Production method of high-chromium ferrite stainless-steel seamless steel pipe blank
A high-chromium ferrite, seamless steel pipe technology, applied in the field of metallurgy, can solve the problems of long production process, high yield and loss, etc.
Active Publication Date: 2015-09-16
PANGANG GROUP CHENGDU STEEL & VANADIUM
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Problems solved by technology
In the traditional production process, ferritic stainless steel pipes are mainly produced by extrusion molding. The specific process is as follows: mainly adopt "skin peeling forging → boring → induction heating → hole expansion → induction heating → extrusion"; Among them, "skin peeling and forging → boring → induction heating → reaming" is the blank preparation process. This production process is relatively long. At the same time, the boring and reaming process, in addition to the processing costs of the process, also has a large finished product. rate loss
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[0017] The invention provides a production method of a high-chromium ferritic stainless steel seamless steel pipe blank. The process flow includes: peeling the round billet → heating the forging billet → piercing, wherein:
[0018] Use the piercing device to perforate the round billet to form a capillary blank; in the piercing process, the total diameter reduction rate is 8-12%, the front-top reduction rate is ≤4%, and the ellipticity is 1.06-1.14; among them, the total diameter reduction rate = the minimum diameter of the billet in the deformation process / original billet diameter×100%; the reduction rate before the top = the billet diameter when the billet just touches the plug / the original billet diameter×100%; ellipticity=lead distance / roll distance; the height Chromium ferritic stainless steel is 2Cr25N steel.
[0019] Peeled round billet refers to a round billet whose outer surface is machined or ground.
[0020] The principle of piercing is to use the loose state where ...
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Abstract
The invention belongs to the technical field of metallurgy and particularly relates to a production method of a high-chromium ferrite stainless-steel 2Cr25N seamless steel pipe blank. The process flow of the production method comprises the following steps: scalping a round blank, heating a forging blank and perforating, wherein a perforating device is used for perforating the round blank to form a rough pipe blank; in the perforating procedure, the total-diameter reduction rate is 8-12%, the top-front reduction rate is less than or equal to 4%, and the ellipticity is 1.06-1.14. The production method has the characteristics of short production period, low preparation cost and the like; and the yield of steel pipes prepared by the blank is high.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of a high-chromium ferritic stainless steel 2Cr25N seamless steel pipe blank. Background technique [0002] High chromium ferritic stainless steel 2Cr25N, with high Cr content, has better oxidation resistance than Cr13 and Cr18 ferritic stainless steel, especially suitable for use under severe temperature fluctuations. Various heat-resistant components that work under load conditions above 950°C can be manufactured. In the traditional production process, ferritic stainless steel pipes are mainly produced by extrusion molding. The specific process is as follows: mainly adopt "skin peeling forging → boring → induction heating → hole expansion → induction heating → extrusion"; Among them, "skin peeling forging → boring → induction heating → reaming" is the blank preparation process. This production process is relatively long. At the same time, the...
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IPC IPC(8): B21C37/06
CPCB21C37/06
Inventor 鄢勇尹人洁王婀娜童宗圣张涛江健
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM