JPH06238387A - Forging of long size steel - Google Patents

Forging of long size steel

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Publication number
JPH06238387A
JPH06238387A JP2663993A JP2663993A JPH06238387A JP H06238387 A JPH06238387 A JP H06238387A JP 2663993 A JP2663993 A JP 2663993A JP 2663993 A JP2663993 A JP 2663993A JP H06238387 A JPH06238387 A JP H06238387A
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Japan
Prior art keywords
forging
ratio
part
upsetting
shaft
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JP2663993A
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Japanese (ja)
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JP3256885B2 (en
Inventor
Yoshito Suzuki
Takao Wada
貴夫 和田
義人 鈴木
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Daido Steel Co Ltd
大同特殊鋼株式会社
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Application filed by Daido Steel Co Ltd, 大同特殊鋼株式会社 filed Critical Daido Steel Co Ltd
Priority to JP02663993A priority Critical patent/JP3256885B2/en
Publication of JPH06238387A publication Critical patent/JPH06238387A/en
Application granted granted Critical
Publication of JP3256885B2 publication Critical patent/JP3256885B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

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Abstract

PURPOSE: To enable forging of a long size steel having a high toughness and high strength shaft part by reheating to lower than the recrystallization temp. and forging a shaft part after upsetting one end upset part of bar stock having one end upsetting part capable of specifying a ratio of length diameter and a shaft part.
CONSTITUTION: A bar stock 10 consisting of one end upsetting part 10 having 1-3 ratio of length/outside diameter and a shaft part 10 is flat upset with rotating a lower die 12 by press machine, forming to die shape. At this time, an upsetting ratio for forming fiber flow is made to ≥1/2. Successively, changing an upper die to a punch, the upset part 10a is pressed in the die, obtaining a near net shape close to product's flange shape. Subsequently, before entering into forging stage, the bar stock 10 with flange part formed is reheated to the recrystallization temp. And the shaft part 10b of the bar stock 10 is forged at a forging ratio of ≥2s by four face forging machine, improving a steel structure through refining of crystalline grain. By this forging stage, the shaft part is forged over 2000mm.
COPYRIGHT: (C)1994,JPO&Japio

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、一端にフランジ部を一体に形成させた航空機用大型エンジンの長尺シャフト等の製造に好適に適用される長尺鋼材の鍛造方法に関する。 The present invention relates to a forging method for long steel which is suitably applied to the manufacture of elongate shaft or the like of a large engine aircraft having formed integrally with the flange portion at one end.

【0002】 [0002]

【従来の技術】航空機用大型ファンジェットエンジンには、一端に、ファンディスクが取付けられるフランジ(傘部9を一体に形成させた長尺のシャフト用鍛造材が使用されている。この様なシャフト素材としては、例えばマルエージング鋼が用いられ、素材の歩留りの向上や靱性や引張強度等の、必要な材料力学的性質を得るために、シャフト部を所定の鍛練比で鍛伸させる一方、一端部を据え込んでフランジ部が一体に形成され、製品形状に近い形状(ニアネットシェイプ)のシャフト材を得るようにしている。この種のシャフト材の従来の製造方法としては、先ず鍛造機により軸部を鍛伸させた後、プレス機で端部を据え込んでフランジ部を形成させている。 BACKGROUND OF THE INVENTION Large fan jet engine for an aircraft, on one end, the shaft for forging long that the flange (umbrella portion 9 the fan disk is mounted is formed integrally is used. Such shaft the material, for example, maraging steel is used, in order to obtain such improvement and toughness and tensile strength of the material yield, the material mechanical properties required, whereas for forging the shaft portion at a predetermined wrought ratio, one end flange crowded laid the parts are integrally formed, so as to obtain the shaft material near the product shape shape (near net shape). as a conventional method for producing this type of shaft material, the first forging machine after the shaft portion is forged, thereby it is forming a flange portion crowded laid the end in a press.

