CN103920846B - A kind of high temperature alloy Step Shaft radial forging method - Google Patents

A kind of high temperature alloy Step Shaft radial forging method Download PDF

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CN103920846B
CN103920846B CN201410149308.2A CN201410149308A CN103920846B CN 103920846 B CN103920846 B CN 103920846B CN 201410149308 A CN201410149308 A CN 201410149308A CN 103920846 B CN103920846 B CN 103920846B
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forging
axle
passage
temperature alloy
shaft
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CN103920846A (en
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谢炜
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Pangang Group Jiangyou Changcheng Special Steel Co Ltd
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Pangang Group Jiangyou Changcheng Special Steel Co Ltd
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Abstract

The invention provides a kind of high temperature alloy Step Shaft radial forging method.Described high temperature alloy Step Shaft radial forging method comprises: jumping-up also pulls out steel ingot, for forging machine provides blank; Divide multiple passage forging blank, form first step axle with blocking; And point middle part of multiple passage to first step axle is forged, to form intermediate step axle, changeover portion is formed between first step axle and intermediate step axle, wherein, form drawing of first step axle and beat speeds control at 3-5.5m/min, every time deformation amount controlling forming intermediate step axle, at 10%-25%, draws and beats speeds control at 3-5.5m/min.By control radial forging method the forging frequency, reduction in pass, draw the speed of beating and control the Property & Structure that final forging temperature controls Step Shaft product, constant product quality, structure property uniformity, finished product rate and qualification rate are improved greatly.

Description

A kind of high temperature alloy Step Shaft radial forging method
Technical field
The present invention relates to a kind of new manufacturing process of forging high-temperature alloy blank part, more particularly, relate to a kind of forging processing method of high temperature alloy Step Shaft.
Background technology
High temperature alloy refers to the high temperature metallic material of long-term work under high temperature and certain stress condition, there is excellent elevated temperature strength, good anti-oxidant and hot corrosion resistance, the combination properties such as good fatigue behaviour, fracture toughness, have become the irreplaceable critical material of military-civil gas-turbine unit hot-end component.Such as, GH901 alloy take Fe-43Ni-12Cr as base, Intermetallic compound γ ˊ [Ni3 (Ti is formed by adding Al, Ti, Al)] precipitation strength is carried out, add the ferronickel refractory Cr-base alloy that Mo carrys out solution strengthening simultaneously, below 650 DEG C, have higher yield strength and creep rupture strength, less than 760 DEG C non-oxidizabilitys are good.The high temperature yield excellent based on it and creep rupture strength, GH901 alloy Step Shaft is widely used in manufacturing the parts such as aviation and the tumbler of ground gas turbogenerator, quiet structural member, turbine wheel shaft.
The existing production technology of GH901 alloy Step Shaft is steel ingot jumping-up → pull out to step square billet → end fire time pulling to chi → rough turn → solid solution, timeliness → inspection → machined, but, utilize that this explained hereafter GH901 alloy Step Shaft of quick forging machine mainly exists unstable product quality, surperficial breach is serious, structure property uniformity is poor, ultrasonic examination clutter exceeds standard, lumber recovery and the problem such as qualification rate is low.According to production leadtime analysis, under this technique, the finished product rate of product only can reach 30 ~ 40%.
Summary of the invention
Exemplary embodiment of the present invention relates to a kind of new manufacturing process of forging high-temperature alloy turbine axis blank part, is applicable to the forging processing of high temperature alloy Step Shaft.
Forging method in exemplary embodiment of the present invention utilizes existing specification blank, and High-efficient Production goes out high-quality high temperature alloy Step Shaft, to meet the market demand of expanding day.
Key point of the present invention being the forging frequency, reduction in pass by controlling radial forging method, drawing the speed of beating and/or controlling the Property & Structure that final forging temperature controls Step Shaft product.
According to an aspect of the present invention, the material forming mode of a kind of advanced person of radial deformation is provided to produce the method for high temperature alloy Step Shaft.By adopting this Radial Forging Technology stablized, have unique advantage, constant product quality, structure property uniformity, finished product rate and qualification rate improve greatly.
According to a further aspect in the invention, provide a kind of forging frequency by control radial forging method, reduction in pass (pass deformation), draw the speed of beating and control the radial forging method that final forging temperature controls the Property & Structure of Step Shaft product.
According to an aspect of the present invention, provide a kind of high temperature alloy Step Shaft radial forging method, described high temperature alloy Step Shaft radial forging method can comprise: jumping-up also pulls out steel ingot, for forging machine provides blank; Divide multiple passage forging blank, form first step axle with blocking; And point middle part of multiple passage to first step axle is forged, to form intermediate step axle, changeover portion is formed between first step axle and intermediate step axle, wherein, form drawing of first step axle and beat speeds control at 3-5.5m/min, every time deformation amount controlling forming intermediate step axle, at 10%-25%, draws and beats speeds control at 3-5.5m/min.
Every time deflection forming intermediate step axle can control at 10%-20%.
The described multiple passage forming first step axle can comprise 3-4 passage.
The described multiple passage forming intermediate step axle can comprise 4-5 passage.
End fire time deflection can >=30%, final forging temperature can be not less than the recrystallization temperature of high temperature alloy.
It is 180 beats/min that multiple passages of described formation first step axle can comprise the first passage forging frequency, and the second passage forging frequency is 90 beats/min, and the residue passage forging frequency is 180 beats/min.
The forging frequency of multiple passages of described formation intermediate step axle can be 180 beats/min.
Described changeover portion can comprise multiple changeover portions of the value between diameter and the diameter of intermediate step axle that diameter is first step axle.
Described multiple changeover portion can comprise intermediate incline and/or transition shoulder axle.
According to a further aspect in the invention, a kind of GH901 alloy Step Shaft utilizing above-mentioned high temperature alloy Step Shaft radial forging method forging is provided.
Described high temperature alloy Step Shaft radial forging method can also be included in after each Step Shaft has forged carries out surface-treated step.
Beneficial effect of the present invention is:
1. in pre-forging process, use the forging frequency of 90 beats/min of frequencys can effective During crushing of carbides, improve the combination property of high temperature alloy Step Shaft, on the other hand, high frequency time and low-frequency word are used alternatingly, and effectively improve high temperature alloy internal soundness, effectively eliminate the generation of mixed crystal.
2. ensure the deflection that end fire is greater than 30%, can ensure that product grains degree is narrower than 3 grades, and uniformity is better, thus ensure that structure property is even.
3. final forging temperature controls be not less than the recrystallization temperature of high temperature alloy, can make crystal grain complete complete Recovery and recrystallization process, can crystal grain thinning with this, enhance product performance.
Accompanying drawing explanation
By below in conjunction with exemplarily illustrating the description that the accompanying drawing of an example carries out, above and other object of the present invention and feature will become apparent, wherein:
Fig. 1 be complete pre-forging in high temperature alloy Step Shaft radial forging method according to an exemplary embodiment of the present invention after the schematic diagram of first step axle that formed;
Fig. 2 A to Fig. 2 E is the schematic diagram forming each passage in intermediate step axle process according to an exemplary embodiment of the present invention.
Detailed description of the invention
Exemplary embodiment of the present disclosure is described in detail now with reference to accompanying drawing.
But the disclosure can illustrate in many different forms, and should not be construed as limited to the specific embodiment of setting forth here.On the contrary, provide these embodiments to make the disclosure to be thoroughly with complete, and these embodiments will convey to those skilled in the art fully the scope of the present disclosure.
In the accompanying drawings, for the sake of clarity, can exaggerate the shape and size of element, identical label will be used to indicate same or analogous element all the time.
Below, high temperature alloy Step Shaft radial forging method according to an exemplary embodiment of the present invention will be described by reference to the accompanying drawings in detail.
Fig. 1 be complete pre-forging in high temperature alloy Step Shaft radial forging method according to an exemplary embodiment of the present invention after the schematic diagram of first step axle that formed, Fig. 2 A to Fig. 2 E is the schematic diagram forming each passage in intermediate step axle process according to an exemplary embodiment of the present invention.
In the high temperature alloy Step Shaft radial forging method of exemplary embodiment according to the present invention, first according to the size of steel ingot and the actual size of forging machine, steel ingot jumping-up is pulled out steel ingot, this step is to clean out blank surface crackle, for forging machine provides blank.
Then, point multiple passage forging blank, forms first step axle with blocking.In pre-forging process, adopt the forging machine tup in cross-shaped vertical to forge steel ingot, and adopt the alternately forging of the height frequency.This forging process due to forging high frequency time very high, high frequency time can reach 180 frequencies beat/min, the low frequency is 90 frequencies beat/min, and pass through deformation parameter and the control of drawing the speed of beating, thus do not need to heat steel ingot during the forging of multi-pass, reduce energy consumption, such as, the speed of beating of drawing forming first step axle can control at 3-5.5m/min.Such as, can by the blocking first step axle of 3-4 passage.The height frequency forming multiple passages of first step axle replaces forging and refers to that the first passage forging frequency is 180 beats/min, and the second passage forging frequency is 90 beats/min, and the residue passage forging frequency is 180 beats/min.Use the forging frequency of 90 beats/min can effective During crushing of carbides second passage, improve the combination property of high temperature alloy Step Shaft.In addition, high frequency time and the low frequency are used alternatingly, and effectively improve high temperature alloy internal soundness, effectively eliminate the generation of mixed crystal.
