CN-121976117-A - Metal ceramic composite material, preparation method and wear-resistant scraper machine

Abstract

The invention relates to the field of wear-resistant materials and scraping machines, in particular to a metal ceramic composite material, a preparation method and a wear-resistant scraping machine, wherein the metal ceramic composite material comprises the following chemical elements in parts by weight: the metal ceramic composite material is formed by compounding the melting and drawing steel fiber and the zirconia ceramic powder, has the excellent toughness of the melting and drawing steel fiber and the high hardness and high temperature resistance of the ceramic material, can uniformly combine the melting and drawing steel fiber and the zirconia ceramic powder, effectively reduces the internal pores of the material and improves the compactness and the stability of the structure, and the wear-resistant scraper machine fully exerts the comprehensive advantages of high wear resistance, high temperature resistance and impact resistance of the material by adopting the metal ceramic composite material to manufacture the substrate and effectively reduces the friction loss in the running process of a frame and a chain by matching with the structural design of a wear-resistant component fixed by bolts.

Inventors

• ZHANG JINKUN
• BI CHUNSHAN
• GAO WANLI
• HU JIANGSHAN
• CHENG MENG
• WANG ZAIFENG
• Lv Mingxi
• XU CHONGHUA
• LIU SHUAI
• WANG YACHAO

Assignees

• 山东钢铁集团日照有限公司

Dates

Publication Date

20260505

Application Date

20251219

Claims (10)

1. 1. The metal ceramic composite material is characterized by comprising, by weight, 0.25% or less of C, 19-37% of Ni, 20-26% of Cr, 1.5% or less of Si, 1.5% or less of Mn and the balance of Fe, and zirconia ceramic powder, wherein the chemical elements of the steel fiber comprise, by weight, 2-2.5% of zirconia, 4-6% of silicon nitride, 60-70% of alumina, 10-12% of quartz sand, 2-3% of graphene and 5-8% of carbon fiber.
2. 2. The cermet composite of claim 1 wherein the melt drawn steel fibers have a diameter Φ0.3-0.5mm, a length 10-25mm and a melting point in the range 1400-1450 ℃.
3. 3. A preparation method of a metal ceramic composite material is characterized in that, for preparing a cermet composite according to claim 2; the method comprises the following steps: S1, putting the raw materials consisting of the melting and drawing steel fibers and the zirconia ceramic powder into a high-speed mixer to mix and stir, controlling the rotating speed of the mixer to be 1200-2000r/min, the stirring time to be 25-40min, stopping the mixer once every 10-15min in the stirring process, manually scraping and stirring the raw materials attached to the inner wall, the bottom and the stirring paddles of the mixer to ensure no raw material residue accumulation, and controlling the temperature in the mixer to be not more than 40 ℃ in the stirring process; s2, placing the uniformly stirred mixture into a die, and pressurizing for 45-50MPa to prepare a prefabricated part; S3, placing the vertical surface of the prefabricated member, placing the prefabricated member into a heating furnace for sintering to 950 ℃, cooling to 300 ℃, then sintering to 1400 ℃, preserving heat for 4 hours, and cooling along with the furnace; s4, checking after normal temperature, and detecting qualified products.
4. 4. The abrasion-resistant scraper comprises a frame (1), a head chain wheel (3) and a tail chain wheel (2) are rotationally arranged on the frame (1), a chain (5) is wound on the head chain wheel (3) and the tail chain wheel (2), a plurality of scrapers (4) are arranged on the chain (5), and the abrasion-resistant scraper is characterized in that an abrasion-resistant component (9) is arranged on the frame (1) in a matched mode with the chain (5), the abrasion-resistant component (9) comprises a base plate (903) arranged on the frame (1) through a first bolt (901), and the base plate (903) is made of the metal ceramic composite material according to claim 2.
5. 5. The abrasion-resistant scraper machine according to claim 4, wherein the abrasion-resistant cast stone (902) is arranged in the middle of the base plate (903) by using a first bolt (901), and the abrasion-resistant cast stone (902) is made of the metal ceramic composite material according to claim 2.
6. 6. The wear-resistant scraper machine according to claim 4, wherein the pin shaft (6) of the chain (5) is sleeved with a wear-resistant sleeve (7), and the wear-resistant sleeve (7) is made of the metal ceramic composite material according to claim 2.
7. 7. The abrasion-resistant scraper machine according to claim 4, wherein a rib plate (10) is arranged between the rear side of the scraper (4) and a chain link of the chain (5), the scraper (4) comprises a base material (401), the front side of the base material (401) is provided with an abrasion-resistant plate (402) through a bolt II (403), and the abrasion-resistant plate (402) is made of the metal ceramic composite material according to claim 2.
8. 8. The wear-resistant scraper machine according to claim 7, characterized in that a high temperature resistant ceramic glue is evenly applied between the wear-resistant plate (402) and the substrate (401).
9. 9. The wear-resistant scraper machine according to claim 4, wherein the head chain wheel (3) and the tail chain wheel (2) are identical in structure, wear-resistant blocks (302) are mounted at tooth grooves (306) of the head chain wheel (3) through bolts III (301), and the wear-resistant blocks (302) are made of the metal ceramic composite material according to claim 2.
10. 10. The wear-resistant scraper machine according to claim 9, wherein a positioning boss (305) is fixedly arranged in the middle of the tooth slot (306), and a positioning groove (304) is formed in the bottom surface of the wear-resistant block (302) in cooperation with the positioning boss (305).

