JPH01172543A - Manufacture of austenitic stainless steel for boron-containing nuclear power - Google Patents
Manufacture of austenitic stainless steel for boron-containing nuclear powerInfo
- Publication number
- JPH01172543A JPH01172543A JP33044887A JP33044887A JPH01172543A JP H01172543 A JPH01172543 A JP H01172543A JP 33044887 A JP33044887 A JP 33044887A JP 33044887 A JP33044887 A JP 33044887A JP H01172543 A JPH01172543 A JP H01172543A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- austenitic stainless
- powder
- less
- surrounding layer
- 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
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 229910052796 boron Inorganic materials 0.000 title claims description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims 5
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 239000011812 mixed powder Substances 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract 2
- 229910052742 iron Inorganic materials 0.000 claims abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 238000001513 hot isostatic pressing Methods 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910001566 austenite Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、中性子を放射する原子力廃棄物の貯蔵や輸送
あるいは中性子遮蔽材用に用いるオーステナイト系ステ
ンレス鋼の製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing austenitic stainless steel used for storing and transporting nuclear waste that emits neutrons or for neutron shielding materials.
中性子を遮蔽しかつ耐食性を有する材料として、Ｂを含
有したオーステナイト系ステンレス鋼が有用であり、そ
の供給が要請されている。しかしながら、Ｂを０．５％
以上含有させたオーステナイト系ステンレス鋼は熱間加
工性が非常に劣悪であるため、大量供給の要請に応え難
かった。B-containing austenitic stainless steel is useful as a material that shields neutrons and has corrosion resistance, and its supply is requested. However, 0.5% B
Since the austenitic stainless steel containing the above content has extremely poor hot workability, it has been difficult to meet the demand for mass supply.
従来、特開昭５５−３４６３６号公報に記載されている
ように、Ｂを限定量含有させ、かつＡＩ／Ｎを限定する
ことによりオーステナイト結晶粒を微細化させて、熱間
加工性を改善する技術が知られている。Conventionally, as described in JP-A-55-34636, austenite crystal grains are refined by containing a limited amount of B and limiting AI/N to improve hot workability. The technology is known.
上記公知の技術をもってしても、Ｂを含有することによ
る熱間脆性の問題は完全には解決し得す、熱間加工に際
しては厳密な条件を守る必要があり、工業的技術として
完全ではない。Even with the above-mentioned known technology, the problem of hot embrittlement due to the inclusion of B cannot be completely solved, but strict conditions must be observed during hot processing, and it is not perfect as an industrial technology. .
本発明は、Ｂを含有することによる熱間脆性の問題を完
全に解決し、熱間加工によって工業的規模で含Ｂ原子力
用オーステナイト系ステンレス鋼を製造することを目的
とする。The object of the present invention is to completely solve the problem of hot embrittlement due to the inclusion of B, and to produce a B-containing austenitic stainless steel for nuclear power use on an industrial scale by hot working.
〔問題点を解決するための手段１作用］本発明法は、オ
ーステナイト系ステンレス鋼粉末にフェロボロン粉末を
混合した混合粉末の周囲に、該オーステナイト系ステン
レス鋼粉末の囲繞層を形成し、熱間等方圧加圧して鋼片
とし、しがるのち熱間加工するものである。[Means for Solving the Problems 1 Effect] The method of the present invention forms a surrounding layer of austenitic stainless steel powder around a mixed powder of austenitic stainless steel powder and ferroboron powder, and It is pressurized to form a steel billet, which is then hardened and then hot worked.
オーステナイト系ステンレス鋼粉末とフェロボロン粉末
の混合割合は、Ｂ量が重量％にて総量の０．５〜５．０
χとなるようにする。Ｂが０．５！未満では中性子遮蔽
の顕著な効果がなく、５．０χを越えると鋼の常温にお
ける延性ならびに靭性の劣化が顕著になるからである。The mixing ratio of austenitic stainless steel powder and ferroboron powder is such that the amount of B is 0.5 to 5.0% by weight of the total amount.
