JPS58123861A - Hot working tool steel - Google Patents

Hot working tool steel

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Publication number
JPS58123861A
JPS58123861A JP503882A JP503882A JPS58123861A JP S58123861 A JPS58123861 A JP S58123861A JP 503882 A JP503882 A JP 503882A JP 503882 A JP503882 A JP 503882A JP S58123861 A JPS58123861 A JP S58123861A
Authority
JP
Japan
Prior art keywords
temperature
tool steel
types
work tool
hot work
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
Application number
JP503882A
Other languages
Japanese (ja)
Other versions
JPH0260748B2 (en
Inventor
Kazuo Ito
一夫 伊藤
Yoshitomo Hitachi
常陸 美朝
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP503882A priority Critical patent/JPS58123861A/en
Publication of JPS58123861A publication Critical patent/JPS58123861A/en
Publication of JPH0260748B2 publication Critical patent/JPH0260748B2/ja
Granted legal-status Critical Current

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  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE:To enhance the toughness of a steel contg. prescribed amounts of C, Si, Mn and Mo as basic components and Cr, Ni, etc. and the wear resistance at high temp. by heat treating the steel at a prescribed temp. so as to allow untransformed austenite to remain by >=5vol%. CONSTITUTION:The titled tool steel consists of 0.1-0.6% C, <=2% Si, <=2% Mn and 0.1-7% Mo as basic components, 2.6-7% Cr and/or 1-5% Ni, one or more among 0.01-3% V, 0.01-7% W, 0.001-0.5% Ti, 0.001-0.5% Zr and 0.001-0.5% Nb and the balance Fe. The steel is austenitized at the Ac3 point or above, hardened and lonnealed at <=500 deg.C so as to allow untransformed austenite to remain by >=5vol%.

Description

【発明の詳細な説明】 本願発明は性能の良好な熱間工具鋼に関し、さらに詳し
くは高温での耐摩耗性にとくにすぐれ、かつ十分な靭性
を有する熱間工具鋼に関すゐものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot work tool steel with good performance, and more particularly to a hot work tool steel that has particularly excellent wear resistance at high temperatures and sufficient toughness.

従来の熱間工具鋼にはJIS 8KD61に代表される
SCr系熱間工具鋼、 Al8I HIG O3Cr 
−3Mo 系熱n1lIA鋼、 0.220−3Ni−
3* K代表される析出硬化系熱間工具鋼かあ〕、用途
に応じて使いわ妙られている。それらを熱処理状態で区
分すると、前2者系の熱間工具鋼は焼なまし状態で金1
1に粗加工し、その後焼入焼もどしO調質を行り九0ち
精加工して型打ちに供されるのに対して、後者の析出硬
化形系の熱間工具鋼はあらかじめ調質し良状態で金型加
工が行なわれる。いわゆるプレハードン鋼である。
Conventional hot work tool steels include SCr hot work tool steel represented by JIS 8KD61, Al8I HIG O3Cr
-3Mo-based thermal n1lIA steel, 0.220-3Ni-
3* Precipitation hardening hot work tool steel represented by K) is used differently depending on the application. Classifying them by heat treatment state, the former two types of hot work tool steel have a gold content of 1% in the annealed state.
1, then undergoes quenching, tempering, O-temperature refining, and 90-degree precision processing before being subjected to stamping, whereas the latter type of precipitation-hardened hot tool steel is pre-heated and tempered. Mold processing is carried out in good condition. This is so-called pre-hardened steel.

これらの鋼の焼入れは熱間工具鋼として必要な靭性と耐
摩耗性を確保する九めにいずれ4油冷などによル出来る
だけ早く冷却するのが一般的であ〕、そのため使用面あ
るーは性能面でさまざまな制約があり九。すなわち前2
者の熱間工具鋼は必要な耐摩耗性を確保するためHHC
48前後に調質するのが一般的であるが、これは切削加
工が困難な硬さであ〕、面下は加工のときはその都度焼
なまし一再調質をしなければならない。また、この系統
の熱間工具鋼は一般に600℃以上の高温部もどし処理
がされるため高温での軟化が早いことと、靭性も低いた
めワレのトラブルが生じやすいという欠点がある。
When quenching these steels, it is common to cool them as quickly as possible by oil cooling to ensure the toughness and wear resistance necessary for hot-working tool steels. There are various constraints in terms of performance. i.e. front 2
The hot work tool steel of
It is common to heat the material to around 48°C, but this is a hardness that is difficult to cut], and the subsurface must be annealed and re-tempered each time it is processed. In addition, hot work tool steels of this type are generally subjected to high-temperature heating treatment at 600° C. or higher, so they soften quickly at high temperatures, and have low toughness, which makes them prone to cracking.

一方、後者の析出硬化形系熱間工具14杜前2者系の熱
間工具鋼の欠点を改善し九プレハードン鋼であるが、こ
れにも一長一短がToシ用途が著しく制限されている。
On the other hand, the latter precipitation-hardened hot work tool steel is a pre-hardened steel that improves the drawbacks of the former two-way hot work tool steel, but it also has advantages and disadvantages that severely limit its use.

すなわち、その硬化機構はM・2Cなどの炭化物の析出
によるものであるが、油焼入れで切削加工可能な硬さH
RC≦45とする九めC添加量はQJX前後と低く限定
される。したがって熱間工具鋼として必要な強lを確保
するためKM・、V、Wなど炭化物形成元素を多量に添
加しなければならないし、さらKt丸焼もどしは450
℃以下の低温部もどしに限定されるため、熱処理残留応
力が高くて金型加工中ならびKll打初期にワレが発生
しやすいという欠点があ−)え。
In other words, the hardening mechanism is due to the precipitation of carbides such as M and 2C, but the hardness H is such that it can be cut by oil quenching.
The amount of added C to satisfy RC≦45 is limited to around QJX. Therefore, in order to secure the strength required for hot work tool steel, a large amount of carbide-forming elements such as KM, V, and W must be added, and the Kt tempering is 450.
Since it is limited to returning the low temperature part below ℃, there is a drawback that the heat treatment residual stress is high and cracks are likely to occur during mold processing and at the initial stage of punching.

最近の熱間鍛造業界の技術的進歩は著しく、鍛造作業O
自動化、高速化には目ざましいものかあ)、それにとも
なりて長寿命が得られかつ信頼性の高い熱間工具鋼のニ
ーズが高まりてきfI−が、従来の熱間工具鋼でFiこ
のような新しい情勢に対処できなくな)りつあル、それ
らに代る靭性と高温での耐摩耗性にすぐれ、長寿命が得
られる新しい熱間工具鋼の開発が強く要望されている。
Recent technological advances in the hot forging industry have been remarkable, and forging operations
As automation and speed increases are remarkable, there is an increasing need for hot work tool steel that has a long life and high reliability. There is a strong demand for the development of a new hot work tool steel that has excellent toughness, high wear resistance at high temperatures, and has a long service life.

本願発明者等は上記要求に対処して、靭性と耐摩耗性と
いう相反する特性をともに改善するには未変態の残留オ
ーステナイトを活用するのが最も好適な方法であるとい
う全く新しい知見に基づいて本願発−−成した。
The inventors of the present application have addressed the above requirements based on the completely new knowledge that the most suitable method for improving both the conflicting properties of toughness and wear resistance is to utilize untransformed retained austenite. This application was originally published.

を すなわち、本願発明は (1)  C:0.10〜0.4! OX、 8 i 
:lO魁任9M鳳:20驕J。
That is, the present invention has (1) C: 0.10 to 0.4! OX, 8i
:lO Kaito 9M Otori: 20驕J.

M * :0.10〜7.OXを基本合金成分とし C
、:2−6〜7.ON、 Nl : 1.0をごヒ40
Xを1種以上を含有し、さらK V: 101〜3LO
X、 W: &01〜7.0%、 Ti:Q、001〜
G、5X、 Zr:0.001〜0.5%、 Nb:0
.001〜0.5%の1種以上を含有せしめ残部が実質
的にF・からなる合金工具鋼においてAC3以上の温度
でオーステナイト化したのち焼入をし、しかるのちSO
O℃以下の温度で低温焼もどしを行i1未変態オーステ
ナイトが体積率で5%以上残留しているととを特徴とす
る熱間工具鋼。
M*: 0.10-7. With OX as the basic alloy component, C
, :2-6~7. ON, Nl: 1.0 please 40
Contains one or more types of X, further K V: 101-3LO
X, W: &01~7.0%, Ti:Q, 001~
G, 5X, Zr: 0.001-0.5%, Nb: 0
.. An alloy tool steel containing at least one type of 001 to 0.5% with the remainder being substantially F is austenitized at a temperature of AC3 or higher, then quenched, and then SO
1. A hot work tool steel characterized by being tempered at a low temperature at a temperature of 0° C. or lower, and having 5% or more of i1 untransformed austenite remaining in terms of volume fraction.

(2)  C: 0.1ONto覧191 : !OX
軒e M m : LOj^σ。
(2) C: 0.1 ONto list 191: ! OX
Eaves e M m: LOj^σ.

Mo : Q、10〜’1.0%を基本合金成分とし、
Cr:2、.6〜7.0%、 Ni : i、otζえ
〜&Oにを1種以上ならびK 、V : Q、Q 1−
3.ON、 W: Oao 1〜7.ON、 T i:
 o、o o 1〜0.5%、 z r : o、o 
o x〜o、s%、Nh:o、001〜115%の1種
以上を含有し、さらにCw:3LO’XKF、Co :
 Q、05〜4.0%* Ca :(1−0005〜(
1,0100%B :α0005〜0.010%および
希土類元素:0.0005〜Q、40ONを1種以上含
有せしめ残部が実質的にF・からなる合金工具鋼におい
てAC3以上の温度でオーステナイト化し九〇ち、焼入
をし、しかるのちSOO℃以下の温度で低温焼もどしを
行い未変態オーステナイトが体積率で5%以上残留して
いることを特徴とする熱間工具鋼。
Mo: Q, 10~'1.0% as the basic alloy component,
Cr:2,. 6 to 7.0%, Ni: i, otζe~&O and one or more types of K, V: Q, Q1-
3. ON, W: Oao 1-7. ON, Ti:
o, o o 1-0.5%, z r: o, o
Contains one or more of ox~o, s%, Nh:o, 001~115%, and further includes Cw:3LO'XKF, Co:
Q, 05~4.0%* Ca: (1-0005~(
1,0100%B: α0005~0.010% and rare earth elements: 0.0005~Q, 40ON is contained in an alloy tool steel containing one or more types, and the balance is substantially F. It is austenitized at a temperature of AC3 or higher. A hot work tool steel characterized by being quenched and then low-temperature tempered at a temperature below SOO°C so that 5% or more of untransformed austenite remains in terms of volume percentage.

(3)  C:0.1 e−OJ OX、 B l :
 jLOX以:’F、 M+a : 1Ofi。
(3) C: 0.1 e-OJ OX, B l:
jLOX: 'F, M+a: 1Ofi.

M ts : Q、i 0〜?、OXを基本合金成分と
し、Cr:16〜7.ON、 N i : 1.Otご
L−N0%を1種以上を含有し、さらK V: &@ 
1〜龜0%、 W: Q、01〜7.0%、 Tin0
01〜Q、5X、 Zr:(LOO1〜O,5%、Nh
:0.001〜0.5X (D 1種以上と8:0.0
3〜0.40X。
Mts: Q, i 0~? , OX as the basic alloy component, Cr: 16-7. ON, N i: 1. Contains one or more types of L-N0% and further K V: &@
1~0%, W: Q, 01~7.0%, Tin0
01~Q, 5X, Zr: (LOO1~O, 5%, Nh
:0.001~0.5X (D 1 or more types and 8:0.0
3-0.40X.

Be : (Lot〜0.40X、 T@ : Q、0
1〜o、40X、 B i :0.02〜Q、40X、
 P b : Q、03〜(L40%の1種以上を含有
せしめ残部が実箪的KF・からなる合金工具鋼において
AC3以上の温度でオーステナイト化し九のち焼入をし
、しかるのちSOO゛℃以下の温度で低温焼もどしを行
い、未変態オーステナイトが体積率で5%以上残留して
いることを特徴とする熱間工具鋼。
Be: (Lot~0.40X, T@: Q, 0
1~o, 40X, B i :0.02~Q, 40X,
P b : Q, 03 ~ (In an alloy tool steel containing one or more types of L40% and the remainder being actual KF, it is austenitized at a temperature of AC3 or higher, then quenched, and then SOO°C or lower. A hot work tool steel characterized by being tempered at a low temperature at a temperature of 5% or more by volume of untransformed austenite.

(4)  c:o、xoNa、oX、5iloXJXF
、Mu:zo%以LM o ’、 0.10〜7.0%
を基本合金成分とし、Cr:26〜7.ON、Ni:L
Oをこえ〜10%を1種以上ならびにV:(LOI〜a
、oX、 W: a、o 1〜7.0%、’rBO,0
01〜0.5X、 Zr:Q、1)OX 〜0.5X、
 Nb:(LOGI〜0.5%の1種以上と8 : &
03〜(L40%、 S @ :0.01〜0.40%
、T・:0.01〜0.40X、Bi:Q、02〜G、
40%。
(4) c:o, xoNa, oX, 5iloXJXF
, Mu:zo% or less LM o', 0.10-7.0%
are the basic alloy components, Cr: 26-7. ON, Ni:L
One or more types of O~10% and V: (LOI~a
, oX, W: a, o 1-7.0%,'rBO,0
01~0.5X, Zr:Q, 1)OX~0.5X,
Nb: (LOGI ~ 0.5% of one or more types and 8: &
03~(L40%, S@:0.01~0.40%
, T.:0.01~0.40X, Bi:Q, 02~G,
40%.

