GB/T 31981-2015 in English

Overview of sampling methods for chemical composition analysis of titanium and titanium alloys

GBT31981-2015 standard specifies the sampling and sample preparation methods for chemical composition analysis of titanium and titanium alloy casting products and processed products, and is applicable to the quality control of various titanium products.

Background and Significance of the Standard

Technical Points

Key requirements for sample preparation include:

• Sampling location: Determined according to product type, casting products are on the surface of ingots, and processed products are on the surface of finished products
• Geometric shape: Shavings, blocks and powders must be uniform and free of contamination
• Sample cleaning: Use solvents such as carbon tetrachloride to avoid touching the sample

Professional term analysis

Scaly: Small linear and flake samples mechanically removed from castings or processed parts, which must be uniform and free of impurities.

Blocky: Larger samples prepared mechanically, the surface should be smooth and burr-free, suitable for spectral analysis and other methods.

Actual application case

Implementation suggestions

To ensure the effective implementation of the standard:

• The laboratory needs to be equipped with professional sample preparation equipment (such as magnetic separators, cleaning tanks, etc.)
• Operators should receive special training to avoid sample contamination
• Establish a complete sample delivery record system to ensure traceability