阅读说明：本技术 一种耐磨耐腐蚀衬板及其制备方法 (Wear-resistant corrosion-resistant lining plate and preparation method thereof ) 是由 张轶 于 2018-08-14 设计创作，主要内容包括：本发明属于耐磨材料技术领域,特别涉及一种耐磨耐腐蚀衬板及其制备方法。一种耐磨耐腐蚀衬板,碳0.6～1％,硅0.4～0.8％,镁0.4～0.85％,锰0.4～1.0％,铬9～13％,钼1.5～1.9％,镍0.1～0.22％,钛0.05～0.20％,磷0.005～0.04％,硫0.005～0.04％,余量为铁。本发明配方合理,制作简单,使用寿命长,具有很高的强度、韧性、耐磨性和抗冲击力,减少了工厂更换耐磨耐腐蚀衬板的频率,降低了劳动强度,本发明原料易得,制作方法简单,有效节约了能源。(The invention belongs to the technical field of wear-resistant materials, and particularly relates to a wear-resistant corrosion-resistant lining plate and a preparation method thereof. A wear-resistant corrosion-resistant lining plate comprises 0.6-1% of carbon, 0.4-0.8% of silicon, 0.4-0.85% of magnesium, 0.4-1.0% of manganese, 9-13% of chromium, 1.5-1.9% of molybdenum, 0.1-0.22% of nickel, 0.05-0.20% of titanium, 0.005-0.04% of phosphorus, 0.005-0.04% of sulfur and the balance of iron. The wear-resistant and corrosion-resistant lining plate has the advantages of reasonable formula, simplicity in manufacturing, long service life, high strength, toughness, wear resistance and impact resistance, easiness in obtaining raw materials, simplicity in manufacturing method and capability of effectively saving energy, and the frequency of replacing the wear-resistant and corrosion-resistant lining plate in a factory is reduced, so that the labor intensity is reduced.)

1. The wear-resistant corrosion-resistant lining plate is characterized by comprising the following chemical components in percentage by weight: 0.6-1% of carbon, 0.4-0.8% of silicon, 0.4-0.85% of magnesium, 0.4-1.0% of manganese, 9-13% of chromium, 1.5-1.9% of molybdenum, 0.1-0.22% of nickel, 0.05-0.20% of titanium, 0.005-0.04% of phosphorus, 0.005-0.04% of sulfur and the balance of iron.

2. The wear and corrosion resistant liner plate of claim 1, comprising the following chemical components in weight percent: 0.6-0.8% of carbon, 0.55-0.8% of silicon, 0.6-0.7% of magnesium, 0.55-1.0% of manganese, 9-13% of chromium, 1.5-1.9% of molybdenum, 0.1-0.21% of nickel, 0.1-0.16% of titanium, 0.005-0.04% of phosphorus, 0.005-0.04% of sulfur and the balance of iron.

3. A method of making a wear and corrosion resistant liner plate according to claim 1 or 2, comprising the steps of:

s1, adding clean and dry common scrap steel, pig iron, stainless steel waste, magnesium ingots, ferromanganese, ferromolybdenum, nickel plates, titanium ingots and carburization waste electrodes into a smelting furnace, heating and melting, heating to 1500-1650 ℃ after the components are adjusted to be qualified, adding preheated ferrosilicon for precipitation and deoxidation, performing diffusion and deoxidation by a deep aluminum wire insertion method 2 minutes before tapping, and tapping;

s2, placing the efficient composite alterant and the rare earth at the bottom of the steel ladle, performing modification treatment on the molten steel, then pouring the molten steel into a steel ingot mould, wherein the pouring temperature of the molten steel is 1440-1460 ℃, the pouring is slow, medium and fast, and thin later, when the molten steel reaches a riser 3/5, adding the heat preservation agent, and after the steel ingot is poured for 5-10 minutes, tapping the riser for 2-3 times;

and S3, after cooling the wear-resistant and corrosion-resistant lining plate to room temperature, polishing, putting the lining plate into a heat treatment furnace, keeping the temperature at 750-850 ℃, keeping the temperature for 2.0-2.5 h, then discharging the lining plate from the furnace, naturally cooling, tempering at 250 ℃ for 2-2.5 h, and taking out the lining plate for natural cooling.

4. The method for manufacturing a wear-resistant and corrosion-resistant lining plate according to claim 3, wherein the rare earth in step S2 is cerium-based rare earth.

5. The method for preparing the wear-resistant and corrosion-resistant lining plate according to claim 3, wherein the efficient composite modifier in the step S2 is one of potassium and sodium.

6. The method for preparing the wear-resistant corrosion-resistant lining plate according to claim 3, wherein the high-efficiency composite modifier and the rare earth in the step S2 are respectively obtained by crushing the materials into small blocks with the granularity of less than 10mm and drying the small blocks at 280 ℃.

