CN106636865A

CN106636865A - Composite modifier for gray cast iron of tungsten molybdenum cobalt-silicon iron alloy carrying nano zirconium-silicon oxide and preparation method of composite modifier

Info

Publication number: CN106636865A
Application number: CN201611158878.3A
Authority: CN
Inventors: 钟小苹
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-15
Filing date: 2016-12-15
Publication date: 2017-05-10

Abstract

The invention relates to a modifier for gray cast iron, in particular to a composite modifier for the gray cast iron of tungsten molybdenum cobalt-silicon iron alloy carrying a nano zirconium-silicon oxide and a preparation method of the composite modifier. The modifier is prepared from, by weight, 1-2 parts of nanometer zirconium, 1-1.5 parts of nanosilicon dioxide, 1-2 parts of ferrophosphorus powder, 1-2 parts of molybdenum powder, 0.2-0.4 part of tungsten powder, 4-6 parts of expanded graphite powder, 2-3 parts of cobalt powder, 4-5 parts of silicon powder containing 45% silicon, 0.2-0.3 part of aluminum-magnesium silicate, 20-25 parts of ethanol water with the concentration being 5-8%, and 0.4-0.5 part of an assistant. According to the composite modifier, nano powder carried by the expanded graphite powder and manganese molybdenum copper-silicon iron alloy powder are bonded to each other, the composite modifier stable in performance is obtained and has great dispersity and thermal stability, the composite modifier can be rapidly melted when being added into molten iron, the shape of graphite is changed, the number of crystal nucleus is increased, the cast iron structure is refined, the chilling tendency is relieved, the toughness is improved, the machining performance is improved, compared with a traditional modifier, the composite modifier is more convenient and faster to use and higher in raw material utilization rate, and the production cost is controlled.

Description

A kind of casting pig of tungsten cobalt-Antaciron load nanometer zirconium-Si oxide uses compound Alterant and preparation method thereof

Technical field

The present invention relates to a kind of casting pig alterant, and in particular to a kind of tungsten cobalt-Antaciron load nanometer zirconium-silicon Casting pig composite modifier of oxide and preparation method thereof.

Background technology

Casting pig refers to the cast iron with flake graphite, is also to be employed a most wide class cast iron in the industrial production, its With good casting character, while show excellent at aspects such as vibration damping, wear-resisting, machining and notch sensitivities, but Because the flake graphite in casting pig is isolated seriously to matrix so as to which mechanical property performance is poor, the intensity of casting pig is improved It is urgent problem in industry.

The main method for improving strength of gray cast iron at present be add in fusion process a certain amount of chromium, molybdenum, nickel, copper and The alloying elements such as rare earth, to refine nucleus, increase nucleus quantity as alterant, so as to improve tissue intensity, though this method The intensity of casting pig can so be improved, but raw material availability is low, the restriction of the factor such as production cost height；Profit is also risen in recent years With nano material as alterant, can be with nucleus quantity in substantial amounts of increase melt, while crystal grain thinning, improves the densification of tissue Degree, yet with the design feature of nano material, its bad dispersibility in the melt, easily floating needs to aid in special spray Injection device, improves production cost.

The content of the invention

It is an object of the present invention to prepare a kind of new alterant by nano material and alloying element mixed load, subtract The usage amount of few expensive alloying elements, while simple lossless improvement nano material is dispersed in the melt, improves each raw material Utilization rate, reaching improves the purpose of Mechanical Properties of Grey Cast Iron, and to achieve these goals, the present invention provides a kind of tungsten cobalt-silicon Casting pig composite modifier of ferroalloy load nanometer zirconium-Si oxide and preparation method thereof, the technical scheme of employing is as follows：

A kind of casting pig composite modifier of tungsten cobalt-Antaciron load nanometer zirconium-Si oxide and preparation method thereof, its It is characterised by, the alterant is made up of the raw material of following weight portion：Nano zirconium dioxide 1-2, nano silicon 1-1.5, phosphorus Iron powder 1-2, molybdenum powder 1-2, tungsten powder 0.2-0.4, expanded graphite powder 4-6, cobalt powder 2-3, siliceous 45% ferrosilicon 4-5, aluminium-magnesium silicate 0.2-0.3, concentration are ethanol water 20-25, the auxiliary agent 0.4-0.5 of 5-8%.

Described auxiliary agent is made up of the raw material of following weight portion：Potassium feldspar 2-3, lithium slag 1-3, Yttrium base rare earth inovulant 2- 3rd, boron phosphate 0.5-0.8, carbon nano-fiber 2-3, sodium lignin sulfonate 1-2, organobentonite 2-3, water 15-20, preparation method For：First sodium lignin sulfonate, organobentonite are thrown in water, 40-50min is thoroughly mixed, it is standby to make activating solution, subsequently Potassium feldspar, lithium slag are crushed, 80-120 mesh sieves are crossed, in screenings input activating solution 1-2h is ground, obtain activation potassium feldspar-lithium ore deposit Slag homogenate, other residual components are finally added to again activate in homogenate, and stirring mixing 2-3h obtains final product dopen Nano carbon fiber Composite strengthening breeds auxiliary agent.

A kind of system of the casting pig composite modifier of described tungsten cobalt-Antaciron load nanometer zirconium-Si oxide Preparation Method is：

（1）Put into after being first well mixed ferrophosphorus powder, molybdenum powder, tungsten powder, cobalt powder with ferrosilicon in electric furnace, moulding by casting after melting, with Afterwards by gained alloy breaks down, 300-400 mesh sieves are crossed, obtain alloyed powder standby；

（2）Nano zirconium dioxide, nano silicon are mixed with expanded graphite powder, the ethanol for putting into 10-15 weight portions is water-soluble In liquid, slurry is carried out into closed ball milling process after being uniformly mixed, after ball milling 2-3h, gained slurry high-speed stirred mixing 12- 15h, obtains expanded graphite supporting nanometer zirconium-Si oxide slurry standby；

（3）By step（1）Alloy powder, the step of gained（2）Gained slurry mixes with other residual components, in closed environment Secondary agitation is carried out, mixed slurry high-speed stirred is mixed into heated-air drying after 15-18h, completely remove moisture content, be broken into fine powder Shape, obtains final product.