Next, point middle part of multiple passage to first step axle is forged, and to form intermediate step axle, between first step axle and intermediate step axle, forms changeover portion.Such as, 4-5 passage can be utilized and form intermediate step axle.The forging frequency forming each passage of intermediate step axle is 180 beats/min.Particularly, every time deformation amount controlling forming intermediate step axle, at 10%-25%, draws and beats speeds control at 3-5.5m/min.Preferably, every time deformation amount controlling of intermediate step axle is formed at 10%-20%.
Changeover portion is formed between first step axle and intermediate step axle.The inclined-plane of radial forging tup surface special angle can be utilized to form the changeover portion of first step axle and intermediate step axle, and wherein, changeover portion can be the multiple changeover portions of diameter between first step axle and intermediate step axle.Radial forging tup can be utilized to form the transition shoulder axle of diameter between first step axle and the diameter of second step axle.In other words, multiple changeover portions of exemplary embodiment of the present invention can be the intermediate incline and/or transition shoulder axle that are formed by the inclined-plane of radial forging tup surface special angle.
In the high temperature alloy Step Shaft radial forging method of exemplary embodiment of the present, end fire time deflection >=30%, final forging temperature is not less than the recrystallization temperature of high temperature alloy.According to exemplary embodiment of the present invention, ensure the deflection that end fire is greater than 30%, can ensure that product grains degree is narrower than 3 grades, and uniformity is better, thus ensure that structure property is even.According to an exemplary embodiment of the present, final forging temperature controls be not less than the recrystallization temperature of high temperature alloy, can make crystal grain complete complete Recovery and recrystallization process, can crystal grain thinning with this, enhance product performance, such as, when carrying out finish-forging to GH901, final forging temperature controls at >=950 DEG C.
In addition, the high temperature alloy Step Shaft radial forging method of exemplary embodiment of the present also comprises surface treatment method, and such as, carry out surface treatment to the workpiece leaving certain surplus after having forged, final fine finishining is finished parts.
Hereinafter, the method adopting high temperature alloy Step Shaft radial forging method of the present invention to carry out forging Step Shaft is described with reference to specific embodiment.
Embodiment 1
Describing in detail with reference to Fig. 1 and Fig. 2 A to Fig. 2 E utilizes high temperature alloy Step Shaft radial forging method according to the present invention that the steel ingot blank forging that diameter is Φ 550mm is become the concrete steps of finished size for the Step Shaft of Φ 295 × 435+ Φ 175 × 125+ Φ 125 × 1245mm.
In the present embodiment, steel ingot data are as follows: this high temperature alloy is GH901, and diameter is Φ 550mm, length L=1500mm, weight 2800kg.
First, by quick forging machine by steel ingot jumping-up to H0/2, then pulling is to anistree 360mm, cleans out blank surface crackle, for radial forging (such as, 18MN radial forging) provides blank.
With reference to Fig. 1, Fig. 1 be utilize radial forging tup F steel ingot blocking is completed after the schematic diagram of first step axle (also can be referred to as the blank that blocking completes) that obtains.In the present embodiment, clamp steel ingot to be forged at A, B end, the pre-forging process then through four passages obtains the axle that diameter is D, and this diameter is the axle of D can be first step axle, and in the present embodiment, the diameter D of first step axle is 315mm.Diameter due to finished parts is 295mm, and therefore, carry out surface treatment to this workpiece leaving certain surplus after having forged, taking fine finishining as finished parts, that is, is that 315mm first step axle fine finishining (such as, car, milling, plane etc.) is to finished size by diameter D.But, the present invention is not limited thereto, can after all Step Shaft (such as, following changeover portion and intermediate step axle) completion of processing, unification carries out fine finishining to balance.
