金属材料的其他试验方法标准-分析测试百科网

ASTM E1245-03(2016) 通过自动图像分析测定金属内含物或者第二相组分含量的标准实施规程

5.1 This practice is used to assess the indigenous inclusions or second-phase constituents of metals using basic stereological procedures performed by automatic image analyzers. 5.2 This practice is not suitable for assessing the exogenous inclusions in steels and other metals. Because of the sporadic, unpredictable nature of the distribution of exogenous inclusions, other methods involving complete inspection, for example, ultrasonics, must be used to locate their presence. The exact nature of the exogenous material can then be determined by sectioning into the suspect region followed by serial, step-wise grinding to expose the exogenous matter for identification and individual measurement. Direct size measurement rather than application of stereological methods is employed. 5.3 Because the characteristics of the indigenous inclusion population vary within a given lot of material due to the influence of compositional fluctuations, solidification conditions and processing, the lot must be sampled statistically to assess its inclusion content. The largest lot sampled is the heat lot but smaller lots, for example, the product of an ingot, within the heat may be sampled as a separate lot. The sampling of a given lot must be adequate for the lot size and characteristics. 5.4 The practice is suitable for assessment of the indigenous inclusions in any steel (or other metal) product regardless of its size or shape as long as enough different fields can be measured to obtain reasonable statistical confidence in the data. Because the specifics of the manufacture of the product do influence the morphological characteristics of the inclusions, the report should state the relevant manufacturing details, that is, data regarding the deformation history of the product. 5.5 To compare the inclusion measurement results from different lots of the same or similar types of steels, or other metals, a standard sampling scheme should be adopted such as described in Practice E45. 5.6 The test measurement procedures are based on the statistically exact mathematical relationships of stereology4 for planar surfaces through a three-dimensional object examined using reflected light (see Note 1). 5.7 The orientation of the sectioning plane relative to the hot-working axis of the product will influence test results. In general, a longitudinally oriented test specimen surface is employed in order to assess the degree of elongation of the malleable (that is, deformable) inclusions. 5.8 Oxide inclusion measurements for cast metals, or for wrought sections that are not fully consolidated, may be biased by partial or complete detection of fine porosity or microshrinkage cavities and are not recommended. Sulfides can be discriminated from such voids in most instances and such measurements may be performed. 5.9 Results of such measurements may be used to qualify material for shipment according to a......

Standard Practice for Determining the Inclusion or Second-Phase Constituent Content of Metals by Automatic Image Analysis

ICS: 77.040.99
CCS
发布: 2003
实施

KS D 0226-2002 钢的硫印检验方法

이 규격은 강의 설퍼 프린트 시험 방법에 대하여 규정한다. 다만, KS D 3567 등

Method of sulphur print test for steel

ICS: 77.040.99
CCS: H25
发布: 2002-12-31
实施: 2002-12-31

KS D 0226-2002(2022) 钢的硫印试验方法

Method of sulphur print test for steel

ICS: 77.040.99
CCS
发布: 2002-12-31
实施

KS D 0226-2002(2017) 钢的硫化试验方法

Method of sulphur print test for steel

ICS: 77.040.99
CCS
发布: 2002-12-31
实施

KS D ISO 196-2002(2012) 锻铜及铜合金残余应力的测定硝酸汞试验

Wrought copper and copper alloys－Detection of residual stress－Mercury(Ⅰ) nitrate test

ICS: 77.040.99
CCS
发布: 2002-12-18
实施

KS D ISO 4746-2002(2012) 无氧铜鳞附着试验

Oxygen-free copper－Scale adhesion test

ICS: 77.040.99
CCS
发布: 2002-12-18
实施

BS EN ISO 2639:2002 钢.渗碳层和硬化层的深度的测定和检验

This International Standard defines the case-hardened depth, and specifies methods for the determination of this depth, in steel. It is applicable to a) carburized cases and carbonitrided cases; b) parts that, when heat treated to final hardness, have a hardness of less than 450 HV 1 at a distance of three times the case-hardened depth, from the surface. The case-hardened depth is defined by special agreement where these conditions are not met. For steels that, in the part under test, and at a distance of three times the case-hardened depth from the surface, present a hardness greater than 450 HV 1, the criterion can still be used, provided that a limiting hardness value greater than 550 HV 1 - in steps of 25 units - be selected for the case-hardened depth.

Steels - Determination and verification of the depth of carburized and hardened cases