Large-thickness 14Cr1MoR steel plate and production method thereof

A 14cr1mor and production method technology, applied in the field of metallurgy, can solve the problems of prolonging the equipment manufacturing cycle, increasing procurement costs, and restricting the development of petrochemical industry, etc., and achieve the effects of reducing the risk of cracks, moderate strength, and good plasticity and toughness

Inactive Publication Date: 2019-12-27
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the very strict requirements on the material itself, only a few foreign manufacturers such as Arcelor in France and JFE in Japan can produce it. In the past, all domestic companies relied on imports. On the one hand, the procurement cycle lasted

Method used

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  • Large-thickness 14Cr1MoR steel plate and production method thereof
  • Large-thickness 14Cr1MoR steel plate and production method thereof
  • Large-thickness 14Cr1MoR steel plate and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In this example, the large-thickness 14Cr1MoR steel plate has a thickness of 80mm, a length of 15000mm, a width of 2200mm, and a unit weight of 16.58t. See Table 1 for its chemical composition and mass percentage.

[0033] The production method of the large-thickness 14Cr1MoR steel plate of this embodiment includes smelting, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0034] (1) Smelting process: use an electric arc furnace for smelting, and when the temperature of the molten steel reaches 1600 ° C, the steel is tapped; then it is sent to the LF refining furnace for refining for 1 hour, and the deep deoxidation method is used for deoxidation, and then Cr, Mo alloy is added and according to In the case of desulfurization, fine-tune the content of Mn, Mo, Ni, Cr, and V to make it meet the composition requirements of large-thickness 14Cr1MoR steel plates. After refining, vacuumize, vacuum degree 40Pa, and...

Embodiment 2

[0048] In this example, the large-thickness 14Cr1MoR steel plate has a thickness of 124mm, a length of 16300mm, a width of 2050mm, and a unit weight of 23t. See Table 1 for its chemical composition and mass percentage.

[0049] The production method of the large-thickness 14Cr1MoR steel plate of this embodiment includes smelting, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0050] (1) Smelting process: use a converter for smelting, and when the temperature of molten steel reaches 1610°C, the steel is tapped; then it is sent to the LF refining furnace for refining for 1.3 hours, and deoxidized by deep deoxidation, and then Cr, Mo alloy is added and according to In the case of desulfurization, fine-tune the content of Mn, Mo, Ni, Cr, and V to make it meet the composition requirements of large-thickness 14Cr1MoR steel plates. After refining, vacuumize, vacuum degree 45Pa, and vacuum treatment for 30 minutes bef...

Embodiment 3

[0064] In this example, the large-thickness 14Cr1MoR steel plate has a thickness of 200mm, a length of 16000mm, a width of 2200mm, and a unit weight of 34.796t. See Table 1 for its chemical composition and mass percentage.

[0065] The production method of the large-thickness 14Cr1MoR steel plate of this embodiment includes smelting, continuous casting, heating, rolling and heat treatment processes, and the specific process steps are as follows:

[0066] (1) Smelting process: use an electric arc furnace for smelting, and when the temperature of the molten steel reaches 1620 ° C, the steel is tapped; then it is sent to the LF refining furnace for refining for 1.2 hours, and deoxidized by deep deoxidation, and then Cr, Mo alloys are added and According to the desulfurization situation, fine-tune the content of Mn, Mo, Ni, Cr, and V to make it meet the composition requirements of large-thickness 14Cr1MoR steel plate. After refining, vacuumize, vacuum degree 50Pa, and vacuum treatm...

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Abstract

The invention discloses a large-thickness 14Cr1MoR steel plate and a production method thereof. The large-thickness 14Cr1MoR steel plate comprises the following chemical components in percentage by mass: 0.12-0.14% of C, 0.5-0.6% of Si, 0.40-0.50% of Mn, 0.006-0.007% of P, equal to or less than 0.005% of S, 1.3-1.5% of Cr, 0.58-0.60% of Mo, 0.10-0.20% of Ni, equal to or less than 0.05% of Nb, equal to or less than 0.20% of Cu, equal to or less than 0.003% of Sb, equal to or less than 0.010% of Sn, equal to or less than 0.010% of As and the balance of Fe and unavoidable impurities. The production method comprises the procedures of smelting, continuous casting, heating, rolling and thermal treatment. According to the production method, the two-stage rolling control technology and the thermaltreatment technology of normalizing and tempering are adopted to solve the problems that the crystal particles are thick, non-uniform, lower in impact toughness and higher in hardness, and the head performance and the tail performance of the steel plate differ widely.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a large-thickness 14Cr1MoR steel plate and a production method thereof. Background technique [0002] With the rapid development of the national economy, the consumption of petroleum in various industries continues to increase, which has accelerated the development of large-scale petrochemical equipment. The petrochemical industry and the coal chemical industry have a substantial increase in the demand for large-thickness Cr-Mo steel plates with a thickness of more than 100mm. Since the refining unit is under high temperature, high pressure and hydrogen exposure conditions for a long time, Cr-Mo steel plate needs to meet the requirements of strength at high temperature, resistance to temper embrittlement and hydrogen corrosion in addition to basic mechanical properties at room temperature. Because of the very strict requirements on the material itself, only a few f...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/48C22C38/42C21D8/02C21D1/28
CPCC21D1/28C21D8/0226C21D8/0263C21D2211/002C21D2211/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/48
Inventor 吴艳阳邓建军龙杰袁锦程李杰赵国昌牛红星李样兵尹卫江王东阳侯敬超瞿征
Owner WUYANG IRON & STEEL
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