【0003】 [0003]

【発明が解決しようとする課題】しかしながら、エンジンの大型化に伴って全長が3000mmにも及ぶ長尺のシャフト用鍛造材が要請されるようになってきた。 [SUMMARY OF THE INVENTION However, the overall length has come to a shaft for forging long of up to 3000mm is requested with the size of the engine. このようなシャフト材は、軸部の長さが長いので、鍛伸させたシャフトを上下方向に立てた状態でプレス機にセットしてその端部の据込加工を行なうことは不可能に近い。 Such shaft member, since the longer length of the shaft portion, it is almost impossible to set the pressing machine performs swaging processing of the end portion in an upright state shaft is forged in the vertical direction .

【0004】そこで、端部に形成させるフランジ(傘部)の外径に等しい鋼材を準備し、フランジ部を残して所望の径に鍛伸させた後、機械加工によりフランジを形成させると、フランジ部のファイバフローが、このフランジ部に作用する遠心力の方向と一致せず、強度的要求を満足しないことになる。 [0004] Thus, to prepare the equal steel to the outer diameter of the flange (umbrella portion) to be formed on the end, after being forged into a desired diameter, leaving the flange portion and to form a flange by machining, flange fiber flow section is not coincident with the direction of the centrifugal force acting on the flange, it will not satisfy the strength requirements. 本発明は、このような事情に鑑みてなされたもので、軸部においては鍛伸により結晶粒の微細化による鋼組織の改善を図り、フランジ部においては所要のファイバフローを有し、且つ、ネットシェイプ化を図り、もって高靱性、高強度の、軸部の長さが2000mm以上の長尺鋼材の鍛造方法を提供することを目的とする。 The present invention has such has been made in view of the circumstances, aims to improve the steel structure due to grain refinement by forging in the axial section has the required fiber flow in the flange portion, and, achieving net shaping, an object with a high toughness, high strength, the length of the shank provides a forging method or long steel 2000 mm.

【0005】 [0005]

【課題を解決するための手段および作用】上記した目的を達成するために、本発明においては、長さL1と外径Dの比L1/Dが1〜3である一端据込部と軸部とを有する棒材の前記一端据込部を据込比1/2 u以上に据え込んだ後、再結晶温度以下に再加熱し、前記軸部を鍛練比2s以上に鍛伸し、鍛伸した軸部の長さL2が2000 To achieve SUMMARY OF and act] above object, in the present invention, one swaging portion and the shaft portion is the ratio L1 / D of the length L1 and the outer diameter D is 1 to 3 after elaborate laid the one end swaging portion of the bar with bets over upsetting ratio 1/2 u, reheated below the recrystallization temperature, and forging the shank than wrought ratio 2s, forging the length L2 of the shaft portion and the 2000
mm以上であることを特徴とする長尺鋼材の鍛造方法が提供される。 Forging method of elongated steel, characterized in that at mm or more is provided.

【0006】この発明の長尺鋼材の鍛造方法は、一端に傘状のフランジやディスク状の歯車、カウンタウエイト等を一体に形成させた、製品軸部長さL2が2000m [0006] forging method of long steel of the present invention, the umbrella-shaped flange or disc-shaped gear at one end, to form integrally a counterweight or the like, the product axis manager L2 of 2000m
m以上である、例えば、航空機用エンジンのスタブシャフトの製造に好適に適用される。 At least m, for example, is suitably applied to the manufacture of the stub shaft of an aircraft engine. 図1ないし図5は、本発明方法による航空機用エンジンのスタブシャフトの製造工程を示し、これらの図を参照して本発明方法の詳細を説明する。 1 to 5 show a manufacturing process of the stub shaft of the aircraft engine according to the present invention a method, with reference to these figures, the details of the method of the present invention.

