CN106238659A

CN106238659A - A kind of large electric power plant rotor Forging Technology

Info

Publication number: CN106238659A
Application number: CN201610706852.1A
Authority: CN
Inventors: 葛艳明; 王远林; 沈益新
Original assignee: Jiangsu Jinyuan High-End Equipment Co Ltd
Current assignee: Jiangsu Jinyuan High-End Equipment Co Ltd
Priority date: 2016-08-24
Filing date: 2016-08-24
Publication date: 2016-12-21
Anticipated expiration: 2036-08-24
Also published as: CN106238659B

Abstract

The present invention relates to a kind of large electric power plant rotor Forging Technology, it is characterised in that: comprise the steps: 1) the first fire by blank Heating Steel Ingots to 1200～1220 DEG C, chamfered edge, be incubated 6 hours；2) use the circular arc recessed swage block of dentation epirelief, to 1) step obtain base material jumping-up, dial long, then use air blast water spray square billet is as cold as by force 800 DEG C, use the circular arc recessed swage block of dentation epirelief by 1234 order pressure one time, overturn 90 ° again order press one times；3) to 2) step obtain base material, it is heated to recrystallization temperature 880～900 DEG C, use circular arc dentation epirelief recessed swage block jumping-up, dial long, stove is cooled to the temperature range of 320～350 DEG C and is incubated 2 3h afterwards, being heated to the temperature range of 680～700 DEG C afterwards and be incubated 18～20h, stove is cooled to 150 DEG C and comes out of the stove.It is uniform that the product that this technique produces has internal modification, and residual stress is little, and crystal grain refines, and eliminates internal flaw, intensity and the toughness of forging are greatly improved.

Description

A kind of large electric power plant rotor Forging Technology

Technical field

The invention belongs to technical field of forging, particularly relate to a kind of large electric power plant rotor Forging Technology.

Background technology

Total well known large electric power plant rotor centrifugal force that high speed rotating to be born produces under high temperature operation and transmission moment of torsion The bending stress produced with deadweight, requires that rotor possesses intensity height, good toughness, structure property so complicated working condition is little Uniformly, residual stress is little etc..The most traditional Forging Technology has the drawback that stress concentration, rotor center district horizontal plastic property are low Higher with brittle transition temperature, easily cause rotor rupture.

Summary of the invention

The purpose of the present invention is in order to solve above-mentioned technical problem, it is provided that a kind of large electric power plant rotor Forging Technology, including with Lower step: 1) the first fire by blank Heating Steel Ingots to 1200 ~ 1220 DEG C, chamfered edge, be incubated 6 hours；2) circular arc dentation epirelief is used Recessed swage block, to 1) step obtain base material jumping-up, dial long, then use air blast water spray square billet is as cold as by force 800 DEG C, use circular arc The recessed swage block of dentation epirelief is pressed one time by 1234 orders, overturns 90 ° of order pressure one times again；3) to 2) step obtain base Material, is heated to recrystallization temperature 880 ~ 900 DEG C, uses circular arc dentation epirelief recessed swage block jumping-up, dials long, and stove is cooled to 320 afterwards DEG C～the temperature range of 350 DEG C being incubated～3h, be heated to 680 DEG C～the temperature range of 700 DEG C afterwards and be incubated 18～20h, Stove is cooled to 150 DEG C and comes out of the stove；The described circular arc recessed swage block of dentation epirelief, including upper swage block and lower swage block, upper swage block is the both sides conical surface The protruding arc convex surface being arranged to the two or more equal radii protruded to centre, and by circular arc camber between adjacent circular arc convex surface Smooth excessively, lower swage block is the arc convex surface of two or more equal radii that the V-type conical surface is recessed to that centre is arranged to protrude, adjacent Arc convex surface between smooth excessively by circular arc camber, also slipped over by circular arc camber light between described arc convex surface and the V-type conical surface Degree, described both sides conical surface angle and V-type conical surface angle are equal is all that α, α can change within the scope of 135 °～155 °.

Compared with prior art, the invention have the advantage that have internal modification uniformly, residual stress is little, and crystal grain refines, and disappears Except internal flaw, intensity and the toughness of forging are greatly improved.

Detailed description of the invention

Embodiment one

A kind of large electric power plant rotor Forging Technology, it is characterised in that: comprise the steps:

1) the first fire is by blank Heating Steel Ingots to 1200 DEG C, chamfered edge, is incubated 6 hours；2) the circular arc recessed swage block of dentation epirelief is used, To 1) step obtain base material jumping-up, dial long, then use air blast water spray square billet is as cold as by force 800 DEG C, use circular arc dentation epirelief Recessed swage block is pressed one time by 1234 orders, overturns 90 ° of order pressure one times again；3) to 2) step obtain base material, be heated to Recrystallization temperature 880 DEG C, uses circular arc dentation epirelief recessed swage block jumping-up, dials long, and stove is cooled to the temperature range of 320 DEG C also afterwards Insulation 2, is heated to the temperature range of 680 DEG C afterwards and is incubated 18h, and stove is cooled to 150 DEG C and comes out of the stove；Described circular arc dentation epirelief is recessed Swage block, including upper swage block and lower swage block, upper swage block is the two or more equal half that both sides conical surface projection is arranged to centre protrude Between the arc convex surface in footpath, and adjacent circular arc convex surface smooth excessively by circular arc camber, lower swage block is that the V-type conical surface is recessed to centre and sets It is set to the arc convex surface of the two or more equal radii protruded, smooth excessively by circular arc camber between adjacent arc convex surface, institute Stating between arc convex surface and the V-type conical surface also smooth excessively by circular arc camber, described both sides conical surface angle and V-type conical surface angle are equal Be all α, α be 135 °.