PI):0.03〜0−40Xの1種以上を含有し、さ
らにCu:3LO%打−Co : Q−05〜4.0 
X、 Ca :0.0005〜0.0100X、 B:
Q、GOO5〜o、oioxおよび希土類元素:Q、G
O05〜Q、400Xを1種以上含有せしめ残部が実質
的にF・からなる合金工具鋼においてAC3以上の温度
でオーステナイト化したのち焼入をし、しかるのちSO
O℃以下の温度で低温焼もどしを行−未変態オーステナ
イトが体積率で5%以上残留していることを特徴とする
熱間工具鋼。
PI): 0.03 to 0-40X, further containing Cu: 3LO% Co: Q-05 to 4.0
X, Ca: 0.0005-0.0100X, B:
Q, GOO5~o, oiox and rare earth elements: Q, G
An alloy tool steel containing one or more of O05~Q, 400X and the remainder being substantially F is austenitized at a temperature of AC3 or higher, then quenched, and then SO
A hot work tool steel characterized in that it is subjected to low-temperature tempering at a temperature of 0° C. or lower and that untransformed austenite remains in an amount of 5% or more by volume.

である。It is.

なお、本発明に記載する希土類元素とdY。Note that the rare earth elements and dY described in the present invention.

La、 C・、Ndおよびその他の希土類元素を示すも
のとする。
Indicates La, C., Nd and other rare earth elements.

本願発明は前述し丸ごとく、最近の熱間工具鋼に対する
要求特性の苛酷化に対処して合金設計され丸ものでTo
)、その特徴とするところは上述し九成分組成の合金を
焼入する際にそO焼入条件を調整して、例えばSSO℃
→150℃間を徐冷焼入後see℃以下の低温焼戻をし
て5%以上のオーステナイトを残留せしめ、それによっ
て靭性を付与すると同時に高温でのクリープラブチャー
特性を著しく向上させ、靭性と耐摩耗性という相反する
特性をともに改善した画期的&熱間工具鋼である。
As described above, the present invention is an alloy designed in response to the recent increasingly severe requirements for hot work tool steel.
) is characterized by adjusting the quenching conditions when quenching an alloy with a nine-component composition, such as SSO℃.
→After slow cooling and quenching between 150℃ and low temperature tempering below 5℃, more than 5% of austenite remains, which imparts toughness and at the same time significantly improves the creep-lubriture properties at high temperatures. This is an innovative and hot work tool steel that has improved wear resistance, which is a contradictory property.

さらにまた本願発明鋼は前記組成範囲内で成分パツンス
を適宜選定することKよシ焼入れ後SOO℃以下の焼も
どし状11における硬さを調整することができ、その硬
さに応じ、てプレハードン鋼として4、あるいは調質鋼
として4使用できる。すなわち、上記硬さがHHC≦4
5の場合にはプレハードン鋼として使用でき、HRC>
45の場合には調質鋼として使用できる。後者の場合は
、特に長寿命を要求されるときに好適である。最近の金
型加工技術の進歩によりて、後者の場合でもプレハード
ン鋼として使われるケースが多くなりてきた。
Furthermore, the hardness of the steel according to the present invention in the tempered state 11 below SOO℃ after hardening can be adjusted by appropriately selecting the component strength within the above composition range, and depending on the hardness, it is possible to adjust the hardness of the pre-hardened steel. 4 or as tempered steel. That is, the above hardness is HHC≦4
5, it can be used as pre-hardened steel and HRC>
45, it can be used as tempered steel. The latter case is particularly suitable when long life is required. Due to recent advances in mold processing technology, the latter is increasingly being used as pre-hardened steel.

本願発明鋼は靭性と耐摩耗性を兼備したものであ〕、そ
の被剛性は一般に悪い。そこでS、S・、Toなどの快
削元素を用途に応じて適量添加し、その被剛性を改善す
るととは実用上非常に有益である。
The steel of the present invention has both toughness and wear resistance], but its stiffness is generally poor. Therefore, it is very useful in practice to add suitable amounts of free-cutting elements such as S, S., and To to improve the rigidity depending on the application.

次に本願発明鋼の成分組成範囲の限定理由を以下にのぺ
る。
Next, the reason for limiting the composition range of the steel of the present invention will be described below.

C:0.1O−OJ OX 熱間工具鋼の強度を向上させ、耐摩耗性を付与する元素
であシ、熱間工具鋼として必要な強度、特に高温でのク
リニブラグチャー強度と耐摩耗性を確保するためには0
.10%以上含有する必要がある。C量の増加とともに
強度は増加し、耐摩耗性の向上が図られるが、それとと
−に靭性が劣化するためQ、4ioX以下に限定し丸。
C: 0.1O-OJ OX An element that improves the strength of hot work tool steel and imparts wear resistance. Strength necessary for hot work tool steel, especially clini-bragure strength and wear resistance at high temperatures. 0 to ensure
.. It is necessary to contain 10% or more. As the amount of C increases, the strength increases and wear resistance is improved, but at the same time, the toughness deteriorates, so Q is limited to 4ioX or less.

s s : to驕J 溶製・時の脱酸効果のはか、基地0強化、耐酸化性の向
上に有効な元素であル、積極的に含有することが望まし
い。ただし、多量に含有すると地キズが多くなると同時
に被剛性。
ss: to 驕J It is an element that is effective in increasing the deoxidizing effect during melting, reinforcing base 0, and improving oxidation resistance, and it is desirable to actively include it. However, if it is contained in a large amount, it will cause more scratches on the ground and at the same time it will become stiffer.

靭性、耐ヒートチェック性が低下すゐ九め10%以下に
限定した。
The decrease in toughness and heat check resistance was limited to 10% or less.

M 1141103^σ 溶製時の脱酸、脱硫効果の#1か焼入性確保のために有
効な元素であ〕積極的に含有することが望ましい。ただ
し多量に含有すると被剛性が低下するので20X以下に
限定した。
M 1141103^σ It is an effective element for #1 deoxidizing and desulfurizing effects during melting and for ensuring hardenability] It is desirable to actively include it. However, if it is contained in a large amount, the stiffness will decrease, so it is limited to 20X or less.

M・:Q、10〜7.0% M・はベイナイト変態を促進し、本願発明鋼の特徴であ
る安m’−h残留オーステナイトを生成させる元素であ
ると同時KM@2C炭化物の析出によりて高温でのクリ
ープラブチャー特性を高めるのに有効な元素である。安
定な残留オーステナイトの生成ならびに熱間工具鋼とし
て必要なりリープツブチャー特性を確保するために少な
くとも0.1 ON含有しなければならない。ただし、
多量に含有すると靭性。
M: Q, 10 to 7.0% M is an element that promotes bainite transformation and produces ammonium m'-h retained austenite, which is a characteristic of the steel of the present invention, and at the same time, by precipitation of KM@2C carbides. It is an effective element for enhancing creep love characteristics at high temperatures. At least 0.1 ON must be contained in order to form stable retained austenite and ensure the leap-bunching properties necessary for hot work tool steel. however,
If it is contained in a large amount, it becomes tough.

