第四部分 渗透探伤(PT)检验

1、第四部分 渗透探伤（PT）检验4 PT TEST1.适用范围1, SCOPE本工艺规程适用于公司所生产的铸件壳体、零部件的开口性缺陷检测和评定。The technological specification is applied to open defect test and evaluation of casting shell and parts manufactured.2.编制依据2. BASIS OF COMPILATION2.1无损检测人员资格鉴定与认证GB/T9445；2.1 Qualification and certification for NDT GB/T9445；2.2

2、承压设备无损检测JB/T4730.5；2.2 NDT of Pressure equipments JB/T4730.5；2.3铸钢件渗透探伤及质量评级方法GB9443；2.3 Steel casting penetrant test and quality rating method GB9443；2.4 公司阀门设计制造规程；2.4 Design and manufacture specification of corporate valves; 2.5 本公司无损检测工艺和相关管理规定。2.5 NDT technology and relevent administrative cond

3、itions. 3. 一般规定3. General conditions3.1 检测人员3.1 Personnel 3.1.1 从事渗透检测的人员应 GB/T9445 和有关规程或技术文件的规定，经培训、考核，并取得相应的资格证书。操作人员应具有 I 级或 I 级以上检测资格，磁粉检测报告应由具有II 级 II 级以上检测资格者签发。 3.1.1 The personnel engaged in PT testing should be trained and tested as per the standard GB/T9445 or other equivalent specificati

4、on, document. Certificate should be obtained. Operating personnel should have testing qualification with level-I or level-I above, and magnetic particle testing report should be issued by the personnel with level-II or level-II above.3.1.12 检测工作的人员其矫正视力不得低于 1.0，且不得有色盲；并每年检查一次。3.1.12 The personnel, w

5、hose vision correction shall not be lower than 1.0 and not be color-blind, should be tested once a year.4. 表面准备4. Surface preparation4.1 工件表面不得有铁锈、氧化皮、焊接飞溅、铁屑、毛刺以及各种保护层。4.1 Product surface shall be no rust, oxide skin, welding spatter, scrap iron, burr or various protective layers.4.2 被检工件机加工表面粗糙度 R

6、a12.5um，但对不能打磨的工件可适当放宽。4.2 Tested product machining surface roughness Ra12.5um, the product unpolished can be beyond the limit appropriately.4.3 局部检测时，准备工作范围应从检测部位四周向外扩展 25mm.4.3 By local test, scope of preparatory work should extend 25mm from the parts tested all around.5. 检测时机5. Test time5.1 焊缝的磁粉

7、检测应在焊接工序完成之后进行。对有延迟裂纹倾向材料的磁粉检验应在焊完 24h 后进行。5.1 Magnetic particle testing of welding seam should be done after welded. Magnetic particle testing with delay crack tendency materials should be done 24h after welded.5.2 除另有要求，对于紧固件和锻件的磁粉检测应在最终热处理之后进行。5.2 Unless otherwise specified, magnetic particle tes

8、ting of fastener and casting should be done after the final heat treatment.5.4 检测时机应成熟，焊缝表面应检查合格，对有延迟裂纹倾向的材料应在焊接完成 24 小时后进行。5.4 Test time should be mature, weld surface should be qualified after tested, and magnetic particle testing with delay crack tendency materials should be done 24h after welded

9、.6. 渗透检测6. Penetrant testing6.1 基本程序6.1 Basic procedurea预清洗a. Pre-cleaningb施加渗透剂b. Applied penetrant c清洗多余的渗透剂c. Cleaning surplus penetrantd施加显像剂d. Applied developere观察及评定显示迹痕 e. Obsavation and evaluation of trace displayed6.2 渗透检测剂6.2 Penetrant test agenta渗透检测剂一般包括渗透剂，乳化剂，清洗剂和显像剂。a. Penetrant test

10、agent generally includes penetrant, emulsifier, cleaner, developer.b根据我公司实际情况，渗透检测剂一般使用喷罐式检测剂，并应向有生产资质的厂商购买。b. According to the actual conditions of our company, penetrant test agent generally should be spray test agent, and we should purchase for the manufacturer with qualified producing.c渗透剂，显像剂的质

11、量验收可参照相关标准执行。c. Acceptance inspection of penetrant and developer quality can be carred out according to relevent standard.6.3 对比试块6.3 Reference blocka对比试块主要用于检验检测剂性能及操作工艺，主要有铝合金试块和镀铬试块。aReference block is mainly used in testing of test agent performance and handling technology, mainly including aluminium alloy block and chroming block.b对比试块使用后要进行彻底清洗，清洗时，通常是用丙酮仔细擦洗后，再放入装有丙酮和无水酒精的混合液（混合比为 1：1）的密闭容器中保存，或使用其他等效方法保存。bReference block should be cleaned thoroughly after used. It