A kind of sy15mnnicrmovnbti steel and its structural parts preparation method

Abstract

The invention discloses SY15MnNiCrMoVNbTi steel. The SY15MnNiCrMoVNbTi steel consists of the following components in percents by mass: 0.16-0.20 of C, 0.20-0.50 of Si, 1.40-1.60 of Mn, smaller than or equal to 0.025 of P, smaller than or equal to 0.025 of S, 1.00-1.20 of Cr, 0.40-0.60 of Mo, 1.30-1.50 of Ni, 0.05-0.10 of V, 0.03-0.06 of Nb, 0.02-0.20 of Ti, smaller than or equal to 0.006 of B and the balance of Fe, wherein the sum is 100%. The invention further discloses a preparing method of the structural component of the SY15MnNiCrMoVNbTi steel. The material and the steel structural component reach mechanical performance meeting design requirements through adjusting alloy elements and adopting a reasonable thermal treatment technology, so that the requirement on the work environment in which the steel structural component is positioned is met; and the performance indexes of the steel structural component, such as strength, rigidity, stability, cold and hot processing moldability and weldability, are improved, and the service life of the steel structural component is prolonged.

Description

technical field [0001] The invention belongs to the technical field of the metallurgical industry, relates to a SY15MnNiCrMoVNbTi steel, and also relates to a preparation method of the SY15MnNiCrMoVNbTi steel structure. Background technique [0002] In the metallurgical industry, with the development of metallurgical technology, the lack of mineral resources and the development of steel structural parts from riveting technology to welding technology, a class of weldable low-carbon engineering structural steel has gradually emerged. This type of steel has excellent mechanical properties such as lower carbon content, higher yield point or yield strength, better cold and hot forming and good weldability than ordinary carbon structural steel. This type of steel is mainly used in oil and gas transmission pipelines, deep well oil pipes, automobile steel plates, coal mining machinery, construction machinery and other fields. It has great advantages, especially in large-span or hea...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a SY15MnNiCrMoVNbTi steel, which solves the problem that the performance of low-carbon engineering structural steel in the prior art cannot meet higher performance requirements