被剛性が大巾に低下するので7LOX以下に限定した。Since the stiffness is greatly reduced, it is limited to 7LOX or less.

Cr : 2−6〜7.0’)g  N l : 1.
0をこえ〜!LOXNi、 Crは本願発明鋼の特徴で
ある安定な残留オーステナイトを生成させる元素で、い
ずれかが含有されていな叶ればならな−。
Cr: 2-6 to 7.0')gNl: 1.
Beyond 0! LOXNi and Cr are elements that generate stable retained austenite, which is a feature of the steel of the present invention, and it is necessary that either one of them be contained.

焼戻後5%以上の残留オーステナイトを生成させるには
各々0.30%以上含有していなければならないが、衝
撃試験における還移温度を室温以下になるようにし、金
型の予熱がなくても大ワレが生じないようにするため、
Cr。
In order to generate 5% or more retained austenite after tempering, each must contain 0.30% or more, but the reduction temperature in the impact test should be kept below room temperature, and even without preheating the mold. To prevent large cracks from occurring,
Cr.

Ni含有量の下限は各々L11X、 LO,%をとえ、
と限定した。Cr、Niの含有量が多くなるとともに安
定な残留オーステナイトが増加し、その分解によって高
温でのクリープラブチャー特性も向上し高温での耐摩耗
性が向上するが多量に含有するとクリープラブチャー特
性は逆に低下するのでCr、Niの上隈紘それぞれ7.
0%、五〇X’に限定した。
The lower limit of Ni content is L11X, LO,%, respectively.
limited to. As the content of Cr and Ni increases, stable retained austenite increases, and its decomposition improves creep-loveture properties at high temperatures and wear resistance at high temperatures. On the contrary, it decreases, so Hiro Kamikuma for Cr and Ni is 7.
0%, limited to 50X'.

V: 0.01〜3LOX W: Q、01〜7.ON
v、wH熱間工具鋼として必要な高温でのクリープラブ
チャー特性の向上には有効な元素であ)、それぞれ(L
@IX以上の含有が望ましい。ただし多量に含有すると
安定な未溶解炭化物が増加し、靭性、被削性、耐ヒート
チェック性が著しく低下するOでVは10%以下。
V: 0.01~3LOX W: Q, 01~7. ON
v, wH are effective elements for improving the creep rupture properties at high temperatures necessary for hot work tool steel), respectively (L
It is desirable to contain @IX or more. However, if it is contained in a large amount, stable undissolved carbides will increase, and toughness, machinability, and heat check resistance will significantly decrease.O and V are less than 10%.

Wは7.0%以下に限定し大。W is limited to 7.0% or less.

Ti:0.0(II〜0.5X、  Zr:0.001
〜0.5%、 Nb:0.001〜G、5X TI、Zr、Nbaいずれも強力な炭化物形成元素であ
ル、微量の含有で高温でのクリープラブチャー特性を高
め、耐摩耗性を向上させるのに有効な元素であル、少な
くとも0.001%含有することが望ましい。ただし多
量に含有すると未溶解炭化物が多くな)、靭性に悪影響
をおよぼすのでO,S%以下に限定しえ。
Ti: 0.0 (II ~ 0.5X, Zr: 0.001
~0.5%, Nb: 0.001~G, 5X TI, Zr, and Nba are all strong carbide-forming elements, and their presence in trace amounts enhances the creep-rubber properties at high temperatures and improves wear resistance. It is an element effective for increasing the carbon content, and it is desirable that the content be at least 0.001%. However, if it is contained in a large amount, there will be a large amount of undissolved carbides), which will have an adverse effect on toughness, so it should be limited to less than O and S%.

Cu:!LOX1fF Cw紘剥離しにくい表面スケールを生成させて高温での
クリープツブチャー特性を高める元素であ〕、目的に応
じて適量含有することが望ましい。しかし多量に含有す
ると靭性が低下するので10%以下に限定した。
Cu:! LOX1fF (Cw) This is an element that generates surface scale that is difficult to peel off and improves creep bubble characteristics at high temperatures, and is preferably contained in an appropriate amount depending on the purpose. However, since the toughness decreases if it is contained in a large amount, it is limited to 10% or less.

C* : 0.05〜4− OX   coは残留オー
ステナイトの安定化に有効な元素であシ、また高温にお
ける炭化物の凝集を抑制し高温でのクリープラブチャー
特性を高める元素であJ)、0.05X以上の含有が望
ましい。ただし多量に含有すると耐ヒートチェ、り性を
劣化し金型の大ワレを促進するので10%以下に限定し
た。
C*: 0.05~4-OX co is an element effective in stabilizing retained austenite, and is an element that suppresses agglomeration of carbides at high temperatures and enhances creep-loveture properties at high temperatures.J), 0 A content of .05X or more is desirable. However, if it is contained in a large amount, it deteriorates the heat resistance and peeling properties and promotes severe cracking of the mold, so it is limited to 10% or less.

B:9.0005〜0.010X Bは焼入性向上に有効な元素であ〕、特に大型#には積
極的に含有すゐのが望まし10焼入性向上には少なくと
もQ、0Ot05X含有゛する必要があるが、多量に含
有すると靭性9酎ヒートチェ、り性が低下するのでQ、
010%以下に限定しえ。
B: 9.0005~0.010X B is an effective element for improving hardenability], and it is desirable to actively include it especially in large #10. However, if it is contained in a large amount, the toughness will decrease, so Q.
Limit it to 0.10% or less.

Ca:0.0005〜0.0100%、希土類元素:(
LOG05〜04−Go%上記元素社耐酸化性を高め、
剥離しに(いスケールを生成させ高温でのクリープラブ
チャー特性を向上させるのには有効な元素であ)、目的
に応じて適量含有することが望まし−が、必要以上に含
有すると靭性、耐ヒートチェック性が低下するのでCa
はQJOO&−4,0100%、希土類元素の各々は0
−0005〜(LOOXの範囲が望ましい。
Ca: 0.0005-0.0100%, rare earth elements: (
LOG05~04-Go% improves the oxidation resistance of the above elements,
It is an effective element for peeling (generating scales and improving creep-lubrication properties at high temperatures), and it is desirable to contain it in an appropriate amount depending on the purpose, but if it is contained in an amount more than necessary, it may cause problems with toughness and Since heat check resistance decreases, Ca
is QJOO&-4,0100%, each of the rare earth elements is 0
-0005~(LOOX range is desirable.

