CN102899583A

CN102899583A - High-performance steel material

Info

Publication number: CN102899583A
Application number: CN2012103333801A
Authority: CN
Inventors: 凌敏
Original assignee: ZHONGHAO VENTURE HIGH-SPEED RAIL NEW TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: ZHONGHAO VENTURE HIGH-SPEED RAIL NEW TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2013-01-30

Abstract

The invention belongs to the field of steel materials and provides a high-performance steel material. The steel material comprises the following elements by weight: 0.06 to 0.11% of C, no more than 0.11% of Si, 0.40 to 0.50% of Mn, no more than 0.018% of P, no more than 0.012% of S, 0.25 to 0.35% of Cr, 0.20 to 0.30% of Ni, 0.20 to 0.30% of Mo, no more than 0.2% of Cu, 0.015 to 0.050% of Al, 0.01 to 0.045% of Ti and no more than 0.050% of As+Sn+Pb+Sb+Bi. The steel material has the advantages of corrosion resistance, high temperature resistance, weldability, good toughness, high strength and good machining properties.

Description

A kind of high performance steel

Technical field

The invention belongs to the steel field, particularly relate to a kind of high performance steel.

Background technology

High performance steel (HPS) refers to that those tensile strength, toughness, weldability, high temperature resistant and corrosion resistance nature are than traditional common iron steel of high-quality more, the application of such grade steel usually can reduce cost, reduces to make up size, alleviates structural weight and reduce the welding operation amount, of paramount importancely be, because the steel of these new grades have improved tensile strength, weather resisteant and endurance quality have also reduced material usage, and the Sustainable development of environment is had very large contribution.

Particularly in the traffic construction applications, not only need to use high-strength material, and also will satisfy simultaneously the requirement of installing and processing, high performance steel (HPS) has fully satisfied these requirements.

The requirement of building along with modern project improves constantly, and is also more and more higher to the requirement of the properties of high performance steel (HPS).

Summary of the invention

In view of above requirement, main purpose of the present invention is to provide a kind of high performance steel, and these steel are corrosion-resistant, high temperature resistant, and weldability is high, and good toughness, intensity are high, and the fatigue property machining property is good.

In order to reach above purpose, this kind high performance steel provided by the invention, the weight percent content scope of each element is as follows: C:0.06～0.11%, Si :≤0.11%, Mn:0.40～0.50%, P :≤0.018%, S :≤0.012%, Cr:0.25～0.35%, Ni:0.20～0.30%, Mo:0.20～0.30%, Cu :≤0.2%, Al:0.015～0.050%, Ti:0.01～0.045%.

Further, the preferred version of this kind high performance steel provided by the invention is that the weight percent content scope of each element is as follows: C:0.06～0.10%, Si :≤0.10%, Mn:0.40～0.50%, P :≤0.018%, S :≤0.010%, Cr:0.25～0.35%, Ni:0.20～0.30%, Mo:0.20～0.30%, Cu :≤0.2%, Al:0.015～0.035%, Ti:0.01～0.04%.

This kind high performance steel provided by the invention, its process for making adopts electric furnace+external refining+VO Fruit storage, above-mentioned technique is all the routine techniques of smelting industry, and the control device of various elements also skillfully grasped by the steel-making company of this area, does not repeat them here.

This kind high performance steel provided by the invention has the following advantages:

1, corrosion-resistant, high temperature resistant;

2, weldability is high;

3, good toughness, intensity are high;

4, fatigue property is high;

5, machining property is good.

Embodiment

Below in conjunction with specific embodiment technical scheme of the present invention is further specified, but does not do restriction to it:

The invention provides a kind of high performance steel, the weight percent content scope of each element is as follows: C:0.06～0.11%, Si :≤0.11%, Mn:0.40～0.50%, P :≤0.018%, S :≤0.012%, Cr:0.25～0.35%, Ni:0.20～0.30%, Mo:0.20～0.30%, Cu :≤0.2%, Al:0.015～0.050%, Ti:0.01～0.045%.As+Sn+Pb+Sb+Bi≤0.050%.

In the component of the present invention, C is main to form carbon compounds with other elements, plays build up and precipitation strength, makes the steel strength increase; As reductive agent and reductor, the combinations such as Si and Mo, Cr are improved erosion resistance and oxidation resistant effect to Si in steelmaking process, when surpassing 0.5%, can cause the toughness of steel to descend, and reduce the welding property of steel; Mn mainly plays solution strengthening and reduces transformation temperature, the effect that improves steel strength; Impurity element P, S equal size roll off the production line and do not limit, and reduce as far as possible under the processing unit ability, and steel is pure to reach, the uniform purpose of mechanical property; Cr can improve hardening capacity and solution strengthening in steel plate, can improve intensity and the hardness of steel under as-heat-treated condition; The Ni Main Function is to increase austenitic condensate depression, thereby thinning microstructure is obtained strengthening effect, can also increase in addition the atmospheric corrosion resistance ability of steel, improves low-temperature impact toughness and reduces Cold Brittleness Transition Temperature; Mo can significantly improve the hardening capacity of steel, can improve temper resistance simultaneously, and the present invention strictly controls the content of Mo, is because if the excessive welding property of steel that then can cause of the content of Mo descends; Cu can obviously improve the erosion resistance of steel plate, improves simultaneously intensity; Al can improve intensity and the hardness of steel; Ti can solidify the N element in steel, tiny TiN particle can effectively hinder the Austenite Grain Growth of steel when heating, and can improve significantly the welding property of steel.Residual element As, Sn in the steel, Pb, Sb, Bi have considerable influence to the performance of steel, and particularly therefore corrosion resistance nature should strictly control its content.

Embodiment 1: a kind of high performance steel, and the weight percent content scope of each element is as follows: C:0.06～0.10%, Si :≤0.10%, Mn:0.40～0.50%, P :≤0.018%, S :≤0.010%, Cr:0.25～0.35%, Ni:0.20～0.30%, Mo:0.20～0.30%, Cu :≤0.2%, Al:0.015～0.035%, Ti:0.01～0.04%, As+Sn+Pb+Sb+Bi≤0.050%.

Below technology contents of the present invention has been done detailed description.For persons skilled in the art, any apparent change of under the prerequisite that does not deviate from the principle of the invention it being done can not exceed the protection domain of the application's claims.

Claims

1. a high performance steel is characterized in that, the weight percent content scope of each element is as follows: C:0.06～0.11%, Si :≤0.11%, Mn:0.40～0.50%, P :≤0.018%, S :≤0.012%, Cr:0.25～0.35%, Ni:0.20～0.30%, Mo:0.20～0.30%, Cu :≤0.2%, Al:0.015～0.050%, Ti:0.01～0.045%, As+Sn+Pb+Sb+Bi≤0.050%.

2. a kind of high performance steel according to claim 1 is characterized in that, the weight percent content scope of each element is as follows: C:0.06～0.10%, Si :≤0.10%, Mn:0.40～0.50%, P :≤0.018%, S :≤0.010%, Cr:0.25～0.35%, Ni:0.20～0.30%, Mo:0.20～0.30%, Cu :≤0.2%, Al:0.015～0.035%, Ti:0.01～0.04%.