CN109773096A - It is a kind of to improve flaw detection horizontal forging method and device - Google Patents

It is a kind of to improve flaw detection horizontal forging method and device Download PDF

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Publication number
CN109773096A
CN109773096A CN201811514037.0A CN201811514037A CN109773096A CN 109773096 A CN109773096 A CN 109773096A CN 201811514037 A CN201811514037 A CN 201811514037A CN 109773096 A CN109773096 A CN 109773096A
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CN
China
Prior art keywords
forging
bar
heating
temperature
deflection
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Pending
Application number
CN201811514037.0A
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Chinese (zh)
Inventor
苏灵锐
秦卫东
武洋斌
蒲光
姚彦军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi Hongyuan Aviation Forging Co Ltd
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Shaanxi Hongyuan Aviation Forging Co Ltd
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Priority to CN201811514037.0A priority Critical patent/CN109773096A/en
Publication of CN109773096A publication Critical patent/CN109773096A/en
Pending legal-status Critical Current

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Abstract

The invention belongs to field of material processings, and in particular to a kind of to improve flaw detection horizontal forging method and device.This method comprises: heating and keeping the temperature bar;Using the bar after head fire mold Forge Heating, pre- forging is obtained;Heating and the secondary pre- forging of heat preservation;The pre- forging that secondary heat preservation is forged using two fiery molds, obtains finish-forging part;Wherein, the finish-forging part is deflection the sum of of the finish-forging part to the deflection of the pre- forging with the pre- forging to the bar to the deflection of the bar.