Make it so that χ. B is 0.5! This is because if it is less than 5.0x, there is no significant neutron shielding effect, and if it exceeds 5.0x, the ductility and toughness of the steel at room temperature will deteriorate significantly.
Ｂのうち自然状態で１９．９χ含まれる同位元素１°Ｂ
は中性子吸収断面積の大きい原子であり、中性子遮蔽の
効果が大きく、この効果はＢが化合物になっていても変
わらない。Of B, the isotope 1°B contains 19.9χ in its natural state.
is an atom with a large neutron absorption cross section and has a large neutron shielding effect, and this effect does not change even if B is a compound.
混合粉末の周囲に形成するオーステナイト系ステンレス
鋼粉末の囲繞層の厚さは、熱間等方圧加圧して得た鋼片
における厚さで５ｍｍ以上とする。The thickness of the surrounding layer of austenitic stainless steel powder formed around the mixed powder is 5 mm or more in the steel piece obtained by hot isostatic pressing.
この厚さが５ｍｍ未満だと、鋼片を熱間加工する際に低
融点の硼化物が露出し、熱間加工温度で硼化物が溶融状
態になり、そこから割れが進展するからである。If the thickness is less than 5 mm, low-melting-point borides will be exposed when the steel piece is hot-worked, and the boride will become molten at the hot-working temperature, and cracks will develop from there.
混合粉末の周囲にオーステナイト系スンレス鋼粉末の囲
繞層を形成するには、熱間等方圧加圧機内にて、たとえ
ばつぎのようにして行う。まず、加圧機内の底にオース
テナイト系スンレス鋼粉末を敷きつめ、ついで、加圧機
内の側壁との間に間隙を持たせて枠を装入し、枠内に混
合粉末を加圧機内の上面との間に間隙を持たせて装入し
、枠と加圧機内の側壁との間隙にオーステナイト系スン
レス鋼粉末を装入し、枠を取り除き、最後に混合粉末を
オーステナイト系ステンレス鋼粉で覆う。The surrounding layer of austenitic stainless steel powder is formed around the mixed powder in a hot isostatic pressing machine, for example, as follows. First, austenitic stainless steel powder is spread on the bottom of the pressurizer, then a frame is inserted with a gap between it and the side wall of the pressurizer, and the mixed powder is placed in the frame between the top surface of the pressurizer and the frame. The austenitic stainless steel powder is charged into the gap between the frame and the side wall of the pressurizer, the frame is removed, and finally the mixed powder is covered with the austenitic stainless steel powder.
このようにして熱間等方圧加圧機内に粉末を装入した後
、不活性ガスを導入して加圧しつつ加熱して鋼片とする
。After the powder is charged into the hot isostatic press machine in this way, an inert gas is introduced and the powder is heated while being pressurized to form a steel billet.
オーステナイト系ステンレス鋼粉末の組成は、（１）重
量％にてＣ：０．１％以下、 Ｓｉ：１．０％以下。The composition of the austenitic stainless steel powder is (1) C: 0.1% or less, Si: 1.0% or less in weight percent.
Ｍｎ：２．０％以下、 Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０ｇを含有し、残部Ｆｅおよび
不可避的不純物（２）重量％ニテＣ：０．ＩＸ以下、
Ｓｉ：１．０％以下。Mn: 2.0% or less, Ni: 7.0 to 25.0%,
Contains Cr: 11.0 to 27.0 g, balance Fe and unavoidable impurities (2) weight% Nite C: 0. Below IX,
Si: 1.0% or less.
Ｍｎ：２．０％以下、 Ｎｉ：７．０〜２５．０Ｘ、
Ｃｒ：１１．０〜２７．０％。Mn: 2.0% or less, Ni: 7.0 to 25.0X,
Cr: 11.0-27.0%.
Ｍｏ：０．３〜３．０χを含有し、残部Ｆｅおよび不可
避的不純物
（３）重量％にてＣ：０．１％以下、 Ｓｉ：１．０％
以下。Contains Mo: 0.3 to 3.0χ, balance Fe and unavoidable impurities (3) weight%, C: 0.1% or less, Si: 1.0%
below.
