The processing of stainless steel bars (round bars, square bars, hexagonal bars, etc.) usually includes raw material preparation, forming, heat treatment, finishing and other steps. The specific process is as follows: 1. Raw material preparation Material selection: Common grades: 304, 316, 303 (free cutting), 416 (martensite), 17-4PH (precipitation hardening) Morphology: continuous casting billet, hot rolled billet Inspection: Composition analysis (spectrometer) Surface inspection (cracks, inclusions) 2. Hot processing (hot rolling/forging) (1) Hot rolling Heating: Heat the billet to 1100~1250℃ (austenitizing temperature) Rolling: forming round bars, square bars, etc. through multiple rolling mills Cooling: air cooling or water cooling (controlling grain size) Applicable products: large diameter bars (Φ≥20mm) (2) Forging Free forging: used for small batches and large size bars (such as nuclear power steel) Die forging: production of high-precision special-shaped bars (such as automobile crankshafts) 3. Cold working (cold drawing/cold rolling) (1) Cold drawing (Cold Drawing) Steps: Pickling: Remove hot rolling scale (HNO3+HF mixed acid) Phosphating/lubricating: Reduce drawing friction Drawing: Gradually reduce the diameter through the die (can improve the dimensional accuracy to ±0.02mm) Annealing: Eliminate work hardening (austenitic steel: 1010~1120℃; martensitic steel: 700~800℃) Features: High surface finish (Ra≤0.8μm) Applicable to small diameter bars (Φ1~50mm) (2) Cold rolling Formed by rolling...
With the rapid development of science and technology, more and more industries have put forward higher requirements on the performance of steel materials, especially materials used at high temperatures. Heat-resistant steel is widely used in the manufacture of boilers, steam turbines, power machinery, industrial furnaces and parts working at high temperatures in industrial sectors such as aviation and petrochemicals. The development of heat-resistant steel is closely related to the progress of energy and power machinery. In the development of new technologies in the fields of thermal power generation, atomic energy, aerospace, aviation, petroleum and chemical industries, the performance of heat-resistant steel is the key link to its success or failure, so the importance of heat-resistant steel is increasing. At present, the biggest bottleneck in improving the energy efficiency of industries such as civil nuclear power, thermal power generation, gas power generation and chemical petroleum is the problem of metal materials, that is, the development of low-cost high-performance heat-resistant stainless steel. The development of new heat-resistant stainless steel is not only one of the effective strategies for energy conservation and emission reduction, but also can alleviate the dilemma of the gradual scarcity of nickel metal resources.
Cold-rolled stainless steel plates are stainless steel plates made by cold rolling (rolling at room temperature). They have the characteristics of smooth surface, precise size, and excellent mechanical properties. They are widely used in fields with high requirements for surface quality, precision and strength. The following are its main application scenarios and characteristics:
On June 2, a German customer visited our factory and directly signed an order for 120 tons of stainless steel plates. After 10 days of processing, we have completed the entire order today and packed it for shipment.
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