Continuous forging production process for barrel parts

A production process and technology of tubes, applied in the field of continuous forging production process of tubes, can solve the problems of large capacity, low efficiency, slow heating speed of cold steel ingots, etc., and achieve the goal of reducing heating time, reducing fire times, and improving production efficiency Effect

Active Publication Date: 2020-05-19
SHANDONG BAODING HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of low efficiency of single-piece production mode, slow heating speed of cold steel ingot, and high capacity in the prior art, the present invention provides a continuous forging production process of cylindrical parts to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A continuous forging production technology of carbon structural steel (45#Φ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0038] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, select 45#, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650°C .

[0039] (2) Heating:

[0040] a. The hot steel ingot is heated to 650°C according to the maximum power and kept for 2 hours;

[0041] b. The hot steel ingot is heated to 850°C according to the maximum power and kept for 2 hours;

[0042] c. The hot steel ingot is heated to 1250°C according to the maximum power and kept for 5 hours.

[0043] (3) Forging:

[0044] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is...

Embodiment 2

[0058] A continuous forging production technology for die steel (5CrNiMoΦ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0059] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part, and utilization rate requirements of the workpiece, 5CrNiMu is selected, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650 °C.

[0060] (2) Heating:

[0061] a. The hot steel ingot is heated to 650°C with the maximum power and kept for 2 hours.

[0062] b. The hot steel ingot is heated to 850°C with the maximum power and kept for 2 hours.

[0063] c. The hot steel ingot is heated to 1230°C according to the maximum power and kept for 5 hours.

[0064] (3) Forging:

[0065] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is about 10% of the...

Embodiment 3

[0079] A continuous forging production technology for alloy structural steel (42CrMoΦ1300×Φ970×800 3.7 tons) cylindrical parts, the specific operation is as follows:

[0080] (1) Raw material preparation: According to the chemical composition, mechanical properties, flaw detection standards, dimensions of each part and utilization rate requirements of the workpiece, select 42CrMo, 4 pieces of continuous forging, the weight of the steel ingot is 18.9t, and the surface temperature of the steel ingot is 650°C.

[0081] (2) Heating:

[0082] a. The hot steel ingot is heated to 650°C with the maximum power and kept for 2 hours.

[0083] b. The hot steel ingot is heated to 850°C with the maximum power and kept for 2 hours.

[0084] c. The hot steel ingot is heated to 1250°C according to the maximum power and kept for 5 hours.

[0085] (3) Forging:

[0086] a. Wrong nozzle and riser: The wrong nozzle is about 3% of the weight of the steel ingot, and the wrong riser is about 10% of...

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PUM

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Abstract

The invention relates to a continuous forging production process for barrel parts, and belongs to the technical field of steel ingot machining. The process comprises the following steps of (1) preparing a raw material; (2) heating; (3) forging; (4) cooling after forging; (5) heat treatment after forging; and (6) saw cutting. According to the process, the used raw material steel ingot is replaced by a hot steel ingot, then the continuous forging production process is adopted by controlling the production process parameters, the barrel parts with the length of 4-7 m are produced firstly, and then the barrel parts are sawed into a plurality of parts according to requirements, so that the product is obtained. By utilizing the manufacturing method, the production cost can be effectively reduced, and the production efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of steel ingot processing, and in particular relates to a production process for continuous forging of cylindrical parts. Background technique [0002] The existing production method of tubular parts is single-piece production, and the raw material steel ingot used is cold steel ingot. The current production technology is to first raise the temperature of the cold steel ingot to 650°C at a rate of ≤60°C per hour, and keep it warm for 0.5 hours according to a cross-section of 100mm; Heat preservation; finally, heat to 1240-1260°C according to the power, and keep heat for 0.8 hours according to the cross-section of 100mm, to fully heat the steel ingot. This process has problems such as slow heating rate, long heat preservation time, and large energy consumption. The steel ingot after heating needs to go through the processes of cross nozzle riser, upsetting, punching, hole reaming, mandrel elongation, horse ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K21/00B21J5/00B21J5/06B21J5/08B21J5/10B21J1/06C21D1/28C21D8/00
CPCB21K21/00B21J5/002B21J5/06B21J5/08B21J5/10B21J1/06C21D1/28C21D8/00
Inventor 赵凤更景财年周经经张姣
Owner SHANDONG BAODING HEAVY IND
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