T/CSBM 0020-2022 Active

Main Technical Content: **Technical Requirements:** 1. **Materials:** - Cast ingots used for production and processing must be melted in a vacuum autogenous arc furnace, with no fewer than two melting cycles. The last melting cycle must not involve the addition of any elements. - Tungsten electrode arc welding is prohibited for self-consuming electrodes. - It is strictly forbidden to use any recycled titanium and titanium alloys as raw materials for casting ingots and processing materials. - The recommended heat treatment process is: - Temper at 650°C–760°C for 0.5–3.0 hours, followed by air cooling. - Vacuum annealing can also be used. The supplier may adjust the heat treatment process as needed. 2. **Chemical Composition:** - The chemical composition of the antibacterial titanium alloy Ti5Cu must comply with the specifications in Table 1. - Other elements specified in Table 1 must comply with the requirements of GB/T 3620.1. - **Table 1: Chemical Composition of Ti5Cu Antibacterial Titanium Alloy** - **Table 2: States and Specifications of Plates** - **Table 3: Permissible Deviations in Thickness, Width, and Length of Plates** - **Table 4: Room Temperature Tensile Properties of Plates** 3. **Product Classification:** - **Plates:** - States and specifications: Comply with Table 2. - Dimensions: - Thickness, width, and length: Comply with Table 3. - Unevenness: Not exceeding 3mm/m. - Edge bending: Not exceeding 3mm/m. - Edge trimming: Must be square, free from cracks, rolled edges, or burrs. The trimming angle should not exceed the permissible deviations in plate length and width. - Tensile properties: Comply with Table 4. - Microstructure: The average grain size of Ti5Cu plates should not exceed Grade 5.0 as specified in GB/T 6394-2017. The microstructure must comply with Figures a–e in Appendix A. - Bending test: Conduct