CN104532106B - Preparation method of superfine crusher hammer wear-resistant material - Google Patents

Preparation method of superfine crusher hammer wear-resistant material Download PDF

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CN104532106B
CN104532106B CN201410787141.2A CN201410787141A CN104532106B CN 104532106 B CN104532106 B CN 104532106B CN 201410787141 A CN201410787141 A CN 201410787141A CN 104532106 B CN104532106 B CN 104532106B
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tup
casting
abrasive
alterant
addition
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CN201410787141.2A
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Chinese (zh)
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CN104532106A (en
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王振廷
孟君晟
赵春香
毛新宇
史晓萍
陈永生
高红明
冯帆
朱世奎
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黑龙江科技大学
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    • Y02P10/212

Abstract

The invention discloses a preparation method of a superfine crusher hammer wear-resistant material belonging to the technical field of the preparation of a novel wear-resistant material. The hammer wear-resistant material consists of 3 to 4 percent by weight of C, 8 to 10 percent by weight of V, 1 to 3 percent by weight of W, 0.1 to 0.3 percent by weight of Mo, less than or equal to 0.06 percent by weight of P, less than or equal to 0.06 percent by weight of S and the balance of iron. The preparation method comprises the steps: mixing the material, melting the material in an acid middle-frequency electric induction furnace, adding ferrosilicon and ferromanganese to carry out the deoxygenation, finally adding pure aluminum to carry out the deoxygenation, immediately pouring the wear-resistant material into a casting ladle of alterant formed by nanoscale rare-earth ferro-magnesium-silicon after the deoxidization is completed, and casting the crusher hammer by utilizing the modified wear-resistant material. The hardness of the hammer is 65HRC, the impact flexibility is more than 10J/cm<2>, the wear resistance is good, and the service life is long.

Description

A kind of preparation method of super-fine crusher tup high-abrasive material

Technical field

The invention belongs to abrasion resistance material preparing technical field, particularly to a kind of super-fine crusher tup high-abrasive material preparation method.

Background technology

In the industrial circles such as mine, metallurgy, electric power and building materials, crushing mechanism occupies sizable ratio, and wherein most accessory is all vulnerable part.According to statistics, the steel that China consumes due to this abrasion every year reach million tons, cost more than 4,000,000,000 yuan.Therefore, developing abrasion resistance material, the tool in service life improving spare and accessory parts is of great significance.

Disintegrating machine is the widely used crushing mechanisms of industry such as cement, pottery, mine, electric power, tup is the critical piece of broken material in disintegrating machine, these parts in use hammer handle constantly bears bending stress and the impulsive force of alternation, and tup position is then primarily subjected to stronger impulsive force and frictional force.At present, broken, the tup of size reduction machinery adopts potassium steel manufacture the most always.But owing to the percussion of working condition is little, it is impossible to make potassium steel be sufficiently hardened, thus wearability is the highest.Reflecting according to scene, the life-span of potassium steel accessory is the most relatively low.Such as, with hammer mill crushed stone lime stone, the service life of its tup is 7-20 days, and the life-span of bar is about 3 days.The bar life-span of crushed stone lime stone is 1-3 days.New high-abrasive material replacement potassium steel is developed so the most numerous and confused.Therefore, research and develop novel wear resistant tup, reduce material abrasion, reduce cost, improve productivity ratio, energy-saving and emission-reduction are had important using value.

Recent research indicate that, high-vanadium high-speed steel does not only have the highest hardness and at a relatively high toughness, and there is good wearability, receive much concern as abrasion resistance material, existing research shows, the wearability of high-vanadium high-speed steel is more than 3 times of rich chromium cast iron, is more than 10 times of potassium steel, has been applied to the multiple wearing pieces such as roll, tup and ball grinding machine lining board.Current China is in research and development and the application starting stage of high-vanadium high-speed steel, use herein with V as essential element, add the alloying elements such as a certain amount of W, Mo, by composition proportion, smelting and pouring and the technique such as Metamorphism treatment and heat treatment, super-fine crusher tup high-abrasive material is prepared in production, meet production requirement, improve the service life of tup.

