JPH0235330A - Method for forming specimen whose creep life consumption rate is known - Google Patents
Method for forming specimen whose creep life consumption rate is knownInfo
- Publication number
- JPH0235330A JPH0235330A JP18481788A JP18481788A JPH0235330A JP H0235330 A JPH0235330 A JP H0235330A JP 18481788 A JP18481788 A JP 18481788A JP 18481788 A JP18481788 A JP 18481788A JP H0235330 A JPH0235330 A JP H0235330A
- Authority
- JP
- Japan
- Prior art keywords
- rupture
- consumption rate
- time
- test piece
- creep
- 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
- 238000000034 method Methods 0.000 title claims description 6
- 238000012360 testing method Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 abstract description 12
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は、高温環境下で使用される構造材のクリープ
寿命消費率を推測するのに必要不可欠である寿命消費率
が既知である試料を短時間で効率的に作成することがで
きるクリープ寿命消費率が既知の試料の作成方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention is applicable to a sample whose lifetime consumption rate is known, which is essential for estimating the creep life consumption rate of structural materials used in high-temperature environments. The present invention relates to a method for preparing a sample with a known creep life consumption rate that can be efficiently prepared in a short time.
「従来の技術」
高温環境下で使用される構造材は使用中にクリープ破断
する恐れがあり、このため、たとえば、長′時間使用さ
れた石油精製化学プラントなどの加熱炉あるいは反応炉
等では、１年に１回程度その構］３４Ａのクリープ寿命
消費率を調査し安全性を担保しでいる。"Prior Art" Structural materials used in high-temperature environments may undergo creep rupture during use. The creep life consumption rate of 34A is investigated to ensure safety.
しかして、その借逓］Δ自体のクリープ破断試験からク
リープ寿命消費率を知るために（」、供試料の採１１’
ｌ ：Ｆ；、１−び試験に多大の労力と時間を要する。Therefore, in order to know the creep life consumption rate from the creep rupture test of Δ itself,
1: F;, 1- and testing require a great deal of effort and time.
そこで、その構造材と同−祠ネ４の試験片を用いて種々
のクリープ寿命消費率が既知である試ネ−１を作成し、
これらの試１ｉ：ｌを用しビζクリープ寿命消費率と硬
さあろい（」７ｕ流抵抗値等どの関係を予め調へておき
、このデータとその構造材を調査して得られた硬さある
い（」電流抵抗値等とを比較してその構造材の］Ｉ命消
費率を４ＣＣａｔｌｌしている。Therefore, test pieces 1 of which various creep life consumption rates are known were created using test pieces of the same material as the structural material.
Using these test 1i:l, the relationship between Biζ creep life consumption rate and hardness assorted ('7u flow resistance value, etc.) was determined in advance, and the hardness obtained by investigating this data and the structural material. The life consumption rate of the structural material is calculated by comparing it with the current resistance value, etc.
ところで、従来、このようなりリープ寿命消費＞４３が
既知である試料（」、試験片の平行部全体を均にある一
定の温度’ｌ’、（’Ｃ）に保持しながら、ある一定の
応力σ１（ｋｇｆ／ｍｍ’）を負荷して行うクリープ破
断試験を、あるｌ’！Ｊｌｆｉｌ ｔ ］（ｈ ｒ ）
で中断することにより作成されている。ここで、この試
別の使用時間はｔ、（ｈｒ）であるので、この試験片と
同一材料の他の試験片を月１いノークリープ破断試験に
おいて得られノご破断時間がり、（ｈｒ）であったとす
るど、この試１１ ｔＪ、
寿命消費率−使用時間／破断時間−ｔ＋／ｌ。By the way, in the past, a sample ('') with a known leap life consumption of >43, was applied to a certain stress while uniformly holding the entire parallel part of the test piece at a certain temperature 'l', ('C). A creep rupture test is carried out with a load of σ1 (kgf/mm').
It is created by interrupting. Here, since the usage time of this test is t, (hr), the rupture time of this test piece and another test piece of the same material obtained in a monthly no-creep rupture test is t, (hr). Assuming that this test was 11 tJ, life consumption rate - usage time/rupture time - t+/l.
の試ネ：ｌということになる。The test result is: l.
「発明が解決しようとする課題−１
しかしながら、」１記のような方法では、作成に長時間
を要するにもかかイつらず、作成された試料の寿命消費
率が一定であるので、種々の寿命消費率の試料を得るた
めには、多数の試験片について」１記のクリープ試験を
行なう必要かあった。このため、多大の労力と時間を必
要とした。``Problem to be Solved by the Invention-1'' However, although the method described in 1. takes a long time to prepare, the lifetime consumption rate of the prepared sample is constant, so it is difficult to solve various problems. In order to obtain a lifetime consumption rate sample, it was necessary to conduct the creep test described in ``1'' on a large number of test specimens. This required a great deal of effort and time.
