GB/T 13822-2017Test specimens for nonferrous diecasting alloys (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 13822-1992 Specimens for nonferrous diecasting alloys.

Compared with GB/T 13822-1992, the major changes of this Standard are as follows:

-- Modify the pouring system and exhausting system of the process diagram of test specimens for diecasting alloys, to be closer to the actual diecasting production;

-- Modify the arrangement of test specimens on the diecasting process diagram;

-- Add that diecasting enterprises can adjust diecasting process parameters according to actual production conditions.

1 Scope

This Standard specifies the type, size and requirements of test specimens for nonferrous diecasting alloys.

This Standard applies to the preparation of test specimens for mechanical property of nonferrous diecasting alloys.

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies to this document. For undated references, the latest edition (including any amendment) applies to this document.

GB/T 231.1, Metallic materials - Brinell hardness test - Part 1: Test method

3 Type and size of test specimens

4 Requirements

Diecasting enterprises can choose in Appendix A and adjust the diecasting process parameters in Appendix B according to actual production conditions.

4.2 The impact of low-speed diecasting, vacuum diecasting and other processes on the preparation of test specimens are not taken into account in this Standard. If necessary, the supplier and the purchaser can negotiate and agree on various technical requirements in the preparation process of test specimens.

4.3 The test specimen shall be cast from nonferrous metal molten in the same batch as the die casting.

4.4 The test specimen shall be cleaned of burrs, and shall not be bent and straightened.

According to the requirements of the delivery state of the casting, the same heat treatment process shall be adopted for the test specimen and the casting.

4.5 The non-clamping part of the test specimen shall not have defects such as ejector pin marks, scratches, pockmarks, cold shuts, cracks, inclusions and surface holes.

4.6 The two ends of the test specimen shall be ground and smoothed, and the feed port and slag bag port shall be removed. […]