【0007】先ず、所定形状の素材(ビレット)10を準備してこれをプレス機の下ダイ12にセットする。 [0007] First, to set it to prepare the predetermined shape of the material (billet) 10 under die 12 of a press. 素材10の鋼種としては、鍛伸により鋼組織が改善されるものであれば特に限定されるものではないが、マルエージング鋼等が好適に適用できる。 The steel type of the material 10, but is not particularly limited as long as the steel structure is improved by forging, maraging steel or the like can be suitably applied. 素材10は、所要の外径(D)および長さを有する丸棒形状をなし、これを所定温度に加熱したものである。 Material 10 forms a round bar shape having a predetermined outer diameter (D) and the length is obtained by heating it to a predetermined temperature. 下ダイ12の上面中央には、製品のフランジ部を成形するための型12aが形成されている。 The center of the upper surface of the lower die 12, die 12a for molding the flange portion of the product is formed. 素材10は、その上端10aを型12aの型底から上方に長さL1だけ突出させており、この突出させた部分10a(長さL1×外径D)が据込部となる。 Material 10 is allowed to protrude by a length L1 upward to its upper end 10a from the mold bottom of the mold 12a, this protruded allowed portion 10a (the length L1 × outer diameter D) is upsetting part. この据込部10aの長さL1と外径Dの比(L1/ The ratio of the length L1 and the outer diameter D of the upsetting portion 10a (L1 /
D)は1〜3に設定される。 D) is set to 1-3. 据込部10aの形状比(L Shape ratio of upsetting portions 10a (L
1/D)が3より大きいと、据込時に座屈が生じる虞があり、逆に1より小さいと、据え込んで形成されるフランジ部のファイバフローが所要のパターンに形成されない。 1 / D) is larger than 3, there is a possibility that buckling occurs at the time of upsetting, 1 and less than the reverse, the fiber flow of the flange portion formed crowded laid it is not formed in the required pattern.

【0008】素材10は、プレス機により下ダイ12を回転させながら平据え込みして、型入れする(図2)。 [0008] Material 10 is to upsetting flat while rotating the lower die 12 by the pressing machine, the mold was placed to (FIG. 2).
このときの据込比は1/2 u以上に据え込むのがよく(この明細書全体において、「据込比は1/2 u以上に据え込む」なる表現は、据込比が1/2u,1/2.5u,1/3u…と、据込比1/2 uより据込量が大になるように据え込むことを意味する)、これ以下の場合には所要のファイバフローが形成されない。 Throughout well (this specification of upsetting ratio upsetting than 1/2 u in this case, "upsetting ratio upsetting than 1/2 u" The expression upsetting ratio 1 / 2u , 1 / 2.5 u, and 1 / 3u ..., upsetting amount from upsetting ratio 1/2 u means that upsetting to be large), without the required fiber flow is formed in the case of this less . 次いで、上ダイをポンチ14に代え、据込部10aを型内12aに押し込み(図3)、製品のフランジ形状に近いニアネットシェイプが得られる。 Then, instead of the upper die punch 14, pushing the swaging portion 10a into mold 12a (FIG. 3), near net shape is obtained close to the flanges shape of the product. このポンチによる型内押込み工程は製品によっては省略することができる。 Mold pushing step by the punch can be omitted depending on the product.

【0009】次に、軸部10bの鍛伸工程に入るが、鍛伸前に、フランジ部を成形した素材10を、再結晶温度以下(例えば、上述したマルエージング鋼では1100 [0009] Next, into the forging process of the shaft portion 10b, before forging, the material 10 obtained by forming the flange portion, the recrystallization temperature or lower (e.g., maraging steel described above 1100
℃以下)に再加熱しておく。 ℃ keep reheated below). そして、4面鍛造機によりシャフト素材10の軸部10bを、鍛練比1.5s以上で鍛伸する(図4)。 By four sides forging machine shaft portion 10b of the shaft material 10, it is forged in wrought ratio 1.5s or more (Figure 4). 4面鍛造機の詳細な構成は図示されていないけれども、この鍛造機は、マニピュレータ装置により被鍛造材を把持し、被鍛造材をその軸方向に対し直交する4方向から4個の金敷16により同時に圧下し、被鍛造材をスエージングにより鍛伸(細径化、テーパ化等)する装置であり、この装置は公知である。 Although detailed configuration of the four-sided forging machine is not shown, the forging machine grips to be forged by the manipulator device, the four anvil 16 from four directions perpendicular to the forging relative to the axial direction and pressure at the same time, a device for forging (smaller diameter, taper, etc.) by swaging to be forged, the devices are known. 金敷16としては、端部のフランジ肩部形状に適合する形状を備えたものが使用される。 The anvil 16, those with shape conforming to the flange shoulder shape of the end portion is used. 鍛伸時における鍛練比が1.5sより小さいと組織の改善(結晶粒の微細化)が得られない。 Wrought ratio improved 1.5s smaller and organization (grain refining) is not obtained at the time of forging. 好ましい鍛練比としては2s以上である。 Preferred wrought ratio is 2s or more.
この鍛伸工程により鍛伸部、すなわち軸部10bが20 Forged part by the forging process, namely the shaft part 10b is 20
00mm以上の長さL2に鍛伸される(図5)。 It is more forged the length L2 300 mm (Fig. 5). なお、 It should be noted that,
鍛伸されたシャフト素材10は、その後必要な熱処理や機械加工が施される。 Forged by a shaft material 10, it is then required heat treatment and machining is performed.

【0010】 [0010]

【実施例】本発明の製造方法を航空機用大型エンジンのスタブシャフトの製造に適用した。 The manufacturing method of the embodiment of the present invention is applied to the production of the stub shaft of the aircraft for large engines. 先ず、外径(D)3 First, the outer diameter (D) 3
50mm×長さ1600mmの丸棒形状をなすビレット10 Billet 10 which forms the rod shape of 50 mm × length 1600mm
を準備してこれをプレス機の下ダイ12にセットする。 This is to prepare the the set under the die 12 of the press.
ビレット10は、前述したマルエージング鋼であり、所定温度(例えば、970℃)に加熱してある。 Billet 10 is a maraging steel described above, it is heated to a predetermined temperature (e.g., 970 ° C.). 下ダイ1 The lower die 1
2の上面中央には、製品のフランジ部を成形するための型12aが形成されており、ビレット10は、その上端10aを型12aの型底から上方に長さ(L1)530 The second upper center, mold 12a for molding the flange portion of the product is formed, billet 10 has a length over the upper end 10a of the mold bottom mold 12a (L1) 530
mmだけ突出させてセットされ、この突出させた部分、 mm just set is protruded, was the projecting portion,
すなわち据込部10aの長さL1と外径Dの比(L1/ That is, the ratio of the length L1 and the outer diameter D of the upsetting portion 10a (L1 /
D)は1.5である。 D) is 1.5.

【0011】ビレット10は、プレス機により下ダイ1 [0011] The billet 10, the lower die by the press machine 1
2を回転させながら平据え込みして、型入された(図2)。 2 and upsetting flat while rotating the was type input (Figure 2). 次いで、上ダイをポンチ14に代え、据込部10 Then, instead of the upper die punch 14, swaging portion 10
aを型内12aに完全に押し込み(図3)、製品のフランジ形状に近いニアネットシェイプを得た。 Fully into mold 12a to a (FIG. 3), to obtain a near-net shape close to the flange shape of the product. 次に、フランジ部を成形した素材10を、再結晶温度以下である1 Then, the material 10 obtained by forming a flange portion is recrystallization temperature below 1
100℃に再加熱し、4面鍛造機によりシャフト素材1 Reheated to 100 ° C., the shaft blank 1 by four surfaces forging machine
0の軸部10bを鍛練比3sで、長さ(L2)3000 0 the shaft portion 10b in wrought ratio 3s of the length (L2) 3000
mm、軸径(D2)200mmに鍛伸した(図4,図5)。 mm, were forged to the shaft diameter (D2) 200 mm (4, 5). 得られたシャフト素材10の金属組織を顕微鏡で観察した結果、平均結晶粒径は#8.3であった。 Result of observation of the metal structure under a microscope of the resultant shaft material 10, the average crystal grain size was # 8.3.

