Method for producing a seamless steel tubular product

Details Method for producing a seamless steel tubular product Method for producing a seamless steel tubular product

1996-04-16

1998-10-06

Larson, Lowell A.

Metal deforming

With cleaning, descaling, or lubrication of work or product

Lubricating

72325, 72 97, B21B 4502, B21D 3002

Patent

active

058160876

ABSTRACT:
A seamless steel tubular product is produced by hot-piercing an alloy-steel billet with a piercing plug to produce a hollow shell and then rolling the hollow shell. Prior to the hot-piercing, a steel sheet is joined to an end surface of the billet into which the plug is to be driven, such that the steel plate may not project beyond the periphery of the billet, the steel plate having a surface area (C) satisfying the equation:

REFERENCES:
patent: 3153482 (1964-10-01), Buntz et al.
patent: 3818733 (1974-06-01), Cauley et al.
patent: 4353238 (1982-10-01), Breton et al.
Patent Abstracts of Japan, vol. 014, No. 026 (M-921), 18 Jan. 1990, of JP-A-01 266905 (Nippon Steel Corp), 24 Oct. 1989.
Patent Absrtacts of Japan, vol. 017 No. 068 (M-1365), 10 Feb. 1993 of JP-A-04 274806 (NIppon Steel Corp), 30 Sep. 1992.
Patent Abstracts of Japan, vol. 015, No. 325 (M-1148), 19 Aug. 1991 of JP-A-03 124305 (NIppon Steel Corp), 27 May 1991.
Patent Abstracts of Japan, vol. 005, No. 162 (M-092), 17 Oct. 1981 of JP-A-56 089307 (Kawasaki Steel Corp), 20 Jul. 1981.
Patent Abstracts of Japan, vol. 010, No. 200 (M-48), 12 Jul. 1986 of JP-A-61 042404 (Sumitomo Metal Ind Ltd), 28 Feb. 1986.

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