〔実施例〕〔Example〕

第1表に示すごとき成分組成の本願発明鋼および従来か
ら用いられて−る熱間工具鋼を溶製し、そ041性を調
査し九。表お、A1−16は本願発明鋼であ11.41
1〜19は比較のため溶製したJI88ICDIil、
 OjC−3Nl−3M・、ムIIIHIOKそれぞれ
相当すij・鋼である。
Steels of the present invention and conventionally used hot work tool steels having the compositions shown in Table 1 were melted and their 041 properties were investigated. In Table O, A1-16 is the invention steel of the present application and is 11.41
1 to 19 are JI88ICDIil prepared for comparison,
OjC-3Nl-3M and MuIIIHIOK are corresponding steels, respectively.

第  1 表 第1図に第1表に示す供試材のうち本願発明鋼であるム
1〜Sについて高1でのクリープラブチャー特性に訃よ
ぼす残留オーステナイト量の影響を調査した結果を示し
た。クリープツブチャー特性は試験温度が650℃、応
力が!014f/jという条件で試験を行い、その時の
ラブチャ一時間で評価したが、そ0表示社低温焼もどし
く400℃)材と同じ硬さに高温部もどしくSOO〜6
30℃の適温を選定して低温焼戻材と同一か丸さに調整
)で調質した同一供試材のラブチャ一時間を1とし、そ
の対比で行った。       ゛・ 各供試材の焼入温度を第2表に示す。
Table 1 Figure 1 shows the results of an investigation into the influence of the amount of retained austenite on the creep rupture properties at height 1 for Mu1 to S, which are the steels of the present invention among the test materials shown in Table 1. Ta. For creep bubble characteristics, the test temperature is 650℃ and the stress is! The test was conducted under the conditions of 014f/j and evaluated in one hour at that time.
The same test material was tempered at an appropriate temperature of 30°C and adjusted to the same roundness as the low-temperature tempered material.゛・ The quenching temperature of each sample material is shown in Table 2.

蛸で) 第21! 残留オーステナイト量の調整は5soc→15G℃間の
冷却速度を適宜変化させて行り九。
With octopus) 21st! The amount of retained austenite was adjusted by appropriately changing the cooling rate from 5 soc to 15 G°C.

(尚、高温焼戻材の残留オーステナイト量はほぼ0%で
ある。) 本願発明鋼は残留オーステナイトが5X以上になるとク
リープラブチャー特性は急激に良くなっている。この調
査結果から本願発明鋼において十分なりリープツブチャ
ー特性を得るためには、残留オーステナイトは体積率で
5X以上としなければならなiことがわかる。
(The amount of retained austenite in the high-temperature tempered material is approximately 0%.) In the steel of the present invention, when the retained austenite becomes 5X or more, the creep-rupture properties improve rapidly. From the results of this investigation, it can be seen that in order to obtain sufficient leap-bunching properties in the steel of the present invention, the retained austenite must have a volume fraction of 5X or more.

第3表は第1表に示す供試材について熱間工具鋼として
の特性を確認する九め鍛造によシ15 oHIIplx
 400−さのプレツクを成形しその靭性(鍛、伸方向
の衝撃値で評価)、クリープラブチャ一時間(試験条件
: asoc、 2゜Kgf/aJ )ならびに被削性
を示した。なお、各供試材の焼入れは本願発明鋼である
JtL1〜16は55M150℃間を7°C/1m1l
I以下の冷却速度で適宜冷却し徐冷焼入れを行ったが比
較鋼である417〜19は油焼入れとじ九。被剛性は超
硬工具(100種)による長手旋削を行い、切削速度が
sowhZ−の時の切削時間で評価し、第3表では41
7対比で表示した。
Table 3 shows the characteristics of the test materials shown in Table 1 as hot work tool steels.
A 400-thick slab was formed to demonstrate its toughness (evaluated by impact value in the forging and elongation directions), creep roughness for 1 hour (test conditions: asoc, 2°Kgf/aJ), and machinability. In addition, the quenching of each test material was performed at 7°C/1ml for JtL1 to 16, which are the steels of the present invention, at 55M and 150°C.
Although the comparative steels 417 to 19 were appropriately cooled and slowly quenched at a cooling rate below I, they were oil quenched. Rigidity was evaluated by longitudinal turning with a carbide tool (100 types) and the cutting time when the cutting speed was sowhZ-, and in Table 3, 41
Displayed in 7 comparisons.

第3表 第3表に示すように本願発明鋼であるA1〜16は比較
鋼のJIi17〜19に比べてラブチャ一時間、靭性が
著しくすぐれていた。q#Kss〜10は41〜5と比
較してラブチャ一時間が 未相当長くなってiるが、こ
れはCm、C・、CaなどKよる効果である。ム1−1
0の被剛性はかなシ悪かりたがA11〜16に示すよう
に、快削元素添加による被剛性向上は顕著でありた。
Table 3 As shown in Table 3, the invention steels A1-16 had significantly better toughness than the comparative steels JIi17-19. q#Kss~10 has a significantly longer labcha time than 41~5, but this is due to the effect of K such as Cm, C・, and Ca. Mu 1-1
Although the stiffness of No. 0 was poor, as shown in A11 to A16, the stiffness was significantly improved by adding the free-cutting element.

以上の実施例に与られるごとく本願発明の熱間工具鋼は
高温で、のすぐれ九クリープ2プチャー特性と靭性を普
備しておシ最近の苛酷な条件のもとで使われ、しかも高
寿命が要求される熱間工具鋼としてきわめて好適な鋼で
ある。
As shown in the above embodiments, the hot work tool steel of the present invention has excellent creep and tear properties and toughness at high temperatures, and can be used under today's harsh conditions and has a long service life. This steel is extremely suitable as a hot work tool steel that requires

なお、本願発明鋼Kをいて体積率で5X以上の安定な残
留オーステナイトを得る方法としては、前述のよ゛うに
SSO→15G℃間を徐冷して焼入れる方法を適用し論
述してき九が、との他に安定な残留オーステナイトを得
る方法としてMs±150℃の温度で恒温保持する方法
を用−てもよい。後者による方法で供試材を調整し調査
しえ結果は徐冷焼入れkよる場合と同様であり九。
In addition, as a method for obtaining stable retained austenite with a volume fraction of 5X or more using the steel K of the present invention, a method of slow cooling and quenching from SSO to 15 G°C was applied and discussed, as described above. In addition to this, a method of constant temperature maintenance at a temperature of Ms±150° C. may be used as a method of obtaining stable retained austenite. The latter method can be used to prepare and investigate the test material, and the results are the same as those obtained by slow cooling and quenching.

第1図は本願発明鋼の高温で゛のクリープツブチャー特
性にシよばす残留オーステナイト   量の影響を示す
グラフである。
FIG. 1 is a graph showing the influence of the amount of retained austenite on the creep bubble characteristics of the steel according to the present invention at high temperatures.