また、」１記の方法で得られた使用時間ｔ、の試料の寿
命消費率の計算に用いる破断時間ｔ ２ｆＪ他の試験片
の破断時間であるので、算出された寿命消費率に（Ｊ試
験片間の破断時間のばらつきによる誤差が含まれて１．
まうという欠点があった。In addition, since the rupture time t used to calculate the life consumption rate of the sample with the usage time t obtained by the method described in 1.2fJ is the rupture time of another test piece, the calculated life consumption rate (J test 1. Includes errors due to variations in fracture time between pieces.
There was a drawback to it.
この発明は、」１記事情に鑑みなされたしので、その目
的とするところは、寿命消費率が既知である試料を短時
間で効率的にかつより正確な）ｉ命消費率を持つように
作成することかできるクリープ寿命消費率が既知の試オ
ニｌの作成方法を提供することにある。The present invention has been made in view of the circumstances described in item 1.The purpose of this invention is to efficiently convert a sample whose life consumption rate is known to have a life consumption rate that is more accurate and efficient in a short time. The object of the present invention is to provide a method for creating a test specimen whose creep life consumption rate is known.
１課題を解決するための手段−１
」−記［」的を達成するために、この発明（ｊ１クリー
プ破断試験の同一試験片においては、応力と破断１１ｊ
Ｊのラーマン・ミラーパラメータとかｌ対Ｉの対応をす
ることに５’ｔ ｌｌ したしので、試験片平行部の軸
線方向の温度を不均一な状態としてクリープ破断試験を
行うごどにより試１ｉ１を作成ケることを特徴とり一ろ
ちのである。1 Means for Solving Problems-1 In order to achieve the objective described in ``-1'', this invention (in the same test piece for the j1 creep rupture test, stress and rupture 11j
Since we decided to make the correspondence between the Raman-Miller parameters of J and I versus I, we carried out test 1i1 by performing a creep rupture test with the temperature in the axial direction of the parallel part of the specimen being non-uniform. It is unique in that it can be created.
［作用 」
この発明において（」、試験片平行部をその軸線方向に
連続的に変化した１Ｍ１度分布の状態にしてクリープ破
断試験を行うと、最高温度部で破断し、ごれにより最高
温度部の破断時間（クリープ破断寿命）か得られろ。[Function] In this invention, when a creep rupture test is carried out on the parallel part of a specimen in a state with a 1M1 degree distribution that changes continuously in the axial direction, the specimen ruptures at the highest temperature part, and due to dirt, the highest temperature part Find the rupture time (creep rupture life) of
このクリープ破断ノミ命（ｊ、／ｌＳ度ど破断時間の関
数であるラーマン・ミラーパラメータＰて表すことかで
きる。This creep rupture chisel life (j, /lS) can be expressed as the Raman-Miller parameter P, which is a function of the rupture time.
１〕−１’ （（！ｏｇＬ ｉＣ） ｘ ｌ ０ここで
、Ｔ、温度（Ｋ ）
［、破断時間（１〕ｒ）
Ｃ材料定数
同−月利のクリープ破断挙動においては、負荷応力と破
断時のラーマン・ミラーパラメータとは、Ｉ対Ｉの対応
をケるので、」１記クリープ破断試験においては試験片
の各部分（温度が異なる）においてラーマン・ミラーパ
ラメータは」−記最高’／Ｍ４度部の値ど同じとなる。1]-1' ((!ogL iC) x l 0 where, T, temperature (K) [, rupture time (1]r) The Raman-Miller parameters at the time have an I to I correspondence, so in the creep rupture test described in 1., the Raman-Miller parameters for each part of the test piece (at different temperatures) are ``-maximum''/M4 The value of the degree will be the same.
このことから、他の温度の部分の予想破断時間を、上記
ラーマン・ミラーパラメータの値から算出することがで
きる。From this, it is possible to calculate the expected rupture time of the portions at other temperatures from the values of the Raman Miller parameters.
使用時間は試験片のすべての部分で上記クリープ破断試
験の破断時間であるので、各部分のクリープ寿命消費率
（−使用時間／破断時間）を求めることができる。Since the usage time is the rupture time in the creep rupture test for all parts of the test piece, the creep life consumption rate (-usage time/rupture time) of each part can be determined.
