1. High manganese steel series: such as high manganese steel (ZGMn 13), KNMn 19Cr2 (patent) high manganese alloy (ZGMn 13Cr2MoRe), ultra-high manganese alloy (ZGMn 18Cr2MoRe), etc.
Second, wear-resistant chromium cast iron series: such as high, medium and low chromium alloy cast iron (Cr15mozcu);
Third, wear-resistant alloy steel series: such as medium-low-carbon, high-carbon and multi-element alloy steel (such as ZG49SiMnCrMo and ZG35 Cr2MONE);
Fourth, Adi series.
5. Various composite or gradient materials and cemented carbide materials, KN nano-alloy (patented products): such as chromium carbide composite material (Cr2C3=Q235), high-energy ion-implanted tungsten carbide material (WCSP), high-toughness cemented carbide (YK25.6), KN999 nano-alloy, etc.
Question 2: What are the wear-resistant materials? What are the characteristics and applications of wear-resistant materials? At present, China's general wear-resistant materials have the following series:
1. High manganese steel series: such as high manganese steel (ZGMn 13),
High manganese alloy (ZGMn 13Cr2MoRe), ultra-high manganese alloy (ZGMn 18Cr2MoRe), etc.
2. Wear-resistant chromium cast iron series: such as high, medium and low chromium alloy cast iron (such as Cr15mozcu);
3. Wear-resistant alloy steel series: such as medium-low-carbon, high-carbon multi-element alloy steel (such as ZG40SiMnCrMO, ZG35Cr2Monire);
Fourth, Adi series;
Fifth, various composite or gradient materials and cemented carbide materials, such as chromium carbide composite (Cr2C3+Q235), high-energy ion-implanted tungsten carbide (WCSP) and high-toughness cemented carbide (YK25.6). Sixth, various nonmetallic wear-resistant materials, such as polymeric ceramic composites, silicon nitride (Si3N4), toughened zirconia (Y2O3+ZrO2), toughened alumina (Al2O3/ZrO2), etc. Performance comparison of different series of wear-resistant materials;
2.2. 1 high manganese steel series: its representative is high manganese steel ZGMn 13. Under severe impact or contact stress, its surface will harden rapidly, while the core still maintains extremely high toughness, and its external hardness and internal toughness have both wear resistance and impact resistance. Moreover, the heavier the impact on the surface, the more sufficient the surface hardening and the better the wear resistance. Because the hardness of high manganese steel itself is very low (HB 170-230), the wear resistance without hardening is extremely limited. If the impact force on the surface of high manganese steel is insufficient, the surface can not be fully hardened (the surface hardness after full hardening can reach more than HB550, otherwise it will be below HB350), and the wear resistance will not be exerted, showing a state of no wear.
2.2.2 Wear-resistant high chromium cast iron series: Chromium cast iron can be divided into three categories according to structure and use: the first category is chromium white cast iron with good high temperature performance. The chromium content of this cast iron is 33%, and the structure is mostly austenite and iron-chromium carbide, and sometimes ferrite appears. The alloy not only has certain wear resistance, but also has good oxidation resistance at high temperature not higher than 1050℃. The second type is chromium-based white cast iron with good wear resistance (referred to as high chromium cast iron). This cast iron not only contains 12 ~ 20% chromium, but also contains a proper amount of molybdenum. The solidification structure of this casting is (Fe, Cr)7C3 carbide and γ phase. When the matrix is all martensite, the alloy has the best wear resistance. If there is retained austenite in the matrix, heat treatment is usually needed. The third is low chromium alloy white cast iron. Compared with ordinary white cast iron, the stability of carbides in this cast iron is better. [2]
2.2.3 Wear-resistant alloy steel series: divided into low alloy steel, medium alloy steel and high alloy steel. The impact toughness and hardness of wear-resistant alloy steel can be obtained by adjusting chemical composition and heat treatment process. The hardness can reach HRC = 52 ~ 58, and the toughness can reach AK = 15 ~ 30J/cm2.
2.2.4 ADI series: The matrix structure of ductile iron is transformed from ferrite and pearlite to austenite, bainite and retained austenite by isothermal quenching heat treatment or adding alloying elements. ADI has the following unique advantages: ① high strength and good plasticity. ② High dynamic load performance such as bending fatigue and contact fatigue. The rotational bending fatigue strength of ADI can reach 400 ~ 500 MPa, which is equivalent to that of quenched and tempered low alloy steel. The contact fatigue strength of ADI can reach 1600 ~ 2 100 MPa, which is higher than that of low alloy steel treated by nitriding and carburizing. ③ Good shock absorption. Due to the low elastic modulus and the existence of graphite balls in the matrix, ADI can quickly absorb vibration, increase noise damping, and make the operation of components more quiet and stable. ④ Excellent abrasion resistance and abrasion resistance. ADI's wear resistance is better than any steel with the same hardness grade. ⑤ Good machinability: Most of ADI's machining can be completed before isothermal quenching. At this time, it is generally ferritic ductile iron, and its machinability is obviously better than that of steel.
2.2.5 Composite or gradient material series: it is represented by high energy ion implantation tungsten carbide material (WCSP) and chromium carbide composite material (Cr2C3+Q235). Tungsten Carbide Infiltration Material (WCSP) is a high-energy ion implantation technology for infiltrating tungsten carbide (WC) into the surface of steel parts. WC and steel matrix are metallurgically combined and have complementary advantages. Tungsten carbide with high hardness and wear resistance on the surface. The heart was preserved ... >>
Question 3: What is the most wear-resistant steel? Effect of 1. carbide on properties of high manganese steel
Reduce impact toughness and tensile strength
2. Effect of nonmetallic inclusions on properties of high manganese steel
When molten steel solidifies, a large amount of manganese oxide precipitates in the form of nonmetallic inclusions on the periphery of steel, which reduces the impact toughness of steel and increases the tendency of hot cracking of castings.