出願人  大同特殊鋼株式全社 !“。−1 代理人 、゛ 第1図 − 残留オーステナイト量(チ) 手続補正書 昭和57年2月S日 特許庁  島田春樹  殿 λ 発明の名称 熱間工具鋼 & 補正をする者 事件との関係   出願人 代表者 シ晶iり 4、代理人〒105 5、補正命令の日付 昭和  年  月  日 4 補正により増加する発−〇数 8、補正の内容 (1)願書の表題に次の事項を追加する。Applicant: Daido Steel Co., Ltd. ! “.-1 agent ,゛ Figure 1 − Amount of retained austenite (chi) Procedural amendment February S, 1982 Haruki Shimada, Patent Office λ Name of invention hot work tool steel & person making corrections Relationship to the case: Applicant Representative: Iri Shiaki 4. Agent 〒105 5. Date of amendment order Showa year month day 4 Number of shots increased by correction 8. Contents of amendment (1) Add the following items to the title of the application.

「(特許法第38条ただし書の規定による特許出願)」 (2)願書の1項の次に下記を追加する。“(Patent application pursuant to the proviso to Article 38 of the Patent Act)” (2) Add the following after paragraph 1 of the application.

1、特許請求の範囲に記載された発明の数 4」(3)
明細書の特許請求の範囲の欄を別紙のとおりに訂正する
。  、 (4)  明細書の発明の詳細な説明の欄を次のとおシ
訂正する。
1. Number of inventions stated in the claims 4” (3)
The claims section of the specification is corrected as shown in the attached sheet. (4) The detailed description of the invention column in the specification should be corrected as follows.

イ 第7頁下から第7行目および第9頁、第3行目の「
6.0%」を「0.6%」とする。
B. The 7th line from the bottom of the 7th page and the 3rd line of the 9th page.
6.0%” is changed to “0.6%”.

口 第16頁第9行目ro、oo%」をro、400%
」とする。
Mouth Page 16, line 9 ro, oo%” ro, 400%
”.

以上 別紙 特許請求の範囲 (1)  C: 0.10〜0.60%、 Sl:2.
0%以下2Mn:2.0%以下。
Above appended claims (1) C: 0.10 to 0.60%, Sl: 2.
0% or less 2Mn: 2.0% or less.

Mo : 0.10〜7.0%を基本合金成分とし、C
r : 2−6〜7.0%、Ni:1.0をこえ〜5.
0%を1種以上を含有し、さらにV : 0.01〜a
、o%、 w: 0.01〜7.0%、 T i : 
0.001〜0.5%、 Z r : 0.001〜0
.5%、 Nb : 0.001〜0.5%の1種以上
を含有せしめ残部が実質的にFeからなる合金工具鋼に
おいてAC3以上の温度でオーステナイト化したのち焼
入をし、しかるのち500℃以下の温度で低温焼もどし
を行い、未変態オーステナイトが体積率で5%以上残留
していることを特徴とする熱間工具鋼。
Mo: 0.10-7.0% as a basic alloy component, C
r: 2-6 to 7.0%, Ni: over 1.0 to 5.
Contains one or more types of 0%, and further V: 0.01 to a
, o%, w: 0.01-7.0%, T i :
0.001-0.5%, Zr: 0.001-0
.. 5%, Nb: 0.001 to 0.5% of one or more kinds of alloy tool steel containing at least one kind, the remainder of which is essentially Fe, is austenitized at a temperature of AC3 or higher, then quenched, and then quenched at 500°C. A hot work tool steel characterized in that it is low-temperature tempered at the following temperature and that 5% or more of untransformed austenite remains in volume percentage.

(2)   C++’0.10〜0.6X、 S i 
: 2.0%以下、 Mn : 2.0%以下。
(2) C++'0.10~0.6X, Si
: 2.0% or less, Mn: 2.0% or less.

Mo : 0.10〜7.0%を基本合金成分とし、c
r:2.6〜7.0%m N1 : 1.0をこえ〜5
.θ%を1種以上ならびにV:0.01〜3.0%、 
W: 0.01〜7.0%、Ti:o、oo1〜0.5
%。
Mo: 0.10 to 7.0% as a basic alloy component, c
r: 2.6-7.0%m N1: Over 1.0-5
.. One or more types of θ% and V: 0.01 to 3.0%,
W: 0.01-7.0%, Ti: o, oo1-0.5
%.

Z r : 0.001〜0.5%、 Nb : o、
o O1〜0.5%の1種以上を含有し、さらにCu:
3.0%以下、 Co : 0.05〜4.0%。
Zr: 0.001-0.5%, Nb: o,
o Contains one or more of 1 to 0.5% O, and further Cu:
3.0% or less, Co: 0.05-4.0%.

Ca:0.0005〜0.0100%、B:0.000
5〜0.010%および希土類元素:0.0005〜0
.400%を1種以上を含有せしめ残部が実質的にFe
からなる合金工具鋼においてAC3以上の温度でオース
テナイト化したのち、550℃から150℃の温度で低
温焼もどしを行い未変態オーステナイトが体積率で5%
以上残留していることを特徴とする熱間工具鋼。
Ca: 0.0005-0.0100%, B: 0.000
5-0.010% and rare earth elements: 0.0005-0
.. 400% contains one or more kinds, and the remainder is substantially Fe.
After austenitizing the alloy tool steel at a temperature of AC3 or higher, low-temperature tempering is performed at a temperature of 550°C to 150°C to achieve a volume fraction of untransformed austenite of 5%.
A hot work tool steel characterized by having a residual amount of at least 10%.

(3)   C: 0.10〜0.60%、st:z、
o%以下、Mn:2゜0%以下。
(3) C: 0.10-0.60%, st:z,
0% or less, Mn: 2°0% or less.

M o : 0.10〜7.0%を基本合金成分とし、
Cr:2.6〜7.0%、Nl:1、Oをこえ〜5.θ
%を1種以上とS : 0.03〜0.40%、 S 
e : 0.01〜0.40%、 T e : 0.0
1〜0.40%、Bi:0.02〜0.’40%、pb
:o、oa〜0.40%の1種以上を含有し、さらにV
 : 0.01〜3.0%、 W: 0.0 t 〜7
.0%、Ti :0.001〜0.5%、zr:0.0
01〜0.5%、 Nb : o、o o 1〜0.5
%の1種以上を含有せしめ、残部が実質的にFeからな
る合金工具鋼においてAC3以上の温度でオーステナイ
ト化したのち焼入をし、しかるのち500℃以下の温度
で低温焼もどしを行い、未変態オーステナイトが体積率
で5%以上残留して■ いることを特徴とする熱間工具鋼。
Mo: 0.10 to 7.0% as the basic alloy component,
Cr: 2.6-7.0%, Nl: 1, over O5. θ
% of one or more types and S: 0.03-0.40%, S
e: 0.01-0.40%, Te: 0.0
1-0.40%, Bi: 0.02-0. '40%, pb
: o, oa ~ 0.40%, and further contains V
: 0.01~3.0%, W: 0.0t~7
.. 0%, Ti: 0.001-0.5%, zr: 0.0
01-0.5%, Nb: o, o o 1-0.5
% or more, the remainder being substantially Fe, is austenitized at a temperature of AC3 or higher, then quenched, and then low-temperature tempered at a temperature of 500°C or lower to obtain an untreated steel. A hot work tool steel characterized by a residual volume fraction of transformed austenite of 5% or more.

