Preparation method for wear-resistant alloy steel

Abstract

The invention discloses a preparation method for wear-resistant alloy steel. The wear-resistant alloy steel contains the following components by weight percent: 0.4 to 0.6 percent of C; 1.0 to 1.2 percent of B; 1.8 to 2.2 percent of Si; 2.4 to 2.8 percent of Cr; 1.3 to 1.5 percent of Mn; 0.08 to 0.12 percent of Ce; 0.2 to 0.3 percent of V; 0.03 to 0.15 percent of Ti; 0.005 to 0.01 percent of N; 0 to 0.05 percent of P; 0 to 0.05 percent of S; and Fe in balancing amount. The preparation method comprises the following steps: melting molten steel, adjusting the components before a furnace to be qualified, and heating to 1580 to 1600 DEG C; adding aluminum for de-oxygenation, wherein the quantity of the added aluminum is 0.15 to 0.30 percent that of the molten steel, and discharging; conducting combined modification on the molten steel with cerium-based tombar thite, ferrotitanium and ferrovanadium; casting the molten steel into casts after the modification; after austenitizing for 2 to 4 hours under the condition of 960 to 980 DEG C, conducting isothermal quenching on the casts directly in an isothermal salt bath furnace of which the temperature ranges from 310 to 330 DEG C; insulating for 2 to 4 h; and conducting air cooling on the casts to ensure that the temperature of the casts is the same as the room temperature.

Description

technical field [0001] The invention relates to the field of iron and steel, in particular to a preparation method of wear-resistant alloy steel. Background technique [0002] Wear and tear is ubiquitous in many industrial sectors and has become an important cause of equipment failure or material damage, while it also consumes a lot of energy and materials. Various engineering excavator and loader bucket teeth, various wear-resistant conveying pipes, various crusher hammers and jaw plates, and various track shoes made of wear-resistant alloy cast steel, due to high-strength, severe weather and other work conditions, the wear is more serious. [0003] The current technical status is: one is to emphasize the high toughness of the material, and the other is to emphasize the wear resistance of the material. And can't reach an effective unification, especially be used for the application on engineering machinery such as outdoor mining, excavation. The wear resistance of high m...

AI Technical Summary

Problems solved by technology

However, it is impossible to achieve an effective unification, especially in the application of outdoor mining, excavation and other construction machinery.

The wear resistance of high manganese steel is conditional, and its yield strength is low and easy to deform; low and medium alloy wear resistant steel has better strength and toughness, and its wear resistance under low and medium impact loads is better than that of high manganese steel , but there are problems of low hardenability and hardenability, and poor wear resistance; the structure of high-chromium cast iron contains more than 20% of high-hardness eutectic carbides, which has excellent wear resistance, but there are high content of alloying elements, High production cost and high temperature heat treatment are prone to deformation and cracking; ordinary white cast iron and low alloy white cast iron have low hardness, carbides are distributed continuously, and are brittle. They are easy to peel off or even crack during use.