JPS5967365A - Production of machine parts - Google Patents
Production of machine partsInfo
- Publication number
- JPS5967365A JPS5967365A JP17736682A JP17736682A JPS5967365A JP S5967365 A JPS5967365 A JP S5967365A JP 17736682 A JP17736682 A JP 17736682A JP 17736682 A JP17736682 A JP 17736682A JP S5967365 A JPS5967365 A JP S5967365A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- strength
- soft nitriding
- steel
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
Abstract
Description
【発明の詳細な説明】
本発明は、１成域部品どくに自動車部品のＩＪＩ！Ｉ造
方法に関りる。[Detailed Description of the Invention] The present invention focuses on IJI of automobile parts! It is related to the I-building method.
クランクシトノドのＪ：うな自動車部品は、強度と耐摩
耗ｆ１−どをあ４つμぞなえなりればならない。Crankshaft's J: For automobile parts, strength and wear resistance must be compared to four factors.
従来、この種のものは、機械構造用炭素（Ｈを材料と（
〕で、＠造なとの技術で加工したのち、軟窒化処理を施
し−Ｃ表面を硬化さ口てＦＪＡ造していた。Conventionally, this type of product has been made of mechanical structural carbon (H) and (
], and after processing it using @-made technology, soft nitriding treatment was applied to harden the -C surface, and FJA was made.
自動車の一層のｉ！ｆｆｉ化の要請にこたえるためには
、クランクシレノ１〜などの部品を、強度と耐久性をＩ
ｆｆ持したまま細く軽量にづ゛る必要がある。Even more i for cars! In order to meet the demand for FFI, parts such as Crank Sireno 1 must be improved in strength and durability.
It is necessary to make it thin and lightweight while maintaining FF.
この「１的には、材料として軟窒化用鋼を用いるのが効
果的なこと（ま明らかである。 どころが、クランクシ
１１）１〜のように回転゛りる部品は仕上げ■程′Ｃ歪
みを矯正りる必要があり、イの際に割れが発生覆ること
がある。 このａ３それは、軟窒化を効果的に行なった
場合に大きい。It is obvious that it is effective to use steel for soft nitriding as the material.However, parts that rotate like crankshafts 11) and 1~ are subject to distortion during the finishing process. It is necessary to straighten the cracks, and cracks may occur and be covered during a.This a3 is large when nitrocarburizing is performed effectively.
従って、機械部品とくにクランクシャフトのような自動
車部品の’Ｊｉ！ｌ造において、強度および耐摩耗性を
一層向上七＼１１しかも歪取りの変形に耐えて＾い製品
歩留りを！ｊえる軟窒化製品のＹＡ造技術が求められて
いた。Therefore, 'Ji!' of mechanical parts, especially automobile parts such as crankshafts! Further improve the strength and abrasion resistance of L construction, and achieve a product yield that can withstand deformation during strain relief! There was a need for YA manufacturing technology for soft nitrided products.
木発明者らは、この要望にこたえることを意図して研究
し、材料どする軟窒化用鋼の組成の選択と、特定の熱処
理との組み合わけによりこの１］的を達成Ｃきることを
見出した。The inventors conducted research with the intention of meeting this demand, and found that it was possible to achieve this goal by selecting the composition of the steel for soft nitriding and combining it with a specific heat treatment. Ta.
本発明の機械部品の製造方法は、Ｃ：０．５％以下、Ｃ
ｒ ：０．５％以下、△Ｉ：Ｏ，’２％以下ａ３よびＶ
：０．３％以下を合有し、残部が「ｅａ＞Ｊ：び不可避
の不純物からなる鋼を加−「して所望の機械部品の形状
を与え、熱処理を行なって含有されでいるＶの少なくど
も一部を析出さけたのち軟窒化処理を施すことを特徴と
する。The method for manufacturing mechanical parts of the present invention includes C: 0.5% or less, C
r: 0.5% or less, △I: O, '2% or less a3 and V
: 0.3% or less, and the remainder consists of ea>J: It is characterized in that after at least a part of it is precipitated, soft nitriding treatment is performed.
上記の合金組成を選択した理由は、次のと４３っである
。The reason for selecting the above alloy composition is as follows.
Ｃ：０．５％以下 Ｃは芯部梗さを向上させ、強度を高める。C: 0.5% or less C improves core stiffness and increases strength.
多量に添加すると、靭性ど被加工性を損うので、上記の
限界内とする。If added in a large amount, the toughness and workability will be impaired, so it should be within the above limits.
Ｃｒ ： ０．５％以下、Δ１ ：０．２％以下これら
の元素は窒化１１を向上さける。 過大にｒ７在りると
硬化層深さが著しく深くなり、後に）ホベるように矯正
性が劣ってくる。Cr: 0.5% or less, Δ1: 0.2% or less These elements avoid improving nitridation 11. If r7 is excessively large, the depth of the hardened layer will become extremely deep, and the straightening properties will deteriorate, such as hoovering (later).
Ｖ：０．３％以ト
芯部硬ｉ＼の向上にイｊ用であるほか、次にＨ＋２明り
る硬化層深さ」ンｌ−［１−ルの役割をはたＪｏ 多量
に添加すると靭１イ１を低下させるし、不経済Ｃ゛ある
。V: 0.3% or more In addition to being useful for improving the core hardness i\, it also plays the role of hardening layer depth 'nl-[1-l] when added in large amounts. It reduces toughness 1-1 and is uneconomical.
添加したＶの少なくとも一部を析出さｌ゛るには、へｃ
１変態温度以下での焼きなましを覆るか、熱間椴；＾後
に徐冷または等温保持をづればにい。 この処理は、軟
窒化処理にＪ、り生じる硬化層深さが、好ましくない稈
度まで増大Ｊることを防１１−覆る効果をｂつ。In order to precipitate at least a part of the added V,
Annealing below the 1st transformation temperature should be covered or heated, followed by slow cooling or isothermal holding. This treatment has the effect of preventing the hardened layer depth caused by the nitrocarburizing treatment from increasing to an undesirable culm degree.
木発明者らの知見によれば、軟窒化製品の強度は硬化層
深さと深部硬さ、すなわちト１ｖ −３００が得られる
表面からの深さによつ−Ｃ決定され、より高い強度を臂
るには、これらの値を高くづ゛ればよい。 一方、矯正
法は硬化層深さにより支配され、浅い方が割れ同い。
この硬化層深さについて相反づる要求の調和点として選
択された、りｒましい硬化層深さの範囲が、０．０２〜
０．１５ｍｍである。、 刃なりも、強度を（市保゛り
るには０．０２ｎｖ以１−の硬化層深さが必要であり、
矯正性を低下させないためには０．１５１１＋Ｉ＋＋が
限界となる。According to the knowledge of the wood inventors, the strength of nitrocarburized products is determined by the depth of the hardened layer and the deep hardness, that is, the depth from the surface at which 1V -300 is obtained. To increase the value, you can increase these values. On the other hand, the straightening method is controlled by the depth of the hardened layer, and the shallower the layer, the more likely it is to crack.
The preferred hardened layer depth range is 0.02~
It is 0.15 mm. In order to improve the strength of the blade, a hardened layer depth of 0.02nv or more is required.
The limit is 0.1511+I++ in order not to reduce the correctability.
軟窒化処理は、當用のＮ １．、＋３／ ＲＸ混合ガス
による処理を（、Ｌじめとして、液体の軟窒化剤やイオ
ン窒化など、既知の技術に従って実施りれｔ、【よい。The soft nitriding treatment is carried out using N1. , +3/RX mixed gas treatment can be carried out according to known techniques, such as liquid soft nitriding agent or ionic nitriding.
本発明の実施に当って、所望であれば、材料の合金成分
どじで、前記した必須元糸ｃ、ｃｒ、△１ｄ３Ｊ：びＶ
に加えて、下記のグループの元素を一または二部上組み
合わせて添加し、（Ｊｌ記したような効果を（ｑること
もできる。In practicing the present invention, if desired, the above-mentioned essential base threads c, cr, Δ1d3J: and V
In addition, it is also possible to add one or more of the elements of the following groups in combination to produce the effects described below.
