Track steel having high strength, high abrasion resistance and long fatigue life, and production process for same

Abstract

The invention discloses a track steel having high strength, high abrasion resistance and long fatigue life, and a production process for the same. The track steel is composed of the following elements in mass percent: 0.28-0.32% of C, 0.20-0.35% of Si, 1.45-1.60% of Mn, 0.35-0.45% of Cr, 0-0.1% of Mo, 0-0.1% of V, 0.015-0.030% of Al, 0-0.025% of P, 0.015-0.030% of S, 0.0010-0.0025% of B, 0.015-0.030% of Ti, 0-0.0015% of O, 0-0.0002% of H, 0.0040-0.0080% of N, and the balance of Fe. As can be seen from the above composition, only some conventional alloy element (0.35-0.45% of Cr) is added to the chemical components of the track steel set forth in the present application to improve the overall mechanical properties of a track, such that the production cost of an enterprise can be greatly reduced while the mechanical properties are guaranteed.

Description

technical field [0001] The invention relates to the field of track steel in the engineering machinery industry, in particular to a track steel with high strength, high wear resistance and high fatigue life and a production process thereof. Background technique [0002] Track steel is widely used in automobiles, machinery and other industries, especially in the field of construction machinery, where it is a very large amount of steel. Under the background of the great development of infrastructure construction in various countries and the steady advancement of the national strategic layout of the “Belt and Road” initiative advocated by my country, the construction machinery industry at home and abroad will usher in an unprecedented period of rapid development. At that time, the demand for track steel will also increase. followed by a further increase. [0003] As the main parts of construction machinery such as bulldozers and excavators, crawler tracks are in direct contact w...

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Problems solved by technology

[0013] (2) Ni, Pb and Sn elements are added to the crawler steel described in the patent with publication number CN103160729B: Ni0.05-0.30%, Pb0.005-0.020%, Sn0.003-0.030%. When smelting steel types, the residual Ni, Pb and Sn elements in the smelting ladle may affect the smelting of other steel types and increase the difficulty of smelting

Publication number is CN103805898A patent and publication number is CN103160729B patent described in the crawler steel that does not list tower hairline as an important technical indicator to go to be controlled

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