7. The method for manufacturing a wear-resistant and corrosion-resistant lining plate according to claim 3, wherein in the step S2, the modification treatment is performed on the molten steel by using an in-ladle pouring method.

8. The method for preparing the wear-resistant and corrosion-resistant lining plate according to claim 3, wherein the casting in the step S2 is performed by a bottom casting method.

Technical Field

The invention belongs to the technical field of wear-resistant materials, and particularly relates to a wear-resistant corrosion-resistant lining plate and a preparation method thereof.

Background

The wear-resistant material is a novel material with special electric, magnetic, optical, acoustic, thermal, mechanical, chemical and biological functions, is an important basic material for the high-tech fields of information technology, biotechnology, energy technology and the like and national defense construction, and has very important effect on the reconstruction of certain traditional industries. The wear-resistant material is the core of the new material field, plays an important role in promoting and supporting the development of high and new technologies, and accounts for about 85 percent in the global new material research field. With the arrival of the information society, the special wear-resistant material plays an important role in promoting and supporting the development of high and new technologies, is a key material in high-technology fields such as information, biology, energy, environmental protection, space and the like in the twenty-first century, becomes the key point of research and development of new material fields in countries in the world, and is also a hot spot of strategic competition in high-technology development of countries in the world.

The wear-resistant lining plate is formed by processing a wear-resistant steel plate through production processes of cutting, plate bending deformation, punching, welding and the like, such as a conveyor lining plate, a coal feeder bottom plate/cyclone separator inverted cone, a lining plate, a wear-resistant blade and the like, and the wear-resistant service life of the wear-resistant lining plate is prolonged by more than 15 times compared with that of a common steel plate.

Immediately, grinding roller body and wear-resisting welt are at the use, in case the fit clearance appears, will make wearing and tearing aggravation between body and the welt, and hot-blast and cement granule in addition lead to the production of slot to constantly erodeing of fitting surface, cause to strike the collision between body and the welt, make the welt produce the crackle even fracture when serious, the machine damages, especially the damage of speed reducer, causes malignant incident. Therefore, the research on wear-resistant lining boards is always an important direction in the field of wear resistance.

Disclosure of Invention

The invention aims to solve the technical problem of providing a wear-resistant corrosion-resistant lining plate which has the advantages of long service life, high hardness, good impact toughness and the like, and a preparation method of the wear-resistant corrosion-resistant lining plate.

In order to solve the technical problems, the invention adopts the following technical scheme:

the wear-resistant corrosion-resistant lining plate comprises the following chemical components in percentage by weight: 0.6-1% of carbon, 0.4-0.8% of silicon, 0.4-0.85% of magnesium, 0.4-1.0% of manganese, 9-13% of chromium, 1.5-1.9% of molybdenum, 0.1-0.22% of nickel, 0.05-0.20% of titanium, 0.005-0.04% of phosphorus, 0.005-0.04% of sulfur and the balance of iron.

In a preferred scheme, the wear-resistant and corrosion-resistant lining plate comprises the following chemical components in percentage by weight: 0.6-0.8% of carbon, 0.55-0.8% of silicon, 0.6-0.7% of magnesium, 0.55-1.0% of manganese, 9-13% of chromium, 1.5-1.9% of molybdenum, 0.1-0.21% of nickel, 0.1-0.16% of titanium, 0.005-0.04% of phosphorus, 0.005-0.04% of sulfur and the balance of iron.

The main function of the carbon and the chromium is to ensure the quantity and the form of carbide in the wear-resistant and corrosion-resistant lining plate, the carbide is increased along with the increase of the carbon content, the Cr/C ratio is increased, and the appearance of the eutectic carbide is formed by continuous net → sheet → rodOf the eutectic carbide crystal type undergoing a reduction from M₃C→M₃C+M₇C₃→M₇C₃The process of variation of (c). There are data to point out: when the eutectic carbide is unchanged and the Cr/C is 6.6-7.1, the expansion capability of the fracture lines of the wear-resistant and corrosion-resistant liner plate with the chromium is strongest.

