吴永法
WU Yongfa

• 1:浙江浙能绍兴滨海热电有限责任公司

摘要(Abstract)：

浙能绍兴滨海热电公司1号机组在2012年大修时,检查发现右侧高压主汽阀阀体内壁靠近进汽滤网导流板部位存在裂纹。通过对裂纹的宏观、金相检查和分析,认为裂纹是在阀门壳体铸件铸造过程或随后的热处理过程中产生的,属于铸造缺陷。给出了焊接修复处理方案及工艺措施,提出了修复投运后的监督检验建议,可为同类型问题的处理提供借鉴。
During the maintenance in Binhai Thermal Power Generation Co., Ltd. in year 2012, a crack was found in the inner wall of right high-pressure main throttle valve of units 1 near skirt the plate of feed-in steam strainer. Based on the visual inspection and metallographic examination of the crack, it is believed that the crack is formed in the manufacturing process, such as casting or subsequent heat-treating. This paper offers the crack repairing scheme and technical measures of welding repair; besides, it brings forward suggestions on supervision and test after the crack is repaired and put into operation, providing reference for the solution to such problems.

关键词(KeyWords)： 汽轮机;主汽阀;内壁;裂纹;分析;焊接
steam turbine;main throttle valve;inner-wall;crack;analysis;weld

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 吴永法
WU Yongfa

DOI: 10.19585/j.zjdl.2015.02.014

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