ＯＴｉ 、Ｚｒ ：いずれも０．３％以下の１種または
２種・・・析出硬化
ＯＮｂ ＋−１−ａ ： ０．３％以下・・・軟窒化性
のコン１〜ロール
ＯＳｉ、Ｍｎ、ＣＬＩ、Ｍｏ、Ｗ、Ｃｏ：おのおの１．
５％以下・・・基地強化
Ｏ８：０．１５％以下、Ｐｂ Ｉ−Ｔｆ１！ ： ０．
４％以上、Ｓ（！ ： ０．３％以上の１種または２
種以上・・・被削ｆＪｌ＝ Ｉ＋’ｉｌ ｌ本発明の／
’Ｊ ｖｈは、代表とし−Ｃあけたクランクシト−２１
−のはか、」１ン【１ツド、足回りスピンドル、（（へ
るいは１−一ションバーなど、各種の鍛造とし−Ｃ強度
ａ３ Ｊ、び耐摩耗性を向Ｌ（′！（↓で用いる部品の
製造に好適である１、 な（１り、切削加工して軟窒化
処Ｊｊｌｉ ｌノ製品どづるｂのにも適用できることは
、いう５１：でｔ）ない。OTi, Zr: 1 or 2 types, both 0.3% or less... Precipitation hardening ONb +-1-a: 0.3% or less... Soft nitriding CON 1 to roll OSi, Mn, CLI , Mo, W, Co: 1.
5% or less...Base reinforcement O8: 0.15% or less, Pb I-Tf1! : 0.
4% or more, S (!: 0.3% or more type 1 or 2
More than species...workpiece fJl = I+'il l of the present invention/
'J vh is representative - C open crank seat - 21
-The body is made of various forged materials such as the undercarriage spindle, the undercarriage spindle, and the 1-1 shock bar. It is suitable for manufacturing parts used in the manufacturing of parts.
実−一兇−」」
第１表に示−り組成（残部はトｅＪ５よび不純物）の８
ｆ４を）容製しＩこ。 シ仁印を（＝ｉ ｌ、 ／こも
の、リ−なわちＤ：計、［ニド、ｌ−１＊ ｄ３よびＪ
：Ｉ＝は本発明の範囲外の組成をｂつだ鋼である。8 of the composition shown in Table 1 (the remainder is ToeJ5 and impurities)
f4). Shinin seal (=i l, /komono, li-i.e. D: total, [nido, l-1* d3 and J
:I= is steel with a composition outside the scope of the present invention.
これらの鋼を径８４ｍ１′Ｉｌの丸棒に圧延し、１２０
０℃におい’Ｕ ｇＱ 造して、自動車エンジンのクラ
ンクシト）１−をつくった。These steels were rolled into round bars with a diameter of 84 m1'Il, and
An automobile engine crankshaft (1-1) was prepared at 0°C.
これを下記の条ｊ’ｌ ｒ熱処理したのら、Ｉ＝ｌ：（
比較例）：鍛造後空冷
■（本発明）：鍛造後６５０℃に２時間保持したのち空
冷
■（本発明）：鍛造後いったｌυ空冷しＣ’ ｈ）ｌう
再び（３２０℃に１時間加熱したのら空冷
（成域加工をへ′Ｃ軟窒化処理した。 軟窒化は、Ｎ＋
−１３／ＲＸ＝１／１の混合ガス雰囲気を用い、５８０
°ＣＸ ９０分間処理して、油冷Ｊる方法によった。After heat-treating this as described below, I=l:(
Comparative example): Air cooling after forging ■ (Invention): After forging, holding at 650°C for 2 hours, then air cooling ■ (Invention): Air cooling after forging C' h) l Again (at 320°C for 1 hour) After heating, air cooling (area processing was carried out) Carbon nitrocarburizing treatment was carried out.N+
-13/RX=1/1 mixed gas atmosphere, 580
The sample was treated at °C for 90 minutes and cooled in oil.
