JPH02243741A - High hardness corrosion resistant and wear resistant stainless steel for induction hardening - Google Patents
High hardness corrosion resistant and wear resistant stainless steel for induction hardeningInfo
- Publication number
- JPH02243741A JPH02243741A JP6284689A JP6284689A JPH02243741A JP H02243741 A JPH02243741 A JP H02243741A JP 6284689 A JP6284689 A JP 6284689A JP 6284689 A JP6284689 A JP 6284689A JP H02243741 A JPH02243741 A JP H02243741A
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- induction hardening
- stainless steel
- high hardness
- steel
- 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
- 238000005260 corrosion Methods 0.000 title claims abstract description 17
- 230000007797 corrosion Effects 0.000 title claims abstract description 17
- 230000006698 induction Effects 0.000 title claims abstract description 16
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 9
- 239000010935 stainless steel Substances 0.000 title claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000010791 quenching Methods 0.000 abstract description 4
- 230000000171 quenching effect Effects 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、主にＩＣ製造装置や精密測定機、自動車部品
等に用いられるステンレス鋼製のシャフトを製造する時
に必要な高周波焼入に適した、高硬度で高耐食耐摩耗性
を有するステンレス鋼に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is suitable for induction hardening required when manufacturing stainless steel shafts used mainly in IC manufacturing equipment, precision measuring instruments, automobile parts, etc. The invention also relates to stainless steel with high hardness and high corrosion and wear resistance.
マルテンサイト系ステンレス鋼は、高硬度が得られるこ
と、また耐食性と耐摩耗性に優れることから、従来より
、ベアリング用途をはじめとじて多くの産業分野で広く
使用されている。マルテンサイト系ステンレス鋼のうち
主に使用されている鋼種は、ＪＩＳ ５ＵＳ４４０Ｇに
代表される高炭素−１７ｃｒ糸のものである。この鋼は
通常、ガス加熱炉または電気加熱炉により加熱され焼入
し、焼もどししてから使用されている。しかし最近では
、低コス）・化の要求から従来の焼入方法から高周波焼
入の方法が検討されつつある。高周波焼入れに際しては
、焼入性が良いこと力４角対条件であるが、５ＵＳ４４
０Ｇでは硬さ的に満足されていない。特に、表面を硬化
させて使用されるシャフト用途の場合、５ｔｌＳ４４０
Ｃを高周波焼入して得られる硬さは、せいぜいＨＲＣ５
３程度なので使用には全く供し得ない状況にある。Martensitic stainless steel has been widely used in many industrial fields, including bearing applications, because it has high hardness and excellent corrosion resistance and wear resistance. Among the martensitic stainless steels, the steel type mainly used is a high carbon-17cr yarn represented by JIS 5US440G. This steel is usually heated in a gas heating furnace or an electric heating furnace to harden it and then temper it before use. However, recently, due to the demand for lower cost, induction hardening methods are being considered instead of conventional hardening methods. For induction hardening, the condition is that the hardenability is good, and the force is squared with 5US44.
0G is not satisfactory in terms of hardness. Especially for shaft applications where the surface is hardened, 5tlS440
The hardness obtained by induction hardening C is at most HRC5.
Since it is around 3, it is in a situation where it cannot be used at all.
高周波焼入れによる焼入焼もどし処理後の硬さが１ｌＲ
ｃ５８以」−を示すマルテンサイト系ステンレスとして
知られているものには、例えば、特開昭４８８８０１４
号（Ｃ：０．７５−０．９５％、Ｓｉ ： ０．１−０
．５％、Ｍｎ：０．１−２．０％、Ｃｒ：１１．０−１
４．０％、Ｍｏ：０．１−１．５％、■二０．１−１．
０％、Ｆｅ：Ｂａ１）、特公昭５７−４５８２１号（Ｃ
：１．１−１．５％、Ｓｉ：５２．０％、Ｍｎ：５１．
０％、Ｃｒニア、ｏ−１１，０％、Ｍｏ：０．５−４．
０％、Ｖ ： ０．１−１．０％、Ｆｅ：Ｂａ１）、特
公昭６２−５６２２６号（Ｃ：］、２２〜１．６％Ｓｉ
：０．８〜１．６％、Ｍ ｎ ：１．０−１．５％、Ｃ
ｒ： ９−１２％、Ｍｏ：０．３−０．６％、Ｖ：Ｏ
，１，−０，８％、Ｆｅ：Ｂａ１）および特開昭６０−
２４３２４９号（Ｃ：０゜５−０．７％、Ｓｊ：１−２
％、Ｍｎ：５１．０％、Ｃｒ：９−１５％、ＭＯ＝１〜
３％、Ｆｅ：Ｂａ１）がある。Hardness after quenching and tempering treatment by induction hardening is 1lR
Examples of martensitic stainless steels with a grade of C58 or higher include, for example, Japanese Patent Application Laid-Open No. 4888014.