Specifically, will pull out anistree 360mm, the blank cleaning out blank surface crackle carries out the forging of multi-pass.Particularly, in the present embodiment, the 1st passage forging, to Φ 345mm, is drawn and is beaten speeds control to 5m/min, the forging frequency 180 beats/min; 2nd passage forging, to Φ 325mm, is drawn and is beaten speeds control to 4.5m/min, the forging frequency 90 beats/min; 3rd passage forging, to Φ 315mm, is drawn and is beaten speeds control to 4.5m/min, the forging frequency 180 beats/min.So far, diameter D is the multi-pass forging completion of processing of Φ 315mm first step axle.But, the present invention is not limited thereto, draw the speed of beating can control any speed in the speed of 3-5.5m/min, as long as can under high frequency time processing controlling distortion amount and deformation heat, thus avoid the heating of many fire time.
Then, the inclined-plane of recycling radial forging tup surface special angle is shaped the changeover portion of Step Shaft, and in the present embodiment, changeover portion comprises the Step Shaft of Φ 175 × 125mm, because this Step Shaft is very short, in the schematic form shown in the drawings of changeover portion.
Finally, as shown in Fig. 2 A to Fig. 2 E, utilize radial forging tup F to be divided into 5 passages to forge intermediate step axle, every time deformation amount controlling, 10 ~ 25%, draws and beats speeds control at 3 ~ 5.5m/min, and the forging frequency of each passage is 180 frequencies beat/min.
Specifically, first passage as shown in Figure 2 A, radial forging tup F according to the position of the Step Shaft of required processing, that is, forges in the middle part of first step axle, to form intermediate step axle.First, the middle part of first step axle is worked into d1 Φ 270mm from Φ 315mm.Next, the second passage shown in Fig. 2 B, is worked into d2 Φ 230mm by the diameter at position to be processed from d1 Φ 270mm.The 3rd passage shown in Fig. 2 C, continues forging, diameter is worked into d3 Φ 190mm from d2 Φ 230mm.The 5th passage shown in four-pass shown in Fig. 2 D and Fig. 2 E, forges to d4 Φ 160mm from d3 Φ 190mm respectively, forges to d5 Φ 138mm from d4 Φ 160mm.Finally, 5 passages can be utilized and form intermediate step axle.The forging frequency forming each passage of intermediate step axle is 180 beats/min.In the forging passage of d1 to the d5 of intermediate step axle, every time deformation amount controlling forming intermediate step axle, at 10%-25%, draws and beats speeds control at 3-5.5m/min.Preferably, every time deformation amount controlling of intermediate step axle is formed at 10%-20%.
In addition, diameter due to the intermediate step axle of finished parts is Φ 125mm, therefore, surface treatment is carried out to this workpiece leaving certain surplus after having forged, take fine finishining as finished parts, that is, be that 138mm intermediate step axle fine finishining (such as, car, milling, plane etc.) is to finished size Φ 125mm by diameter d 5.
Embodiment 2
In another embodiment in accordance with the invention, be that the steel ingot blank forging of Φ 550mm becomes the concrete steps that finished size is the Step Shaft of Φ 246 × 380+ Φ 146 × 100+ φ 105 × 1230mm by diameter by describing high temperature alloy Step Shaft radial forging method.
Easy in order to what describe, will the repeated description to identical content part be omitted.
In the present embodiment, steel ingot data are as follows: this high temperature alloy is GH4169.Diameter D=Φ 550mm, length L=1400mm, weight 2600kg.
First, by quick forging machine by steel ingot jumping-up to H 0/ 2, then pulling is to anistree 330mm, cleans out blank surface crackle, for radial forging (such as, 18MN radial forging) provides blank.
With reference to Fig. 1, Fig. 1 be utilize radial forging tup F steel ingot blocking is completed after the schematic diagram of first step axle that obtains.In the present embodiment, clamp steel ingot to be forged at A, B end, the pre-forging process then through four passages obtains the axle that diameter is D, and this diameter is the axle of D can be first step axle, and in the present embodiment, the diameter D of first step axle is 261mm.Diameter due to the first step axle of finished parts is 246mm, therefore, carries out surface treatment to this workpiece leaving certain surplus after having forged, take fine finishining as finished parts, that is, be that 261mm first step axle fine finishining (such as, car, milling, plane etc.) is to finished size Φ 246mm by diameter D.But, the present invention is not limited thereto, can after all Step Shaft (such as, following changeover portion and intermediate step axle) completion of processing, unification carries out fine finishining to balance.