Ｍｎ：２．０”ｌ以下、 Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０！。Mn: 2.0”l or less, Ni: 7.0 to 25.0%,
Cr:11.0~27.0! .
Ｃｕ：０．３〜２．０χを含有し、残部Ｆｅおよび不可
避的不純物
（４）重量％にてＣ：０．１％以下、 Ｓｉ：１．０％
以下。Cu: Contains 0.3 to 2.0χ, balance Fe and unavoidable impurities (4) weight% C: 0.1% or less, Si: 1.0%
below.
Ｍｎ：２．０％以下、 Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０％。Mn: 2.0% or less, Ni: 7.0 to 25.0%,
Cr: 11.0-27.0%.
Ｍｏ：０．３〜３．０％、 Ｃｕ：０．３〜２．０χを
含有し、残部Ｆｅおよび不可避的不純物
とする。Contains Mo: 0.3 to 3.0%, Cu: 0.3 to 2.0%, and the remainder is Fe and inevitable impurities.
Ｃは、０．１χを越えると炭化物が生成しやすくなり、
鋼の耐食性が劣化するので０．１％以下とした。When C exceeds 0.1χ, carbide tends to be generated,
Since the corrosion resistance of steel deteriorates, the content is set at 0.1% or less.
Ｓｉは、脱酸のため添加するが、１．０χを越えると鋼
が脆化するので１．０％以下とした。Si is added for deoxidation, but if it exceeds 1.0χ, the steel becomes brittle, so it is set at 1.0% or less.
Ｍｎは、オーステナイト組織の安定化に有効であるが、
２．０χを越えると孔食発生の起点となる硫化物系介在
物が多量に生成し、耐食性が著しく劣化するので、２．
０％以下とした。Mn is effective in stabilizing the austenite structure, but
If it exceeds 2.0χ, a large amount of sulfide-based inclusions, which become the starting point for pitting corrosion, will be generated, and the corrosion resistance will be significantly deteriorated.
It was set to 0% or less.
Ｎｉは、鋼の組織をオーステナイトとするために７．０
％以上必要で万り、２５．０χを越えて添加すると高価
になるので、７．０〜２５．０χとした。Ni is 7.0 to make the steel structure austenite.
% or more, and adding more than 25.0χ would be expensive, so it was set at 7.0 to 25.0χ.
Ｃｒは、鋼の耐食性を保持させるため１１．０２：以上
の添加が必要であり、２７．０χを越えて添加すると鋼
が脆化するので、１１．０〜２７．０χとした。Cr needs to be added in an amount of 11.02: or more in order to maintain the corrosion resistance of the steel, and since adding more than 27.0x causes the steel to become brittle, it was set at 11.0 to 27.0x.
Ｍｏは、０．３％以上添加すると鋼の耐食性なかても耐
孔食性が向上し、３．０χを越えると脆化するので、特
に耐食性が要求される場合に添加し、その量を０．３〜
３．０χとした。When Mo is added in an amount of 0.3% or more, the corrosion resistance, especially the pitting corrosion resistance, of the steel improves, and when it exceeds 3.0χ, it becomes brittle, so it is added when particularly corrosion resistance is required, and the amount is reduced to 0.3%. 3～
It was set to 3.0χ.
Ｃｕは、０．２％以上添加すると耐酸性が向上し、２．
０χを越えると鋼の熱間加工性が劣化するので、特に耐
酸性が要求される場合に添加し、その量を０．２〜２．
０χとした。Adding 0.2% or more of Cu improves acid resistance; 2.
If it exceeds 0χ, the hot workability of the steel deteriorates, so it is added especially when acid resistance is required, and the amount is 0.2 to 2.
It was set to 0χ.
ＭｏおよびＣｕを複合添加すると、上記それぞれの効果
が複合して発揮されるので、そのような特性が要求され
る場合に添加し、その量をＭｏについては０．３〜３．
０Ｘ、Ｃｕについては０．２〜２．０χとした。When Mo and Cu are added in combination, the effects of each of the above are exhibited in combination, so they are added when such characteristics are required, and the amount for Mo is 0.3 to 3.