このようにこの発明においては、１つの試験片から連続
的に変化した寿命消費率を持つ試料か得られる。In this way, in the present invention, a sample having a lifetime consumption rate that varies continuously can be obtained from one test piece.
１一実施例 Ｉ
以下、この発明を２．２５Ｃｒ−ＩＭｏ鋼の試料の作成
に適用しノコ具体例に基ついて詳述する。11 Example I Hereinafter, the present invention will be applied to the preparation of a sample of 2.25Cr-IMo steel, and a specific example of a saw will be described in detail.
２．２５０ｒ−ＩＭｏ鋼の試験片を用い、この試験片の
平行部を、ヒータの温度を軸線方向に沿って変えること
により、第１図に示すような軸線方向に連続的に変化し
たｌ、１．１１５度分布の状態にして、クリープ破断試
験をいくつかの応力について行った。2. Using a test piece of 250r-IMo steel, the parallel part of this test piece was continuously changed in the axial direction as shown in Fig. 1 by changing the temperature of the heater along the axial direction. Creep rupture tests were conducted for several stresses with a 1.115 degree distribution.
試験の結果、応力の値に拘わらず最高温度部（６６７°
Ｃ）で破断した。As a result of the test, the highest temperature part (667°
It broke at C).
応力３ 、９ ｋｇｆ／ｍｍ２を負荷した試験片を例に
とって説明すると、この試験片の破断時間は８８５９ｈ
ｒであった。したがって、この試験片の応力３９ ｋｇ
ｆ／ｍｍ２に対するクリープ破断寿命は、６７７°Ｃで
８８５．９ｈｒということになる。Taking a test piece loaded with a stress of 3.9 kgf/mm2 as an example, the rupture time of this test piece is 8859 hours.
It was r. Therefore, the stress of this test piece is 39 kg
The creep rupture life for f/mm2 is 885.9 hr at 677°C.
これを、ラーマン・ミラーパラメータＰで表すと、
Ｐ ＝ Ｔ （（ｏｇｔ十〇 ）Ｘ ］ ０ここで、
Ｅ’ 温度（Ｋ）
ｔ 破断時間（ｈｒ ）
Ｃ・＋Ａオ８１定数
（２，２５Ｃｒ−ＩＭｏ［１Ｍに対
しては２０ ）
であるので、
Ｐ−（６７７−１−２７３）（Ｑｏｇ８８５．９＋２０
）ｌ０
＝２１ ８０
となる。Expressing this in terms of the Raman-Miller parameter P, P = T ((ogt 〇)X ] 0 where,
E' temperature (K) t rupture time (hr) C・+Ao81 constant (20 for 2,25Cr-IMo [1M), so P-(677-1-273) (Qog885.9+20
)l0 =21 80.
一定の材料（合金組成、ミクロ組織が同じである飼料）
のクリープ破断挙動においては、負荷応力と破断時のラ
ーソン・ミラーパラメータ（以下、寿命パラメータと称
する）とは、１対１の対応をすると言イツれている。こ
のことから、」１記試験片の平行部では応力が一定（３
，９ｋｇ１’／ｍｍ２）であるので、温度の値に拘わら
ず寿命パラメータ（Ｊ−定の値（２１，８０）となる。Constant material (feed with the same alloy composition, microstructure)
In the creep rupture behavior of a steel, it is said that there is a one-to-one correspondence between the applied stress and the Larson-Miller parameter (hereinafter referred to as the life parameter) at the time of fracture. From this, it can be concluded that the stress is constant (3
, 9kg1'/mm2), the life parameter becomes the J-constant value (21, 80) regardless of the temperature value.
−１−記のことから、試験片の６５０°Ｃの部分（最低
温度の部分）の予想破断時間をｔ３とすると、（６５０
＋２７３）（Ｑｏｇｔ３＋ ２０）ｘ Ｉ ０２１．８
０
となり、これより、ｔ、、＝ ４１５６ ｂｒとなる。-1-, if the expected rupture time of the 650°C part (lowest temperature part) of the test piece is t3, then (650°C
+273) (Qogt3+ 20)x I 021.8
0, and from this, t, , = 4156 br.
使用時間（」試験片のすへての部分で８８５９ｈｒであ
るのて、温度６５０°Ｃの部分におθる寿命消費率は、
寿命消費率−使用時間／破断時間
８８５．９／４１５６
一〇 ２１
となる。Since the usage time (') is 8859 hr in all parts of the test piece, the life consumption rate at the part where the temperature is 650°C is: Life consumption rate - usage time / rupture time 885.9/4156 10 21.