各製品クランクシ１ｒ７１へについて、矯正を行なっで
、イのときの割れの発生の有無を記録した。The crankshaft 1r71 of each product was straightened, and the presence or absence of cracks was recorded.
ぞれどどしに、疲労試験を行なって強度をしらへた。
まｌζ、ｔ−１ｖ ＝３００の得られる表面からの深さ
Ｆ’Ｊ Ｈｖ ３０（１（ｍｍ ）を測定した。We conducted fatigue tests on each to determine their strength.
The depth F'J Hv 30 (1 (mm)) from the surface obtained at 1ζ, t-1v = 300 was measured.
それらの結果を、熱処理条件とともに第２表に承り。
なａ−タ、強度向上率（％）は、現在常用され゛ている
ｆ！各秤Ｓ ４．８ Ｇを用いて製造し、軟窒化処ｊｌ
ｌｌをＭＩｉシたクランクシＶ７１−を基準にしたｆｉ
ｌである。The results are shown in Table 2 along with the heat treatment conditions.
The data and strength improvement rate (%) are f!, which is currently commonly used. Manufactured using each scale S 4.8 G and soft nitrided
fi based on cranksha V71- which is MIi
It is l.
以上の記載から明らかなように、本発明の機械部品の製
造方法は、材料組成の最適設定どＶの析出硬化９８理を
効果的に組合せた軟窒化処理を施づことににす、高強度
と耐摩耗１イｌを第１！ねそなえｌこ侵れた特性の製品
が歩留りよく製造できる特徴を右し、どくに自動車部品
のにうな軽量化ニーズの高い部品の製造方法として、き
わめて有効である。As is clear from the above description, the method for manufacturing mechanical parts of the present invention involves performing a soft nitriding treatment that effectively combines the 98 precipitation hardening processes, including optimal setting of material composition, and high strength. And wear resistance 1l is the first! This method has the advantage of being able to manufacture products with very poor characteristics at a high yield, and is extremely effective as a method for manufacturing parts that are particularly in need of weight reduction, such as automobile parts.
Claims (3)
ｌ：０．２％以下ｄ３よびＶ：０．３％以トを含イｊし
、残部が１−（うおよび不可避の不純物からなる柑を加
−１１Ｊで所望の機械部品の形状を！ｊえ、熱処理を行
な・）で金石されているＶの少なくとも一部を析出さけ
たのち軟窒化処ＩＱ！を施づことを特徴とりる機械部品
のｒＩＪ、遣方法。(1) C: 0.5% or less, Cr: 0.5% or less, △
1: Contains 0.2% or less d3 and V: 0.3% or more, with the remainder consisting of 1-(U) and unavoidable impurities. After heat treatment is performed to precipitate at least a portion of the V contained in gold ore, soft nitriding treatment IQ! rIJ and how to use mechanical parts, which is characterized by applying.
硬さの１りられる硬化ＦＶ：＋Ｅさを０．０２〜０．
１５ｍ１ｌｌの範囲にえらぶ特許請求の範囲第十′項の
製造方法。(2) Soft nitriding treatment FINCI3, hardness of l-1v300, hardening FV: +E 0.02 to 0.
The manufacturing method according to claim 10, which is selected within the range of 15 ml.