For 0X and Cu, it was set to 0.2 to 2.0χ.
本発明法によれば、熱間等方圧加圧して得られた鋼片の
表面が、Ｂを含まないオーステナイト系ステンレス鋼で
覆われているので、通常のオーステナイト系ステンレス
鋼と同様に熱間加工することが出来る。そして、熱間加
工して得られた製品あるいはこれをさらに冷間加工して
得られた製品は、表面が通常のオーステナイト系ステン
レス鋼と同様に耐食性を有しているとともに、内部には
Ｂが必要量均一に分散しているので、中性子遮蔽効果が
優れている。さらに、内部もオーステナイト系ステンレ
ス鋼であって耐食性を有しているので、製品を溶接した
ときに内部の鋼が表面に露出しても耐食性が劣化し難い
。According to the method of the present invention, the surface of the steel piece obtained by hot isostatic pressing is covered with B-free austenitic stainless steel. It can be processed. Products obtained by hot working or products obtained by further cold working have the same corrosion resistance on the surface as ordinary austenitic stainless steel, and the interior contains B. Since the required amount is uniformly dispersed, the neutron shielding effect is excellent. Furthermore, since the inside is also made of austenitic stainless steel and has corrosion resistance, the corrosion resistance is unlikely to deteriorate even if the internal steel is exposed to the surface when the product is welded.
表１に本発明法による熱間加工の結果を従来法と比較し
て示す。熱間等方圧加圧は、オーステナイト系ステンレ
ス鋼粉末とフェロボロン粉末の混合粉末の周囲に該オー
ステナイト系ステンレス鋼粉末の囲繞層を形成した合計
１３ｋｇの粉末を、温度１２００°Ｃ１圧力１０００気
圧で２時間加圧して行い、得られた材料の表面を研削し
て厚さ５０ｍｍの鋼片を製造した。従来例の鋳造は、真
空溶解した１００ ｋｇの鋼塊を鋳型に鋳造して行い、
得られた材料を切断し表面を研削して、本発明例と同一
サイズの鋼片を製造した。Table 1 shows the results of hot working by the method of the present invention in comparison with the conventional method. In hot isostatic pressing, a total of 13 kg of powder, in which a surrounding layer of austenitic stainless steel powder was formed around a mixed powder of austenitic stainless steel powder and ferroboron powder, was heated at a temperature of 1200°C and a pressure of 1000 atm for 2 hours. Pressure was applied for a period of time, and the surface of the obtained material was ground to produce a steel piece with a thickness of 50 mm. Conventional casting is carried out by casting a vacuum-melted 100 kg steel ingot into a mold.
The obtained material was cut and the surface ground to produce a steel piece of the same size as the example of the present invention.
鋼片の化学成分は、鋼片の内部の分析値を示し、熱間等
方圧加圧によるものの表面層の分析値は、Ｂ以外の成分
については内部と同じでＢは含まれていない。The chemical composition of the steel slab indicates the analysis value of the inside of the steel slab, and the analysis value of the surface layer obtained by hot isostatic pressing is the same as the inside with respect to components other than B, and B is not included.
熱間加工性は、５０ｍｍ厚の鋼片を６ｍｍ厚まで熱間圧
延して評価した。Hot workability was evaluated by hot rolling a 50 mm thick steel slab to 6 mm thickness.
表１のＮαに＊印を付したものが本発明例であり、いず
れもＢ無添加のものと同様に良好な熱間加工性を示して
いることがわかる。The examples marked with * in Table 1 are the examples of the present invention, and it can be seen that all of them exhibit good hot workability as well as those without B additive.
