by the invention in zinc liquid is stainless 15 ~ 26 times of traditional 316L.
The preparation method of molten zinc corrosion resistant wearing and tearing integral material provided by the invention, utilize electrosmelting and adopt castmethod to be shaped, namely first steel scrap, ferrochrome and pure iron are mixed, heat fused becomes molten steel, again ferro-boron and mixing of molten steel are melted, obtain molten steel, molten steel is poured in sand mold and carry out monoblock casting, molten zinc corrosion resistant wearing and tearing integral material can be obtained.Ferro-boron does not directly melt by the present invention in preparation process together with other raw material, but first other raw material is melted into molten steel, again ferro-boron is melted in molten steel, the abundant thawing of ferro-boron can be ensured like this, thus ensure that casting the material obtained can generate netted Fe
2the two-phase structure of B phase+ferrite matrix against corrosion, guarantees that the integral material obtained has excellent molten zinc corrosion resistant wear resistance.And the present invention adopts casting to prepare integral material, the corresponding sand mold of the shape and size of required integral material only need be got out, can one-step casting be shaping obtains product, be suitable for the production of large size material.And production technique of the present invention is easy, adopts existing steel making equipment to produce, be suitable for industrialized production, have a good application prospect.
Accompanying drawing explanation
Fig. 1 is the metallographic shape appearance figure of the molten zinc corrosion resistant wearing and tearing integral material that the embodiment of the present invention 1 obtains.
Embodiment
Molten zinc corrosion resistant wearing and tearing integral material provided by the invention, has by netted Fe
2the B duplex structure formed with ferrite matrix against corrosion, wherein ferrite matrix is distributed in netted Fe
2in the reticulated structure of B phase against corrosion, netted Fe
2the microhardness of B phase against corrosion is 1500 ~ 1700Hv.Netted Fe in this material
2the percent by volume of B phase against corrosion is 42 ~ 48%.
By percentage to the quality, the composition of molten zinc corrosion resistant wearing and tearing integral material provided by the invention is: C:0.20 ~ 0.25%; B:3.00 ~ 3.50%; Cr:0.60 ~ 0.80%; Si:0.60 ~ 0.80%; S:0 ~ 0.035%; P:0 ~ 0.035%; Fe: surplus.
The hardness of molten zinc corrosion resistant wearing and tearing integral material provided by the invention is 45 ~ 55HRC, and in the zinc liquid of 460 DEG C, loaded load 30 ~ 50N, after the rotating speed corrosive wear 4h of 60 ~ 100rpm/min, its material unaccounted-for (MUF) speed is 0.83 × 10
-3mm
3/ m ~ 1.79 × 10
-3mm
3/ m, its resisting corrosive wear of zinc solution performance is stainless 15 ~ 26 times of 316L.
Molten zinc corrosion resistant wearing and tearing integral material electric furnace provided by the invention is produced, and its processing step is:
Steel scrap, ferrochrome, pure iron Hybrid Heating are fused into molten steel; Add the aluminium wire deoxidation of steel quality 0.10% ~ 0.20% after stokehold adjusting component is qualified, temperature is risen to 1550 ~ 1600 DEG C, then molten steel is poured in pre-prepd casting ladle; Then, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is poured in induction furnace, heat up, treat that ferro-boron melts completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.10% ~ 0.20% again carries out deoxidation, come out of the stove for 1550 ~ 1600 DEG C, leave standstill 30 seconds, skim.Molten zinc corrosion resistant wearing and tearing integral material adopts castmethod shaping, and poured into by molten steel in sand mold, molten steel teeming temperature is 1420 ~ 1460 DEG C; Pour into a mould unpacking air cooling foundry goods after 5 ~ 10 hours, destroy rising head, cleaning undesirable root, overlap, burr; Then carry out sand removal, roughing, be refined to the shape and size of regulation, namely obtain molten zinc corrosion resistant wearing and tearing integral material.
In order to further illustrate the present invention, below in conjunction with embodiment, the preparation method to molten zinc corrosion resistant wearing and tearing integral material provided by the invention is described in detail.
