CN1435287A - Process for whole forging large long-shaft high-temp. alloy forge piece - Google Patents

Abstract

An integral forging process for the long axle type great high-temp alloy workpiece includes designing combined die by dividing it into deformable segment and undeformable segment consisting of several subsegments which are connected with fasteners, choosing blank with a deformable segment and an undeformable segment, local heating, and local shaping. Its advantages are simple process and apparatus, high integral quality of workpiece, and low cost.

Description

Major axis type high temp alloy heavy forging integrate forging process

The present invention relates to the FMT of high temperature alloy; The FMT of major axis type high temp alloy particularly.

The turbine major axis is the critical component of aero-engine, the good and bad engine life that directly influences of quality.Production to the turbine major axis is the method that adopts whole die forging or electron beam welding at present.Because what the turbine major axis adopted is high-temperature alloy material, resistance of deformation is big, and forging is longer again.As adopt whole die forging need drop into huge equipment funds.As adopt turbine wheel shaft and axle to carry out electron beam welding production, though equipment investment is corresponding less, electron beam welding can make the turbine major axis have weld seam, and it may be cracked in running, has a strong impact on the security of aero-engine.Therefore, along with the raising that the aero-engine product quality is required, the turbine wheel shaft of electron beam welding can not satisfy the security requirement of aero-engine.

The objective of the invention is to: a kind of major axis type high temp alloy heavy forging integrate forging process is provided.The product that adopts this explained hereafter to go out can reach the quality standard of product that whole die forging is produced, but the plant capacity of required usefulness significantly reduces.

The present invention is achieved in that major axis type high temp alloy heavy forging integrate forging process comprises the choosing of design, blank, blank local heat, the partial plastic forming of assembling die; The design of assembling die is mould to be divided into be out of shape and indeformable section, and wherein indeformable section is divided into multistage, adopts the snap close mode to connect between every section; Choosing of blank is that the blank shape that select to use should have a deformation section and one indeformable section, and corresponding with assembling die respectively; The local heat of blank is only the deformation section of blank to be heated; Partial plastic forming is that the blank that will heat is transferred in the assembling die, and deformation section is forged and pressed, and can obtain satisfactory whole heavy forging.

In the above-mentioned major axis type high temp alloy heavy forging integrate forging process, 1. the local heat of described blank comprises the steps: the deformation section of blank is lowered to stove 600～700 ℃ of furnace temperature, is heated to 800～860 ℃ then, and carries out 60～120 minutes insulation; 2. be heated to 900～980 ℃ again, and carry out 150～300 minutes insulation; 3. continue to be heated to 1000～1050 ℃, and carry out 100～200 minutes insulation.

In the above-mentioned major axis type high temp alloy heavy forging integrate forging process, described step 2. in, the time that is heated to 900～980 ℃ is no more than 60 minutes; Described step 3. in, the time that is heated to 1000～1050 ℃ is no more than 60 minutes.

Compared with the prior art, the present invention adopts the mode of partial plastic forming to forge the high temperature alloy major axis, has not only reached the product quality of whole die forging but also can save a large amount of equipment inputs.Have that equipment investment is few, technology is succinct, easy to implement, characteristics that production cost is low.Can be used in the production of various major axis type high temp alloy monolithic forging.

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.

Accompanying drawing 1 is the finished form schematic diagram of whole long-axis forging;

Accompanying drawing 2 is shape schematic diagrames of variable cross-section blank;

Accompanying drawing 3 is heating curves figure of local heat;

Accompanying drawing 4 is mold structure schematic diagrames.

Embodiment: major axis type high temp alloy heavy forging integrate forging process comprises the choosing of design, blank, blank local heat, the partial plastic forming of assembling die.What accompanying drawing 1 was represented is the finished form of a whole long-axis forging.The design of assembling die is mould to be divided into be out of shape and indeformable section, and wherein indeformable section is divided into multistage; Adopt the snap close mode to connect between every section.As shown in Figure 4, entire die is divided into three sections.Choosing of blank is that the blank shape that select to use should have a deformation section and one indeformable section, and corresponding with assembling die respectively; As shown in Figure 2, " 4 " are deformation section, and it is identical with " 1 ", " 2 " partial volume in the accompanying drawing 1; " 5 " are indeformable section, and are identical with " 3 " partial volume in the accompanying drawing 1.The local heat of blank is only the deformation section " 4 " of blank to be heated; As shown in Figure 3,1. it comprise the steps: the deformation section of blank is lowered to stove 600～700 ℃ of furnace temperature, is heated to 800～860 ℃ then, and carries out 60～120 minutes insulation; 2. be heated to 900～980 ℃ again, be no more than 60 minutes heat time heating time, and carry out 150～300 minutes insulation; 3. continue to be heated to 1000～1050 ℃, be no more than 60 minutes heat time heating time, and carry out 100～200 minutes insulation.Partial plastic forming is that the blank that will heat is transferred in the assembling die, and deformation section is forged and pressed, and can obtain satisfactory whole heavy forging.

Claims (3)

1, major axis type high temp alloy heavy forging integrate forging process comprises the choosing of design, blank, blank local heat, the partial plastic forming of assembling die; It is characterized in that: the design of assembling die is mould to be divided into be out of shape and indeformable section, and wherein indeformable section is divided into more than two sections or two sections, adopts the snap close mode to connect between every section; Choosing of blank is that the blank shape that select to use should have a deformation section and one indeformable section, and corresponding with assembling die respectively; The local heat of blank is only the deformation section of blank to be heated; Partial plastic forming is that the blank that will heat is transferred in the assembling die, and deformation section is forged and pressed, and can obtain satisfactory whole heavy forging.

2, major axis type high temp alloy heavy forging integrate forging process according to claim 1, it is characterized in that: the local heat of described blank, comprise the steps: 1. the deformation section of blank is lowered to stove 600～700 ℃ of furnace temperature, be heated to 800～860 ℃ then, and carry out 60～120 minutes insulation; 2. be heated to 900～980 ℃ again, and carry out 150～300 minutes insulation; 3. continue to be heated to 1000～1050 ℃, and carry out 100～200 minutes insulation.

3, major axis type high temp alloy heavy forging integrate forging process according to claim 2 is characterized in that: described step 2. in, the time that is heated to 900～980 ℃ is no more than 60 minutes; Described step 3. in, the time that is heated to 1000～1050 ℃ is no more than 60 minutes.

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