The invention discloses high-strength alloy steel, a preparation method and application of the high-strength alloy steel in heavy engineering machinery thrust wheels, belongs to the technical field of alloy steel, and is characterized in that the high-strength alloy steel comprises the following main chemical components (wt%): 0.28-0.52 wt% of C, 0.13-0.46 wt% of Si, 0.40-2.60 wt% of Mn, 0.50-1.70 wt% of Cr, 0.1-0.30 wt% of Mo, 0.0005-0.005 wt% of B, 0.01-0.08 wt% of Ti, 0.01-0.06 wt% of V, 0.015-0.045 wt% of Al, less than or equal to 0.01 wt% of P, less than or equal to 0.01 wt% of S and the balance of Fe; the sum of the contents of all the components is 100%, and the thrust wheel blank is subjected to salt bath or water mist spraying or air blowing cooling treatment. The method has the beneficial effects that an isothermal needle-shaped lower bainite and martensite matrix structure is obtained through the forging process, waste heat isothermal quenching and unique Mn, B and Mo chemical composition proportion, the core and the surface have the same strength and hardness, the strength and hardness are further greatly improved through nanoscale VN, VC and V (C, N) precipitation, and the strength and the hardness are greatly improved. And the thrust wheel has better overall wear resistance, so that the thrust wheel can meet the application requirements of various types of heavy engineering machinery thrust wheels.
本发明公开了高强度合钢和制备方法及在重型工程机械支重轮的应用,属于合金钢领域技术领域,其特征在于:所述高强度合金钢的主要化学成分(wt%)如下:C:0.28~0.52,Si:0.13~0.46,Mn:0.40~2.60,Cr:0.50~1.70,Mo:0.1~0.30,B:0.0005~0.005,Ti:0.01~0.08,V:0.01~0.06,Al:0.015~0.045,P≤0.01,S≤0.01,余量:Fe;各成分含量的总和为100%,将上述支重轮毛坯,采用盐浴或喷水雾或吹风冷却处理。本发明的有益效果是:通过锻造工艺以及余热等温淬火,与独特的Mn、B和Mo化学成分配比,获得了等温针状下贝氏体+马氏体基体组织,心部和表面具有相同的强度和硬度,通过纳米级的VN、VC和V(C,N)析出,进一步地极大的提升了强度和硬度,使支重轮具有更好的整体耐磨性能,从而适配各种类型的重型工程机械支重轮的应用需求。
High-strength alloy steel, preparation method and application of high-strength alloy steel in heavy engineering machinery thrust wheel
一种高强度合金钢和制备方法及在重型工程机械支重轮的应用
11.10.2024
Patent
Elektronische Ressource
Chinesisch
IPC: | C22C Legierungen , ALLOYS / B21K MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS , Herstellen von Schmiede- oder Presserzeugnissen aus Metall, z.B. Hufeisen, Nieten, Bolzen oder Rädern / B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS |
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