When selecting stainless steel raw materials used in the deep drawing process, the following key factors should be considered:
1. Material selection:
- Grade: according to the use of deep drawing parts to choose the appropriate grade of stainless steel. For example, the 300 series of austenitic stainless steel (such as 304, 316) has good corrosion resistance and formability, and is suitable for most deep-drawing processes; 400 series of ferritic stainless steel (such as 430) has a certain degree of magnetism, lower cost, but not as good as the austenitic system of formability.
- Performance requirements: to ensure that the selected stainless steel mechanical properties, corrosion resistance, etc. to meet product requirements.
2. Surface quality:
- The surface of the raw material should be smooth, free of scratches, rust, oil, etc. to ensure that no defects are produced in the deep drawing process.
3. Dimensional accuracy:
- According to the requirements of the deep drawing process, choose the raw materials whose dimensional accuracy meets the requirements to ensure the accuracy of the final products.
4. plate thickness tolerance:
- Deep-drawing process on the thickness tolerance of the plate has high requirements, according to the process requirements to choose the appropriate thickness tolerance of the plate.
5. Plate shape:
- The shape of the raw material should be flat, without wavy, scoop curvature and other deformation to ensure uniform material flow in the deep drawing process.
6. Supplier selection:
- Select suppliers with good reputation and stable quality, and ask for material certificates to ensure that the chemical composition and physical properties of raw materials are in line with national standards.
7. Cost budget:
- On the premise of meeting the above requirements, consider the cost factor and select cost-effective raw materials.
Specific purchase steps are as follows:
1. Define the needs: determine the specific use of deep-drawing parts, performance requirements, size and specifications.
2. market research: to understand the market available types of stainless steel raw materials, prices, suppliers, etc..
3. Sampling and testing: to obtain samples from suppliers, deep drawing test, to verify that the molding performance to meet the requirements.
4. Comparison and selection: According to the test results and comprehensive assessment, select the most suitable raw materials.
5. Signing a contract: Sign a purchase contract with the supplier, specifying the quality requirements, delivery period and other terms.
Through the above steps, you can purchase stainless steel raw materials suitable for deep drawn process use.