JP7160694B2 - 流体接触部材及び流体接触部材の製造方法 - Google Patents
流体接触部材及び流体接触部材の製造方法 Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 229910017052 cobalt Inorganic materials 0.000 claims description 11
- 239000010941 cobalt Substances 0.000 claims description 11
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 11
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 10
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- 239000010937 tungsten Substances 0.000 claims description 8
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Description
はじめに、実施例1として、上記の弁体83(図9等参照)を模した流体接触部材10を図14に示す製造装置300を用いて作製し、作製した流体接触部材10の性能評価を行った。
以上のように、実施例1では、耐食性を含む様々な性能に優れた流体接触部材10を製造できた。従って、2次アーム5の平均間隔を5μm以下にすることで、特に耐食性に優れた流体接触部1を備える流体接触部材10を製造できた。
熱処理工程S8の有無による残留応力緩和効果について、図16に示す製造装置400を用いて実施例2の流体接触部材10を製造して評価した。
10 流体接触部材
100 製造装置
101 母材
105 内ノズル
106 外ノズル
107 レーザ光
108 原料
111 流体接触部
115 ノズル
125 シールドノズル
126 原料供給ノズル
2 コバルト基合金相
20 弁
200 製造装置
21 コバルト基合金相
3 化合物相
300 製造装置
330 レーザ発振器
331 プロセスファイバ
340 高周波加熱コイル
341 高周波電源
360 粉末供給機
361 ホース
4 1次アーム
400 製造装置
440 リボンヒータ
441 電源
5 2次アーム
70 ひずみゲージ
81 弁棒
82 弁箱
83 弁体(流体接触部材)
84 接触部(流体接触部)
85 弁座本体部(母材)
86 弁座(流体接触部材)
87 接触部(流体接触部)
88 弁体本体部(母材)
L1 中心線
L2 中心線
Claims (12)
- 流体と接触する流体接触部を備え、
前記流体接触部は、デンドライトを有するコバルト基合金相と、前記デンドライトの間隙に形成されるとともに炭化クロムを含む化合物相とを有し、
前記流体接触部は、
炭素を0.9質量%以上、
クロムを26質量%以上32質量%以下、
タングステンを0質量%以上6質量%以下、
ニッケルを0質量%以上1質量%以下、
鉄を0質量%以上1質量%以下、
モリブデンを0質量%以上1質量%以下、及び、
残部としてコバルト、及び不可避的不純物からなり、
前記デンドライトを構成する1つの1次アームから延びる複数の2次アームのうち、隣接する前記2次アームの平均間隔が5μm以下になっている
ことを特徴とする、流体接触部材。 - 前記平均間隔は3μm以下である
ことを特徴とする、請求項1に記載の流体接触部材。 - 前記化合物相は前記デンドライトの間隙に不連続的に形成される
ことを特徴とする、請求項1又は2に記載の流体接触部材。 - 前記流体接触部は、3質量%以上6質量%以下の割合でタングステンを含む
ことを特徴とする、請求項1~3の何れか1項に記載の流体接触部材。 - 原子力設備用の流体接触部材を含む
ことを特徴とする、請求項1~4の何れか1項に記載の流体接触部材。 - 弁体及び弁座のうちの少なくとも一方を含む
ことを特徴とする、請求項1~5の何れか1項に記載の流体接触部材。 - 請求項1~6の何れか1項に記載の流体接触部材を製造する方法であって、
コバルト、クロム及び炭素を含む原料の母材への供給位置の移動を行いながら前記母材上での前記原料の溶融を行う溶融工程を含み、
前記溶融工程における前記溶融は、前記移動の距離あたり前記原料への入熱量をQ(kJ/cm)、前記移動の距離あたりの前記母材への前記原料の供給量(g/cm)をW(kJ/g)とすると、
Q≦12kJ/cm、かつ、
2kJ/g≦Q/W≦60kJ/g
になるように行う
ことを特徴とする、流体接触部材の製造方法。 - 前記溶融工程における溶融は、前記原料を含む粉末及び前記原料を含む線材のうちの少なくとも一方の原料を用いた付加製造技術によって行う
ことを特徴とする、請求項7に記載の流体接触部材の製造方法。 - 前記溶融工程は、前記母材の温度及びパス間温度のうちの少なくとも一方の温度を200℃以上700℃以下の状態で積層造形を行う
ことを特徴とする、請求項7又は8に記載の流体接触部材の製造方法。 - 前記溶融工程後、前記母材から外部への放熱速度が自然冷却速度よりも遅い速度での冷却を行う冷却工程を含む
ことを特徴とする、請求項7~9の何れか1項に記載の流体接触部材の製造方法。 - 前記冷却工程における冷却は、前記母材から外部への放熱を抑制するための放熱抑制部材を前記母材に接触させて行う
ことを特徴とする、請求項10に記載の流体接触部材の製造方法。 - 前記溶融工程後、200℃以上700℃以下の温度で熱処理を行う熱処理工程を含む
ことを特徴とする、請求項7~11の何れか1項に記載の流体接触部材の製造方法。
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