JB/T 7293.4-2010 内燃机 螺栓与螺母 第4部分：连杆螺栓 磁粉检测
作者:标准资料网 时间:2024-05-20 00:20:40 浏览:8169
来源:标准资料网
基本信息
| 标准名称： | 内燃机 螺栓与螺母 第4部分：连杆螺栓 磁粉检测 |
| 英文名称： | Internal combustion engines-Bolts and nuts-Part 4:Connecting rod bolts-Magnetic particle testing |
| 中标分类： |
机械 >>
活塞式内燃机与其他动力设备 >>
机体与运动件 |
| ICS分类： |
能源和热传导工程 >>
内燃机
|
| 替代情况： | 替代JB/T 9743-1999 |
| 发布部门： | 中华人民共和国工业和信息化部 |
| 发布日期： | 2010-02-11 |
| 实施日期： | 2010-07-01 |
| 首发日期： | |
| 作废日期： | |
| 归口单位： | 全国内燃机标委会 |
| 起草单位： | 上海内燃机研究所 |
| 出版社： | 机械工业出版社 |
| 出版日期： | 2010-07-01 |
适用范围
本部分规定了内燃机连杆螺栓磁粉检测的人员资格、技术要求、检验方法及评定方法。
本部分适用于气缸直径小于或等于200mm的往复活塞式内燃机铁磁性材料螺栓表面及其近表面缺陷的检验。
前言
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目录
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引用标准
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所属分类： 机械 活塞式内燃机与其他动力设备 机体与运动件 能源和热传导工程 内燃机
【英文标准名称】:Mechanicaldialgauges
【原文标准名称】:机械式千分表
【标准号】:JISB7503-2011
【标准状态】:现行
【国别】:日本
【发布日期】:2011-03-22
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonTestingandMeasurementTechnology
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:J42
【国际标准分类号】:17_040_30
【页数】:32P;A4
【正文语种】:日语
Product Code:SAE J1787
Title:Measurement of the Total Ash Content of Aviation Piston Engine Oils by a Calculation Method
Issuing Committee:E-38, Aviation Piston Engine Fuels And Lubricants
Scope:This SAE Recommended Practice describes an empirical method for determining the theoretical ash content of aviation piston engine lubricating oils by calculating the equivalent weight of metallic oxides formed at 775 掳C based on the metallic elemental concentration.The calculation method of ash determination may be used as an alternate to ASTM D 482 for application to the standards for aviation piston engine lubricating oils.Field of ApplicationThis procedure is recommended for use in the qualification, manufacturing, and quality assurance testing of aviation piston engine lubricating oils where the ash content is limited to a maximum of 0.011%.BackgroundThe ash content as measured by ASTM D 482 has very poor precision and repeatability for lubricants having low ash content. The precision statement for the method states that the reproducibility of a sample in the range of 0.001 to 0.079% ash content is 0.005%. Further, the bias of the test cannot be determined and there is no standard reference material containing a known level of ash for this method. This poor precision has led to numerous problems concerning the actual ash content of products on many occasions. The test method is valuable when run by experienced operators, but can provide dubious information if run under the general conditions stated in the method. For example, to obtain repeatable results, a platinum crucible must always be used in place of the silica or porcelain crucibles listed as equivalent substitutes. Meticulous care and procedural knowledge must be used by experienced operators for the method to be productive.The notes provided in ASTM D 482 also suggest that this method may not be appropriate for oils containing ashless additives or for oils containing certain phosphorous compounds which may now be in use in aviation lubricants. For oils containing additives an alternate method, ASTM D 874, is suggested. However, ASTM D 874 includes additional restrictions and reservattions which question the suitability of that method as an acceptable alternate or replacement for ASTM D 482 for low ash containing lubricating oils.