本発明例で得られた含Ｂオーステナイト系ステンレス鋼
は、いずれも顕著な中性子遮蔽効果が得られた。耐食性
については、Ｂ添加ステンレス鋼の使用環境である微量
Ｃ１−イオンを含む硼酸溶液（２５００ｐｐｍＨＪＯｓ
＋１００ｐｐ１００ｐｐ中で温水浸漬試験（８０°Ｃ）
シた結果、本発明例で得られたものの耐食性はＢ無添加
のものと同等であった。また、Ｍｏ、 Ｃｕを単独ある
いは複合添加したものの耐食性は、さらに優れたもので
あった。なお、溶接部もほぼ同等の耐食性を示した。All of the B-containing austenitic stainless steels obtained in the examples of the present invention had a remarkable neutron shielding effect. Regarding corrosion resistance, a boric acid solution (2500 ppm HJOs) containing trace amounts of C1- ions, which is the usage environment for B-added stainless steel,
Hot water immersion test (80°C) in +100pp100pp
As a result, the corrosion resistance of the samples obtained in the examples of the present invention was equivalent to that of samples without B additive. Furthermore, the corrosion resistance of the alloys in which Mo and Cu were added alone or in combination was even better. The welded parts also showed almost the same corrosion resistance.
本発明は、今後ますます需要の増加が予想される原子力
廃棄物の貯蔵や輸送あるいは中性子遮蔽のためのオース
テナイト系ステンレス鋼の実用的製造法を提供するもの
であり、工業的価値は絶大である。The present invention provides a practical method for producing austenitic stainless steel for the storage and transportation of nuclear waste and for neutron shielding, the demand of which is expected to increase in the future, and has enormous industrial value. .
Claims (4)
下、Ｍｎ：２．０％以下、Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０％を含有し、残部Ｆｅおよび
不可避的不純物からなるオーステナイト系ステンレス鋼
粉末に、フェロボロン粉末をＢ量が重量％にて総量の０
．５〜５．０％となるように混合した混合粉末の周囲に
、前記オーステナイト系ステンレス鋼粉末の囲繞層を形
成し、熱間等方圧加圧して該囲繞層の厚さが５ｍｍ以上
の鋼片とし、しかるのち熱間加工することを特徴とする
含ボロン原子力用オーステナイト系ステンレス鋼の製造
法。(1) In weight%, C: 0.1% or less, Si: 1.0% or less, Mn: 2.0% or less, Ni: 7.0 to 25.0%,
Ferroboron powder was added to the austenitic stainless steel powder containing 11.0 to 27.0% Cr and the balance consisting of Fe and unavoidable impurities, with the amount of B being 0% by weight of the total amount.
．． A surrounding layer of the austenitic stainless steel powder is formed around the mixed powder at a concentration of 5 to 5.0%, and hot isostatic pressure is applied to form a steel in which the surrounding layer has a thickness of 5 mm or more. A method for manufacturing boron-containing austenitic stainless steel for nuclear power use, which is characterized by cutting into pieces and then hot working.
下、Ｍｎ：２．０％以下、Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０％、Ｍｏ：０．３〜３．０％
を含有し、残部Ｆｅおよび不可避的不純物からなるオー
ステナイト系ステンレス鋼粉末に、フェロボロン粉末を
Ｂ量が重量％にて総量の０．５〜５．０％となるように
混合した混合粉末の周囲に、前記オーステナイト系ステ
ンレス鋼粉末の囲繞層を形成し、熱間等方圧加圧して該
囲繞層の厚さが５ｍｍ以上の鋼片とし、しかるのち熱間
加工することを特徴とする含ボロン原子力用オーステナ
イト系ステンレス鋼の製造法。(2) In weight%, C: 0.1% or less, Si: 1.0% or less, Mn: 2.0% or less, Ni: 7.0 to 25.0%,
Cr: 11.0-27.0%, Mo: 0.3-3.0%
around a mixed powder in which ferroboron powder is mixed with austenitic stainless steel powder containing Fe and unavoidable impurities with the balance being Fe and unavoidable impurities so that the amount of B is 0.5 to 5.0% by weight of the total amount. , a boron-containing nuclear power plant characterized in that a surrounding layer of the austenitic stainless steel powder is formed, hot isostatic pressure is applied to form a steel billet in which the surrounding layer has a thickness of 5 mm or more, and then hot working is performed. Manufacturing method for austenitic stainless steel.