Embodiment 1
First, determine that the chemical composition of molten zinc corrosion resistant wearing and tearing integral material for (mass percent) is: 0.20wt.%C, 3.50wt.%B, 0.60wt.%Cr, 0.60wt.%Si, S≤0.035wt%, P≤0.035wt%, surplus is Fe.Batching gross weight is 10Kg.Calculate and above-mentioned materials melting of weighing starting material used: ferro-boron, low carbon ferrochromium, steel scrap, pure iron are prepared burden.
Then, steel scrap is heated in the medium-frequency induction furnace of 10Kg 1500 DEG C of fusings, adds low carbon ferrochromium, pure iron successively, be fused into molten steel, adopt the aluminium wire of steel quality 0.15% carry out deoxidation and remove the gred at liquid steel level.When liquid steel temperature reaches 1600 DEG C, molten steel is poured in pre-prepd casting ladle, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is returned into induction furnace, be warming up to ferro-boron to melt completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.15% again carries out deoxidation, then molten steel is come out of the stove at 1600 DEG C, poured into when molten steel is cooled to 1460 DEG C in pre-prepd sand mold, unpacking air cooling foundry goods after pouring 8 hours, take out sample, destroy rising head, cleaning undesirable root, overlap, burr, sample from as-cast specimen according to the size specified and shape, carry out roughing and precision work, obtain molten zinc corrosion resistant wearing and tearing integral material.
Fig. 1 is the metallographic shape appearance figure of the molten zinc corrosion resistant wearing and tearing integral material that embodiment 1 obtains, and as can be seen from the figure defines by netted Fe
2the B duplex structure formed with ferrite (Ferrite) matrix against corrosion, and ferrite matrix is evenly distributed on netted Fe
2in the reticulated structure of B phase against corrosion.
Consider that in current continuous hot galvanizing production unit, the component materials such as rod class, axle sleeve select 316L stainless steel usually.Therefore, in the test of test wear performance, reference material selects 316L stainless steel.316L stainless steel sample is in 460 DEG C of zinc liquid, and loaded load 50N, corrosive wear machine rotating speed 60rpm/min, corrosive wear 4h, the material unaccounted-for (MUF) speed caused because of corrosive wear is 27.27 × 10
-3mm
3/ m.The molten zinc corrosion resistant wearing and tearing integral material that embodiment 1 obtains is under identical parameters condition, and the material unaccounted-for (MUF) speed caused because of corrosive wear is only 1.79 × 10
-3mm
3/ m.Compare 316L stainless steel, the anti-corrosion wear performance raising of the molten zinc corrosion resistant wearing and tearing integral material that embodiment 1 is obtained is about 15.23 times.
Embodiment 2
First, determine that the chemical composition of molten zinc corrosion resistant wearing and tearing integral material for (mass percent) is: 0.20wt.%C, 3.50wt.%B, 0.60wt.%Cr, 0.60wt.%Si, S≤0.035wt%, P≤0.035wt%, surplus is Fe.Batching gross weight is 10Kg.Calculate and above-mentioned materials melting of weighing starting material used: ferro-boron, low carbon ferrochromium, steel scrap, pure iron are prepared burden.
Then, steel scrap is heated in the medium-frequency induction furnace of 10Kg 1500 DEG C of fusings, adds low carbon ferrochromium, pure iron successively, be fused into molten steel, adopt the aluminium wire of steel quality 0.15% carry out deoxidation and remove the gred at liquid steel level.When liquid steel temperature reaches 1560 DEG C, molten steel is poured in pre-prepd casting ladle, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is returned into induction furnace, be warming up to ferro-boron to melt completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.15% again carries out deoxidation, then molten steel is come out of the stove at 1550 DEG C, poured into when molten steel is cooled to 1420 DEG C in pre-prepd sand mold, unpacking air cooling foundry goods after pouring 7 hours, take out sample, destroy rising head, cleaning undesirable root, overlap, burr, sample from as-cast specimen according to the size specified and shape, carry out roughing and precision work, obtain molten zinc corrosion resistant wearing and tearing integral material.