Particularly, at a point multiple passage forging blank, formed in the process of first step axle with blocking: the 1st passage forging to Φ 315mm, draw and beat speeds control to 5m/min, the forging frequency 180 beats/min; 2nd passage forging, to Φ 294mm, is drawn and is beaten speeds control to 4.5m/min, the forging frequency 90 beats/min; 3rd passage forging, to Φ 275mm, is drawn and is beaten speeds control to 4.5m/min, the forging frequency 180 beats/min; 4th passage forging, to Φ 261mm, is drawn and is beaten speeds control to 4.5m/min, the forging frequency 180 beats/min.But, the present invention is not limited thereto, in the pre-forging process of first step axle, the speed of beating of drawing of each passage is controlled in any speed in the speed of 3-5.5m/min, for controlling distortion amount and deformation heat under high frequency time processing, thus the heating avoiding many fire secondary.
Then, as shown in Fig. 2 A to Fig. 2 D, utilize radial forging tup F to be divided into 4 passages to forge intermediate step axle, every time deformation amount controlling, 10 ~ 25%, draws and beats speeds control at 3 ~ 5.5m/min, and the forging frequency of each passage is 180 frequencies beat/min.
Particularly, utilize the inclined-plane of radial forging tup surface special angle to the changeover portion of the Step Shaft that is shaped, in the present embodiment, changeover portion comprises the Step Shaft of Φ 146 × 100, because this Step Shaft is very short, in the schematic form shown in the drawings of changeover portion.
But the exemplary embodiment of the present invention's design is not limited to GH901 or GH4169, and high temperature alloy also can be GH696.
According to exemplary enforcement of the present invention, the new manufacturing process of forging high-temperature alloy turbine axis blank part provided by the invention, is applicable to the forging processing of the Step Shaft of the high temperature alloys such as GH901 alloy.The key point of invention being the forging frequency, reduction in pass by controlling radial forging method, drawing the speed of beating and controlling the Property & Structure that final forging temperature controls Step Shaft product.By adopting this Radial Forging Technology stablized, have unique advantage, constant product quality, structure property uniformity, finished product rate and qualification rate improve greatly.
Although illustrate and describe exemplary embodiment above, will be apparent that for those skilled in the art, when do not depart from as defined by the appended claims spirit and scope of the present disclosure, can modify and modification.

Claims (7)

1. a high temperature alloy Step Shaft radial forging method, comprising:
Jumping-up also pulls out steel ingot, for forging machine provides blank;
Divide multiple passage forging blank, form first step axle with blocking; And
Divide the middle part of multiple passage to first step axle to forge, to form intermediate step axle, between first step axle and intermediate step axle, form changeover portion,
Wherein, form drawing of first step axle and beat speeds control at 3-5.5m/min, every time deformation amount controlling forming intermediate step axle, at 10%-20%, draws and beats speeds control at 3-5.5m/min,
The described multiple passage forming first step axle comprises 3-4 passage,
The described multiple passage forming intermediate step axle comprises 4-5 passage.
2. high temperature alloy Step Shaft radial forging method as claimed in claim 1, wherein, end fire time deflection >=30%, final forging temperature is not less than the recrystallization temperature of high temperature alloy.
3. high temperature alloy Step Shaft radial forging method as claimed in claim 1, wherein, it is 180 beats/min that multiple passages of described formation first step axle comprise the first passage forging frequency, and the second passage forging frequency is 90 beats/min, and the residue passage forging frequency is 180 beats/min.
4. high temperature alloy Step Shaft radial forging method as claimed in claim 1, wherein, the forging frequency of multiple passages of described formation intermediate step axle is 180 beats/min.
5. high temperature alloy Step Shaft radial forging method as claimed in claim 1, wherein, described changeover portion comprises multiple changeover portions of the value between diameter and the diameter of intermediate step axle that diameter is first step axle.
6. high temperature alloy Step Shaft radial forging method as claimed in claim 5, wherein, described multiple changeover portion comprises intermediate incline and/or transition shoulder axle.
7. one kind utilizes the GH901 alloy Step Shaft of the high temperature alloy Step Shaft radial forging method forging as described in any one claim in claim 1 to 6.
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CN106311942A (en) * 2015-06-24 2017-01-11 宝钢特钢有限公司 Forging method for producing N80A alloy by utilizing radial forging machine
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CN106363117B (en) * 2016-11-17 2019-03-15 攀钢集团攀枝花钢铁研究院有限公司 The forging method of big specification GH1016 alloy pole
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CN109622865B (en) * 2018-12-11 2020-12-29 陕西宏远航空锻造有限责任公司 Forging method of GH4169 series high-temperature alloy turbine disc for aero-engine
CN110695282A (en) * 2019-10-22 2020-01-17 成都先进金属材料产业技术研究院有限公司 Preparation method of GH3128 alloy bar
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