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Conversion flange forge piece forging and thermal treatment technology

A technology for converting flanges and forging heating, which is applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc. It can solve the problems of short service life and high forging cost, so as to improve service life and reduce corrosion resistance , the effect of grain refinement

Active Publication Date: 2019-01-25
无锡继平新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the forging cost of the conversion flange forging is high and the service life is short

Method used

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  • Conversion flange forge piece forging and thermal treatment technology
  • Conversion flange forge piece forging and thermal treatment technology
  • Conversion flange forge piece forging and thermal treatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: In the embodiment,

[0058] Step 1. Melting the raw materials to obtain smelted steel ingots. Specifically, step 1 includes:

[0059] (1) Carry out EF+LF+VD treatment process on raw materials.

[0060] (2) Next, perform ESR processing.

[0061] Step 2, forging and heating. The furnace charging temperature before the ingot is heated for forging is 650°C. Specifically, step 2 includes:

[0062] (1) Heating; the heating temperature is 1200°C.

[0063] (2) heat preservation; at this time, the thickness of the steel ingot is 800mm, and the heat preservation time is 10 hours.

[0064] Step 3, forging; the forging process includes three fire times.

[0065] (1) First firing: the forging temperature is 1200°C. In the first firing, the steel ingot is drawn, upset and re-drawn in sequence, and the total drawing ratio is 4.3; the upsetting ratio is 2.6. The final forging temperature is 850°C.

[0066] After finishing the first firing, the steel ingot is put...

Embodiment 2

[0079] Step 1. Melting the raw materials to obtain smelted steel ingots. Specifically, step 1 includes:

[0080] (1) Carry out EF+LF+VD treatment process on raw materials.

[0081] (2) Next, perform ESR processing.

[0082] Step 2, forging and heating. The furnace charging temperature before the ingot is heated for forging is 650°C. Specifically, step 2 includes:

[0083] (1) Heating; the heating temperature is 1220°C.

[0084] (2) heat preservation; at this time, the thickness of the steel ingot is 800mm, and the heat preservation time is 11 hours.

[0085] Step 3, forging; the forging process includes three fire times.

[0086] (1) First firing: the forging temperature is 1200°C. In the first firing, the steel ingot is drawn, upset and re-drawn in sequence, wherein the total drawing ratio is 4.5; the upsetting ratio is 2.5. The final forging temperature is 900°C.

[0087] After finishing the first firing, the steel ingot is put into the forging heating furnace for h...

Embodiment 3

[0100] Step 1. Melting the raw materials to obtain smelted steel ingots. Specifically, step 1 includes:

[0101] (1) Carry out EF+LF+VD treatment process on raw materials.

[0102] (2) Next, perform ESR processing.

[0103] Step 2, forging and heating. The furnace charging temperature before the steel ingot is forged and heated is 500°C. Specifically, step 2 includes:

[0104] (1) Heating; the heating temperature is 1240°C.

[0105] (2) heat preservation; at this time, the thickness of the steel ingot is 800, and the heat preservation time is 10.5h.

[0106] Step 3, forging; the forging process includes three fire times.

[0107] (1) First firing: the forging temperature is 1200°C. In the first firing, the steel ingot is drawn, upset and re-drawn in sequence, and the total drawing ratio is 4.1; the upsetting ratio is 2.3. The final forging temperature is 950°C.

[0108] After finishing the first firing, the steel ingot is put into the forging heating furnace for heating...

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PUM

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Abstract

The invention discloses a conversion flange forge piece forging and thermal treatment technology. The technology comprises the following steps of 1, smelting raw materials; 2, performing forging and heating; 3, performing forging, wherein the forging process includes three heating numbers; 4, performing thermal treatment, wherein the thermal treatment process includes the first-time forging normalizing process, the second forging normalizing process and the tempering process; by improving the steel ingot ingredients and structures and the forging technology, the inherent quality of a forge piece is improved, the grain is refined, and non-uniformity is eliminated. According to the forge piece manufactured by adopting the technology, the product performance can be improved, and the service life can be prolonged.

Description

technical field [0001] The invention relates to a forging treatment process, in particular to a forging and heat treatment process for a conversion flange forging for a ram blowout preventer in an offshore oil exploitation project. Background technique [0002] The blowout preventer is a safety sealing wellhead device used to close the wellhead during oil testing, workover, well completion, etc., to prevent blowout accidents and to cut off the drill pipe in an emergency. During oil drilling, it is installed on the wellhead casing head to control the blowout device for high-pressure oil, gas and water. When using drilling pontoons and semi-submersible drilling platforms to drill wells at sea, because the drilling pontoons and platforms work in a floating state, there will be relative movement between the drilling wellhead and the subsea wellhead, and special parts that can be stretched and bent must be installed. However, because these components cannot withstand the high pr...

Claims

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Application Information

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IPC IPC(8): B21J5/06B21J5/08B21J5/10B21K29/00C21D8/00C22C38/02C22C38/04C22C38/22
CPCB21J5/06B21J5/08B21J5/10B21K29/00C21D8/005C21D2211/00C22C38/02C22C38/04C22C38/22
Inventor 张建平
Owner 无锡继平新材料科技有限公司
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