No. (C: 0.75-0.95%, Si: 0.1-0
．． 5%, Mn: 0.1-2.0%, Cr: 11.0-1
4.0%, Mo: 0.1-1.5%, ■2 0.1-1.
0%, Fe:Ba1), Special Publication No. 57-45821 (C
:1.1-1.5%, Si:52.0%, Mn:51.
0%, Cr near, o-11, 0%, Mo: 0.5-4.
0%, V: 0.1-1.0%, Fe:Ba1), Special Publication No. 62-56226 (C:], 22-1.6% Si
:0.8-1.6%, Mn: 1.0-1.5%, C
r: 9-12%, Mo: 0.3-0.6%, V:O
,1,-0,8%, Fe:Ba1) and JP-A-1988-
No. 243249 (C: 0°5-0.7%, Sj: 1-2
%, Mn: 51.0%, Cr: 9-15%, MO=1~
3%, Fe:Ba1).
すなわち、焼入性向」二のためにＭ ｎ、ＭＯを添加し
、また硬さを向上させるための炭素基は、炭化物形成元
素（耐摩耗性）との関係から限定されているものである
。That is, Mn and MO are added to improve hardenability, and carbon groups to improve hardness are limited due to their relationship with carbide-forming elements (wear resistance).
５ＵＳ４４０Ｃを初めとする前記の公知例では、以１ぐ
に述べる欠点により高周波焼入で簡単に熱処理し、高硬
度で高耐食耐摩耗性を有するシャフト制として使用する
には適さない。すなわち、５Ｏ３４４０Ｇでは、高Ｃ高
Ｃｒのため焼入性が悪（高周波焼入のように短時間で焼
入する装置では、硬さがＨＲＣ６０以上は出ない。また
残留オーステナイトが多くなることも硬さが出ないこと
の−・囚である。特開昭４８−８８０１４号で開示され
ている成分系では、基地のＣ量が不足し硬さは出ない。The above-mentioned known examples, including 5US440C, are not suitable for use as a shaft system that can be easily heat treated by induction hardening and has high hardness and high corrosion and wear resistance due to the drawbacks described below. In other words, 5O3440G has poor hardenability due to its high C and high Cr (with short-time hardening equipment such as induction hardening, the hardness cannot exceed HRC60. Also, a large amount of retained austenite causes hardness). The problem is that hardness does not appear.In the component system disclosed in JP-A-48-88014, the amount of C in the base is insufficient and hardness cannot be obtained.
特開昭５７−４５８２１号、特開昭６２−５６２２６号
ではＣＭに対しＣｒ量が少なく、耐食性が劣り、用途−
り問題がある。特開昭６０２４３２４９号も残留オース
テナイト量としては５ＵＳ４４０Ｃよりも少ないものの
硬さは低い。これらの公知例では、シャフト材として要
求されている硬さ１１Ｒｃ６０以上は達成されず、また
、耐食性においても、十分要求を満足していないのが現
状である。In JP-A-57-45821 and JP-A-62-56226, the amount of Cr is lower than that of CM, and the corrosion resistance is poor, making it difficult to use.
There is a problem. JP-A-60243249 also has a lower amount of retained austenite than 5US440C, but its hardness is low. These known examples do not achieve the hardness of 11Rc60 or more required for shaft materials, and currently do not sufficiently satisfy the requirements for corrosion resistance.
本発明の目的は、」−記の欠点を解消し、高周波焼入で
も少なくとも表面硬さがＨＲＣ６０以上の十分な硬さが
得られ、かつ高耐食耐摩耗性を有するステンレス鋼を提
供することである。The object of the present invention is to provide a stainless steel which eliminates the drawbacks mentioned in "-", can obtain sufficient surface hardness of at least HRC60 or higher even by induction hardening, and has high corrosion and wear resistance. be.
本発明は、重最比で、Ｃ：０．９６〜１．１０％、Ｓｊ
：０．８０−１．２０％、Ｍｎ：１．０％以下、Ｃｒ：
１２．００〜１５．００％、Ｍｏ： ０．３０−０．
７０％、Ｖ ：０．１０−０．３０％、残部Ｆｅおよび
不可避的不純物よりなることを特徴とする高周波焼入用
高硬度耐食耐摩耗ステンレス鋼である。The present invention has a maximum gravity ratio of C: 0.96 to 1.10%, Sj
:0.80-1.20%, Mn: 1.0% or less, Cr:
12.00-15.00%, Mo: 0.30-0.
70%, V: 0.10-0.30%, and the balance is Fe and unavoidable impurities.
以下に本発明における成分限定理由を述べる。The reasons for limiting the components in the present invention will be described below.