Due in actual continuous hot galvanizing production unit, 316 stainless steels selected usually by rod base part material.Therefore, in polishing machine experimental test, reference material selects 316L stainless steel.316L stainless steel sample is in 460 DEG C of zinc liquid, and loaded load 30N, corrosive wear machine rotating speed 60rpm/min, corrosive wear 4h, corrosion wear rate is 21.87 × 10
-3mm
3/ m.And molten zinc corrosion resistant wearing and tearing integral material prepared by embodiment 2 is under identical parameters condition, corrosion wear rate is only 0.83 × 10
-3mm
3/ m.Compare 316L stainless steel, the anti-corrosion wear performance of molten zinc corrosion resistant wearing and tearing integral material prepared by embodiment 2 improves 26.35 times.
Embodiment 3
First, determine that the chemical composition of molten zinc corrosion resistant wearing and tearing integral material for (mass percent) is: 0.20wt.%C, 3.50wt.%B, 0.60wt.%Cr, 0.60wt.%Si, S≤0.035wt%, P≤0.035wt%, surplus is Fe.Batching gross weight is 10Kg.Calculate and above-mentioned materials melting of weighing starting material used: ferro-boron, low carbon ferrochromium, steel scrap, pure iron are prepared burden.
Then, steel scrap is heated in the medium-frequency induction furnace of 10Kg 1500 DEG C of fusings, adds low carbon ferrochromium, pure iron successively, be fused into molten steel, adopt the aluminium wire of steel quality 0.12% carry out deoxidation and remove the gred at liquid steel level.When liquid steel temperature reaches 1570 DEG C, molten steel is poured in pre-prepd casting ladle, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is returned into induction furnace, be warming up to ferro-boron to melt completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.18% again carries out deoxidation, then molten steel is come out of the stove at 1580 DEG C, poured into when molten steel is cooled to 1440 DEG C in pre-prepd sand mold, unpacking air cooling foundry goods after pouring 6 hours, take out sample, destroy rising head, cleaning undesirable root, overlap, burr, sample from as-cast specimen according to the size specified and shape, carry out roughing and precision work, obtain molten zinc corrosion resistant wearing and tearing integral material.
Due in actual continuous hot galvanizing production unit, 316 stainless steels selected usually by rod base part material.Therefore in polishing machine test, with 316L stainless steel as reference material.316L stainless steel sample in 460 DEG C of zinc liquid, loaded load 30N, corrosive wear machine rotating speed 100rpm/min, after corrosive wear 4h, the material unaccounted-for (MUF) speed caused because of corrosive wear is 26.58 × 10
-3mm
3/ m.Molten zinc corrosion resistant wearing and tearing integral material prepared by embodiment 3 is under identical parameters condition, and the material unaccounted-for (MUF) speed caused because of corrosive wear is only 1.73 × 10
-3mm
3/ m.Compare 316L stainless steel, the anti-corrosion wear performance of molten zinc corrosion resistant wearing and tearing integral material prepared by embodiment 3 improves 15.36 times.
Embodiment 4
First, determine that the chemical composition of molten zinc corrosion resistant wearing and tearing integral material for (mass percent) is: 0.25wt.%C, 3wt.%B, 0.80wt.%Cr, 0.80wt.%Si, S=0wt%, P=0wt%, surplus is Fe.Batching gross weight is 10Kg.Calculate and above-mentioned materials melting of weighing starting material used: ferro-boron, low carbon ferrochromium, steel scrap, pure iron are prepared burden.
Then, steel scrap is heated in the medium-frequency induction furnace of 10Kg 1500 DEG C of fusings, adds low carbon ferrochromium, pure iron successively, be fused into molten steel, adopt the aluminium wire of steel quality 0.2% carry out deoxidation and remove the gred at liquid steel level.When liquid steel temperature reaches 1550 DEG C, molten steel is poured in pre-prepd casting ladle, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is returned into induction furnace, be warming up to ferro-boron to melt completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.1% again carries out deoxidation, then molten steel is come out of the stove at 1570 DEG C, poured into when molten steel is cooled to 1430 DEG C in pre-prepd sand mold, unpacking air cooling foundry goods after pouring 5 hours, take out sample, destroy rising head, cleaning undesirable root, overlap, burr, sample from as-cast specimen according to the size specified and shape, carry out roughing and precision work, obtain molten zinc corrosion resistant wearing and tearing integral material.
