Oil tube electrical heat quenching and tempering thermal treatment method and apparatus

A technology of quenching and tempering heat treatment and heat treatment method, applied in heat treatment furnaces, heat treatment equipment, heat treatment process control and other directions, can solve the problems of unstable processing quality, large environmental pollution, high energy consumption, and achieve balanced four-phase performance of the tube body, reducing The effect of smoke pollution and uniform temperature

Inactive Publication Date: 2008-07-16
JIANGSU FANLI STEEL TUBE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, C95 and P 110 oil casings are generally produced with 28CrMo, 30CrMo and other steel grades, and the cost is high. In addition, coal gas, hydraulic petroleum gas or natural gas furnace is used for quenching and tempering heat treatment. This heat treatment method consumes a lot of energy and causes environmental pollution. Larger, unstable processing quality

Method used

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  • Oil tube electrical heat quenching and tempering thermal treatment method and apparatus
  • Oil tube electrical heat quenching and tempering thermal treatment method and apparatus

Examples

Experimental program
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Effect test

example 1

[0022] Example 1: First, the steel pipe is transported from the feeding rack 16 to a set of quenching furnace 2 for heating at a heating temperature of 850°C through the feeder 1; secondly, the heated steel pipe is transported to a set of cooling furnace 3 through the feeder 1 for spray cooling , the water spray pressure is 8MPa, the water flow rate is 500 cubic meters per minute, the spray time is 10 seconds, and the temperature of the steel pipe after spraying is 100°C; then, after spraying, the steel pipe is then cooled by the cooling rack 17, and then cooled by cooling The material rack 18 is transported to a group of tempering furnaces 4 for heating through the feeder 1 at a heating temperature of 500° C.; finally, the tempered steel pipe is transported to the unloading rack 19 through the feeder 1 . The P110 oil casing with a specification of 60.3×4.83mm produced online has a yield strength of 800Mpa and a tensile strength of 890Mpa.

example 2

[0023] Example 2: First, the steel pipe is transported from the feeding rack 16 to a set of quenching furnace 2 for heating at a heating temperature of 925°C; secondly, the heated steel pipe is transported to a set of cooling furnace 3 through the feeder 1 for spray cooling , the water spray pressure is 9MPa, the water flow rate is 500 cubic meters per minute, the spray time is 13 seconds, and the temperature of the steel pipe after spraying is 100°C; then, after spraying, the steel pipe is then cooled by the cooling and unloading rack 17, and then cooled by cooling. The material rack 18 is transported to a group of tempering furnaces 4 for heating through the feeder 1 at a heating temperature of 650° C.; finally, the tempered steel pipe is transported to the unloading rack 19 through the feeder 1 . The P110 oil casing with a specification of 73.02×5.51mm produced online has a yield strength of 815Mpa and a tensile strength of 875Mpa.

example 3

[0024] Example 3: First, the steel pipe is transported from the feeding rack 16 to a group of quenching furnaces 2 for heating at a heating temperature of 1000°C; secondly, the heated steel pipe is transported to a group of cooling furnaces 3 through the feeder 1 for spray cooling , the water spray pressure is 10MPa, the water flow rate is 500 cubic meters per minute, the spray time is 15 seconds, and the steel pipe temperature is 100°C after spraying; The material rack 18 is transported to a group of tempering furnaces 4 for heating through the feeder 1 at a heating temperature of 800° C.; finally, the tempered steel pipe is transported to the unloading rack 19 through the feeder 1 . The C95 oil casing with a specification of 73.02×5.51mm produced online has a yield strength of 710Mpa and a tensile strength of 805Mpa.

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Abstract

The invention discloses an oil pipe electric-heating quenching and tempering heat process method and a device thereof. At first, a steel pipe is transported from a feeding shelf (16) to a quenching furnace (2) through a delivery machine (1) to be heated up at the heating temperature of 850 DEG C to 1000 DEG C. Secondly, the heated steel pipe is transported to a cooling furnace (3) through the delivery machine (1) for spray cooling. The pressure of the water spray is 8MPa to 10MPa and the water flow is 500 cube meter per min. The spray time is 10 seconds to 15 seconds and the temperature of the steel pipe after being sprayed is 100 DEG C. Then, the steel pipe after being sprayed is transported to a tempering furnace (4) through the delivery machine (1) to be heated up at the heating temperature of 500 DEG C to 800 DEG C. Finally, after tempering the steel pipe is transported to a blanking shelf (19) through the delivery machine (1). The invention adopts the electric-heating quenching and tempering heat processing method and the device to produce the oil casting with high level technology and high added value, thus satisfying the demand for the deep exploitation.

Description

technical field [0001] The invention relates to a heat treatment method and device for an oil pipe, in particular to a heat treatment method and a device for oil pipe electric heating quenching and tempering. Background technique [0002] With the development of the international economy, the demand for oil and natural gas resources is constantly expanding. Due to the continuous increase in crude oil prices, some oil wells with deeper oil layers, higher hydrogen sulfide corrosion, and higher mining costs have also begun to be exploited. The exploitation of such oil wells requires oil casings with special properties such as high steel grade, high sulfur resistance, and corrosion resistance, that is, oil casings with high added value such as API C95 and P 110 of the American Petroleum Institute. . At present, C95 and P 110 oil casings are generally produced with 28CrMo, 30CrMo and other steel grades, and the cost is high. In addition, coal gas, hydraulic petroleum gas or natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/08C21D1/18C21D11/00
Inventor 彭煜严永法李成松程健
Owner JIANGSU FANLI STEEL TUBE
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