Ｃは基地の硬さを高くするために必要な元素であり、炭
化物を形成し耐摩耗性を向上させる。Ｃが０．９６％未
満では、高周波焼入に際して１ｌＲｃ６０以−１−の表
面硬さが得られない。Ｃを１．１０％を越えて添加する
と、本発明のＣｒ含有量では面１食性が劣化するので、
Ｃの範囲を０．９６〜１．１０％とした。C is an element necessary to increase the hardness of the base, forms carbides, and improves wear resistance. If C is less than 0.96%, a surface hardness of 11Rc60 or higher cannot be obtained during induction hardening. If C is added in excess of 1.10%, the monofacial corrosion property will deteriorate with the Cr content of the present invention.
The range of C was set to 0.96 to 1.10%.
Ｓｉは脱酸剤として添加されるが、焼もどし軟化抵抗を
大きくする効果がある。その効果は０．８０％未満では
小さく、かつ１，２０％を越えて添加しても、添加量に
見合う効果は得られない。したがって、Ｓｉ成分範囲を
０．８０−１．２０％とした。Si is added as a deoxidizing agent, and has the effect of increasing temper softening resistance. The effect is small if it is less than 0.80%, and even if it is added in excess of 1.20%, the effect commensurate with the amount added cannot be obtained. Therefore, the Si component range was set to 0.80-1.20%.
Ｍｎは脱酸剤および焼入性向上元素として添加するが、
１．０％を越えて添加してもその効果は少なく、したが
って上限を１．０％とした。Mn is added as a deoxidizing agent and a hardenability improving element, but
Adding more than 1.0% has little effect, so the upper limit was set at 1.0%.
Ｃｒは而・１食性を向」ニさせ、かつ炭化物を形成し耐
摩耗性を高める。１２．００％未満では本発明のＣ量で
は十分な耐食性が得られず、また１５．００％を越えて
添加すると焼入性が向上し、高周波焼入に際し、硬さＩ
ＩＲＣ６０以と得られない。したがって、Ｃｒの成分範
囲を１２．００〜１５．００％とした。Cr also promotes monolithic corrosion, forms carbides, and improves wear resistance. If the C content of the present invention is less than 12.00%, sufficient corrosion resistance cannot be obtained, and if it is added in excess of 15.00%, the hardenability improves and the hardness I
Cannot be obtained with IRC60 or higher. Therefore, the Cr component range was set to 12.00 to 15.00%.
Ｍｏは、焼入性を向」ニさせ、結晶粒を微細化し靭性を
向上させるために添加する。また、ＭＯは耐食性をも向
上させるが、０．３０％未満ではこれらの効果が少なく
、０．７％を越えて添加しても、添加量に見合う効果は
得られない。したがって、ＭＯの成分範囲を０．３０〜
０．７０％とした。Mo is added to improve hardenability, refine crystal grains, and improve toughness. Moreover, MO also improves corrosion resistance, but if it is less than 0.30%, these effects are small, and even if it is added in excess of 0.7%, no effect commensurate with the amount added can be obtained. Therefore, the component range of MO is 0.30~
It was set to 0.70%.
■は、ＶＣ炭化物を形成し、結晶粒を微細化し靭性を高
める効果がある。本発明では、炭化物として基地中のＣ
を固定し焼入に際してできるだけ固溶させないようにし
た。すなわち、基地中のＣを低下させ残留オーステナイ
ト量をできるだけ少なくするために添加するものである
。０．１０％未満ではその効果が少なく、０．３０％を
越えて添加すると、巨大炭化物を形成し靭性を劣化させ
るとともに、基地のＣ量が低下し硬さが低下する。した
がって、■の成分範囲としては、０．１０〜０．３０％
とした。(2) forms VC carbide, which has the effect of refining crystal grains and increasing toughness. In the present invention, C in the base as carbide is
was fixed and prevented from forming a solid solution as much as possible during quenching. That is, it is added to lower the C content in the matrix and to minimize the amount of retained austenite. If it is less than 0.10%, the effect is small, and if it is added in excess of 0.30%, giant carbides are formed and toughness is deteriorated, and the amount of C in the base is reduced, resulting in a decrease in hardness. Therefore, the component range for ■ is 0.10 to 0.30%
And so.
以下に本発明の実施例を示す。 Examples of the present invention are shown below.
第１表は、本実施例に用いた合金の成分（重量％）と硬
さの測定値を示すものである。Table 1 shows the components (% by weight) and measured values of hardness of the alloys used in this example.
上記第１表の成分の鋼塊から熱間圧延と冷間加工により
φ８碓の棒鋼を製造し、高周波焼入テストを行った。Steel bars with a diameter of 8 mm were produced by hot rolling and cold working from steel ingots having the components shown in Table 1 above, and were subjected to induction hardening tests.