コンロッド、足回りスピンドルまたはトーションバーで
ある特許請求の範囲第１項または第２３ｆｊの製造方法
。(3) Parts in the I area are automotive cranksima 71~,
The manufacturing method according to claim 1 or 23fj, which is a connecting rod, an undercarriage spindle, or a torsion bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17736682A JPS5967365A (en) | 1982-10-08 | 1982-10-08 | Production of machine parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17736682A JPS5967365A (en) | 1982-10-08 | 1982-10-08 | Production of machine parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5967365A true JPS5967365A (en) | 1984-04-17 |
| JPS6127460B2 JPS6127460B2 (en) | 1986-06-25 |
Family
ID=16029698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17736682A Granted JPS5967365A (en) | 1982-10-08 | 1982-10-08 | Production of machine parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5967365A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6179932B1 (en) * | 1990-11-20 | 2001-01-30 | Daidousanso Co., Ltd. | Motor rotary shaft and manufacturing method thereof |
| JP2001122077A (en) * | 1999-07-02 | 2001-05-08 | Takata Corp | Torsion bar for seat belt winding device |
| FR2847910A1 (en) * | 2002-12-03 | 2004-06-04 | Ascometal Sa | Fabrication of forged steel component for internal combustion engine crankshaft comprises producing and casting a steel, forging a blank, effective controlled cooling of blank, machining and performing mechanical reinforcement |
| JP2005171331A (en) * | 2003-12-12 | 2005-06-30 | Jfe Steel Kk | Steel sheet for soft nitriding having excellent formability, and its production method |
| JP2007038250A (en) * | 2005-08-02 | 2007-02-15 | Honda Motor Co Ltd | Die for forging and producing method therefor |
| JP2007038249A (en) * | 2005-08-02 | 2007-02-15 | Honda Motor Co Ltd | Die for forging and producing method therefor |
| JP2012177167A (en) * | 2011-02-28 | 2012-09-13 | Jfe Steel Corp | Steel sheet for soft nitriding treatment, and its manufacturing method |
| WO2014002288A1 (en) * | 2012-06-27 | 2014-01-03 | Ｊｆｅスチール株式会社 | Steel sheet for soft nitriding and process for producing same |
| US10301698B2 (en) | 2012-01-31 | 2019-05-28 | Jfe Steel Corporation | Hot-rolled steel sheet for generator rim and method for manufacturing the same |
| CN110029264A (en) * | 2019-04-12 | 2019-07-19 | 江苏利淮钢铁有限公司 | A kind of low cost 40CrV tool steel and its production method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49125234A (en) * | 1973-04-09 | 1974-11-30 |
-
1982
- 1982-10-08 JP JP17736682A patent/JPS5967365A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49125234A (en) * | 1973-04-09 | 1974-11-30 |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6179932B1 (en) * | 1990-11-20 | 2001-01-30 | Daidousanso Co., Ltd. | Motor rotary shaft and manufacturing method thereof |
| JP2001122077A (en) * | 1999-07-02 | 2001-05-08 | Takata Corp | Torsion bar for seat belt winding device |
| FR2847910A1 (en) * | 2002-12-03 | 2004-06-04 | Ascometal Sa | Fabrication of forged steel component for internal combustion engine crankshaft comprises producing and casting a steel, forging a blank, effective controlled cooling of blank, machining and performing mechanical reinforcement |
| EP1426453A1 (en) * | 2002-12-03 | 2004-06-09 | Ascometal | Process for the production of a steel forged part and part obtained thereof |
| JP2005171331A (en) * | 2003-12-12 | 2005-06-30 | Jfe Steel Kk | Steel sheet for soft nitriding having excellent formability, and its production method |
| JP2007038250A (en) * | 2005-08-02 | 2007-02-15 | Honda Motor Co Ltd | Die for forging and producing method therefor |
| JP2007038249A (en) * | 2005-08-02 | 2007-02-15 | Honda Motor Co Ltd | Die for forging and producing method therefor |
| JP2012177167A (en) * | 2011-02-28 | 2012-09-13 | Jfe Steel Corp | Steel sheet for soft nitriding treatment, and its manufacturing method |
| US10301698B2 (en) | 2012-01-31 | 2019-05-28 | Jfe Steel Corporation | Hot-rolled steel sheet for generator rim and method for manufacturing the same |
| WO2014002288A1 (en) * | 2012-06-27 | 2014-01-03 | Ｊｆｅスチール株式会社 | Steel sheet for soft nitriding and process for producing same |
| US10077485B2 (en) | 2012-06-27 | 2018-09-18 | Jfe Steel Corporation | Steel sheet for soft-nitriding and method for manufacturing the same |
| CN110029264A (en) * | 2019-04-12 | 2019-07-19 | 江苏利淮钢铁有限公司 | A kind of low cost 40CrV tool steel and its production method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127460B2 (en) | 1986-06-25 |
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