In the process of purchasing molybdenum crucibles, controlling product consistency requires establishing a full-process control system from five dimensions: supplier selection, technical specifications, quality inspection, process monitoring, and data management. The following are specific implementation strategies:
1. Supplier selection and qualification review
Supplier tier management
Priority will be given to suppliers with ISO 9001 quality management system certification and special metal material production qualifications.
Suppliers are required to provide production capacity data for the past three years to ensure that they have the ability to stably supply more than 1,000 pieces in a single batch.
2. Technical specifications and drawing standardization
Clarify technical parameters
The contract stipulates key indicators such as purity (≥99.95%), density (≥9.8 g/cm³), and dimensional tolerance (± 0.1mm) of the molybdenum crucible.
Drawing version control
Use CAD drawings for three-dimensional modeling, mark key dimensions and tolerance zones, and ensure that suppliers produce according to the drawings.
Tool recommendation: Use SolidWorks or AutoCAD to manage drawing versions to avoid production deviations due to drawing updates.
3. Quality Inspection and Acceptance Standards
Raw material testing
Suppliers are required to provide chemical composition reports for each batch of molybdenum plates, and to detect molybdenum content and impurity elements by ICP -OES or XRF.
Finished product testing
Appearance inspection: Use a three-coordinate measuring machine to inspect the dimensional accuracy. The surface roughness must be ≤ Ra1.6 μm.
Performance testing: High temperature oxidation test (1200℃/ 100h) and thermal shock test (2000℃→room temperature cycle 10 times) are carried out to ensure performance consistency.
Tool recommendation: Use ZEISS three-coordinate measuring machine and Netzsch thermal analyzer for testing.
4. Process monitoring and data traceability
Production process monitoring
Suppliers are required to provide key process records (such as sintering temperature, pressure, and time) to ensure stable process parameters.
Batch management and traceability
Use batch number + QR code to identify each product and record information such as raw material batch, production team, and test data.
Tool recommendation: Use SAP ERP or MES system to achieve full-process data traceability.
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