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22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof

A gas turbine and round forging technology, which is applied to metal processing equipment, etc., can solve the problems of large volume, difficulty in forging, and many impurities

Pending Publication Date: 2022-01-21
浙江大隆特材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 22Cr12NiWMoV steel is a new type of material for preparing gas turbines. However, due to the complex appearance and large volume of each part of the gas turbine, the traditional process is more complicated and the parameters are difficult to control. Too much, it is difficult to greatly improve the mechanical properties of 22Cr12NiWMoV steel
At the same time, gas turbines usually operate under high-temperature conditions, and their high-temperature resistance performance also needs to meet high requirements to ensure their safe operation. However, 22Cr12NiWMoV has poor stability in high-temperature environments because it contains more alloying elements. , it is difficult to achieve higher high temperature strength

Method used

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  • 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof
  • 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof
  • 22Cr12NiWMoV forged round steel for gas turbine and preparation method thereof

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preparation example Construction

[0022] The invention provides a kind of preparation method of 22Cr12NiWMoV forged round steel for gas turbine, comprising:

[0023] The 22Cr12NiWMoV steel ingot to be processed is sequentially subjected to segmental heating, forging and post-forging heat treatment to obtain 22Cr12NiWMoV forged round steel for gas turbines; the segmental heating includes a preheating section, a heating section and a soaking section; the forging includes sequentially The strong pressure and the pressure side; the strong pressure is carried out on the chopping board; the total deformation of the strong pressure is more than 70%; the overlapping amount of each pressing during the strong pressure is 8~12% of the width of the chopping board.

[0024] In the invention, the 22Cr12NiWMoV steel ingot to be processed is heated in sections to obtain the heat-treated 22Cr12NiWMoV steel ingot before forging.

[0025] The present invention has no special requirements on the composition of the 22Cr12NiWMoV st...

Embodiment 1

[0058] A method for preparing 22Cr12NiWMoV forged round steel for gas turbines, comprising the following steps: sequentially subjecting a 22Cr12NiWMoV steel ingot to be processed to heating in stages, forging, mold forming, and post-forging heat treatment to obtain 22Cr12NiWMoV forged round steel for gas turbines.

[0059] Firstly, the 22Cr12NiWMoV steel ingot to be treated is refined and ground to remove surface defects, and then heated in sections to obtain the 22Cr12NiWMoV steel ingot heat-treated before forging. Sectional heating is divided into preheating section, heating section and soaking section, specifically: put the 22Cr12NiWMoV steel ingot to be processed into a natural gas heating furnace at room temperature, and raise the temperature to 860℃ at a heating rate of 90℃ / h in the preheating section heat preservation temperature, and heat preservation at the temperature of the preheating section for 7 to 12 hours, and then raise the temperature to the heat preservation ...

Embodiment 2

[0063] The initial anvil width ratio in the strong pressure during forging in Example 1 is replaced by 0.62, and the specific parameters of the strong pressure during forging are shown in Table 2, and the rest of the technical features are the same as in Example 1.

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Abstract

The invention provides 22Cr12NiWMoV forged round steel for a gas turbine and a preparation method thereof, and belongs to the technical field of metal material machining. The preparation method of the 22Cr12NiWMoV forged round steel for the gas turbine comprises the step of sequentially carrying out sectional heating, forging and post-forging heat treatment on a 22Cr12NiWMoV steel ingot to be treated so as to obtain the 22Cr12NiWMoV forged round steel for the gas turbine. According to the method, by adopting a pre-forging segmented heating mode and controlling forging parameters during forging, the prepared 22Cr12NiWMoV forged round steel for the gas turbine can have excellent room-temperature and high-temperature mechanical properties, meanwhile, crystal grains are fine, few non-metallic inclusions exist, and the preparation method is simple, easy to implement and low in cost.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a 22Cr12NiWMoV forged round steel for a gas turbine and a preparation method thereof. Background technique [0002] At present, my country is vigorously developing new energy to replace non-renewable energy, among which more and more attention is paid to the development of gas energy. In addition to replacing coal-fired units and reducing carbon emission pressure, the biggest function of gas turbines is the operation balance, security and regulation of the national grid. Therefore, the heavy-duty gas turbine has always been listed as the "crown jewel" of the advanced equipment manufacturing industry. Due to the harsh working conditions and conditions of heavy-duty gas turbines, and with the increasing proportion of heavy-duty gas turbines for gas energy, more stringent requirements are put forward for their comprehensive performance. [0003] 22Cr12NiWMoV steel ...

Claims

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Application Information

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IPC IPC(8): B21J1/06B21J5/06C21D1/18C21D1/26C21D8/06
CPCB21J1/06B21J5/06C21D8/065C21D1/26C21D1/18
Inventor 俞荣新祖宇伟
Owner 浙江大隆特材有限公司
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