高周波焼入条件は、１１００℃でコイル移動速度は、１
２．５ｍｍ／ｓｅｃとし、水冷で急冷した後、焼もどし
は１８０℃×１時間保持後空冷とした。The induction hardening conditions are 1100℃ and the coil moving speed is 1
After quenching with water at a speed of 2.5 mm/sec, tempering was carried out at 180° C. for 1 hour, followed by air cooling.
従来合金のうち、試料番号６ないし９は、前記の特許公
報に記載の代表的な合金である。また、第１表には、５
Ｏ３４４０Ｇについての評価も記載されている。Among the conventional alloys, sample numbers 6 to 9 are typical alloys described in the above-mentioned patent publication. Also, in Table 1, 5
Evaluations regarding O3440G are also described.
硬さの評価は、シャフト類の最も必要とされる最表面か
ら１１１Ｉｍ深さの位置におけるビッカース硬さの測定
により行なった。The hardness was evaluated by measuring the Vickers hardness at a depth of 111 Im from the outermost surface of the shaft, where it is most needed.
従来合金は、いずれもＨＲＣ換算でＨＲＣ６０以下であ
り、硬さが不十分であるが、本発明合金は、いずれもＨ
Ｖ７００以上（ＨＲＣ換算６０．１以」−）を示してお
り、目標の硬さが得られた。All of the conventional alloys have an HRC of 60 or less in terms of HRC and have insufficient hardness, but the alloys of the present invention all have an HRC of 60 or less.
It showed V700 or higher (HRC equivalent: 60.1 or higher), and the target hardness was obtained.
第１図は、試料番号１，２と５ＩＩＳ４４０Ｇについて
の深さ方向の硬さ分布を示したが、本発明合金はビッカ
ース硬さで７００以上（（ＩＩＲｃ換算６０．１以上）
を示しており、５ＵＳ４４０Ｃと対比して１１標とする
硬さが達成されていることがわかる。また、第２図に塩
水噴霧試験における耐食性テスト結果を示したが、４４
００列比で本発明合金は同等以上の耐食性を示すことが
わかる。Figure 1 shows the hardness distribution in the depth direction for sample numbers 1, 2 and 5IIS440G, and the alloy of the present invention has a Vickers hardness of 700 or more ((IIRc equivalent: 60.1 or more)
It can be seen that a hardness of 11 standards has been achieved compared to 5US440C. In addition, Fig. 2 shows the corrosion resistance test results in the salt spray test.
It can be seen that the alloy of the present invention exhibits equivalent or higher corrosion resistance in terms of the 00 series ratio.
以上のように、本発明によれば、簡易な焼入方法である
高周波焼入により、少なくとも表面部は１１ＲＣ６０以
上の硬さが得られるので、高硬度で高耐食耐摩耗性を有
するシャフト拐等を容易に製造することができる。As described above, according to the present invention, by induction hardening, which is a simple hardening method, a hardness of 11RC60 or more can be obtained at least in the surface portion, so shaft cracking etc. with high hardness and high corrosion and wear resistance can be achieved. can be easily manufactured.
Claims (1)
８０〜１．２０％、Ｍｎ：１．０％以下、Ｃｒ：１２．
００〜１５．００％、Ｍｏ：０．３０〜０．７０％、Ｖ
：０．１０〜０．３０％、残部Ｆｅおよび不可避的不純
物よりなることを特徴とする高周波焼入用高硬度耐食耐
摩耗ステンレス鋼。1 Weight ratio: C: 0.96-1.10%, Si: 0.
80-1.20%, Mn: 1.0% or less, Cr: 12.
00-15.00%, Mo: 0.30-0.70%, V
:0.10 to 0.30%, the balance being Fe and unavoidable impurities.High hardness, corrosion and wear resistant stainless steel for induction hardening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6284689A JP2859287B2 (en) | 1989-03-15 | 1989-03-15 | High hardness corrosion-resistant wear-resistant stainless steel for induction hardening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6284689A JP2859287B2 (en) | 1989-03-15 | 1989-03-15 | High hardness corrosion-resistant wear-resistant stainless steel for induction hardening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02243741A true JPH02243741A (en) | 1990-09-27 |
| JP2859287B2 JP2859287B2 (en) | 1999-02-17 |
Family
ID=13212081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6284689A Expired - Lifetime JP2859287B2 (en) | 1989-03-15 | 1989-03-15 | High hardness corrosion-resistant wear-resistant stainless steel for induction hardening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2859287B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07238348A (en) * | 1994-02-25 | 1995-09-12 | Sanyo Special Steel Co Ltd | Steel with rust resistance and wear resistance for induction hardening |
-
1989
- 1989-03-15 JP JP6284689A patent/JP2859287B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07238348A (en) * | 1994-02-25 | 1995-09-12 | Sanyo Special Steel Co Ltd | Steel with rust resistance and wear resistance for induction hardening |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2859287B2 (en) | 1999-02-17 |
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