(4)   C: 0.10〜0.6%、St:2.0
%以下、 Mn : 2.0%以下。
(4) C: 0.10-0.6%, St: 2.0
% or less, Mn: 2.0% or less.

M o : 0.10〜7.0%を基本合金成分とし、
Cr : 2.6−7.0%、Ni:1.0をこえ〜5
.0%を1種以上ならびに、V : 0.01〜3.0
%、w:0.01〜7.0%、 T t : o、o 
o 1〜0.5%。
Mo: 0.10 to 7.0% as the basic alloy component,
Cr: 2.6-7.0%, Ni: over 1.0~5
.. One or more types of 0% and V: 0.01 to 3.0
%, w: 0.01-7.0%, Tt: o, o
o 1-0.5%.

Z r : 0.001〜0.5%、 Nb : o、
o 01〜0.5%の1種以上を含有し、さらにCu 
: 3−0%以下、Co:0.05〜4.0%。
Zr: 0.001-0.5%, Nb: o,
o Contains one or more of 01 to 0.5%, and further contains Cu
: 3-0% or less, Co: 0.05-4.0%.

Ca:0.0005〜0.0100%、B:0.000
5〜0.010%および希土類元素:0.0005〜0
.400%を1種以上と、S: 0.03〜0.40%
、 S e : 0.01〜0.40%、 Te : 
0.01〜0.40%、Bi:0.02〜0.40%、
 p b : o、o 、a 〜0.40%の1種以上
を含有せしめ、残部が実質的にFeからなる合金工具鋼
においてAC3以上の温度でオーステナイト化したのち
、550℃から15012の温度で低温焼もどしを行い
未変態オーステナイトが体積率で5%以上残留している
ことを特徴とする熱間工具鋼。
Ca: 0.0005-0.0100%, B: 0.000
5-0.010% and rare earth elements: 0.0005-0
.. 400% with one or more types, S: 0.03-0.40%
, Se: 0.01-0.40%, Te:
0.01-0.40%, Bi: 0.02-0.40%,
p b : An alloy tool steel containing one or more of o, o, a ~0.40% and the remainder substantially consisting of Fe is austenitized at a temperature of AC3 or higher, and then austenitized at a temperature of 550°C to 15012°C. A hot work tool steel characterized by being tempered at a low temperature and having a volume percentage of 5% or more of untransformed austenite remaining.

1111

Claims (1)

【特許請求の範囲】 (1)  C:0.10〜0JOX、S!=2.O矯任
1M飄:20%ヅLM o :0.10〜7.0 %を
基本合金成分とし、Cr:16〜7.0X、 N i 
: 1.0をこえ〜&0%t1種以上を含有し、さらK
 V: 0.01 N3.ON、 W: 0.01〜7
.0%、 T 1: o、o o 1〜o、s%、 Z
 r : 0.001〜0.5%、Nb::O,OO1
〜0.5Xの1種以上を含有せしめ残部が実質的にFI
からなる合□金二具鋼において (:AC3以上の温度
でオーステナイト化したのち焼入をし、しかるのち5G
G℃以下の温度で低温焼もどしを行い、未変態オーステ
ナイトが体積率で5X以上残留していることを特徴とす
る熱間工具鋼。 (2)  C:0.10〜6.ON、 S l : I
OX荻Fs M a :2−0%肝。 M o :0.10〜7.O%を基本合金成分とし、C
r:2.6〜7.ON、 N i : 1.0〜S、o
%を1種以上ならびにV : 0.01〜3.0%、 
W: 0.01〜7.0%、 T i : O,001
〜0.5’ 0.001〜o、s%、Nb:o、oot
〜05Xの1種以上を含有し、さらにCw : 3LO
%ヅF@ Co : 0.05〜4.0%、 Ca:0
.0005〜8.0100%、B:0.0O05〜0.
01ONおよび希土−元素:Q、0005〜0.40O
Nを1種以上を含有せしめ残部が実質的にF・からなる
合金工具鋼においてAC3以上の温□度でオーステナイ
ト化4したのち、550℃から150℃の温度で低温焼
もどしを行い未変態オーステナイトが体積雫で5%以上
残留しているヒとを特徴とする熱間工具鋼。 3)  C: Q、10〜0.60%* S i : 
2−OXjO@ Mm : LO%軒。 Mo :0.10〜7.OXを基本合金成分とし、Cr
:16〜7.ON、 N t :、1.0をこえ〜&O
%を1種、以上とs:o、oa〜(L40%、S・、0
.01〜0.40%、T@:0.01〜0.40%、旧
:Q、02〜0.40%、pb、o。 の1種以上を含有し、さらにV: 0.01〜3.0%
。 @0.001NO,5%、Zr:O,GO1〜o−s%
、N11:0.001〜o5.’s%の1種以上を含有
せしめ残部が実質的にF・からなる合金工具鋼において
AC3以上の温度でオーステナイト化したのち焼入をし
、しかるのち5oot以下の温度で低温部もどしを行い
、未変態オーステナイトが体積率で5%以上残留してi
ることを特徴とする熱間工具鋼。 (4)  C: 0.10〜a、OX、 81 : 2
.0’JDJ7. Km : LO驕σ。 M @ e Q、10〜7.OXを基本合金成分とし、
cr:2.6〜7.OX、 N i : 1.0−40
Xを1種以上ならびに、V: Q、01〜3LOX、 
W: 0.01〜7.0%、rBioox〜Q、5X、
 Zr:Q、001〜QJX、 Nb:Q、001〜Q
、55%の1種以上を含有し、さらKCw:3.O%j
5゜Co : Q、05〜4.OX、 Ca: Q、0
05〜0.0100%、 B:Q、0005〜(LO1
0Xおよび希土類元素:0.0005〜0.400X 
t ill Jjj上ト、s:o、oa〜0.4ON。 8@ : 0.01〜0.40X、 T@ : 0.0
1〜0.40X、 B i :0.02〜0.40X、
 P b : (LO3〜(L40XO1種以上を含有
せしめ残部が実質的KFeからなる合金工具鋼において
AC3以上の温度でオーステナイト化したのち、5so
cか%150Cの温度で低温部もどしを行い未変態オー
ステナイトが体積率で5%以上残留していることを特徴
[Claims] (1) C: 0.10-0JOX, S! =2. The basic alloy components are 0.10% to 7.0%, Cr: 16 to 7.0X, Ni
: More than 1.0~&0% Contains one or more types of T, Sara K
V: 0.01 N3. ON, W: 0.01~7
.. 0%, T 1: o, o o 1~o, s%, Z
r: 0.001-0.5%, Nb::O, OO1
~0.5X, and the remainder is substantially FI
In the alloy □ Nigu steel (: austenitized at a temperature of AC3 or higher, then quenched, then
A hot work tool steel characterized in that it is low-temperature tempered at a temperature of G°C or lower and that untransformed austenite remains in a volume fraction of 5X or more. (2) C: 0.10-6. ON, Sl: I
OXOgiFs M a :2-0% liver. Mo: 0.10-7. O% is the basic alloy component, C
r: 2.6-7. ON, Ni: 1.0~S, o
% or more and V: 0.01 to 3.0%,
W: 0.01-7.0%, Ti: O,001
~0.5' 0.001~o, s%, Nb:o, oot
Contains one or more of ~05X, and further has Cw: 3LO
%ヅF@Co: 0.05-4.0%, Ca: 0
.. 0005-8.0100%, B: 0.0O05-0.
01ON and rare earth-elements: Q, 0005-0.40O
An alloy tool steel containing one or more types of N and the remainder being substantially F is austenitized at a temperature of AC3 or higher, and then low-temperature tempered at a temperature of 550°C to 150°C to form untransformed austenite. A hot work tool steel characterized by a residual amount of 5% or more per volume drop. 3) C: Q, 10-0.60%* S i :
2-OXjO@Mm: LO% house. Mo: 0.10-7. OX is the basic alloy component, Cr
:16~7. ON, N t :, over 1.0 ~&O
% or more and s: o, oa ~ (L40%, S., 0
.. 01-0.40%, T@: 0.01-0.40%, old: Q, 02-0.40%, pb, o. Contains one or more of the following, and further contains V: 0.01 to 3.0%
. @0.001NO, 5%, Zr:O, GO1~os%
, N11:0.001-o5. An alloy tool steel containing at least one type of 's% and the remainder substantially consisting of F. is austenitized at a temperature of AC3 or higher, then quenched, and then subjected to low-temperature recovery at a temperature of 5oot or lower, 5% or more of untransformed austenite remains in terms of volume percentage i
A hot work tool steel characterized by: (4) C: 0.10~a, OX, 81:2
.. 0'JDJ7. Km: LO σ. M@e Q, 10-7. With OX as the basic alloy component,
cr: 2.6-7. OX, Ni: 1.0-40
One or more types of X and V: Q, 01 to 3LOX,
W: 0.01-7.0%, rBioox-Q, 5X,
Zr:Q, 001~QJX, Nb:Q, 001~Q
, 55% of one or more types, further KCw: 3. O%j
5°Co: Q, 05~4. OX, Ca: Q, 0
05~0.0100%, B:Q, 0005~(LO1
0X and rare earth elements: 0.0005-0.400X
t ill Jjj top, s:o, oa~0.4ON. 8@: 0.01~0.40X, T@: 0.0
1 to 0.40X, B i :0.02 to 0.40X,
P b : (LO3~(L40) After being austenitized at a temperature of AC3 or higher in an alloy tool steel containing one or more types of XO and the remainder being substantially KFe, 5so
It is characterized by the fact that the low-temperature part is restored at a temperature of 150C and more than 5% of untransformed austenite remains in terms of volume percentage.
JP503882A 1982-01-18 1982-01-18 Hot working tool steel Granted JPS58123861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP503882A JPS58123861A (en) 1982-01-18 1982-01-18 Hot working tool steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP503882A JPS58123861A (en) 1982-01-18 1982-01-18 Hot working tool steel

