Method for manufacturing prestress steel strand coated with nichrome powder

A technology of nickel-chromium alloy powder and prestressed steel strand, which is applied in the processing field of steel strand, can solve the problems of reducing the service life of steel bars, wasting manpower and material resources, increasing production costs, etc., so as to improve the strength and reduce the generation of scale. , The effect of improving machinability

Active Publication Date: 2014-03-19
TIANSHUN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the existing technical conditions, when using steel strands, the environment used is extremely harsh. In many cases, there are corrosive gases or liquids, which can easily cause the steel strands to be corroded an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of manufacturing method of nickel-chromium alloy powder coating prestressed steel strand provided by the present embodiment, the method is carried out according to the following steps:

[0033] ⑴ Configure nickel-chromium alloy powder, the chemical composition of nickel-chromium alloy powder by weight percentage is: Re: 0.8%, Ni: 48%, Cr: 18%, Si: 1.6%, S: 0.3%, C: 0.5%, Fe: 10%, Mn: 1.2%, compound rare earth: 1.3%;

[0034] In the composite rare earth, the following components are contained by weight percentage: La: 22%, Y: 12%, Sc: 8%, Gd: 3%, Sm: 5%, Ce: 12%, Pr: 13%;

[0035] (2) Feed multiple wire rods into the heating furnace and heat them to 920°C, keep them warm for 10 seconds, and then pass through the first online cooling process: use water cooling to cool multiple wire rods to 500°C at a cooling rate of 20°C / s, and then Cool with water or quenching liquid in the quenching device to below 80°C, then heat to 600°C for tempering in a tempering furnace, a...

Embodiment 2

[0042] A kind of manufacturing method of nickel-chromium alloy powder coating prestressed steel strand provided by the present embodiment, the method is carried out according to the following steps:

[0043] ⑴ Configure nickel-chromium alloy powder, the chemical composition of nickel-chromium alloy powder by weight percentage is: Re: 2.3%, Ni: 50%, Cr: 26%, Si: 3.2%, S: 0.7%, C: 1.2%, Fe: 13%, Mn: 5%, compound rare earth: 1.6%;

[0044] The composite rare earth contains the following components by weight percentage: La: 25%, Y: 16%, Sc: 10%, Gd: 4%, Sm: 6%, Ce: 14%, Pr: 18%;

[0045] (2) Feed multiple wire rods into the heating furnace and heat them to 980°C, keep them warm for 20 seconds, and then pass through the first online cooling process: use water cooling to cool multiple wire rods to 550°C at a cooling rate of 25°C / s, and then Cool with water or quenching liquid in the quenching device to below 80°C, then heat to 700°C for tempering in a tempering furnace, and then pa...

Embodiment 3

[0052] A kind of manufacturing method of nickel-chromium alloy powder coating prestressed steel strand provided by the present embodiment, the method is carried out according to the following steps:

[0053] ⑴ Configure nickel-chromium alloy powder, the chemical composition of nickel-chromium alloy powder by weight percentage is: Re: 2.3%, Ni: 50%, Cr: 26%, Si: 3.2%, S: 0.7%, C: 1.2%, Fe: 13%, Mn: 5%, compound rare earth: 1.6%;

[0054] The composite rare earth contains the following components by weight percentage: La: 25%, Y: 16%, Sc: 10%, Gd: 4%, Sm: 6%, Ce: 14%, Pr: 18%;

[0055] (2) Feed multiple wire rods into the heating furnace and heat them to 940°C, keep them warm for 15 seconds, and then pass through the first online cooling process: use water cooling to cool multiple wire rods to 530°C at a cooling rate of 22°C / s, and then Cool with water or quenching liquid in the quenching device to below 80°C, then heat to 680°C in a tempering furnace for tempering, and then pa...

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PUM

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Abstract

The invention discloses a method for manufacturing a prestress steel strand coated with nichrome powder. The method for manufacturing the prestress steel strand coated with the nichrome powder comprises the following steps that (1) the nichrome powder comprises, by weight, 0.5-3.2% of Re, 48-54% of Ni, 18-32% of Cr, 1.6-5.5% of Si, 0.3-0.8% of S, 0.5-2.2% of C, 10-16% of Fe, 1.2-10% of Mn, and 1-2.5% of composite rear earth; (2) a plurality of wire rod steel wires are fed into a heating furnace; (3) the nichrome powder is evenly sprayed on the surfaces of the wire rod steel wires through a spray gun; (4) the wire rod steel wires are stranded through a stranding machine to form the steel strand which is of a steel wire rope shape; (5) the steel strand enters a quenching device; (6) the nichrome powder is evenly sprayed on the surface of the steel strand again through the spray gun; (7) the steel strand enters a layer winder to be packaged. According to the method for manufacturing the prestress steel strand coated with the nichrome powder, the strength, wear resistance and corrosion resistance of the steel strand are improved.

Description

technical field [0001] The invention relates to a processing method of a steel strand, in particular to a manufacturing method of a nickel-chromium alloy powder-coated prestressed steel strand. Background technique [0002] At present, in the existing technical conditions, when using steel strands, the environment used is extremely harsh. In many cases, there are corrosive gases or liquids, which can easily cause the steel strands to be corroded and rusted, greatly reducing the strength of the steel bars. service life, and has caused certain safety hazards, increased production costs, wasted a lot of manpower and material resources for maintenance, and wasted a lot of resources. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a method for manufacturing prestressed steel strands coated with nickel-chromium alloy powder in view of the above disadvantages of the prior art, so as to realize the coating of a layer of ...

Claims

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Application Information

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IPC IPC(8): B22F1/00C23C4/06C23C4/16C21D1/18D07B1/06D07B7/14
Inventor 吴海洋姚圣法
Owner TIANSHUN GROUP
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