Raw material preparation
1. Material selection: According to the performance requirements of titanium alloy bolts, select appropriate titanium alloy grades, such as TC4, TC6, TC11, etc.
2. Bar preparation: The selected titanium alloy ingots are subjected to smelting, forging, rolling and other processes to prepare bars of appropriate size.
Cutting
1. Cutting: Use sawing, wire cutting and other methods to cut the bars into bolt blanks of the required length.
2. Marking: Mark the model, batch and other marks on the bolt blanks for easy traceability and management.
Cold heading
1. Cold heading: Put the bolt blank into the cold heading machine, and continuously cold head the blank through the mold to form the bolt head, threaded part and bare rod part.
2. Annealing: During the cold heading process, the material will produce a certain hardening, and annealing treatment is required to eliminate internal stress and improve the plasticity of the material.
3. Finishing: Finish the bolts after cold heading to ensure that the size and shape meet the requirements.
Thread processing
1. Turning: Use CNC lathe to turn the bolts and process the threaded part.
2. Thread rolling: Use thread rolling machine to roll the bolts to form complete threads.
3. Correction: Check the size, shape and accuracy of the thread and correct the unqualified parts.
Heat treatment
1. Solution treatment: Heat the bolt to a certain temperature, keep it for a period of time, so that the alloy elements are fully dissolved, and then cool it quickly to improve the strength and plasticity of the bolt.
2. Aging treatment: Heat the bolt after solution treatment to a certain temperature, keep it for a period of time, and then cool it to further improve the strength and corrosion resistance of the bolt.
Surface treatment
1. Descaling: Use pickling, alkali washing and other methods to remove the oxide scale on the surface of the bolt.
2. Polishing: Use a polishing machine to polish the bolt to improve the surface finish.
3. Plating: According to the needs, the bolt is subjected to surface treatment such as galvanizing, nickel plating, anodizing, etc. to improve corrosion resistance and aesthetics.
Inspection
1. Dimension inspection: Use tools such as calipers and thread gauges to detect the size and shape of the bolt.
2. Hardness inspection: Use a hardness tester to detect the hardness of the bolt to ensure that it meets the requirements.
3. Thread inspection: Use a thread detector to check the accuracy and integrity of the thread.
4. Chemical composition analysis: Take samples for chemical composition analysis to ensure that the bolt material meets the standards.
5. Mechanical property testing: Conduct mechanical property tests such as tension, compression, and bending on the bolts to ensure that their performance meets the requirements.
6. Corrosion resistance test: Conduct salt spray test, immersion test, etc. according to needs to detect the corrosion resistance of the bolts.
Packaging
1. Cleaning: Clean the qualified bolts to remove oil, impurities, etc.
2. Rust prevention: Apply anti-rust oil or other rust preventives to prevent the bolts from rusting during transportation and storage.
3. Packaging: Use packaging materials such as cartons and plastic bags to neatly pack the bolts, and indicate the model, specification, quantity and other information.
4. Delivery: According to the order requirements, the packaged bolts are sent to the customer's designated location.
