Steel plate special for cable bridge and thermal treatment method for steel plate

A heat treatment method and technology for cable trays, which are applied in the field of corrosion-resistant steel and its heat treatment, can solve the problems of serious material consumption, shortened service life of the tray, and heavy weight of the tray, and achieve the effect of good high plasticity and good transverse yield strength.

Inactive Publication Date: 2016-01-20
江苏宇恒电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing bridge bottom plate is a flat structure. In order to achieve the weight of the bridge support cable, the thickness of the bridge bottom plate is often designed to be very thick, the material consumption is serious, the weight of the bridge itself is relatively large, and the bending phenomenon will occur when suspended for a long time, which shortens the use of the bridge. life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment is a special steel plate for cable trays. The composition and mass percentage of the steel plate are: C: 0.52%, Cr: 3.48%, Si: 0.16%, Mn: 0.85%, P: 0.015%, Nb: 0.020% , Ti: 0.008%, V: 0.35%, Mo: 0.11%, Al: 0.15%, Cu: 0.03%, Ni: 0.80%, rare earth elements: 1.15%, the balance is Fe and unavoidable impurities;

[0021] The chemical composition mass percentage of rare earth elements is: Nd: 8%, Ce: 14, Er: 6%, Pr: 6%, Pm: 8%, and the balance is La.

[0022] The heat treatment method of the special steel plate for the cable tray provided in this embodiment includes the following steps:

[0023] (1) Cool the rolled steel in air and then heat it, the heating temperature is 1060-1150°C;

[0024] (2) Quenching treatment in the austenite phase zone, the quenching temperature is 890-950°C, and the quenching holding time is 1.5min / mm×plate thickness. After quenching, the steel has obtained uniformly quenched lath martensite and original austenite grains small;

...

Embodiment 2

[0027] This embodiment is a special high-strength corrosion-resistant steel for anti-theft window frames. The composition and mass percentage of the steel plate are: C: 0.64%, Cr: 3.56%, Si: 0.25%, Mn: 1.1%, P: 0.015% , Nb: 0.041%, Ti: 0.015%, V: 0.65%, Mo: 0.15%, Al: 0.21%, Cu: 0.05%, Ni: 0.82%, rare earth elements: 2.25%, the balance is Fe and unavoidable impurities;

[0028] The chemical composition mass percentage of the rare earth elements is: Nd: 11%, Ce: 15%, Er: 8%, Pr: 7%, Pm: 11%, Dy: 2%, and the balance is La.

[0029] The heat treatment method of the special high-strength corrosion-resistant steel for the anti-theft window frame provided by this embodiment comprises the following steps:

[0030] (1) Cool the rolled steel in air and then heat it, the heating temperature is 1060-1150°C;

[0031] (2) Quenching treatment in the austenite phase zone, the quenching temperature is 890-950°C, and the quenching holding time is 1.5min / mm×plate thickness. After quenching, t...

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Abstract

The invention discloses a steel plate special for a cable bridge. The steel plate comprises, by mass, 0.52%-0.66% of C, 3.48%-3.70% of Cr, 0.16%-0.35% of Si, 0.85%-1.50% of Mn, 0-0.015% of P, 0.020%-0.050% of Nb, 0.008%-0.020% of Ti, 0.25%-0.65% of V, 0.11%-0.18% of Mo, 0.15%-0.35% of Al, 0.03%-0.07% of Cu, 0.80%-0.87% of Ni, 1.15%-2.35% of rare earth elements, and the balance Fe and inevitable impurities. The produced high-strength and corrosion-resistant steel plate special for the cable bridge has good transverse yield strength and high plasticity; the yield strength is 1060-1180 MPa, the tensile strength is 1120-1180 MPa, the ductility is 18%-25%, and minus 40 DEG C low-temperature impact energy is larger than or equal to 75 J.

Description

technical field [0001] The invention relates to a corrosion-resistant steel and a heat treatment method thereof, in particular to a special steel plate for cable bridges and a heat treatment method thereof. Background technique [0002] The cable tray is mainly used for integrated wiring such as power supply supporting power transmission and wired telecommunication transmission, and a supporting member for laying cables. This kind of supporting member is most widely used in the power supply department, power transmission system for centralized power supply and distribution of industrial and mining enterprises, hotels, and comprehensive office facilities, and wired telecommunications. Most of the existing bridge bottom plate is a flat structure. In order to achieve the weight of the bridge support cable, the thickness of the bridge bottom plate is often designed to be very thick, the material consumption is serious, the weight of the bridge itself is relatively large, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C21D6/00
Inventor 周汝飞
Owner 江苏宇恒电气有限公司
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