Embodiment 5
First, determine that the chemical composition of molten zinc corrosion resistant wearing and tearing integral material for (mass percent) is: 0.22wt.%C, 3.20wt.%B, 0.70wt.%Cr, 0.70wt.%Si, S≤0.02wt%, P≤0.02wt%, surplus is Fe.Batching gross weight is 10Kg.Calculate and above-mentioned materials melting of weighing starting material used: ferro-boron, low carbon ferrochromium, steel scrap, pure iron are prepared burden.
Then, steel scrap is heated in the medium-frequency induction furnace of 10Kg 1500 DEG C of fusings, adds low carbon ferrochromium, pure iron successively, be fused into molten steel, adopt the aluminium wire of steel quality 0.1% carry out deoxidation and remove the gred at liquid steel level.When liquid steel temperature reaches 1580 DEG C, molten steel is poured in pre-prepd casting ladle, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is returned into induction furnace, be warming up to ferro-boron to melt completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.2% again carries out deoxidation, then molten steel is come out of the stove at 1590 DEG C, poured into when molten steel is cooled to 1450 DEG C in pre-prepd sand mold, unpacking air cooling foundry goods after pouring 10 hours, take out sample, destroy rising head, cleaning undesirable root, overlap, burr, sample from as-cast specimen according to the size specified and shape, carry out roughing and precision work, obtain molten zinc corrosion resistant wearing and tearing integral material.
Embodiment 6
First, determine that the chemical composition of molten zinc corrosion resistant wearing and tearing integral material for (mass percent) is: 0.23wt.%C, 3.30wt.%B, 0.75wt.%Cr, 0.65wt.%Si, S≤0.01wt%, P≤0.01wt%, surplus is Fe.Batching gross weight is 10Kg.Calculate and above-mentioned materials melting of weighing starting material used: ferro-boron, low carbon ferrochromium, steel scrap, pure iron are prepared burden.
Then, steel scrap is heated in the medium-frequency induction furnace of 10Kg 1500 DEG C of fusings, adds low carbon ferrochromium, pure iron successively, be fused into molten steel, adopt the aluminium wire of steel quality 0.18% carry out deoxidation and remove the gred at liquid steel level.When liquid steel temperature reaches 1590 DEG C, molten steel is poured in pre-prepd casting ladle, the ferro-boron of drying in advance is put into medium-frequency induction furnace, again the molten steel previously pouring casting ladle into is returned into induction furnace, be warming up to ferro-boron to melt completely, obtain molten steel, the aluminium wire adding quality of molten steel 0.12% again carries out deoxidation, then molten steel is come out of the stove at 1560 DEG C, poured into when molten steel is cooled to 1450 DEG C in pre-prepd sand mold, unpacking air cooling foundry goods after pouring 9 hours, take out sample, destroy rising head, cleaning undesirable root, overlap, burr, sample from as-cast specimen according to the size specified and shape, carry out roughing and precision work, obtain molten zinc corrosion resistant wearing and tearing integral material.
Claims (10)
1. a molten zinc corrosion resistant wearing and tearing integral material, is characterized in that: this material has by netted Fe
2the B duplex structure formed with ferrite matrix against corrosion, wherein ferrite matrix is distributed in netted Fe
2in the reticulated structure of B phase against corrosion; By percentage to the quality, the composition of this material is:
2. molten zinc corrosion resistant wearing and tearing integral material according to claim 1, is characterized in that: netted Fe in this material
2the percent by volume of B phase against corrosion is 42 ~ 48%.