温度か高くなるに従って予想破断時間は短くなるので寿
命消費率は大きくなり最高温度の部分（破断点）でｌと
なる。As the temperature rises, the expected rupture time becomes shorter, so the life consumption rate increases and becomes 1 at the highest temperature (break point).
」１記により、第１図に示す温度分布に対応した０、２
１から１の間の連続的に変化した寿命消費率を持つ試料
が得られたことになる。” 1, 0, 2 corresponding to the temperature distribution shown in Figure 1.
A sample with a lifetime consumption rate that varied continuously between 1 and 1 was obtained.
このようにして作成された試料は、その各部分について
硬ざあるいは電流抵抗値等を測定し、これらとクリープ
寿命消費率との関係を調べ、これらのデータと加熱炉等
の構造材を調査して得られたデータとを比較し、それら
の構造材の寿命消費率を推測することにより、それらの
構造相の安全性を確認するのに使用されろ。The hardness or current resistance value of each part of the sample prepared in this way was measured, the relationship between these and the creep life consumption rate was investigated, and these data and structural materials such as heating furnaces were investigated. It can be used to confirm the safety of structural materials by comparing the data obtained with the above data and estimating the lifetime consumption rate of those structural materials.
「発明の効果」
以」二説明したように、この発明にあっては、つの試験
片で、その平行部の軸線方向に沿って、各部分の温度に
応じた異なる寿命消費率を有する試料が連続的に得られ
る。したがって、寿命消費率が既知である試料を従来よ
り短時間で効率的に作成することができる。``Effects of the Invention'' As explained hereinafter, in the present invention, there are two specimens each having different lifetime consumption rates along the axial direction of the parallel parts depending on the temperature of each part. Obtained continuously. Therefore, a sample with a known lifetime consumption rate can be created more efficiently and in a shorter time than before.
また、破断時間がその試験片自体の破断時間であるので
、より正確な寿命消費率を算出することができる。Furthermore, since the time to break is the time to break of the test piece itself, a more accurate life consumption rate can be calculated.
第１図はこの発明を説明するための図である。 FIG. 1 is a diagram for explaining this invention.
Claims (1)
リープ破断試験を行うことを特徴とするクリープ寿命消
費率が既知の試料の作成方法。A method for preparing a sample with a known creep life consumption rate, characterized in that a creep rupture test is performed with the temperature in the axial direction of the parallel part of the test piece being non-uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18481788A JPH0670606B2 (en) | 1988-07-25 | 1988-07-25 | Creep life consumption method for continuously changing samples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18481788A JPH0670606B2 (en) | 1988-07-25 | 1988-07-25 | Creep life consumption method for continuously changing samples |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0235330A true JPH0235330A (en) | 1990-02-05 |
| JPH0670606B2 JPH0670606B2 (en) | 1994-09-07 |
Family
ID=16159808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18481788A Expired - Lifetime JPH0670606B2 (en) | 1988-07-25 | 1988-07-25 | Creep life consumption method for continuously changing samples |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0670606B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6195314B1 (en) | 1996-08-19 | 2001-02-27 | Hitachi, Ltd. | Objective lens driving device and optical disc apparatus using the same |
| CN108279174A (en) * | 2018-02-06 | 2018-07-13 | 沈阳航空航天大学 | A kind of detection method and device of the failure by shear temperature of material |
| CN113008677A (en) * | 2021-03-02 | 2021-06-22 | 中南大学 | Creep endurance prediction method of nickel-based superalloy |
-
1988
- 1988-07-25 JP JP18481788A patent/JPH0670606B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6195314B1 (en) | 1996-08-19 | 2001-02-27 | Hitachi, Ltd. | Objective lens driving device and optical disc apparatus using the same |
| US6567352B1 (en) | 1996-08-19 | 2003-05-20 | Hitachi, Ltd. | Objective lens driving device and optical disc apparatus using the same |
| US6680883B2 (en) | 1996-08-19 | 2004-01-20 | Hitachi, Ltd. | Objective lens driving device and optical disc apparatus using the same |
| CN108279174A (en) * | 2018-02-06 | 2018-07-13 | 沈阳航空航天大学 | A kind of detection method and device of the failure by shear temperature of material |
| CN113008677A (en) * | 2021-03-02 | 2021-06-22 | 中南大学 | Creep endurance prediction method of nickel-based superalloy |
| CN113008677B (en) * | 2021-03-02 | 2022-06-10 | 中南大学 | Creep endurance prediction method of nickel-based superalloy |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0670606B2 (en) | 1994-09-07 |
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