Pipe mold manufacturing process adopting continuous-casting blank to forge and roll rough blank periodically

A manufacturing process and continuous casting slab technology, which is applied in the field of pipe mold manufacturing technology using continuous casting slab periodic forging and rolling blanks, can solve the problems of difficult forming of the socket end of the pipe mold, low utilization rate of mold casting slab materials, and cost of pipe mold manufacturing Improvement and other issues to achieve the effect of shortening the production cycle, reducing manufacturing costs, and reducing raw material loss

CN102179681AInactive Publication Date: 2011-09-14邯郸市鑫泽天然气科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-09-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a pipe mold manufacturing process adopting a continuous-casting blank to forge and roll a rough blank periodically, belonging to the technical field of pipe mold manufacture. The manufacturing process comprises the process steps of: smelting of the continuous casting blank in a blast furnace, reinspecting, blanking, heating in a ring-shaped furnace, mannesmann piercing, periodically rolling a pipe, straightening, detecting flaws with magnetic powder, cutting the head and the tail, roughly processing, boring, carrying out ultrasonic flaw detection, thermally treating, sampling and reinspecting, finish processing, carrying out surface strengthening treatment, inspecting, spraying and printing, weighing and warehousing. The pipe mold manufacturing process has the advantages that the continuous casting blank replaces the mold casting blank adopted by the existing process, the characteristics that the yield is high, the cost is low, the energy consumption is less, the structure property is stable and the like are fully exerted, and the cost is reduced in the two aspects of the process and raw materials; in addition, the forging and rolling of a Pilger type rolling machine and the structure characteristics of a classic T-shaped pipe mold are effectively combined, the condition that the pipe mold blank forged and rolled by the process periodically has the performance close to the forged blank of the traditional pipe mold is guaranteed, and the Pilger head which needs to be cut in rolling is fully utilized simultaneously, so that the production efficiency is improved greatly.
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Description

Technical field

[0001] The invention belongs to the technical field of tube mold manufacturing, and in particular provides a tube mold manufacturing process that uses continuous casting blanks to periodically forge and roll blanks. Background technique

[0002] At present, the cold-mold centrifugal casting pipe technology has been very mature, coupled with its fast production pace and high efficiency, basically all medium and small-sized spherical mold casting pipes use this technology. In the production of spheroidal cast pipes by centrifugal casting, the most critical component is the centrifugal nodular cast iron pipe mold.

[0003] The centrifugal ductile iron pipe mould (material grade 21CrMo10) is a mould for casting ductile iron pipes, and is a large thermal tooling for producing ductile iron pipes on a centrifugal pipe casting machine. In production, the tube mold is always under severe working conditions, that is, in the state of high-speed rotation, the outer surface is ...

Examples

Embodiment Construction

[0037] 1. In blast furnace smelting continuous casting billet, considering the special working environment of the pipe mold, the requirements in the actual production of the pipe mold are correspondingly higher. Therefore, the content of phosphorus and sulfur should be strictly controlled in the tube billet production process. In view of this, the continuous casting billet is produced by the following processes: converter or electric furnace steelmaking, LF refining, ladle slagging, VD refining, wire feeding treatment, continuous casting Round billet, inspection, grinding;

[0038] 2. Re-inspection, before piercing and rolling the tube blank, re-inspect the surface quality, geometric dimensions, weight and steel grade of the tube blank (purchased tube blank);

[0039] 3. Blanking. Since the continuous casting billet is generally longer, it needs to be cut, that is, cutting, sawing, turning, folding or oxygen cutting the long billet to the length required by the rolling process;

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