Description

It is a kind of to improve flaw detection horizontal forging method and device
Technical field
The invention belongs to field of material processings, and in particular to a kind of to improve flaw detection horizontal forging method and device.
Background technique
GH698 is a kind of high-temperature alloy material, and GH698 is closed with the nickel-base high-temperature that the elements such as aluminium, titanium, molybdenum, niobium are strengthened Gold is made of supplementing alloying development on the basis of GH4033 alloy, with high lasting strong within the scope of 500~800 DEG C Degree and good comprehensive performance.The alloy is widely used in manufacturing the turbine disk of aero-engine, compressor disc, flow deflector, hold The important load part such as power ring, operating temperature is up to 750~800 DEG C.For more demanding forging of detecting a flaw, it is not easy after molding The forging reprocessed, is different from the forging process for fuel method of traditional mode of production, and the control to the deformation process of forging is material production Difficult point has important influence to interior tissue and performance.
When forging hammer produces, routinely heat treatment front and back needs to visit forging usual GH698 forging part after production procedure Wound, by HB/Z34-1998, A grades of examinations.Flaw detection is that user examines altogether before hot, as a result meets forging requirement, and result of detection is slightly after heat It is weaker.
For level requirement of detecting a flaw are as follows: HB/Z34-1998, A grades of examinations, result of detection is by forging internal microstructure shadow It rings;Influence to forging temperature and forging deflection is sensitive, produces hammer number and deflection for forging part, needs to solve The deflection of forging is the key that we solve production problems.
Summary of the invention
The technical problems to be solved by the present invention are: the deflection for solving forging is provided, for high-temperature alloy die forging piece, Preform Die is set to realize the control problem of deflection;Its final forging is set to meet flaw detection level requirement.
In a first aspect, providing a kind of forging method for improving flaw detection level, comprising:
It heats and keeps the temperature bar;
Using the bar after head fire mold Forge Heating, pre- forging is obtained;
Heating and the secondary pre- forging of heat preservation;
The pre- forging that secondary heat preservation is forged using two fiery molds, obtains finish-forging part;
Wherein, the finish-forging part to the deflection of the bar be the finish-forging part to the deflection of the pre- forging with Deflection the sum of of the pre- forging to the bar.
Further, the heating and the secondary pre- forging of heat preservation, comprising:
Heat pre- forging;
When heating temperature reaches preset two fiery temperature, the first preset duration is kept the temperature to the pre- forging of the heating;
Hot jacket is carried out to the pre- forging once kept the temperature;
To the pre- forging of hot jacket according to described two the second preset durations of fiery temperature, the secondary heat preservation is obtained Pre- forging.
Further, the material of the bar is GH698 high temperature alloy.
Second aspect provides a kind of forging apparatus for improving flaw detection level, comprising:
First heating module, for heating and keeping the temperature bar;
First forging module, for obtaining pre- forging using the bar after head fire mold Forge Heating;
Second heating module, for heating and the secondary pre- forging of heat preservation;
Second forging module obtains finish-forging part for forging the pre- forging of secondary heat preservation using two fiery molds;
Wherein, the finish-forging part to the deflection of the bar be the finish-forging part to the deflection of the pre- forging with Deflection the sum of of the pre- forging to the bar.
The beneficial effects of the present invention are: the present invention is a kind of to improve the horizontal forging method of GH698 high temperature alloy flaw detection, By changing the deflection of forging to blocking is increased, the forging interior tissue that flaw detection requires is realized.Thus to realize to forging Heating temperature and forging deformation amount accurate control, make once to reach expected requirement for the forging part for being not easy to change forging, have The flaw detection that effect improves high temperature alloy forging is horizontal, tissue reliability, and what is successfully processed has high creep rupture strength and good The high-temperature alloy material of comprehensive performance.
Detailed description of the invention
Fig. 1 is the schematic diagram of the forging of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the head fire mold of the embodiment of the present invention;
Fig. 3 is the analogous diagram of the head fire mold of the embodiment of the present invention;
Fig. 4 is the schematic diagram of two fiery molds of the embodiment of the present invention;
Fig. 5 is the analogous diagram of two fiery molds of the embodiment of the present invention.
Specific embodiment
The technical solution that the present invention takes, a kind of Preform Die using 5CrNiMo material;Increase blocking before die forging, Bar is heated first, then bar is produced in same equipment after progress blocking with finish-forging;Then carry out die forging, Machine adds, detects a flaw, being heat-treated, machine adds, defect detecting test.
Physico-chemical examination is detected a flaw as a result, setting to forging blocking heating temperature and forging deformation amount according to forging;
Determine deflection and the forging work step setting of forging.To realize the inspection of flaw detection requirement.
Specific scheme are as follows: blocking, each position distortions amount of reasonable layout forging are carried out to forging with blocker;Finally exist Final molding in finish-forging die obtains the institutional framework of uniform refinement, and it is horizontal to improve forging flaw detection.
Wherein, bar needs to carry out the heating of 3 temperature steps, and overall deformation is calculated by simulation 50 after blocking ~59%;After blocking can directly hot material melt down, when keeping the temperature to carrying out hot jacket after specific time;Reheating is good Blocking blank final molding in finish-forging die, overall deformation is calculated by simulation 30~35% after molding;Final die forging Forging cooling requirement after molding covers forging surface with high temperature cotton and carries out slow cooling processing.
Below with reference to example and attached drawing, the present invention will be further described:
The present invention improves the horizontal forging method of GH698 high temperature alloy forging flaw detection.
One material of the forge piece blank reheating having a size of 250 × 565mm of Φ, is heated in electric furnace, then carries out blocking and mould Forging production, is detected a flaw, etching detection after roughing.Specific forging scheme is as follows:
Bar is heated first to carry out blocking production, and then hot material, which melts down, carries out die forging production.Forging part machine carries out heat after adding Preceding flaw detection and corrosion are heat-treated after qualified, after heat again the machine of progress add, detect a flaw, etching detection.
Embodiment:
1, blocking produces:
Bar is heated, keeps the temperature 200min when heating temperature reaches preset head fire temperature range, is forged using head fire mold Bar after making heating, obtains pre- forging.
Preferably, head fire temperature range is 1095 ° -1105 °.
This forging process need to control the key parameters such as initial forging temperature and final forging temperature, vertical dimension.Pass through mould before Quasi- that head fire mold is calculated as shown in Figure 1, the range of the least amount of deformation of pre- forging is in 15%-20%, which can have Effect improves the original grain of blank, plays the role of refining crystal grain.
2, finish-forging produces:
Hot material melts down after pre- forging has produced, and heats pre- forging, the heat preservation when heating temperature reaches preset two fiery temperature 160min carries out hot jacket, then the pre- forging of hot jacket is melted down heat preservation 40min after coming out of the stove, secondary using two fiery mold forgings The pre- forging of heat preservation, obtains finish-forging part.
Preferably, two fiery temperature ranges are 1105 ° -1115 °.
Control initial forging temperature, final forging temperature, the key parameters such as vertical dimension are needed during this.Pass through simulation before Two fiery molds are calculated as shown in Fig. 2, the range of the deflection of finish-forging part is in 20%-25%, finish-forging part substantially improves end The overall deformation of forging plays the role of key for refinement crystal grain.
3, forging flaw detection situation is as shown in table 1 before heat: qualified
Table 1
4, corrosion before heat: qualified
Crystallite dimension has no metallurgical imperfection no more than 1.5 ㎜.
5, it detects a flaw after heat as shown in table 2: qualified
Table 2
6, hot post-etching: qualified
Crystallite dimension has no metallurgical imperfection no more than 2.0 ㎜.
7, forging mechanical property is as shown in table 3:
Table 3

