ISO 945-4:2019 PDF

Microstructure of cast irons — Part 4: Test method for evaluating nodularity in spheroidal graphite cast irons

Название (английский):

ISO 945-4:2019

Microstructure of cast irons — Part 4: Test method for evaluating nodularity in spheroidal graphite cast irons

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 30
Дата публикации:: 3 мая 2019 г.
Издание:: ISO IS 945 edition 1 version 1
ICS:: 77.080.10

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Описание (английский):

This document specifies a test method for evaluating nodularity in spheroidal graphite cast irons by comparative visual analysis and image analysis techniques. This document provides figures for different levels of nodularity and graphite particle count of spheroidal graphite cast irons for visual analysis.

Технические детали

Технический комитет: ISO/TC 25 - Cast irons and pig irons
SKU: ISO 945-4:2019

Abstract

Overview

ISO 945-4:2019 - "Microstructure of cast irons - Part 4: Test method for evaluating nodularity in spheroidal graphite cast irons" - defines standardized procedures to assess nodularity of spheroidal graphite cast iron using comparative visual analysis and image analysis. The document supplies reference images for different nodularity levels and graphite particle counts and gives rules for sampling, preparation, measurement and reporting of results.

Key topics and technical requirements

Scope: Test method for evaluating nodularity and graphite particle count in spheroidal graphite cast irons by visual and image analysis.
Definitions: Important terms include maximum Féret diameter, roundness (area-based ratio using maximum Féet), spheroidal graphite (roundness ≥ 0.6), nodularity (percentage of spheroidal graphite), and graphite particle count.
Sampling & preparation: Follow metallographic sampling and polishing per ISO 945-1 and ISO/TR 945-2 to ensure contrast and unaltered microstructure.
Examination magnification: ×100 preferred; adjust to match reference images in the standard.
Visual analysis: Direct microscope observation, projection on ground glass or screen using reference images (Annex A and B). Use calibrated eyepieces where appropriate.
Image analysis: Digital capture and processing per ISO/TR 945-2. Particles with maximum Féret diameter

Overview

Key topics and technical requirements

Scope: Test method for evaluating nodularity and graphite particle count in spheroidal graphite cast irons by visual and image analysis.
Definitions: Important terms include maximum Féret diameter, roundness (area-based ratio using maximum Féet), spheroidal graphite (roundness ≥ 0.6), nodularity (percentage of spheroidal graphite), and graphite particle count.
Sampling & preparation: Follow metallographic sampling and polishing per ISO 945-1 and ISO/TR 945-2 to ensure contrast and unaltered microstructure.
Examination magnification: ×100 preferred; adjust to match reference images in the standard.
Visual analysis: Direct microscope observation, projection on ground glass or screen using reference images (Annex A and B). Use calibrated eyepieces where appropriate.
Image analysis: Digital capture and processing per ISO/TR 945-2. Particles with maximum Féret diameter

ISO 945-4:2019 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

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