Xingdao’s Seven Key Points to inspect raw material for die forging

Inspecting raw materials for die forging is critical to ensure the quality, consistency, and suitability of the material for the forging process. Here are Xingdao’s key points to inspect raw materials for every batches before proceeding with die forging:

1. Material Certification and Documentation

   - Verify mill test reports to confirm compliance with standards (e.g., ASTM, ISO, DIN).

   - Check chemical composition (e.g., carbon content, alloying elements) matches specifications.

   - Ensure traceability (e.g., heat number, batch number) for quality audits.

2. Visual Inspection

   - Surface defects: Look for cracks, seams, pits, rust, or inclusions that could propagate during forging.

   - Surface finish: Ensure no excessive scaling, corrosion, or contamination (e.g., oil, grease).

   - Geometry: Confirm dimensions (diameter, length) and shape (bars, billets) meet pre-forging requirements.

3. Chemical Composition Analysis

   - Perform spectrometry to verify alloy composition.

   - Ensure elements like sulfur, phosphorus, and trace impurities are within allowable limits to avoid brittleness or hot cracking.

4. Micro-structure Evaluation

   - Examine grain structure (e.g., grain size, uniformity) via metallography.

   - Check for harmful inclusions (e.g., sulfides, oxides) that weaken the material.

5. Traceability and Lot Consistency

   - Ensure raw materials are from the same batch/lot to maintain uniformity in large production runs.

   - Reject materials with inconsistent properties or mixed batches.

6. Supplier Quality Audits

   - Evaluate the raw material supplier’s quality control processes (e.g., melting practices, rolling/forming methods).

   - Require certifications like **ISO 9001** or **NADCAP** for critical industries (e.g., aerospace, automotive).

7. Final Documentation

   - Record all inspection results for traceability.

   - Flag non-conforming materials for rework or rejection.

By rigorously inspecting raw materials for each batch of raw material against these criteria, Xingdao Forging can prevent forging defects (e.g., laps, cracks, incomplete die filling), reduce downtime, and ensure the final forged components meet performance and safety standards.