下、Ｍｎ：２．０％以下、Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０％、Ｃｕ：０．３〜２．０％
を含有し、残部Ｆｅおよび不可避的不純物からなるオー
ステナイト系ステンレス鋼粉末に、フェロボロン粉末を
Ｂ量が重量％にて総量の０．５〜５．０％となるように
混合した混合粉末の周囲に、前記オーステナイト系ステ
ンレス鋼粉末の囲繞層を形成し、熱間等方圧加圧して該
囲繞層の厚さが５ｍｍ以上の鋼片とし、しかるのち熱間
加工することを特徴とする含ボロン原子力用オーステナ
イト系ステンレス鋼の製造法。(3) In weight%, C: 0.1% or less, Si: 1.0% or less, Mn: 2.0% or less, Ni: 7.0 to 25.0%,
Cr: 11.0-27.0%, Cu: 0.3-2.0%
around a mixed powder in which ferroboron powder is mixed with austenitic stainless steel powder containing Fe and unavoidable impurities with the balance being Fe and unavoidable impurities so that the amount of B is 0.5 to 5.0% by weight of the total amount. , a boron-containing nuclear power plant characterized in that a surrounding layer of the austenitic stainless steel powder is formed, hot isostatic pressure is applied to form a steel billet in which the surrounding layer has a thickness of 5 mm or more, and then hot working is performed. Manufacturing method for austenitic stainless steel.
下、Ｍｎ：２．０％以下、Ｎｉ：７．０〜２５．０％、
Ｃｒ：１１．０〜２７．０％、Ｍｏ：０．３〜３．０％
、Ｃｕ：０．３〜２．０％を含有し、残部Ｆｅおよび不
可避的不純物からなるオーステナイト系ステンレス鋼粉
末に、フェロボロン粉末をＢ量が重量％にて総量の０．
５〜５．０％となるように混合した混合粉末の周囲に、
前記オーステナイト系ステンレス鋼粉末の囲繞層を形成
し、熱間等方圧加圧して該囲繞層の厚さが５ｍｍ以上の
鋼片とし、しかるのち熱間加工することを特徴とする含
ボロン原子力用オーステナイト系ステンレス鋼の製造法
。(4) In weight%, C: 0.1% or less, Si: 1.0% or less, Mn: 2.0% or less, Ni: 7.0 to 25.0%,
Cr: 11.0-27.0%, Mo: 0.3-3.0%
, Cu: 0.3 to 2.0%, and the balance is Fe and unavoidable impurities, and ferroboron powder is added to the austenitic stainless steel powder containing 0.3 to 2.0% of Cu, and the balance is Fe and unavoidable impurities.
Around the mixed powder mixed so that it was 5 to 5.0%,
A boron-containing nuclear power application characterized in that a surrounding layer of the austenitic stainless steel powder is formed, hot isostatic pressure is applied to obtain a steel billet in which the surrounding layer has a thickness of 5 mm or more, and then hot working is performed. Manufacturing method of austenitic stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33044887A JPH01172543A (en) | 1987-12-26 | 1987-12-26 | Manufacture of austenitic stainless steel for boron-containing nuclear power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33044887A JPH01172543A (en) | 1987-12-26 | 1987-12-26 | Manufacture of austenitic stainless steel for boron-containing nuclear power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01172543A true JPH01172543A (en) | 1989-07-07 |
| JPH0461060B2 JPH0461060B2 (en) | 1992-09-29 |
Family
ID=18232731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33044887A Granted JPH01172543A (en) | 1987-12-26 | 1987-12-26 | Manufacture of austenitic stainless steel for boron-containing nuclear power |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01172543A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321809A (en) * | 2018-10-26 | 2019-02-12 | 冯英育 | Absorb the nanometer powder stainless steel radiated and its manufacturing method and application |
-
1987
- 1987-12-26 JP JP33044887A patent/JPH01172543A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321809A (en) * | 2018-10-26 | 2019-02-12 | 冯英育 | Absorb the nanometer powder stainless steel radiated and its manufacturing method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0461060B2 (en) | 1992-09-29 |
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