Summary of the invention

It is an object of the invention to provide the preparation method of a kind of super-fine crusher tup high-abrasive material, be characterised by, comprise the steps:

1) high-abrasive material percentage composition composition: C:3-4wt%, V:8-10 wt %, W:1-3 wt %, Mo:0.1-0.3 wt %, P :≤0.06 wt %, S :≤0.06 wt %, remaining is ferrum;

2) use carvan, ferrotungsten, molybdenum-iron, ordinary scrap steel, the pig iron according to the C:3-4wt% of step 1), V:8-10 wt %, W:1-3 wt %, Mo:0.1-0.3 wt %, P :≤0.06 wt %, S :≤0.06 wt % carries out calculating dispensing, 100kg acidity medium-frequency induction furnace is used to carry out melting, when the temperature of molten iron reaches 1450-1500 DEG C, be sequentially added into ferrosilicon, ferromanganese carries out deoxidation, ultimately joins fine aluminium and carries out deoxidation, and fine aluminium addition is as the criterion with complete deoxidation, then pouring in casting ladle by molten iron, pouring temperature is 1380-1400 DEG C;

3) bottom casting ladle, put into a nano modification alterant, simultaneously when being poured into die cavity, use cast limit, limit to add secondary nano modification alterant, carry out twice-modified modifying-refining;

4) casting of tup and heat treatment

The casting of tup uses permanent mold casting, and coating uses graphite powder, air cooling of unpacking after pouring into a mould 10-12 hour, spruing, cleaning overlap and burr;Then tup being carried out heat treatment, its heat treatment method is that quenching adds lonneal, will slowly be warmed up to 1000-1100 DEG C by tup, be incubated 4-5 hour, be cooled to room temperature the most in atmosphere;Wearing piece after quenching being heated to 200-300 DEG C, is incubated 3-4 hour, the hardness of workpiece is 65HRC, and impact flexibility is at 10J/cm2Above.

Described step 2) in the trade mark of ferrosilicon be FeSi75-A, addition is 0.2-0.5kg;The trade mark of ferromanganese is FeMn78C1.5, and addition is 0.2-0.5kg.

Described once, twice-modified alterant be nano modification alterant, the most modified alterant uses the micron order feeding being made up of nano-scale rare earth magnesium Antaciron, and micron order feeding granularity is 30-100 μm, and addition is the 2-3% of casting weight;The granularity of nano-scale rare earth magnesium Antaciron is 300-500nm.

The 1-3 wt% that addition is casting weight of described twice-modified alterant

The trade mark FeSiMg8RE7 of described nano-scale rare earth magnesium Antaciron.

The invention has the beneficial effects as follows that super-fine crusher hammer head material has a characteristic that

(1) use modified nano rare earth magnesium Antaciron feeding, enable nano level alterant to join in molten iron, improve modification effect.

(2) secondary metamorphic is used to process, it is possible to the modification effect making high-abrasive material is good.

(3) this high-abrasive material has hardness is 65HRC, and impact flexibility is at 10J/cm2Above, it is adaptable to high-wearing wearing piece, high-abrasive material tup hardness height of the present invention, good toughness, wearability are high, have broad application prospects.

Accompanying drawing explanation

Fig. 1 is untreated high vanadium tungsten wear resistant cast iron scanning figure.

Fig. 2 is the scanning figure processed through secondary metamorphic.

Detailed description of the invention

The present invention provides the preparation method of a kind of super-fine crusher tup high-abrasive material, is explained the present invention below in conjunction with embodiment.

Embodiment 1

1. use carvan 10-15kg, ferrotungsten 1-3kg, molybdenum-iron 0.5-1kg, ordinary scrap steel 70-80kg, pig iron 8-10kg to carry out dispensing, 100kg acidity medium-frequency induction furnace is used to carry out melting, when the temperature of molten iron reaches 1450-1500 DEG C, being sequentially added into ferrosilicon (trade mark: FeSi75-A), addition is 0.2-0.5kg.Ferromanganese (trade mark: FeMn78C1.5), addition is that 0.2-0.5kg carries out deoxidation, ultimately joins fine aluminium and carries out complete deoxidation, then pours in casting ladle by molten iron, and pouring temperature is 1380-1400 DEG C;When not adding nano modification alterant, the tissue of foundry goods is as shown in Fig. 1.Carbide particle is thick, uneven.When putting into a nano modification alterant bottom casting ladle, addition is 2 wt % of casting weight.Using in the casting process be poured into die cavity simultaneously and add secondary nano modification alterant, its addition is 1.5 wt% of casting weight, carries out secondary metamorphic micronization processes, and the tissue of foundry goods is as shown in Fig. 2, and cast structure refines, even particle distribution.The granularity of nano powder is 300-500 nanometer, and micron order feeding granularity is 30-100 μm.

