GB/T 38970-2020Molybdenum and molybdenum alloy powder for addictive manufacturing (English PDF)

3.1 Chemical composition

The tap density of the product is measured in accordance with the provisions of GB/T 5162.

4.5 Liquidity

The fluidity measurement of the product is carried out in accordance with the provisions of GB/T 1482.

4.6 Appearance quality

The appearance quality of the product is inspected visually.

4.7 Others

The measurement of the sphericity rate shall be carried out in accordance with the provisions of YS/T 1297, or be determined through negotiation between the supplier and the buyer. The measurement of the hollow powder rate shall be determined by negotiation between the supplier and the buyer.

5.1 Inspection and acceptance

5.1.1 The product shall be inspected by the supplier to ensure that the product quality complies with the requirements of this Standard and the order form (or the contract); the supplier shall fill in the quality certificate.

5.1.2 The buyer shall inspect the received products in accordance with this Standard and the purchase order (or contract). If the inspection result does not conform to the provisions of this Standard and the purchase order (or contract), it shall be submitted to the supplier within 45 days from the date of receipt of the product, and settled by the supplier and the buyer through negotiation.

5.2 Batch

Products shall be submitted for acceptance in batches; each batch shall be composed of products of the same production process, the same designation, and the same category.

5.3 Inspection items and sampling

The inspection items and sampling of the product shall meet the requirements of Table 6.

6.2 Packaging

Products shall be packaged in double-layer vacuum plastic packaging in plastic bags; or clean plastic barrels or metal barrels shall be used as the container unit. Use inert gas protection packaging or vacuum packaging. The environment shall be strictly controlled during the packaging process to avoid pollution. The product packaging mass is 5 kg; it can also be packaged according to the buyer's requirements. The packaging container shall ensure its integrity during transportation, and shall not be damaged, damp, or expose the product to foreign contaminants.

6.3 Transportation

Products shall be transported in a covered environment. During the transportation process, it shall be protected from rain and damp; severe collision and mechanical extrusion are strictly prohibited. The handling process shall be careful, without upside down; it is strictly forbidden to approach the fire and fire source.

6.4 Storage

The product shall be sealed and stored in a ventilated and dry place, away from fire sources. It is strictly forbidden to store it with corrosive substances such as oxidants, acids, alkalis; avoid direct sunlight.

6.5 Quality certificate

Each batch of products shall be accompanied by a quality certificate, which indicates:

a) Name of the supplier;

b) Product name:

c) Designation and category; […]