Rolling forming method of constructional steel complex special-shaped section ring-type element
A technology of special-shaped cross-section and structural steel, which is applied in the field of rolling forming of ring parts, can solve the problems of outer surface folding, affecting the dimensional accuracy and structure performance of final-rolled ring parts, and unfavorable precision rolling forming of ring parts with special-shaped cross-sections, etc., to achieve Effects of increasing stability and simplifying the interface relationship
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[0042] The implementation of the rolling forming method of the structural steel ring with complex profiled cross-section of the present invention requires the provision of forging heating furnaces, presses, ring rolling machines, manipulators and other equipment. The specific implementation of the method will be described in detail below taking the structural steel with the material grade of 30CrMnSiNi2A as an example:
[0043] The main chemical element content (weight percentage) of the structural steel is: C content 0.27% ~ 0.34%, Mn content 1.00% ~ 1.30%, Si content 0.9% ~ 1.2%, Cr content 0.9% ~ 1.2%, The content of Ni is 1.4%~1.8%, the content of S is ≤0.015%, the content of P is ≤0.025%, the content of Cu is ≤0.025%, and the balance is Fe.
[0044] The process steps of the structural steel from bar stock to production of qualified complex shaped cross-section ring parts are as follows:
[0045] Step 1: Making a rectangular pre-rolled billet.
[0046] The rectangular pre-rolled ...
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