Claims (4)

1. a kind of improve the horizontal forging method of flaw detection characterized by comprising
It heats and keeps the temperature bar;
Using the bar after head fire mold Forge Heating, pre- forging is obtained;
Heating and the secondary pre- forging of heat preservation;
The pre- forging that secondary heat preservation is forged using two fiery molds, obtains finish-forging part;
Wherein, the finish-forging part to the deflection of the bar be the finish-forging part to the deflection of the pre- forging with it is described pre- Deflection the sum of of the forging to the bar.
2. the method according to claim 1, wherein the heating and the secondary pre- forging of heat preservation, comprising:
Heat pre- forging;
When heating temperature reaches preset two fiery temperature, the first preset duration is kept the temperature to the pre- forging of the heating;
Hot jacket is carried out to the pre- forging once kept the temperature;
To the pre- forging of hot jacket according to described two the second preset durations of fiery temperature, the blocking of the secondary heat preservation is obtained Part.
3. the method according to claim 1, wherein the material of the bar is GH698 high temperature alloy.
4. a kind of improve the horizontal forging apparatus of flaw detection characterized by comprising
First heating module, for heating and keeping the temperature bar;
First forging module, for obtaining pre- forging using the bar after head fire mold Forge Heating;
Second heating module, for heating and the secondary pre- forging of heat preservation;
Second forging module obtains finish-forging part for forging the pre- forging of secondary heat preservation using two fiery molds;
Wherein, the finish-forging part to the deflection of the bar be the finish-forging part to the deflection of the pre- forging with it is described pre- Deflection the sum of of the forging to the bar.
CN201811514037.0A 2018-12-11 2018-12-11 It is a kind of to improve flaw detection horizontal forging method and device Pending CN109773096A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110773685A (en) * 2019-11-05 2020-02-11 中国第二重型机械集团德阳万航模锻有限责任公司 Preparation method of thick and large variable-section Ti-6242 alloy blisk forging

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CN102513487A (en) * 2011-12-16 2012-06-27 陕西宏远航空锻造有限责任公司 Method for forging large-size integral titanium alloy frames
CN102974728A (en) * 2012-12-05 2013-03-20 无锡透平叶片有限公司 Method for carrying out calendaring molding on GH202 high-temperature alloy sheet
CN103394629A (en) * 2013-08-16 2013-11-20 北京科技大学 Method for forging and sleeve packaging of ultra-large type nickel-base superalloy turbine disc
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Publication number Priority date Publication date Assignee Title
CN110773685A (en) * 2019-11-05 2020-02-11 中国第二重型机械集团德阳万航模锻有限责任公司 Preparation method of thick and large variable-section Ti-6242 alloy blisk forging
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