GB/T 43139-2023 (English Version)

Standard No.: GB/T 43139-2023
Language: Chinese, Available in English version
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 43139-2023

Scope: This document specifies the principle, test conditions, test equipment, sample preparation requirements, test steps, precision and test report of the density test of cast aluminum alloy liquid decompression solidification sample. This document is applicable to the rapid test of the density of cast aluminum alloy liquid decompression solidification sample.

Introduction

GB/T 43139-2023 Standard Interpretation

This standard specifies the principle, test conditions, test equipment, sample preparation requirements, test steps, precision and test report of the density test of the cast aluminum alloy liquid vacuum solidification sample, and is applicable to the rapid test of the density of the cast aluminum alloy liquid vacuum solidification sample.

1. Background of Standard Formulation

Casting aluminum alloy has important application value in aerospace, automobile manufacturing and other fields. Since the bubble content in aluminum alloy liquid directly affects the product quality and performance, rapid and accurate assessment of gas content has become a rigid demand of the industry. This standard is based on the law of buoyancy (Archimedes' principle) and realizes the scientific evaluation of the gas content of aluminum alloy liquid through the density test of vacuum solidification sample.

2. Analysis of Technological Evolution

From traditional sample preparation methods to modern online rapid detection technology, this standard reflects the important progress of the foundry industry in detection technology. Through the innovation of vacuum vacuum solidification process, the resolution and reliability of the test results have been significantly improved.

3. Comparison of standard frameworks

Standard dimensions	GB/T 43139-2023	JB/T 7946.3-2017	Internationally accepted standards
Detection principle	Buoyancy law + vacuum decompression technology	Metallographic method for evaluating pinhole degree	Combination of multiple physical and chemical methods
Scope of application	Rapid detection of cast aluminum alloy liquid	Metallographic structure analysis	General material performance test
Precision requirements	Repeatability ≤2%, reproducibility ≤4%	-	ISO/IEC 17025 requirements

4. Implementation suggestions

Staff training:Testers must have laboratory or smelting site work experience, and it is recommended to participate in professional skills training regularly.

Equipment calibration:Key instruments such as electronic balances and vacuum equipment should be calibrated periodically as required.

Sample processing:Pay attention to cleaning and preheating during sample preparation to avoid impurities interfering with test results.

Data recording:Fill in the test report strictly in the standard format to ensure data integrity and traceability.

GB/T 43139-2023 Referenced Document

GB/T 5611 foundry term

GB/T 43139-2023 history

2023 GB/T 43139-2023 Density testing of cast aluminum alloy liquid reduced pressure solidification samples