Publications (2)

Publication Number Publication Date
JPS58123861A true JPS58123861A (en) 1983-07-23
JPH0260748B2 JPH0260748B2 (en) 1990-12-18

Family

ID=11600272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP503882A Granted JPS58123861A (en) 1982-01-18 1982-01-18 Hot working tool steel

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Country Link
JP (1) JPS58123861A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207359A (en) * 1982-05-29 1983-12-02 Nachi Fujikoshi Corp Hot working tool steel
JPS6056055A (en) * 1983-09-08 1985-04-01 Daido Steel Co Ltd Hot working tool steel
JPS6059053A (en) * 1983-09-09 1985-04-05 Daido Steel Co Ltd Hot working tool steel
JPS6059052A (en) * 1983-09-09 1985-04-05 Daido Steel Co Ltd Hot working tool steel
US6024916A (en) * 1997-03-31 2000-02-15 Daido Tokushuko Kabushiki Kaisha Cast cold tool and method for producing the same
CN100357476C (en) * 2002-11-06 2007-12-26 大同特殊钢株式会社 Alloy tool steel and its producing method and mold using it
KR20200061638A (en) * 2018-11-26 2020-06-03 현대제철 주식회사 Manufacturing method for die steel for hot stamping and die steel for hot stamping thereof
WO2021130301A1 (en) * 2019-12-27 2021-07-01 Voestalpine Böhler Edelstahl Gmbh & Co. Kg Method for manufacturing a hot-work steel object

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5212772B2 (en) * 2006-09-15 2013-06-19 日立金属株式会社 Hot work tool steel with excellent toughness and high temperature strength
JP5212774B2 (en) * 2006-09-15 2013-06-19 日立金属株式会社 Hot tool steel excellent in toughness and high temperature strength and method for producing the same
EP2065483A4 (en) * 2006-09-15 2016-03-23 Hitachi Metals Ltd Hot-working tool steel having excellent stiffness and high-temperature strength and method for production thereof

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207359A (en) * 1982-05-29 1983-12-02 Nachi Fujikoshi Corp Hot working tool steel
JPS6056055A (en) * 1983-09-08 1985-04-01 Daido Steel Co Ltd Hot working tool steel
JPH0353383B2 (en) * 1983-09-08 1991-08-14 Daido Steel Co Ltd
JPS6059053A (en) * 1983-09-09 1985-04-05 Daido Steel Co Ltd Hot working tool steel
JPS6059052A (en) * 1983-09-09 1985-04-05 Daido Steel Co Ltd Hot working tool steel
JPH0353385B2 (en) * 1983-09-09 1991-08-14 Daido Steel Co Ltd
JPH0353384B2 (en) * 1983-09-09 1991-08-14 Daido Steel Co Ltd
US6024916A (en) * 1997-03-31 2000-02-15 Daido Tokushuko Kabushiki Kaisha Cast cold tool and method for producing the same
CN100357476C (en) * 2002-11-06 2007-12-26 大同特殊钢株式会社 Alloy tool steel and its producing method and mold using it
KR20200061638A (en) * 2018-11-26 2020-06-03 현대제철 주식회사 Manufacturing method for die steel for hot stamping and die steel for hot stamping thereof
WO2021130301A1 (en) * 2019-12-27 2021-07-01 Voestalpine Böhler Edelstahl Gmbh & Co. Kg Method for manufacturing a hot-work steel object

Also Published As

Publication number Publication date
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