Study on Microstructure and Properties of New High-Strength Wear-Resistant Steel
Keywords: High-strength wear-resistant steel, microstructure, mechanical properties
1 Introduction
High strength wear-resistant steel (HWRS) has been widely used in the manufacture of drilling tools, mining tools, agricultural tools, as well as construction and engineering tools. With the continuous improvement of HWRS performance, its application range is gradually being expanded. Compared with other materials, HWRS has excellent wear resistance, high strength, low deformability, and good toughness, making it an ideal material for the development of high-efficiency tools.
For the development of HWRS, research on the impact of microstructure and properties has been intensified. The new kind of HWRS was studied in this paper. The microstructure and properties of HWRS were discussed in this article to provide a comparative basis for future research.
2 Experimental
2.1 Materials and Processing
The main components of the new HWRS are 0.4C-4.4Si-2.2Mn-1.5Cr-0.7Mo-0.2V (wt%). New HWRS samples were fabricated by the hot-rolling route.
2.2 Microstructure
Shows the microstructure of the new HWRS. The microstructure of new HWRS exhibits lath martensitic structure, which is composed of fine δ ferrite and a large amount of granular cementite.
2.3 Mechanical Properties
Table 1 shows the mechanical properties of the new HWRS. The tensile strength of new HWRS reaches 1250 MPa and its hardness is up to HRC 62. The wear resistance of the new HWRS is 11 times that of common low alloy steel.
Table 1: Mechanical properties of new HWRS
3 Discussion
In order to ensure the high wear resistance of the new HWRS, the microstructure was finely divided. This structure is characterized by its fine lath martensitic structure. It is not only conducive to its excellent wear resistance, but also has a certain relationship with its good toughness. The grain size and the absolute area of the grain boundary both play an important role in the plastic deformation mechanism and the strength of the material. The increase of microstructure area contributes to the increase of dislocation density and the plastic deformation of the material.
4 Conclusion
In this paper, a new kind of high-strength wear-resistant steel was studied. Its microstructure and properties were discussed. The research results show that the new HWRS can achieve a tensile strength of up to 1250MPa, a hardness of HRC62, and a wear resistance of 11 times that of common low alloy steel. Besides, the high-temperature strength and resistance of the new high-strength wear-resistant steel can be further improved.
In future research, it is necessary to focus on the optimization of the new HWRS microstructure, combine heat treatment and process technology. The improvement of performance will lay foundations for the wider application of new high-strength wear-resistant steel in the manufacture of engineering tools.
Conatct us