3. molten zinc corrosion resistant wearing and tearing integral material according to claim 1, is characterized in that: described netted Fe
2the microhardness of B phase against corrosion is 1500 ~ 1700Hv.
4. molten zinc corrosion resistant wearing and tearing integral material according to claim 1, it is characterized in that: the hardness of this material is 45 ~ 55HRC, resisting corrosive wear of zinc solution performance is stainless 15 ~ 26 times of 316L.
5. molten zinc corrosion resistant wearing and tearing integral material according to claim 1, is characterized in that: this material is in the zinc liquid of 460 DEG C, and loaded load 30 ~ 50N, after the rotating speed corrosive wear 4h of 60 ~ 100rpm/min, its material unaccounted-for (MUF) speed is 0.83 × 10
-3mm
3/ m ~ 1.79 × 10
-3mm
3/ m.
6. the preparation method of the molten zinc corrosion resistant wearing and tearing integral material in claim 1-5 described in any one, is characterized in that, comprise the following steps:
1) consumption of ferro-boron, steel scrap, ferrochrome and pure iron is calculated according to the mass percent of each composition;
2) steel scrap, ferrochrome and pure iron are mixed, heat fused becomes molten steel, adds reductor and carries out deoxidation, then pour in casting ladle by molten steel in molten steel;
3) ferro-boron is put into electric furnace, then the molten steel in casting ladle is poured in electric furnace, be warming up to ferro-boron and melt completely, obtain molten steel;
4) in molten steel, add reductor and carry out deoxidation, then come out of the stove and pour in sand mold, pour into a mould after 5 ~ 10 hours and cool, obtain foundry goods, Mechanical processing of casting is become designated shape and size, namely obtain molten zinc corrosion resistant wearing and tearing integral material.
7. the preparation method of molten zinc corrosion resistant according to claim 6 wearing and tearing integral material, is characterized in that: described step 2) in when liquid steel temperature is 1550 ~ 1600 DEG C, molten steel is poured in casting ladle after deoxidation.
8. the preparation method of molten zinc corrosion resistant according to claim 6 wearing and tearing integral material, is characterized in that: described step 2) in reductor be aluminium wire, the quality of the reductor added is 0.10% ~ 0.20% of steel quality.
9. the preparation method of molten zinc corrosion resistant according to claim 6 wearing and tearing integral material, is characterized in that: described step 3) in reductor be aluminium wire, the quality of the reductor added is 0.10% ~ 0.20% of quality of molten steel.
10. the preparation method of molten zinc corrosion resistant according to claim 6 wearing and tearing integral material, is characterized in that: described step 4) in the tapping temperature of molten steel be 1550 ~ 1600 DEG C, teeming temperature is 1420 ~ 1460 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105734430A (en) * | 2016-03-31 | 2016-07-06 | 湘潭大学 | Fe-B-W-Mn-Al zinc liquid corrosion resistance integral material |
| CN105506491B (en) * | 2015-12-08 | 2017-10-13 | 江苏华冶科技股份有限公司 | A kind of liquid zinc corrosion of resistance to molten aluminum alloy material and its casting technique |
| CN108220804A (en) * | 2018-03-19 | 2018-06-29 | 北京工业大学 | The Cr-Al alloy Fe-B alloys and its manufacturing method of resisting zinc liquid corrosion abrasion |
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| CN105506491B (en) * | 2015-12-08 | 2017-10-13 | 江苏华冶科技股份有限公司 | A kind of liquid zinc corrosion of resistance to molten aluminum alloy material and its casting technique |
| CN105734430A (en) * | 2016-03-31 | 2016-07-06 | 湘潭大学 | Fe-B-W-Mn-Al zinc liquid corrosion resistance integral material |
| CN105734430B (en) * | 2016-03-31 | 2017-11-24 | 湘潭大学 | A kind of Fe B W Mn Al liquid zinc corrosion resistant integral materials |
| CN108220804A (en) * | 2018-03-19 | 2018-06-29 | 北京工业大学 | The Cr-Al alloy Fe-B alloys and its manufacturing method of resisting zinc liquid corrosion abrasion |
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