Thick chromium-molybdenum steel plate for hydrogenation equipment and production method thereof

A technology of hydrogenation equipment and production methods, applied in metal processing equipment, rolling mill control devices, metal rolling, etc., can solve the problems of large-thickness steel plates that cannot meet performance parameters and performance degradation, and achieve low cost, high strength, steel pure effect

CN102181806BInactive Publication Date: 2013-01-02WUYANG IRON & STEEL +1
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-01-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention discloses a thick chromium-molybdenum steel plate for hydrogenation equipment, and also discloses a production method of a steel plate. The steel plate comprises the following components by weight percent: 0.12%-0.15% of C, 0.02%-0.07% of Si, 0.50%-0.60% of Mn, less than or equal to 0.007% of P, less than or equal to 0.005% of S, 2.35%-2.50% of Cr, 0.95%-1.10% of Mo, 0.012%-0.02% ofNb, less than or equal to 0.20% of Cu, less than or equal to 0.20% of Ni, less than or equal to 0.003% of Sb, less than or equal to 0.005% of Sn, less than or equal to 0.016% of As, less than or equal to 0.003% of O, less than or equal to 0.008% of N and less or equal to 0.0002% of H, the balance of Fe and inevitable impurities. For the steel plate, an electroslag remelting technology is adopted,electroslag ingot with the maximum piece weight being 50t is melted, and the maximum thickness of the produced thick chromium-molybdenum steel plate for the hydrogenation equipment can achieve 198mm,and the maximum piece weight of the single-piece finished steel plate can achieve 37.2t by a heating-rolling technology and thermal-processing production equipment of normalizing plus accelerated cooling plus tempering.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of iron and steel, in particular to a large-thickness chromium-molybdenum steel plate for hydrogenation equipment and a production method thereof. Background technique

[0002] In recent years, the development of the petrochemical industry has mainly revolved around secondary deep processing of oil products and large-scale installations, marked by the application of hydrogenation technology. The service conditions of steel plates for hydrogenation equipment are harsh, and the steel plates have been exposed to high temperature, high pressure and hydrogen for a long time. Therefore, in addition to the basic mechanical properties at room temperature, the steel plate materials must also meet the strength at high temperature, resistance to temper embrittlement and hydrogen corrosion requirements. Due to the rapid development of my country's petrochemical industry and the large-scale equipment in recent years, t...

Examples

Embodiment 1

[0023] The large-thickness chromium-molybdenum steel plate for hydrogenation equipment in this embodiment is composed of the following components in weight percentage: C 0.13%, Si 0.06%, Mn 0.53%, P 0.005%, S 0.002%, Mo 0.98%, Ni 0.12 %, Cr 2.37%, Nb 0.013%, O 0.003%, N 0.007%, As 0.005%, Sn 0.002%, Sb 0.001%, Cu 0.05%, and the balance is Fe and unavoidable inclusions. The J coefficient of the large-thickness chromium-molybdenum steel plate for hydrogenation equipment in this embodiment is 41.3, the P+Sn content is 0.007%, and the thickness of the steel plate is 198mm.

[0024] The production method of the large-thickness chromium-molybdenum steel plate for the hydrogenation equipment of the present embodiment, the specific steps are:

[0025] (1) Smelting steps: Electroslag remelting is used for smelting. First, 100T ultra-high power electric arc furnace is used for smelting. During the melting period, a large amount of slag is used for slag flow operation, vacuum decarburiza...

Embodiment 2

[0029] The large-thickness chromium-molybdenum steel plate for hydrogenation equipment in this embodiment is composed of the following components in weight percentage: C 0.12%, Si 0.05%, Mn 0.52%, P 0.007%, S 0.003%, Mo 1.00%, Ni 0.12 %, Cr 2.35%, Nb 0.011%, O 0.002%, N 0.006%, As 0.008%, Sn 0.005%, Sb 0.001%, Cu 0.04%, the balance is Fe and unavoidable inclusions, the hydrogenation of this embodiment The J coefficient of the large thickness chromium molybdenum steel plate for equipment is 68.4, the P+Sn content is 0.012%, and the thickness of the steel plate is 195mm.

[0030] The production method of the large-thickness chromium-molybdenum steel plate for the hydrogenation equipment of the present embodiment, the specific steps are:

[0031] (1) Smelting steps: Electroslag remelting is used for smelting. First, 100T ultra-high power electric arc furnace is used for smelting. During the melting period, a large amount of slag is used for slag flow operation, vacuum decarburiza...