Manufacturing method for UNSNO6690 alloy tube

A manufacturing method and technology for alloy pipes, applied in the field of alloy materials, can solve the problems of difficult forming and poor fluidity of alloy liquid, and achieve the effect of saving import cost, saving procurement cycle, excellent appearance and mechanical properties

Inactive Publication Date: 2018-06-29
李泳澎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for UNS NO6690 alloy, the alloy liquid has poor fluidity and is not easy to form, so it is difficult to manufacture high-quality products by centrifugal casting process
The centrifugal casting technology of UNS NO6690 alloy has not been reported so far

Method used

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  • Manufacturing method for UNSNO6690 alloy tube
  • Manufacturing method for UNSNO6690 alloy tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Preparation of UNS NO6690 Alloy Tube with Specification φ273 / φ193

[0026] (1) Using metal chromium, metal nickel, Q235 steel, ferrosilicon and ferromanganese as raw materials, carry out weighing and proportioning according to ASME SB564 UNS NO6690 standard ratio for standby;

[0027] (2) Bake the raw material and the metal mold cylinder for centrifugal casting at 250°C for 35 minutes; among them, the riding angle of the mold cylinder is 92°, the inner hole size is φ277mm, and the inner wall of the mold cylinder is pre-sprayed with uniform, thick 0.8 mm of a coating consisting of 30 wt% diatomaceous earth, 15 wt% microsilica, 5.0 wt% sodium bentonite and 50 wt% water.

[0028] (3) Metal nickel, metal chromium and Q235B steel are melted in an intermediate frequency electric furnace, and when the temperature reaches 1662°C, they are released from the furnace, and ferrosilicon and ferromanganese are added to obtain an alloy liquid.

[0029] (4) When the temperature of t...

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Abstract

The invention relates to a manufacturing method for a UNSNO6690 alloy tube. The manufacturing method is characterized in that metal chromium, metal nickel, Q235 steel, silicon iron, ferro-manganese and the like are taken as raw materials, and process conditions and parameters are reasonably selected, so that the UNSNO6690 alloy tube with excellent quality can be manufactured; and the obtained alloy tube has excellent appearance and mechanical properties, can replace a UNSNO6690 rolled tube on a current market, can greatly reduce product import cost and can shorten a purchasing period, and is beneficial for popularization and application of the UNSNO6690 alloy tube.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a centrifugal casting method of a UNS NO6690 alloy pipe. Background technique [0002] UNS NO6690 alloy is a typical nickel-based alloy, which has good high temperature corrosion resistance and oxidation resistance, excellent cold and hot processing and welding performance, and is widely used in titanium dioxide, petrochemical, nuclear power and other fields. However, due to its alloy material characteristics, UNS NO6690 alloy pipe can only be processed by rolling process at this stage. At present, UNS NO6690 alloy pipes with excellent materials are mainly imported, which are expensive and have a long procurement cycle. These factors have seriously affected the popularization and application of UNS NO6690 alloy pipes. [0003] Centrifugal casting is a casting method in which liquid metal is poured into a high-speed rotating mold cylinder, and the mold cylinde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/02C22C19/05C22C1/03
CPCB22D13/02C22C1/023C22C1/03C22C19/05
Inventor 李泳澎
Owner 李泳澎
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