Embodiment two

1) the first fire is by blank Heating Steel Ingots to 1210 DEG C, chamfered edge, is incubated 6 hours；2) the circular arc recessed swage block of dentation epirelief is used, To 1) step obtain base material jumping-up, dial long, then use air blast water spray square billet is as cold as by force 800 DEG C, use circular arc dentation epirelief Recessed swage block is pressed one time by 1234 orders, overturns 90 ° of order pressure one times again；3) to 2) step obtain base material, be heated to Recrystallization temperature 890 DEG C, uses circular arc dentation epirelief recessed swage block jumping-up, dials long, and stove is cooled to the temperature range of 340 DEG C also afterwards Insulation 2.5h, is heated to the temperature range of 690 DEG C afterwards and is incubated 19h, and stove is cooled to 150 DEG C and comes out of the stove；Described circular arc dentation epirelief Recessed swage block, including upper swage block and lower swage block, upper swage block is the two or more phase that both sides conical surface projection is arranged to centre protrude Deng the arc convex surface of radius and smooth excessively by circular arc camber between adjacent circular arc convex surface, lower swage block is during the V-type conical surface is recessed to Between be arranged to the arc convex surface of two or more equal radii protruded, slipped over by circular arc camber light between adjacent arc convex surface Degree, also smooth excessively by circular arc camber between described arc convex surface and the V-type conical surface, described both sides conical surface angle and V-type conical surface folder Angle is equal be all α, α be 145 °.

Embodiment three

1) the first fire is by blank Heating Steel Ingots to 11220 DEG C, chamfered edge, is incubated 6 hours；2) circular arc dentation epirelief concave shape is used Anvil, to 1) base material jumping-up that step obtains, dial long, then use air blast water spray that square billet is as cold as by force 800 DEG C, use on circular arc dentation Convex recessed swage block is pressed one time by 1234 orders, overturns 90 ° of order pressure one times again；3) to 2) step obtain base material, heating To recrystallization temperature 900 DEG C, using circular arc dentation epirelief recessed swage block jumping-up, dial long, stove is cooled to the temperature range of 350 DEG C afterwards And it is incubated 3h, and it is heated to the temperature range of 700 DEG C afterwards and is incubated 20h, stove is cooled to 150 DEG C and comes out of the stove；Described circular arc dentation epirelief Recessed swage block, including upper swage block and lower swage block, upper swage block is the two or more phase that both sides conical surface projection is arranged to centre protrude Deng the arc convex surface of radius and smooth excessively by circular arc camber between adjacent circular arc convex surface, lower swage block is during the V-type conical surface is recessed to Between be arranged to the arc convex surface of two or more equal radii protruded, slipped over by circular arc camber light between adjacent arc convex surface Degree, also smooth excessively by circular arc camber between described arc convex surface and the V-type conical surface, described both sides conical surface angle and V-type conical surface folder Angle is equal be all α, α be 155 °.

Claims

1. a large electric power plant rotor Forging Technology, it is characterised in that: comprise the steps:

1) the first fire is by blank Heating Steel Ingots to 1200～1220 DEG C, chamfered edge, is incubated 6 hours；2) use under circular arc dentation epirelief Matrix anvil, to 1) step obtain base material jumping-up, dial long, then use air blast water spray square billet is as cold as by force 800 DEG C, use circle-arc tooth The recessed swage block of shape epirelief is pressed one time by 1234 orders, overturns 90 ° of order pressure one times again；3) to 2) step obtain base material, Be heated to recrystallization temperature 880～900 DEG C, use circular arc dentation epirelief recessed swage block jumping-up, dial long, afterwards stove be cooled to 320～ The temperature range of 350 DEG C is also incubated 2-3h, is heated to the temperature range of 680～700 DEG C afterwards and is incubated 18～20h, and stove is cooled to Come out of the stove for 150 DEG C；The described circular arc recessed swage block of dentation epirelief, including upper swage block and lower swage block, upper swage block is that both sides conical surface projection arrives Centre is arranged to the arc convex surface of the two or more equal radii protruded, and is slipped over by circular arc camber light between adjacent circular arc convex surface Degree, lower swage block is the arc convex surface that the V-type conical surface is recessed to that centre is arranged to the two or more equal radii of protrusion, adjacent circular arc Between convex surface smooth excessively by circular arc camber, also smooth excessively by circular arc camber between described arc convex surface and the V-type conical surface, described Both sides conical surface angle and V-type conical surface angle equal be all that α, α can change within the scope of 135 °～155 °.