High-strength rare earth wear-resistant alloy is a new type of rare earth alloy material, containing Cr, Ni, V, Mo, Mn, W, Cu and other alloying elements. High-strength, low-alloy, rare earth wear-resistant steel not only has high hardness, but also has certain mechanical properties, good welding performance at room temperature, and has the possibility of stability and field opening, and also has certain corrosion resistance. Compared with high manganese steel material under the same conditions, its unit wear is about 1/5 of high manganese steel, and its service life is 4-5 times that of high manganese steel. Compared with polyurethane wear resistant pipe, rare earth alloy wear resistant pipe Cuttable and weldable. Elbow and branch pipes can be used together with seamless pipe sections, making installation and maintenance more convenient, strength, low-alloy, rare.
Rare earth wear-resistant alloy pipes are used in parts with severe wear, such as elbows, reducers, suction ports, etc., which can be cast as a whole, and then machined, especially in the parts where the outer side of the elbow is particularly worn. , The outer diameter is designed with a more central method, so that the parts with severe wear can be locally thickened, and according to various requirements, irregular types of pipe fittings can be produced to meet the design requirements. The straight pipe is formed by centrifugal casting, without air. Shrinkage cavities, slag inclusions and other casting defects. In the actual use process, good results have been achieved in the use of water slag pipelines in steel plants and coal washing pipelines in coal preparation plants.
Application
High-strength low-alloy rare earth wear-resistant steel material is suitable for power plant coal grinding system, pulverizing system, slag removal and ash removal system, coal transportation, powder feeding and dust removal system, transportation, pipeline of heavy medium coal washing system, blast furnace slag removal and transportation of metallurgical system, Pneumatic, pumping slurry and other material conveying pipelines, etc.
High-strength low-alloy rare earth wear-resistant steel
Product properties
The new rare earth wear-resistant alloy tube adopts the new EPC lost foam vacuum suction casting process, which can avoid common casting defects such as pores, slag inclusion, loose organization, and large deformation. The material composition is the original FeCr, FeMn, FeMo, Ni, Re, On the basis of FeSi and other alloy materials, ferrovanadium (FeV), ferroniobium (FeNb) and copper (Cu) are added to make the material not only have the wear resistance of high alloy casting, but also have high mechanical strength and impact resistance. , while improving the weldability of the material.
The material of rare earth wear-resistant alloy steel pipe has strong anti-wear performance. After adding FeV, FeNb, and Cu, the metallographic structure of the material has changed, the grains are finer, the strength is higher, the plasticity is stronger, and the metal The matrix is further passivated, so that the wear resistance of the original material has been improved.
The content of Ni and Cr elements in the alloy directly determines the temperature resistance of the material. The content of Cr element and Cu element determines the corrosion resistance of the material. The reasonable combination of these elements greatly improves the comprehensive performance of the new rare earth wear-resistant alloy steel material and can adapt to various harsh working conditions.
The new EPC lost foam vacuum suction casting process has high dimensional accuracy, uniform material structure and stable performance, especially for straight pipes, special-shaped pipes, unequal wall thickness pipes, eccentric pipes, and conical pipes.
Due to the change of the metallographic structure, the grains of the casting matrix are finer. The advanced technology has eradicated the original phenomenon of pores, slag inclusion and loose tissue. After the medium is transported for a period of time, the inner wall of the pipeline is as smooth as a mirror, which greatly reduces the running resistance of the pipeline, improves the service life of the pipeline, and further improves the wear resistance of the material.
It can be installed by flange, quick connector, direct welding, etc. Due to the addition of FeV, FeNb and Cu, the hardness of the new material is improved through heat treatment, but at the same time, the installation performance of the material such as random cutting, unloading and welding is ensured.
How wear-resistant materials work
Abrasive wear is the most serious form of wear among all kinds of wear, and its essence is the result of the cutting or chiseling effect of hard abrasive particles on the metal surface. The abrasive particles penetrate into the metal surface to produce plastic deformation and wear scars until the metal surface is abraded. The new high-strength rare earth wear-resistant material is developed based on this principle.
Performance table of high strength rare earth alloy wear-resistant steel
| No. | Grade | Yield Strength ≥Mpa | Compressive strength ≥Mpa | Impact J/cm² | Temperature ℃ | Abrasive wear mg/g | Hardness ≥HRC≥HB |
|---|---|---|---|---|---|---|---|
| 1 | JM1 | 790 | 11 | 1100 | 0.026 | 45 | |
| 2 | JM2 | 810 | 9 | 1050 | 0.023 | 51 | |
| 3 | JM3 | 890 | 5 | 300 | 0.021 | 63 | |
| 4 | JM4 | 910 | 16 | 1050 | 0.033 | -600 | |
| 5 | JM5 | 920 | 6 | 530 | 0.042 | 52 | |
| 6 | JM6 | 940 | 10 | 400 | 0.069 | 45 | |
| 7 | JM6A | 730 | 100 | 750 | 0.091 | -210 | |
| 8 | JM6B | 680 | 90 | 760 | 0.096 | -220 | |
| 9 | JM7C | 450 | 690 | 5 | 1150 | 0.041 | 36 |
| 10 | JM7 | 380 | 580 | 12 | 800 | 0.063 | 36 |
| 11 | JM7A | 400 | 530 | 16 | 900 | 0.083 | 34 |
| 12 | JM7B | 420 | 560 | 20 | 950 | 0.89 | 32 |
| 13 | JMB | 590 | 5 | 100 | 0.026 | 52 | |
| 14 | JM19 | 610 | 5.5 | 960 | 0.024 | 50 | |
| 15 | JM10 | 580 | 4.5 | 980 | 0.091 | -441 | |
| 16 | JM11 | 1700 | 10 | 750 | 0.12 | -300 | |
| 17 | JM12 | 980 | 6 | 600 | 0.59 | -460 | |
| 18 | JM13 | 920 | 7 | 850 | 0.039 | 48 | |
| 19 | JM14 | 950 | 7.5 | 450 | 0.064 | 40 |