A preparation method of a wear-resistant corrosion-resistant lining plate comprises the following steps:

s1, adding clean and dry common scrap steel, pig iron, stainless steel waste, magnesium ingots, ferromanganese, ferromolybdenum, nickel plates, titanium ingots and carburization waste electrodes into a smelting furnace, heating and melting, heating to 1500-1650 ℃ after the components are adjusted to be qualified, adding preheated ferrosilicon for precipitation and deoxidation, performing diffusion and deoxidation by a deep aluminum wire insertion method 2 minutes before tapping, and tapping;

s2, placing the efficient composite alterant and the rare earth at the bottom of the steel ladle, performing modification treatment on the molten steel, then pouring the molten steel into a steel ingot mould, wherein the pouring temperature of the molten steel is 1440-1460 ℃, the pouring is slow, medium and fast, and thin later, when the molten steel reaches a riser 3/5, adding the heat preservation agent, and after the steel ingot is poured for 5-10 minutes, tapping the riser for 2-3 times;

and S3, after cooling the wear-resistant and corrosion-resistant lining plate to room temperature, polishing, putting the lining plate into a heat treatment furnace, keeping the temperature at 750-850 ℃, keeping the temperature for 2.0-2.5 h, then discharging the lining plate from the furnace, naturally cooling, tempering at 250 ℃ for 2-2.5 h, and taking out the lining plate for natural cooling.

The shape, size, distribution and amount of inclusions, in particular sulphides, in steel strongly influence the properties of the steel, in particular the plasticity and toughness. The inclusions in the medium-high carbon alloy steel which is not subjected to rare earth modification treatment are mostly long-strip-shaped and have edges and corners, the number of the inclusions is large, and the fracture mode is a standard cleavage fracture mode. The rare earth added into the steel has the functions of desulfurization and degassing, according to the thermodynamic condition and application practice of the generation of the rare earth inclusions, the affinity of the rare earth elements with oxygen and sulfur is obviously greater than that of manganese, aluminum and the like, the rare earth elements are easy to generate a conjugated reaction with oxygen and sulfur to generate small-ball rare earth inclusions, and the brittle fracture of the medium-high carbon multi-element low alloy steel along the grain boundary is obviously improved. Therefore, after rare earth modification treatment, the number of inclusions is obviously reduced, the inclusions tend to be spheroidized and uniformly distributed in the steel, the toughness of the steel is improved, and a large number of tough pits appear on an impact fracture. However, excessive rare earth addition can cause the rare earth inclusions to be in broken chain distribution, and the plasticity and toughness of the steel are damaged.

Preferably, the rare earth in step S2 is cerium-based rare earth. The invention adds proper amount of cerium-based rare earth as modifier, which has larger atomic radius and small solubility in iron. Because of having great electronegativity, the chemical properties of the compounds are very active, a series of extremely stable compounds can be formed in steel and become non-spontaneous crystal cores, and therefore the function of refining grains is achieved. In addition, the rare earth is a surface active element, the generation speed of a crystal core can be increased, the growth of crystal grains is prevented, the refinement of the crystal grains is beneficial to the improvement of the toughness of the steel and plastic, and the refinement of the crystal grains is more obvious along with the increase of the content of the rare earth, which is related to the activation energy of the rare earth element capable of increasing the migration of austenite crystal boundaries.

Preferably, in step S2, the efficient composite modifier is one of potassium and sodium.

Preferably, in the step S2, the efficient composite alterant and the rare earth are respectively obtained by crushing the materials into small blocks with the particle size of less than 10mm and drying the small blocks at 280 ℃.

Preferably, in the modification treatment in step S2, the molten steel is modified by an in-ladle pouring method.

Preferably, in the step S2, the steel ingot is cast by a bottom casting method.

The invention has the beneficial effects that:

1. the wear-resistant and corrosion-resistant lining plate has the advantages of reasonable formula, simplicity in manufacturing, long service life, high strength, toughness, wear resistance and impact resistance, the frequency of replacing the wear-resistant and corrosion-resistant lining plate in a factory is reduced, and the labor intensity is reduced.

2. The carbon and the chromium of the invention ensure the quantity and the form of carbide in the wear-resistant and corrosion-resistant lining plate, the nickel has the functions of increasing the hardenability of the wear-resistant and corrosion-resistant lining plate, inhibiting the transformation from an austenite matrix to pearlite, promoting the formation of a martensite base, and the magnesium and the titanium have the functions of improving the mechanical property of the wear-resistant lining plate, enhancing the effect of high-temperature and corrosion resistance and prolonging the service life.

3. The invention adds proper amount of cerium-based rare earth as modifier, which has larger atomic radius and small solubility in iron. Because of having great electronegativity, the chemical properties of the compounds are very active, a series of extremely stable compounds can be formed in steel and become non-spontaneous crystal cores, and therefore the function of refining grains is achieved.

4. The invention has the advantages of easily obtained raw materials and simple manufacturing method, uses common scrap steel, pig iron and stainless steel waste as production raw materials, recycles and effectively saves energy.

5. The molten steel is subjected to modification treatment, so that the toughness and the strength of the wear-resistant and corrosion-resistant lining plate are improved, and the service life is prolonged.

Detailed Description

The technical solutions in the examples are clearly and completely described below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.