Flash Welding Forming Method of Structural Steel Large Section Ring
A technology of structural steel and large section, applied in welding equipment, resistance welding equipment, metal processing equipment, etc., can solve the problems of welding quality influence, discontinuity, unstable temperature field, etc., and achieve a reasonable temperature field and stable preheating process. Effect
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[0031] The main chemical element content (percentage by weight) of the alloy is: C content 0.34%-0.42%, Mn content 0.50%-0.80%, Si content 0.17%-0.37%, S content ≤ 0.015%, P content ≤0.025%, Cr content 0.08%~1.10%, Ni content ≤0.40%, Cu content ≤0.25, balance Fe.
[0032] The flash welding forming process steps of the alloy large cross-section ring are as follows:
[0033] Step 1: Preheat. Fix the left end 121 of the structural steel large-section ring blank 100 with openings on the left fixture 111, and fix the right end 122 on the right fixture 112; set the working power of the flash welding machine to P=350KVA~900KVA, and the current I 0 =45KA~55KA, when the power is turned on, the distance between the openings at both ends is relatively large, and the current will flow from the left end 121 of the ring blank 100 through the back 101 of the ring blank 100 to the right end 122 of the ring blank 100 to form a circulating current, as figure 1 As shown, due to the resistance ...
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