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Alloy steel for temperature sensor and preparation method of alloy steel

A temperature sensor and alloy steel technology, applied in the field of sensor materials, can solve problems such as economic loss, severe internal erosion, and environmental pollution

Inactive Publication Date: 2017-05-31
ANHUI RUIXIN AUTOMATION INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Alloy steel has been widely used in sensors, steel pipes and other fields; in the use of temperature sensors, it is often used to make protective tubes for sensors, but in some high-temperature occasions, such as measuring the mixed temperature of primary wind coal powder, coal grinding, etc. Due to the strong corrosion of sulfide at the same time, the temperature sensors at the measuring points such as the slag cooler of the machine and the temperature of the flue gas inlet and outlet are extremely scoured inside, and the existing alloy steel protection tube is easily damaged during operation, causing the temperature sensor The service life is short, once the temperature is out of control, it will cause inestimable environmental pollution and economic loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] An alloy steel for a temperature sensor proposed by the present invention, its chemical composition includes by weight percentage: W+Mo: 4.5%, Mn: 1.5%, V: 2.3%, Ti: 0.1%, C: 2%, Cr: 6 %, B: 2%, Al: 2.8%, Nb: 0.02%, La+Ta: 0.13%, and the balance is iron.

[0016] The invention also proposes an alloy steel for the temperature sensor, which includes the following steps: adding various raw materials into an electric furnace to melt to obtain molten steel, and obtaining a steel billet after pouring, keeping the steel billet at 1150°C for 2 hours, and then heating the steel billet at a temperature of 85°C Cool for 35 minutes, then hold at 950°C for 30 minutes, heat to 550°C after tempering at 670°C, hold for 5 hours, take out of the furnace and cool to room temperature to obtain the alloy steel for the temperature sensor.

Embodiment 2

[0018] An alloy steel for a temperature sensor proposed by the present invention, its chemical composition includes by weight percentage: W+Mo: 5.5%, Mn: 0.8%, V: 3.5%, Ti: 0.01%, C: 3.5%, Cr: 3 %, B: 4%, Al: 1%, Nb: 0.15%, La+Ta: 0.05%, and the balance is iron.

[0019] The invention also proposes an alloy steel for the temperature sensor, which includes the following steps: adding various raw materials into an electric furnace to melt to obtain molten steel, and obtaining a steel billet after pouring, keeping the steel billet at 1100°C for 3.5h, and then heating the steel billet at a temperature of 60°C Cool down for 55 minutes, then hold at 930°C for 50 minutes, temper at 630°C, heat to 580°C, hold for 3 hours, take out of the furnace and cool to room temperature to obtain the alloy steel for the temperature sensor.

Embodiment 3

[0021] An alloy steel for a temperature sensor proposed by the present invention, its chemical composition includes by weight percentage: W: 1.45%, Mo: 3.36%, Mn: 0.9%, V: 2.38%, Ti: 0.05%, C: 2.4%, Cr: 5.6%, B: 2.4%, Al: 1.3%, Nb: 0.13%, La: 0.05%, Ta: 0.07%, and the balance is iron.

[0022] The invention also proposes an alloy steel for the temperature sensor, which includes the following steps: adding various raw materials into an electric furnace to melt to obtain molten steel, and obtaining a steel billet after pouring, keeping the steel billet at 1140°C for 2.3h, and then heating the steel billet at a temperature of 80°C Cool down for 38 minutes, then keep it at 946°C for 36 minutes, heat it to 558°C after tempering at 665°C, hold it for 4.7 hours, take it out of the furnace and cool it to room temperature to obtain the alloy steel for the temperature sensor.

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Abstract

The invention discloses alloy steel for a temperature sensor. The alloy steel comprises the following chemical components in percentage by weight: 4.5-5.5% of W and Mo, 0.8-1.5% of Mn, 2.3-3.5% of V, 0.01-0.1% of Ti, 2-3.5% of C, 3-6% of Cr, 2-4% of B, 1-2.8% of Al, 0.02-0.15% of Nb, 0.05-0.13% of La and Ta and the balance of iron. The invention further provides a method for preparing the alloy steel for the temperature sensor. The process is simple, the process parameters are reasonable, the prepared alloy steel has the characteristics of high strength, high temperature resistance and excellent corrosion resistance, and the service life of the temperature sensor can be prolonged when the prepared alloy steel is used in the temperature sensor.

Description

technical field [0001] The invention relates to the technical field of sensor materials, in particular to an alloy steel for a temperature sensor and a preparation method thereof. Background technique [0002] Alloy steel has been widely used in sensors, steel pipes and other fields; in the use of temperature sensors, it is often used to make protective tubes for sensors, but in some high-temperature occasions, such as measuring the mixed temperature of primary wind coal powder, coal grinding, etc. Due to the strong corrosion of sulfide at the same time, the temperature sensors at the measuring points such as the slag cooler of the machine and the temperature of the flue gas inlet and outlet are extremely scoured inside, and the existing alloy steel protection tube is easily damaged during operation, causing the temperature sensor The service life is short, and once the temperature is out of control, it will cause inestimable environmental pollution and economic losses. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32C22C37/06C22C37/10C21D1/18C21D1/28C21D5/00C21D6/00
CPCC22C38/04C21D1/18C21D1/28C21D5/00C21D6/002C21D6/005C22C37/06C22C37/10C22C38/005C22C38/06C22C38/22C22C38/24C22C38/26C22C38/28C22C38/32
Inventor 高凤谊
Owner ANHUI RUIXIN AUTOMATION INSTR