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Preparation method of 12Cr2Mo1 hot-rolling container steel plate

A steel plate and container technology, which is applied in the field of preparation of 12Cr2Mo1 hot-rolled container steel plates, can solve the problems of low production efficiency, achieve high production efficiency, improve tensile strength and crack growth resistance, and promote nucleation and disperse precipitation.

Inactive Publication Date: 2018-08-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the heat treatment process of 12Cr2Mo1 hot-rolled container steel plate is normalizing + tempering, but the production efficiency of this method is low

Method used

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  • Preparation method of 12Cr2Mo1 hot-rolling container steel plate
  • Preparation method of 12Cr2Mo1 hot-rolling container steel plate
  • Preparation method of 12Cr2Mo1 hot-rolling container steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of 12Cr2Mo1 hot-rolled container steel plate, described preparation method comprises the steps:

[0032] ①Molten steel is smelted according to the designed composition and continuously cast into a 220mm thick slab. The composition by weight percentage is: C0.12%, Si 0.15%, Mn 0.4-0.6%, Cr 2.18%, Mo 1%, Ti 0.03% , P≤0.01%, S≤0.003%, Sn≤0.008%, As≤0.01%, Sb≤0.003%, Pb≤0.01%, N≤0.006%, Fe balance;

[0033] ②Heat the product obtained in step ① to 1200°C and keep it warm for 1 hour. 6 passes, with a total reduction rate of 76.82%; the start rolling temperature of the finish rolling is 920°C, the finish rolling temperature is 850°C, and the rolling is 5 passes, with a total reduction rate of 76%, to obtain a 12mm thick steel plate;

[0034] ③The product obtained in step ② is leveled one by one, and after hot rolling, it is cooled to 600°C with water at a cooling rate of 30°C / s, and then air-cooled to room temperature;

[0035] ④Heat the product...

Embodiment 2

[0039] A kind of preparation method of 12Cr2Mo1 hot-rolled container steel plate, described preparation method comprises the steps:

[0040] ①Molten steel is smelted according to the designed composition and continuously cast into a slab with a thickness of 260mm. The composition is: C0.12%, Si 0.15%, Mn 0.4-0.6%, Cr 2.18%, Mo 1%, Ti 0.03% by weight percentage , P≤0.01%, S≤0.003%, Sn≤0.008%, As≤0.01%, Sb≤0.003%, Pb≤0.01%, N≤0.006%, Fe balance;

[0041] ②Heat the product obtained in step ① to 1200°C, keep it warm for 1.5h, use high-pressure water to remove phosphorus after being released from the furnace, and then carry out two-stage controlled rolling. The rolling is 4 passes, the total reduction rate is 68.85%; the start rolling temperature of the finish rolling is 900°C, the final rolling temperature is 830°C, the rolling is 4 passes, the total reduction rate is 63.75%, and the thickness of 30mm is obtained. steel plate;

[0042] ③The product obtained in step ② is leveled ...

Embodiment 3

[0047] A kind of preparation method of 12Cr2Mo1 hot-rolled container steel plate, described preparation method comprises the steps:

[0048] ①Molten steel is smelted according to the designed composition and continuously cast into a slab with a thickness of 320mm. The composition is: C0.12%, Si 0.15%, Mn 0.4-0.6%, Cr 2.18%, Mo 1%, Ti 0.03% by weight percentage , P≤0.01%, S≤0.003%, Sn≤0.008%, As≤0.01%, Sb≤0.003%, Pb≤0.01%, N≤0.006%, Fe balance;

[0049] ②Heat the product obtained in step ① to 1200°C and keep it warm for 2 hours. 3 passes, the total reduction rate is 57.82%; the start rolling temperature of finish rolling is 880°C, the final rolling temperature is 820°C, the rolling is 3 passes, the total reduction rate is 64.44%, and the 48mm thick steel plate;

[0050] ③The product obtained in step ② is leveled one by one, and after hot rolling, it is cooled to 550°C with water at a cooling rate of 20°C / s, and then air-cooled to room temperature;

[0051] ④Raise the temperatu...

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Abstract

The invention relates to a preparation method of a 12Cr2Mo1 hot-rolling container steel plate, and belongs to the technical field of a metallurgical material. The preparation method comprises the following steps: heating the hot-rolled steel plate to 900 to 940 DEG C, preserving heat for 30 to 50 minutes and performing heat-preserving treatment for the first time; and after performing heat-preserving treatment for the first time, cooling to 670 to 730 DEG C, preserving heat for 20 to 30 minutes, performing heat-preserving treatment for the second time and then cooling to a room temperature after performing heat-preserving treatment for the second time. The continuous heat treatment method is high in production efficiency.

Description

technical field [0001] The invention relates to a preparation method of a 12Cr2Mo1 hot-rolled container steel plate, belonging to the technical field of metallurgical materials. Background technique [0002] With the rapid development of petroleum, chemical and other industries, higher requirements are put forward for 12Cr2Mo1 hot-rolled container steel. 12Cr2Mo1 hot-rolled container steel has good structure and performance stability at medium and high temperature (375-595°C). At present, the heat treatment process of 12Cr2Mo1 hot-rolled container steel plate is normalizing + tempering, but the production efficiency of this method is low. Contents of the invention [0003] The present invention solves the above-mentioned problems by adopting a continuous heat treatment method. [0004] The invention provides a kind of preparation method of 12Cr2Mo1 hot-rolled container steel plate, and described preparation method is: [0005] Heat the hot-rolled steel plate to 900-940°...

Claims

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Application Information

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IPC IPC(8): C21D8/02C22C38/02C22C38/04C22C38/22C22C38/28
Inventor 李长生王期文涂兴洋陈洁陈礼清
Owner NORTHEASTERN UNIV
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