2. the casting of tup and Technology for Heating Processing, tup uses permanent mold casting, and coating uses graphite powder.Unpacking air cooling, spruing, cleaning overlap and burr after pouring into a mould 10-12 hour;Then carrying out heat treatment: carry out heat treatment in chamber type electric resistance furnace, Technology for Heating Processing is that quenching adds lonneal;Will slowly be warmed up to 1000-1100 DEG C by tup, be incubated 4-5 hour, be cooled to room temperature the most in atmosphere.Under the conditions of 200-300 DEG C, the high vanadium tungsten ironcasting after quenching is incubated 3-4 hour, and i.e. can get hardness is more than 65HRC, and impact flexibility is at 10J/cm2Above high-abrasive material.

Embodiment 2

1. use in carbon vanadium iron 10-15kg, ferrotungsten 2-4kg, molybdenum-iron 1-2kg), ordinary scrap steel 70-80kg, the pig iron 10-15 kg carry out dispensing, 100kg acidity medium-frequency induction furnace is used to carry out melting, when the temperature of molten iron reaches 1450-1500 DEG C, being sequentially added into ferrosilicon (trade mark: FeSi75-A), addition is 0.2-0.5kg.Ferromanganese (trade mark: FeMn78C1.5), addition is that 0.2-0.5kg carries out deoxidation, ultimately joins fine aluminium and carries out deoxidation, then pours in casting ladle by molten iron, and pouring temperature is 1380-1400 DEG C;Putting into a nano modification alterant bottom casting ladle, addition is 2.5 wt % of casting weight.Using in the casting process be poured into die cavity simultaneously and add secondary nano modification alterant, its addition is 2 wt% of casting weight, carries out secondary metamorphic micronization processes.The granularity of nano powder is 300-500 nanometer, and micron order feeding granularity is 30-100 μm.

2. the casting of tup and Technology for Heating Processing, tup uses permanent mold casting, and coating uses graphite powder.Unpacking air cooling, spruing, cleaning overlap and burr after pouring into a mould 10-12 hour;Then carrying out heat treatment: carry out heat treatment in chamber type electric resistance furnace, Technology for Heating Processing is that quenching adds lonneal;Will slowly be warmed up to 1000-1100 DEG C by tup, be incubated 4-5 hour, be cooled to room temperature the most in atmosphere.Under the conditions of 200-300 DEG C, the high vanadium tungsten ironcasting after quenching is incubated 3-4 hour, and i.e. can get hardness is more than 60HRC, and impact flexibility is at 10J/cm2Above high-abrasive material.

Embodiment 3

1. use low-carbon (LC) vanadium iron 10-15kg, ferrotungsten 2-4kg, molybdenum-iron 1-2kg, ordinary scrap steel 70-80kg, the pig iron 20-30 to carry out dispensing, 100kg acidity medium-frequency induction furnace is used to carry out melting, when the temperature of molten iron reaches 1450-1500 DEG C, being sequentially added into ferrosilicon (trade mark: FeSi75-A), addition is 0.2 ~ 0.5kg.Ferromanganese (trade mark: FeMn78C1.5), addition is that 0.2 ~ 0.5kg carries out deoxidation, ultimately joins fine aluminium and carries out deoxidation, then pours in casting ladle by molten iron, and pouring temperature is 1350-1400 DEG C;Putting into a nano modification alterant bottom casting ladle, addition is 3 wt % of casting weight.Using in the casting process be poured into die cavity simultaneously and add secondary nano modification alterant, its addition is 2.5 wt% of casting weight, carries out secondary metamorphic micronization processes.The granularity of nano powder is 300-500 nanometer, and micron order feeding is 30-100 μm.