【0012】図6は、本発明方法により製造されるシャフト素材10のフランジ部(傘部)10aにおけるファイバフローの変化を模式的に示し、図6(A)は、図1 [0012] Figure 6, the flange portion of the shaft material 10 produced by the method of the invention a change in fiber flow in (umbrella) 10a schematically shows, FIG. 6 (A) 1
に示す素材10の未加工時のフローを、図6(B)は、 The flow at the raw material 10 shown in, FIG. 6 (B)
図2に示す平据込後のフローを、図6(C)は、図3に示すポンチ後のフローをそれぞれ示す。 The flow after the flat swaging shown in FIG. 2, FIG. 6 (C) show respectively a flow after the punch shown in FIG. 一方、図7は、 On the other hand, FIG. 7,
比較方法によりシャフト素材を製造した場合のフランジ部のファイバフローを模式的に示す。 The fiber flow of the flange portion of the case of producing the shaft material by comparison method is shown schematically. この比較方法では、図7(A)に示すように、製品時のフランジ部の外径に相当する大きさのビレットを準備し、この端部に形成させるフランジ部分を残して鍛伸した後、機械加工(切削加工)により所要のフランジを形成させたものである。 In this comparison process, as shown in FIG. 7 (A), after preparing the size of the billet corresponding to the outer diameter of the flange portion at the time of product were forged to leave flange portion to be formed on this end, it is obtained by forming the required flange by machining (cutting). 図7(B)の破線は機械加工により形成させるフランジの外形形状を示す。 Dashed line in FIG. 7 (B) shows the outer shape of the flange to be formed by machining. 本発明方法によるシャフト素材10のファイバフローは、径方向に沿って延びており、本発明方法に依れば、遠心力が作用するフランジ部のファイバフローを、比較方法のフローと比較して、好ましいパターンに形成させることができる。 Fiber flow of the shaft material 10 according to the method of the present invention extends along the radial direction, according to the method of the present invention, the fiber flow of the flange portion which centrifugal force acts, as compared to the flow of the comparison process, it can be formed in the preferred pattern.

【0013】 [0013]

【発明の効果】以上の説明で明らかなように、本発明の長尺鋼材の鍛造方法に依れば、軸部を鍛伸する前に、一端据込部の据込加工が実行されるために、製品時の軸部の長さが2000mm以上のものでも、据込機(プレス機)による据込加工ができる。 As it is apparent from the foregoing description, according to the forging method of the long steel of the present invention, prior to forging the shank, since the upsetting working of one upsetting part is performed , the length of the shaft portion during product be of more than 2000 mm, it is upsetting process by swaging machine (press machine). そして、長さL1と外径Dの比L1/Dが1〜3である一端据込部を、据込比1/ Then, the ratio L1 / D of the length L1 and the outer diameter D is 1 to 3 at one end upsetting part, upsetting ratio 1 /
2 u以上に据え込むので、このように据え込んだ一端据込部には、好ましいファイバフローを形成させることができる。 Since upsetting than 2 u, the end swaging portion elaborate upset Thus, it is possible to form a preferred fiber flow. 一方、軸部は鍛練比1.5s以上に鍛伸されるので、この部分の結晶粒が微細化し、所要の材料力学的性能、すなわち、靱性に優れ、高強度の長尺鋼材を得ることができる。 On the other hand, the shaft portion is forged over wrought ratio 1.5s, crystal grains are miniaturized in this part, the required material mechanical properties, i.e., that the superior toughness, obtain the long steel high strength it can.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明に係る長尺鋼材の鍛造方法の製造工程を示し、素材をダイにセットした状態の断面図である。 [1] shows a manufacturing process of the forging method of the long steel material according to the present invention, is a cross sectional view showing a state in which setting the material to the die.

【図2】本発明の製造方法により素材の一端を平据込した状態の断面図である。 2 is a cross-sectional view of a state where flat swaging one end of the material by the manufacturing method of the present invention.

【図3】図2に示す平据込加工後に、ポンチにより型内に押込加工を行なった状態の断面図である。 In [3] flat swaging after processing shown in FIG. 2 is a cross-sectional view of a state of performing a push processed in the mold by the punch.