3. Selection of chemical composition of high manganese steel and its influence on properties.
When the carbon content in (1) steel with carbon content and manganese content is too low, it is not enough to produce effective work hardening effect; When the carbon content is too high, a large number of carbides, especially coarse carbides, will appear as cast. Therefore, in order to avoid carbide precipitation, the carbon content must be controlled not to be too high.
In order to ensure the performance of high manganese steel, there must be enough manganese content. When the manganese content is too low, a single austenite structure cannot be formed; However, too high manganese content is unnecessary. Generally speaking, WMn is controlled at11.0% ~14.0%, and WC is controlled at 0.9% ~ 1.3%. It should be pointed out that the manganese content and carbon content should be properly matched, that is, there should be an appropriate manganese-carbon ratio, which is generally controlled at Mn/C= 10.
(2) The specification content of high manganese steel containing silicon Wsi is 0.3% ~ 0.8%. Silicon will reduce the solubility of carbon in austenite, promote carbide precipitation and reduce the wear resistance and impact toughness of steel, so the silicon content should be controlled at the lower limit of the specification.
(3) The specification content of phosphorus-containing high manganese steel is Wp≤0.7%. When smelting high manganese steel, the phosphorus content of ferromanganese is relatively high, so the phosphorus content in steel is generally high. Because phosphorus will reduce the impact toughness of steel and make castings easy to crack, the phosphorus content in steel should be reduced as much as possible.
(4) The specification of high manganese steel with sulfur content requires Ws≤0.05%. Because of its high manganese content, most of the sulfur and manganese in steel combine with each other to form manganese sulfide (MnS), so the sulfur content in steel is often low (generally less than 0.03%). Therefore, the harmful effect of sulfur in high manganese steel is higher than that of phosphorus.
Question 4: What kind of steel is not a high temperature material with wear resistance of 100 degrees? It has little effect on metals. In addition, the hardness of 45# steel at HRC50 degree is relatively high, but it has toughness. I think your job gap may not be big, but it was in the running-in period. Should be idle, low speed, relax the assembly gap, and naturally adjust the gap after running-in. Reduce wear. Run-in to reduce friction, wear 0.5 in 30 hours. I think it's the mold fit, parallelism and concentricity, which has little to do with the material. For example, there are uneven burrs on the gear and the flat plate is constantly rubbed. If the hardness of the flat plate is too high, the storage gear will be damaged. Your machine has a low gear of 120 rpm. The quality will not be very good. 42CRMO, it is enough to make common plates.
Question 5: What are the wear-resistant metal materials? Wear-resistant metal materials are as follows:
1, chromium carbide wear-resistant metal materials, such as chromium carbide wear-resistant steel plate produced by Monet Technology Company in Beijing.
2. High manganese steel wear-resistant materials, such as knmn 19cr2.
3. Tungsten carbide metal wear-resistant materials, such as jp8000 sprayed tungsten carbide coating.
Question 6: What is the material of steel? There are many kinds of wear-resistant steel, which can be generally divided into high manganese steel, medium-low alloy wear-resistant steel, Cr-Mo-Si manganese steel, cavitation-resistant steel, wear-resistant steel and special wear-resistant steel. Some common alloy steels, such as stainless steel, bearing steel, alloy tool steel and alloy structural steel, are also used as wear-resistant steels under certain conditions. Because of its convenient source and excellent performance, it also occupies a certain proportion in the use of wear-resistant steel.
Medium-low alloy wear-resistant steel usually contains chemical elements such as silicon, manganese, chromium, molybdenum, vanadium, tungsten, nickel, titanium, boron, copper and rare earth. The linings of many large and medium-sized ball mills in the United States are made of Cr-Mo-Si-Mn or Cr-Mo steel, and their chemical compositions are shown in table 1. Most grinding balls in the United States are made of medium and high carbon Cr-Mo steel, and their chemical composition, heat treatment and hardness are shown in Table 2. Wear-resistant steel, such as Cr-Mo-V, Cr-Mo-V-Ni or Cr-Mo-V-W alloy, can be used for workpieces working under abrasive wear conditions at higher temperatures (such as 200-500℃), or workpieces whose surfaces are subjected to higher temperatures due to frictional heat. After quenching, these steels will have secondary hardening effect when tempered at medium and high temperature. Table 3 lists the chemical composition and application range of low-alloy wear-resistant steels of Si-Mn, Cr-Mn-Si-Mo and Cr-Mn-Mo series used to manufacture ball mill liners in China.
Question 7: What kind of stainless steel is wear-resistant? Model: 4 10 (martensite high-strength chromium steel), 440 (martensite high-strength cutting tool steel), 630 (martensite precipitation hardening stainless steel)
Question 8: What metal material is more wear-resistant than 45# steel? Can 15CrMn！ After normal heat treatment, the wear resistance of 15CrMn is better than that of 45 steel.
Generally, the alloy elements such as carbon, manganese, chromium and titanium in steel have good wear resistance.
It depends on the environment you use, the size of the parts you make and so on.
If welding is needed, the carbon content should not be too high, and increasing the carbon content will reduce the toughness and weldability.
Steel with better wear resistance than 45 steel;
Low carbon alloy steel: 40Cr
Tool and die steel: gcr15t10t12t8.
High manganese steel: except cast iron; Such as ductile iron.
Effect of heat treatment and surface treatment on wear resistance.
Surface quenching and hard chromium plating can also improve the surface hardness, thus improving the wear resistance.
The surface of 20CrMnTi is carburized, and the wear resistance of 38CrMoAl is also very good.