2. the casting of tup and Technology for Heating Processing, tup uses permanent mold casting, and coating uses graphite powder.Unpacking air cooling, spruing, cleaning overlap and burr after pouring into a mould 10-12 hour;Then carrying out heat treatment: carry out heat treatment in chamber type electric resistance furnace, Technology for Heating Processing is that quenching adds lonneal;Will slowly be warmed up to 1000-1100 DEG C by tup, be incubated 4-5 hour, be cooled to room temperature the most in atmosphere.Under the conditions of 200-300 DEG C, the high vanadium tungsten ironcasting after quenching is incubated 3-4 hour, and i.e. can get hardness is more than 60HRC, and impact flexibility is at 10J/cm2Above high-abrasive material.

Claims (5)

1. a preparation method for super-fine crusher tup high-abrasive material, containing C:3-4wt%, V:8-10 wt %, P :≤0.06 wt in high-abrasive material composition %, S :≤0.06 wt %, is characterised by, comprises the steps:
1) high-abrasive material percentage composition is possibly together with W:1-3 wt %, Mo:0.1-0.3 Wt %, remaining is ferrum;
2) use carvan, ferrotungsten, molybdenum-iron, ordinary scrap steel, the pig iron according to C:3-4wt%, V:8-10 wt %, W:1-3 wt %, the Mo:0.1-0.3 wt % of step 1), P :≤0.06 wt %, S :≤0.06 wt % carries out calculating dispensing, 100kg acidity medium-frequency induction furnace is used to carry out melting, when the temperature of molten iron reaches 1450-1500 DEG C, be sequentially added into ferrosilicon, ferromanganese carries out deoxidation, ultimately join fine aluminium and carry out deoxidation, fine aluminium addition is as the criterion with complete deoxidation, then pours in casting ladle by molten iron, and pouring temperature is 1380-1400 DEG C;
3) bottom casting ladle, put into a nano modification alterant, simultaneously when being poured into die cavity, use cast limit, limit to add secondary nano modification alterant, carry out twice-modified modifying-refining;
4) casting of tup and heat treatment
The casting of tup uses permanent mold casting, and coating uses graphite powder, air cooling of unpacking after pouring into a mould 10-12 hour, spruing, cleaning overlap and burr;Then tup being carried out heat treatment, its heat treatment method is that quenching adds lonneal, will slowly be warmed up to 1000-1100 DEG C by tup, be incubated 4-5 hour, be cooled to room temperature the most in atmosphere;Wearing piece after quenching being heated to 200-300 DEG C, is incubated 3-4 hour, the hardness of workpiece is 65HRC, and impact flexibility is at 10J/cm2Above.
The preparation method of a kind of super-fine crusher tup high-abrasive material, is characterised by, described step 2) in the trade mark of ferrosilicon be FeSi75-A, addition is 0.2-0.5kg;The trade mark of ferromanganese is FeMn78C1.5, and addition is 0.2-0.5kg.
A kind of preparation method of super-fine crusher tup high-abrasive material, it is characterised by, described once, twice-modified alterant be nano modification alterant, the most modified alterant uses the micron order feeding being made up of nano-scale rare earth magnesium Antaciron, micron order feeding granularity is 30-100 μm, and addition is the 2-3% of casting weight;The granularity of nano-scale rare earth magnesium Antaciron is 300-500nm.
The preparation method of a kind of super-fine crusher tup high-abrasive material, is characterised by, the 1-3 wt% that addition is casting weight of described twice-modified alterant
The preparation method of a kind of super-fine crusher tup high-abrasive material, is characterised by, the trade mark FeSiMg8RE7 of described nano-scale rare earth magnesium Antaciron.
CN201410787141.2A 2014-12-18 2014-12-18 Preparation method of superfine crusher hammer wear-resistant material CN104532106B (en)

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CN100485075C (en) * 2007-04-03 2009-05-06 西安交通大学 High-carbon high-vanadium high-speed steel composite roller and heat treatment method thereof
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CN101884945A (en) * 2010-06-30 2010-11-17 清原满族自治县三方耐磨材料有限公司 Hammer head for crusher and processing method thereof
CN102660714B (en) * 2012-06-05 2013-12-18 河南理工大学 High-carbon and high-vanadium wear-resistant steel
CN103320720A (en) * 2013-07-15 2013-09-25 四川大学 Vanadium-containing high-boron high-chromium wear-resistant alloy and preparation method thereof
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