CN202152872U - 一种防腐蚀阀门结构 - Google Patents

一种防腐蚀阀门结构 Download PDF

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CN202152872U
CN202152872U CN2011202779854U CN201120277985U CN202152872U CN 202152872 U CN202152872 U CN 202152872U CN 2011202779854 U CN2011202779854 U CN 2011202779854U CN 201120277985 U CN201120277985 U CN 201120277985U CN 202152872 U CN202152872 U CN 202152872U
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corrosion
valve body
valve
welding
valve structure
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饶建红
张政
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ROC-MASTER PIPING SLOUTIONS LTD.
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Shanghai Roc-master Heavy Industry Co Ltd
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Abstract

本实用新型提供了一种防腐蚀阀门结构，其特征在于，包括阀体，所述阀体的内壁设有耐腐蚀合金堆焊层。本实用新型通过在阀体内壁及密封面堆焊一层耐腐蚀合金来提高整个阀体的抗腐蚀性能，既能提高产品的使用性能，也大大降低了生产成本。

Description

一种防腐蚀阀门结构
技术领域
本实用新型涉及一种防腐蚀阀门结构，适用于海上、陆地的石油、天然气的钻采和生产的系统中的石油钻采用阀门。 
背景技术
阀门作为钻采系统中的重要元件，在海上、陆地的石油、天然气的钻采和生产系统中发挥着至关重要的作用。随着世界各国对石油天然气的勘探开发力度的增大，石油钻采系统的工作条件往往变得异常复杂和苛刻，深层油气田含有大量的H2S、CO2、高氯化物等腐蚀介质，对钻采设备具有高腐蚀性，而阀门做为系统中的重要组成必须达到更高的技术要求，耐腐蚀、耐高温、耐氧化等阀门性能就成了必须面对的课题。过去通常的做法是采用高耐腐蚀合金（CRA）来制造阀门，这样虽然起到了一定的防腐作用，但是耐腐蚀合金价格昂贵，既大大提高了生产成本，也在很大程度上造成了材料的大量浪费。在这种情形下，耐腐蚀阀门堆焊技术便应运而生，得到了极其广泛的应用。 
发明内容
本实用新型的目的是提供一种高性能、低成本的防腐蚀阀门结构。 
为了达到上述目的，本实用新型提供了一种防腐蚀阀门结构，其特征在于，包括阀体，所述阀体的内壁设有耐腐蚀合金堆焊层。 
本实用新型通过在阀体内壁及密封面堆焊一层耐腐蚀合金来提高整个阀体的抗腐蚀性能，既能提高产品的使用性能，也大大降低了生产成本。 
附图说明
图1为防腐蚀阀门结构示意图。 
具体实施方式
    下面结合实施例来具体说明本实用新型。 
实施例
     如图1所示，为防腐蚀阀门结构示意图，所述的防腐蚀阀门，包括阀体1，所述阀体1的内壁设有耐腐蚀合金堆焊层2，阀门的其他结构与现有的阀门相同。 
     所述的阀体1采用AISI 4130材料，耐腐蚀合金堆焊层2采用ERNiCrMo-3材料，耐腐蚀合金堆焊层2的厚度约3mm。其制备方法为： 
第一步：堆焊前准备：对阀体以及密封面进行粗加工，并根据图纸要求预留加工余量（3mm），以保证焊层经加工后能够达到指定的尺寸要求。堆焊表面不能有裂纹，夹渣，折叠等有害缺陷，如有上述缺陷需经焊补清除、再粗车后方可堆焊。清除焊条表面的铁锈、油污、氧化物等赃物。焊条需根据实际情况进行烘干处理。
第二步：需要堆焊的表面进行预热处理：预热的目的是为了尽量减少焊接时高温和剧烈的温度梯度造成的有害影响，防止氢致裂纹和改善冶金性能。可以使用氧炔焰、电炉或其他电加热设备加热。预热温度≥150℃，层间温度≤350℃。预热时间根据阀体的大小和形状确定，约为半个小时。确保材料预热均匀。用火焰加热时，火焰不能直接对准待焊表面，而应保持10mm左右的距离，或者从侧面加热。小批量堆焊时用电炉预热较好。预热保温时间不得过长，尽量减少表面氧化。 
第三步：焊接：具体的焊接参数如下：焊接方法：脉冲钨极氩弧焊（GTAW-Pulse），保护气体：Ar；混合比：99.99%；流量：12-16 L/Min；电流：DCEN；电流范围： 190-230A；          电压范围：10-14V；焊接速度：140-220 mm/min；送丝速度：1600-2000 mm/min。 
第四步：焊后热处理：焊后热处理的目的是松弛残余应力，驱除焊缝中的氢气。这样可以有效地防止氢致裂纹，提高材料的延性、韧性、耐腐蚀性和尺寸稳定性。堆焊好的阀体立即放入炉中进行退火处理，加热温度：630℃。保温时间：5小时。 
第五步：检验：将所得的防腐蚀阀体分别进行弯曲试验、化学分析、硬度检测、液体渗透检测以及宏观侵蚀试验，结果如下表： 
Figure 2011202779854100002DEST_PATH_IMAGE002
。

Claims (1)

1.一种防腐蚀阀门结构，其特征在于，包括阀体（1），所述阀体（1）的内壁设有耐腐蚀合金堆焊层（2）。
CN2011202779854U 2011-08-02 2011-08-02 一种防腐蚀阀门结构 Expired - Fee Related CN202152872U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959711A (zh) * 2015-06-15 2015-10-07 河北恒通阀门有限公司 球墨铸铁阀门基体上堆焊不锈钢密封面的工艺
CN114932374A (zh) * 2022-04-06 2022-08-23 豪利机械(苏州)有限公司 压力帽加工焊接工艺

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959711A (zh) * 2015-06-15 2015-10-07 河北恒通阀门有限公司 球墨铸铁阀门基体上堆焊不锈钢密封面的工艺
CN114932374A (zh) * 2022-04-06 2022-08-23 豪利机械(苏州)有限公司 压力帽加工焊接工艺
CN114932374B (zh) * 2022-04-06 2024-01-23 豪利机械(苏州)有限公司 压力帽加工焊接工艺

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