AMS 2649C中英文对照

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AMS 2649C中英文对照

 

 

 

  AMS 2649C  发布    1987年7月 

修订    2008年7月 航空航天原材料说明书取代    AMS 2649B

  

Etch Inspection of High Strength Steel Parts

高强度钢零件的烧伤检查 

RATIONALE

综述

This revision was issued to add requirements for examination of carburized surfaces and to remove requirements for (1) blasting or abrading to prepare the parts and (2) approval of the anti-smut chemical. Other changes were deemed necessary as part of the SAE Five Year Review process.

这次改版增加了检查渗碳表面的要求,并去除了(1)喷砂或研磨零件的预处理要求以及(2)防污化学物的批准要求。其他的变化是SAE五年评审程序的必要更改。

1. SCOPE

范围

1.1 Purpose

目的

This specification establishes the requirements for etch inspection of bare high-strength low-alloy steel parts having tensile strength of 180 ksi (1241 MPa) and higher and of carburized parts to detect overheating caused by abusive machining or grinding in the heat treated condition, and to detect localized discontinuous carburization. This process is not applicable to surface hardened steels produced by nitriding or carbonitriding. This process may remove 0.0001 to 0.0005 inch (2.5 to 12.7 micrometers) from the surface of the part.

本规范规定了拉伸强度不低于180 ksi(1241 MPa)的高强度低合金裸钢零件和渗碳零件的烧伤检查,以检查材料在热处理状态中加工和磨削不当造成的过热,以及局部不连续渗碳。本工艺不适用于由氮化或氰化产生的表面硬化钢。本处理过程可能去除零件表面0.0001- 0.0005英寸(2.5- 12.7微米)的厚度。

1.2 Classification

类型

Etchants used in this specification are classified as follows:

Type 1 - Nitric acid in water or alcohol with an anti-smut additive

Type 2 - Nitric acid in water or alcohol

Type 3 - Ammonium persulfate in water

本规范中使用的腐蚀剂分类如下:

第1类——水或酒精中加硝酸,并混合防污添加剂

第2类——水或酒精中加硝酸

第3类——水中加过硫酸铵

1.2.1 Type 1 and Type 2 etchants may be used interchangeably. Type 1 immersion or Type 3

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