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Production method of precision cold-rolled titanium strip for condenser welded pipe

A production method and condenser technology, which are applied in the field of precision cold-rolled titanium steel strips for the production of condenser welded pipes, can solve problems such as increased corrosion of copper alloy pipes and stainless steel pipes, shutdown accidents of power plants, and leakage of condenser pipes. The effect of reducing power plant shutdowns and accidents, good mechanical properties, and strong corrosion resistance

Active Publication Date: 2015-11-11
无锡华生精密材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in coastal power plants that use seawater as cooling water, due to the high content of chloride ions in seawater, sulfide after pollution, and the presence of a large amount of marine organisms and sediment in seawater, the corrosion of copper alloy tubes and stainless steel tubes for condensers is intensified. Copper alloy pipes and stainless steel pipes that were originally usable for 10 years can only be used for 4 years, and some can only be used for 1 to 2 years, with a short service life.
Existence and intensification of corrosion, causing leakage of condenser tubes, resulting in power plant shutdown and accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First select a cold-rolled pure titanium coil with a thickness of 1.0mm, a tensile strength of 332Mpa, and an elongation of 40% as a titanium strip blank for use. Wherein, the titanium strip blank is a TAI-type cold-rolled pure titanium coil with a thickness of 1.0mm produced by Baoti Group.

[0018] Then, use a rolling mill to roll the titanium strip blank with a thickness of 1.0mm into a 0.4mm semi-finished titanium strip at a rolling speed of 60m / min under a rolling force of 300KNKN and a rolling tension of 5KN. However, the surface roughness of the rolls of the rolling mill used was 0.15 μm.

[0019] After that, make the semi-finished titanium strip pass through a continuous degreasing and cleaning unit with a temperature of 60 degrees Celsius at a speed of 90 m / min to remove the grease on the surface of the semi-finished titanium strip.

[0020] Afterwards, use a vacuum furnace with a vacuum degree of 0.0009 Pa and a temperature of 700 degrees Celsius to carry out...

Embodiment 2

[0023] First select a cold-rolled pure titanium coil with a thickness of 1.5mm, a tensile strength of 334Mpa, and an elongation of 40% as a titanium strip blank for use;

[0024] Then, use a rolling mill to roll the titanium strip blank with a thickness of 1.5mm into a 0.7mm semi-finished titanium strip at a rolling speed of 60m / min under a rolling force of 400KN and a rolling tension of 45KN. The surface roughness of the rolls of the rolling mill used was 2.2 μm.

[0025] Afterwards, make the semi-finished titanium strip pass through a continuous degreasing and cleaning unit with a temperature of 70 degrees Celsius at a speed of 110 m / min to remove the grease on the surface of the semi-finished titanium strip;

[0026] Afterwards, use a vacuum furnace with a vacuum degree of 0,0009pa and a temperature of 700 degrees Celsius to carry out vacuum annealing treatment on the cleaned semi-finished titanium strip, so that the surface of the semi-finished titanium strip has no oxidat...

Embodiment 3

[0029] First select a cold-rolled pure titanium coil with a thickness of 2.0mm, a tensile strength greater than 336Mpa, and an elongation of 40% as a titanium strip blank for use;

[0030] Then, use a rolling mill to roll the titanium strip blank with a thickness of 2.0mm into a 0.9mm semi-finished titanium strip at a rolling speed of 60m / min under a rolling force of 500KN and a rolling tension of 80KN. The surface roughness of the rolls of the rolling mill used was 0.3 μm.

[0031] Afterwards, make the semi-finished titanium strip pass through a continuous degreasing and cleaning unit with a temperature of 80 degrees Celsius at a speed of 120 m / min to remove the grease on the surface of the semi-finished titanium strip;

[0032] Afterwards, use a vacuum furnace with a vacuum degree of 0,0009pa and a temperature of 700 degrees Celsius to carry out vacuum annealing treatment on the cleaned semi-finished titanium strip, so that the surface of the semi-finished titanium strip has...

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Abstract

The invention relates to a production method of a precision cold-rolled titanium belt for a condenser welding pipe, and specifically relates to a method for producing a precision cold-rolled titanium steel belt for a condenser welding pipe. The precision cold-rolled titanium belt for a condenser welding pipe is produced from a cold-rolled pure-titanium coil by the steps of semi-finished product rolling, cleaning, vacuum annealing treatment, leveling and straightening and the like. The precision cold-rolled titanium belt produced by the method provided by the invention is processed into a condenser welding pipe, thus the service life is long, leakage of the condenser pipe can be avoided, and the shutdown and accidents of a power plant are reduced.

Description

technical field [0001] The invention relates to a method for producing steel strip. Specifically, it is a method for producing precision cold-rolled titanium steel strips for condenser welded pipes. Background technique [0002] As is well known in the power generation industry, the function of the condenser is to condense the hotter gas into water. Therefore, the condenser is also called the condenser. It is mainly used in the steam turbine power plant and is divided into two types: water-cooled condenser and air-cooled condenser. In addition to condensing the exhaust steam of the steam turbine into water for reuse by the boiler, the condenser can also establish and maintain a vacuum at the exhaust steam of the steam turbine. [0003] At present, most power plants use copper alloy tubes and stainless steel tubes as condenser tubes. However, in coastal power plants that use seawater as cooling water, due to the high content of chloride ions in seawater, sulfide after poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18B21B1/28
Inventor 芮浩清明瑞贞
Owner 无锡华生精密材料股份有限公司
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