Special forging method suitable for super duplex stainless steel bars

A duplex stainless steel, a special technology, applied in the direction of manufacturing tools, forging/pressing/hammer devices, heating/cooling equipment, etc., can solve the problems of large energy consumption, poor steel plasticity, and many times of forging fires, and achieve energy consumption Low cost, high production efficiency, and high material yield
CN105689613AActive Publication Date: 2016-06-22DAYE SPECIAL STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAYE SPECIAL STEEL CO LTD
Publication Date
2016-06-22

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Abstract

The invention belongs to the technical field of pressure machining and manufacturing and relates to a special forging method suitable for super duplex stainless steel bars. The novel special forging method suitable for the super duplex stainless steel bars is innovatively created with the advantages and disadvantages of radial forging machines and rapid forging presses fully considered and the characteristics of super duplex stainless steel considered. With steel ingots as raw materials, the method sequentially comprises the processes of radial forging and rapid forging combined blooming, radial forging finishing, air cooling and solution treatment. The yield of finished products of the super duplex stainless steel bars forged through the technology is high and is increased by more than 5% than the yield of original methods, the production efficiency is high, and the energy consumption is low. According to the method, the square or polygonal steel ingots with the section being 200-700*200-700 can be forged into the bars with Phi ranging from 60 mm to 400 mm.
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Description

technical field

[0001] The invention belongs to the technical field of pressure processing and manufacturing, and relates to a forging method, in particular to a special forging method suitable for super duplex stainless steel bars. Background technique

[0002] Super duplex stainless steel is a new type of stainless steel mainly composed of ferrite phase and austenite phase. It combines the advantages of ferritic stainless steel and austenitic stainless steel. It has good corrosion resistance and high strength. Used in medium, especially the environment containing chloride ions, such as sea water, etc.

[0003] However, for a long time, a major obstacle to the rapid promotion and application of this steel type is its poor thermoplasticity, and cracks are prone to appear in the production process of hot processing. The main reason is the different deformation behavior of austenite and ferrite phases during hot working. Due to the different softening process of the two phas...

Claims

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