【図4】本発明の製造方法により素材軸部の鍛伸加工状態を示す側面図である。 By the production method of the present invention; FIG is a side view showing a forging machining state of the material shaft.

【図5】本発明の製造方法による素材の鍛伸加工を終えた状態を示す側面図である。 5 is a side view showing a state where finished extend forging processing of the material by the manufacturing method of the present invention.

【図6】本発明の製造方法により製造される鋼材の一端据込部のファイバフローの形成過程を示す図である。 6 is a diagram showing a formation process of a fiber flow of one upsetting portions of the steel material produced by the method of the present invention.

【図7】比較方法により製造される鋼材の一端部のファイバフローの形成過程を示す図である。 7 is a diagram showing a formation process of a fiber flow of the one end portion of the steel material produced by the comparison method.

【符号の説明】 DESCRIPTION OF SYMBOLS

10 素材(ビレット) 10a 一端据込部 12 下ダイス 12a 型 14 ポンチ 16 金敷 10 Material (billet) 10a end swaging portion 12 lower die 12a die 14 punch 16 anvil

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 長さL1と外径Dの比L1/Dが1〜3 1. A length L1 and the ratio of the outer diameter D L1 / D is 1 to 3
    である一端据込部と軸部とを有する棒材の前記一端据込部を据込比1/2 u以上に据え込んだ後、再結晶温度以下に再加熱し、前記軸部を鍛練比2s以上に鍛伸し、鍛伸した軸部の長さL2が2000mm以上であることを特徴とする長尺鋼材の鍛造方法。 After elaborate seated in upsetting ratio of 1/2 or more u the end swaging portion of the bar having one end swaging portion and the shaft portion is reheated below the recrystallization temperature, wrought ratio the shaft portion and forging above 2s, forging method of elongated steel, wherein the length L2 of the shaft portion and extend forging is not less than 2000 mm.
JP02663993A 1993-02-16 1993-02-16 Forging method of long steel Expired - Fee Related JP3256885B2 (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02663993A JP3256885B2 (en) 1993-02-16 1993-02-16 Forging method of long steel

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07171650A (en) * 1993-12-17 1995-07-11 Kobe Steel Ltd Hot swaging forging method
US6144367A (en) * 1997-03-26 2000-11-07 International Business Machines Corporation Method and system for simultaneous operation of multiple handheld control devices in a data processing system
JP2006181577A (en) * 2004-12-24 2006-07-13 Denso Corp Method for producing piping parts for high pressure and piping parts for high pressure
CN102836941A (en) * 2011-06-20 2012-12-26 日立金属株式会社 Production method of forging piece
CN105689611A (en) * 2016-03-06 2016-06-22 江苏海宇机械有限公司 Machining technology for single-end spline shaft sleeve
CN106238660A (en) * 2016-10-28 2016-12-21 河北科技大学 Combined forming device and combined forming method for motor shaft
CN106363117A (en) * 2016-11-17 2017-02-01 攀钢集团攀枝花钢铁研究院有限公司 Forging method for large-specification GH1016 round alloy rods

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07171650A (en) * 1993-12-17 1995-07-11 Kobe Steel Ltd Hot swaging forging method
US6144367A (en) * 1997-03-26 2000-11-07 International Business Machines Corporation Method and system for simultaneous operation of multiple handheld control devices in a data processing system
JP2006181577A (en) * 2004-12-24 2006-07-13 Denso Corp Method for producing piping parts for high pressure and piping parts for high pressure
CN102836941A (en) * 2011-06-20 2012-12-26 日立金属株式会社 Production method of forging piece
CN102836941B (en) * 2011-06-20 2015-05-20 日立金属株式会社 Production method of forging piece
CN105689611A (en) * 2016-03-06 2016-06-22 江苏海宇机械有限公司 Machining technology for single-end spline shaft sleeve
CN106238660A (en) * 2016-10-28 2016-12-21 河北科技大学 Combined forming device and combined forming method for motor shaft
CN106363117A (en) * 2016-11-17 2017-02-01 攀钢集团攀枝花钢铁研究院有限公司 Forging method for large-specification GH1016 round alloy rods

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