Compared with prior art, composite modifier of the present invention is by with the load of the expanded graphite powder of high-melting-point, high-specific surface area Nano zirconium dioxide, nano silica powder and manganese molybdenum copper-ferro-silicon alloy powder mutually bond load, a kind of performance is obtained steady Fixed alterant, nano material therein has good dispersiveness and heat endurance, the hybrid alloys powder of doping in liquation Greatly enhance the intensity of cast iron；The alterant is added can quickly be fused into molten iron, promote graphitizing process, change graphite Shape, increases nucleus quantity, refines cast-iron structure, mitigates chilling tendency, improves toughness, improves processing characteristics, and it is than tradition It is more convenient that alterant is used, and raw material availability is higher, and production cost is controlled.

Specific embodiment

Embodiment

The present embodiment alterant is made up of following raw material：Nano zirconium dioxide 1, nano silicon 1.5, ferrophosphorus Powder 2, molybdenum powder 1.5, tungsten powder 0.3, expanded graphite powder 5, cobalt powder 2, siliceous 45% ferrosilicon 5, the second that aluminium-magnesium silicate 0.2, concentration is 8% Alcohol solution 22, auxiliary agent 0.5.

Described auxiliary agent is made up of the raw material of following weight portion：Potassium feldspar 2, lithium slag 2, Yttrium base rare earth inovulant 2.5, phosphorus Sour boron 0.6, carbon nano-fiber 3, sodium lignin sulfonate 1.8, organobentonite 3, water 18, preparation method is：First by sulfomethylated lignin Sour sodium, organobentonite are thrown in water, are thoroughly mixed 45min, and it is standby to make activating solution, subsequently by potassium feldspar, lithium slag powders It is broken, 100 mesh sieves are crossed, 1.5h is ground in screenings input activating solution, activation potassium feldspar-lithium slag homogenate is obtained, finally again by other Residual components are added in activation homogenate, and stirring mixing 2.5h, the composite strengthening for obtaining final product dopen Nano carbon fiber breeds auxiliary agent.

（1）Put into after being first well mixed ferrophosphorus powder, molybdenum powder, tungsten powder, cobalt powder with ferrosilicon in electric furnace, moulding by casting after melting, with Afterwards by gained alloy breaks down, 400 mesh sieves are crossed, obtain alloyed powder standby；

（2）Nano zirconium dioxide, nano silicon are mixed with expanded graphite powder, the ethanol water of 11 weight portions is put into In, slurry is carried out into closed ball milling process after being uniformly mixed, after ball milling 2.5h, gained slurry high-speed stirred mixing 14h is obtained Expanded graphite supporting nanometer zirconium-Si oxide slurry is standby；

（3）By step（1）Alloy powder, the step of gained（2）Gained slurry mixes with other residual components, in closed environment Secondary agitation is carried out, mixed slurry high-speed stirred is mixed into heated-air drying after 16h, completely remove moisture content, be broken into fine-powdered, i.e., .

By taking HT200 as an example, using method is the present embodiment：Ladle bottom pouring process adds respectively used in HT200 manufacture processes Enter the alterant of 0.55wt%, 0.65wt%, 0.80wt%, the casting liquid after Metamorphism treatment is poured and outpours sample, and specimen size is Φ 30mm × 300mm, and be respectively labeled as 1,2,3, the respective mechanical experimental results of the sample of the rotten agent contents of these three differences It is as follows：

Numbering	1	2	3
				Tensile strength	268MPa	295MPa	320MPa

Claims

1. a kind of tungsten cobalt-Antaciron loads casting pig composite modifier of nanometer zirconium-Si oxide and preparation method thereof, Characterized in that, the alterant is made up of the raw material of following weight portion：Nano zirconium dioxide 1-2, nano silicon 1-1.5, Ferrophosphorus powder 1-2, molybdenum powder 1-2, tungsten powder 0.2-0.4, expanded graphite powder 4-6, cobalt powder 2-3, siliceous 45% ferrosilicon 4-5, aluminium-magnesium silicate 0.2-0.3, concentration are ethanol water 20-25, the auxiliary agent 0.4-0.5 of 5-8%；

Described auxiliary agent is made up of the raw material of following weight portion：Potassium feldspar 2-3, lithium slag 1-3, Yttrium base rare earth inovulant 2-3, phosphorus Sour boron 0.5-0.8, carbon nano-fiber 2-3, sodium lignin sulfonate 1-2, organobentonite 2-3, water 15-20, preparation method is：First Sodium lignin sulfonate, organobentonite are thrown in water, 40-50min is thoroughly mixed, it is standby to make activating solution, subsequently by potassium Feldspar, lithium slag are crushed, and cross 80-120 mesh sieves, and in screenings input activating solution 1-2h is ground, and obtain activation potassium feldspar-lithium slag equal Slurry, other residual components are finally added to again activate in homogenate, and stirring mixing 2-3h obtains final product the compound of dopen Nano carbon fiber Auxiliary agent is bred in enhancing.

2. a kind of casting pig of tungsten cobalt as claimed in claim 1-Antaciron load nanometer zirconium-Si oxide is become with compound Matter agent and preparation method thereof, its preparation method is：