ISO/TR 945-3:2016 鋳鉄の微細構造—パート3：マトリックス構造 | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 25, Cast irons and pig irons.

ISO 945 consists of the following parts, under the general title Microstructure of cast irons:

• Part 1: Graphite classification by visual analysis
• Part 2: Graphite classification by image analysis [Technical Report]
• Part 3: Matrix structures [Technical Report]
• The following parts are under preparation:
• Part 4: Determination of nodularity in spheroidal graphite cast irons

Introduction

The designation of cast iron matrix structures as given in this part of ISO 945 is in conformity with the designations published by several national foundry organisations^[1][2][3] or other publishers^[4].

This Technical Report aims to

• give the designations, precise descriptions and reference micrographs of the matrix structures of cast irons, and
• facilitate the discussion and to avoid misunderstanding between manufacturer and purchaser regarding the identification of matrix structures.

1 Scope

This Technical Report gives the designations, descriptions and reference micrographs of the matrix structures of cast irons.

It applies to the following types of cast irons:

• grey cast irons (Table 4.1);
• spheroidal graphite cast irons (Table 4.2);
• austenitic cast irons (Table 4.3);
• malleable cast irons (Table 4.4);
• compacted (vermicular) graphite cast irons (Table 4.5);
• ausferritic spheroidal graphite cast irons (Table 4.6);
• abrasion-resistant cast irons (Table 4.7).

Each matrix structure is defined with explanations and micrographs.

Unless otherwise stated in Clause 4, the micrographs shown correspond to samples etched with a solution of 2 % nitric acid in ethanol (Nital).

Bibliography