Alloy steel high-temperature-resistant high-pressure-resistant sulfur-resistant throttling valve and manufacturing method
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A sulfur-resistant throttle valve, high temperature and high pressure technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as difficult to achieve yield strength, and achieve the effects of high design safety factor, improved service life, and low material cost
Inactive Publication Date: 2020-05-05
苏州雷格姆海洋石油设备科技有限公司
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In the existing technology, most of the forgings made of F22 material are difficult to achieve 80KSI (552MPa) yield strength after high-temperature post-weld heat treatment (665°C) test performance
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Embodiment 1
[0017] A method for manufacturing a valve body and a valve cover forging in a high-temperature, high-pressure sulfur-resistant throttle valve component, comprising the following process steps:
[0018] A. The components by weight include: C: 0.120-0.135%, Si: 0.20-0.32%, Mn: 0.4-0.55%, P: 0.008-0.010%, S: 0.005-0.008%, Cr: 2.15-2.35%, Ni: 0.2~0.3%, Mo: 0.90~1.00%, Cu: 0.000~0.083%, Ti: 0.001~0.024%, Bi: 0.001~0.005%, Nb: 0.001~0.010%, Al: 0.020~0.040%, Sn : 0.005~0.007%, V: 0.001~0.030%, B: 0.0001~0.0004%, Pb: 0.000~0.006%, As: 0.004~0.010%, Sb: 0.0010~0.010%, Ca: 0.001~0.004%, and the rest Fe steel ingots are used as raw materials for forging billets. The initial forging temperature is ≤1200°C, the holding time is 0.5 hours / inch to 1.5 hours / inch, and the final forging temperature is 850-950°C. The holding time should not be too long to effectively control the grains Dimensions, forging adopts hydraulic press WHF forging method + forging hammer FM forging method to repeatedl...
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Abstract
The invention discloses an alloy steel high-temperature-resistant high-pressure-resistant sulfur-resistant throttling valve and a manufacturing method. The design improvement is performed on the basisof an F22 material component, the initial forging temperature is lower than or equal to 1200 DEG C, the heat preserving time is 0.5-1.5 hours per inch, the final forging temperature is 850-950 DEG C,transverse and longitudinal three-time repeated heading and drawing are performed on a steel ingot through a WHF forging method with a hydraulic machine and an FM forging method with a forging hammerduring forging, and the total forging ratio is larger than 6:1; the normalizing at 950 DEG C, quenching at 930 DEG C and tempering at 663 DEG C are adopted, and the heat preserving time is 1.0-1.5 hours per inch; by means of a Fronius TIG automatic build-up welding technology and a build-up welding Inconel 625 nickel-base alloy, a machining base surface is designed before build-up welding; and cutting machining is performed. The throttling valve has the advantages that a forging technological control and thermal treatment process is optimized, and a high-temperature-resistant high-pressure-resistant sulfur-resistant forging with super-long service life and high safety coefficient and meeting actual use requirements is obtained.
Description
technical field [0001] The invention belongs to the technical field of offshore oil exploitation equipment, and in particular relates to an alloy steel, a high-temperature, high-pressure sulfur-resistant throttle valve and a manufacturing method. Background technique [0002] Equipment used in offshore oil extraction is often damaged by corrosion of parts due to long-term exposure to humid air with salt. Moreover, due to the continuous working status of these equipments, they are impacted by alternating loads and have high requirements on the hardness and strength of parts, so forging methods are often used to manufacture workpieces. The Christmas tree is used as the wellhead control device in deep-sea oil and gas exploration and development. The choke valve is a key component of the Christmas tree. The material and component manufacturing of the high-temperature, high-pressure, and sulfur-resistant choke valve belong to the front-end technology of material application. Aft...
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