Description

Metal ceramic composite material, preparation method and wear-resistant scraper machine Technical Field The invention relates to the field of wear-resistant materials and scraper machines, in particular to a metal ceramic composite material, a preparation method and a wear-resistant scraper machine. Background The embedded scraper conveyor is used as core equipment in the field of pellet bulk cargo transportation, and is widely applied to industrial scenes such as raw material sintering, pellet conveying and the like by virtue of the advantages of small volume, strong sealing property, flexible process arrangement, capability of feeding and discharging at multiple points and the like, so that the operation environment is effectively improved, and the environmental pollution is reduced. The working principle is that the continuous conveying of the materials in the horizontal, oblique or vertical directions is realized by relying on the internal friction force of the materials, the lateral pressure of the shell and the pushing force of the scraper chain, and the core composition comprises a frame, a head chain wheel, a tail chain wheel, a chain, a scraper and other parts. In long-term industrial application, the traditional embedded scraper machine mainly adopts metal materials to manufacture key parts to meet basic transmission requirements, and can realize basic conveying functions, but the performance short plates are gradually exposed under the high-temperature and high-abrasion pellet bulk conveying working conditions. With the expansion of industrial production scale and the improvement of conveying efficiency requirements, the problems of short service life, poor wear resistance and the like of the traditional buried scraper machine are increasingly outstanding. In the prior art, a part of improvement scheme (such as CN 212100576U) tries to set ceramic plates at the inner and outer chain plates of a chain to reduce abrasion, but omits parts with more serious abrasion in actual working conditions such as scraping plates, chain pins, head sprocket toothed plates and the like, so that the overall abrasion-resistant effect is limited, and the online service life of the scraper is usually only about 8 months. Meanwhile, the existing metal ceramic composite material for the scraper machine has the problems of unreasonable formula design, lack of accurate proportioning of melting and drawing steel fibers and ceramic powder components, and lack of material hardness and toughness, and in addition, the related preparation process lacks scientific temperature gradient control and pressurization parameter design, so that the internal structure of the material after sintering is uneven, and the high temperature resistance and shock resistance are difficult to meet the severe requirements of high Wen Sanliao conveying. The ceramic composite material has the following problems that firstly, the formulation design of the existing ceramic composite material lacks pertinence, the component selection and proportion collocation are unreasonable, the optimal combination with high hardness, super wear resistance and good toughness is not formed, the complex stress working conditions of key wear parts such as a head sprocket, a pin shaft and a scraper of a scraper machine cannot be adapted, the component wear speed is high, secondly, the preparation process parameters of the existing ceramic composite material are not scientific, the temperature curve, the heat preservation time and other parameters in the mixing, stirring, pressurizing and sintering processes are designed roughly, the internal porosity and the structural compactness of the formed material are insufficient, the wear resistance and the service life of the material are further weakened, thirdly, the structural design of the existing scraper machine is defective, the key wear parts do not adopt special wear resistant structures, the head sprocket toothed plate, the scraper plate, the bottom lining plate of the rack and other components are all in one-piece metal structure, the whole disassembly and replacement are needed after the wear, the maintenance difficulty is high, the structural design of the tail sprocket is unreasonable, the tensioning device lacks intelligent regulation functions, the vibration and the running of the pin shaft and the sprocket are easy to occur, and the wear resistance of the whole equipment is further shortened. Disclosure of Invention Aiming at the problems that the prior metal ceramic composite material is unreasonable in component selection and proportion collocation and does not form an optimal combination with high hardness, super wear resistance and good toughness, the invention provides a metal ceramic composite material, a preparation method and a wear-resistant scraper machine. In order to solve the problems, the invention adopts the technical proposal that, The metal ceramic composite material comprises, by weight, melting