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Flange forge piece made of dual-phase steel and production technique of flange forge piece

A flange forging and production process technology, applied in the field of metal forging, can solve problems such as inability to meet requirements, and achieve the effect of improving low-temperature impact energy

Inactive Publication Date: 2017-07-18
无锡市法兰锻造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For duplex steel forgings with low temperature impact requirements, when there are such requirements, when standard components and conventional processes are used to produce, the requirements cannot be met basically.

Method used

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  • Flange forge piece made of dual-phase steel and production technique of flange forge piece
  • Flange forge piece made of dual-phase steel and production technique of flange forge piece
  • Flange forge piece made of dual-phase steel and production technique of flange forge piece

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Embodiment example 1

[0015] Selected the F60 material of two smelting furnace numbers, wherein table 1 is the chemical composition specific gravity situation of the flange forgings of low-temperature dual-phase steel material provided by the present invention, and table 2 is the chemical composition specific gravity situation of common material;

[0016] Table 1 Chemical composition of SA-182 F60 (melting furnace number: 2536220) %

[0017]

[0018] Table 2 Chemical composition of SA-182 F60 (melting furnace number: 2536266) %

[0019]

[0020] The production process of the flange forging made of the dual-phase steel material provided by the present invention includes the following steps: Step 1: smelting;

[0021] Step 2: Forging, each of the two materials is 25Kg, and forged into a forging with a size of φ200×100mm, the initial forging temperature is 1180°C ± 20°C, the final forging temperature is greater than 900°C, the total forging ratio is greater than 3, and air cooling after forging;...

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Abstract

The invention provides a flange forge piece made of dual-phase steel and a production technique of the flange forge piece. The dual-phase steel comprises 0-0.03% of C, 0-1.00% of Si, 0-2.00% of Mn, 0-0.03% of P, 0-0.02% of S, 22-23% of Cr, 4.5-6.5% of Ni, 3-3.5% of Mo and 0.14-0.20% of N. Production machining is conducted through smelting, forging and heat treatment. In the forging process, the initial forging temperature is 1180+ / -20 DEG C, the final forging temperature is higher than 900 DEG C, and air cooling is conducted after forging. According to the flange forge piece made of the dual-phase steel, the content of nickel in the chemical composition is increased, and accordingly the low-temperature impact work is substantially improved.

Description

Technical field [0001] The present invention mainly relates to the field of metal forging, and in particular to a flange forging made of dual-phase steel and its production process. Background technique [0002] Austenite + ferrite two-way stainless steel (hereinafter referred to as duplex steel) refers to stainless steel composed of two phases: austenite and ferrite. In duplex steel, there is both austenite structure and iron The solid structure, and the two-phase structure exists independently, and the content is relatively large. Generally, the content of the minimum phase should be greater than 15%. However, the duplex stainless steel used in actual engineering is mostly based on austenite and contains no less than 30%. Ferrite, the most common is duplex stainless steel with two phases accounting for about 50% each. Due to its duplex structure, duplex stainless steel has the characteristics of both austenitic stainless steel and ferritic stainless steel. Compared with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C38/44C22C38/02C22C38/04C21D8/06
CPCC22C38/58C21D8/06C21D2211/001C21D2211/005C22C38/001C22C38/02C22C38/04C22C38/44
Inventor 许建平
Owner 无锡市法兰锻造有限公司
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