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W.Nr.2.4610對(duì)應(yīng)國(guó)標(biāo)牌號(hào)

更新時(shí)間:2021-02-25點(diǎn)擊次數(shù):1072

 

 

W.Nr.2.4610

耐腐蝕合金 
材料牌號(hào):Hastelloy C-4
德國(guó)牌號(hào):W.Nr.2.4610
DIN牌號(hào):NiMo16Cr16Ti
牌號(hào):UNS N06455
ISO牌號(hào):NiMo16Cr16Ti
HastelloyC-4是一種奧氏體低碳鎳-鉬-鉻合金。Nicrofer 6616 hMo和早期開發(fā)的相似化學(xué)成分的合金的主要區(qū)別是低碳、硅、鐵、鎢含量。這樣的化學(xué)成分使其在650-1040℃時(shí)表現(xiàn)出好的穩(wěn)定性,提高了抗晶間腐蝕的能力,在適當(dāng)?shù)闹圃鞐l件下可以避免刃線腐蝕敏感性和焊縫熱影響區(qū)腐蝕。 
HastelloyC-4的特點(diǎn)是: 
●對(duì)大多數(shù)腐蝕介質(zhì)具有優(yōu)良的耐腐蝕性,尤其在還原狀態(tài)下。
●在鹵化物中有的耐局部腐蝕性。
HastelloyC-4化學(xué)成分:

 

 

 

小值

余量

14.5

    

14.0

    

大值

17.5

3.0

0.009

1.0

0.05

17.0

2.0

0.7

0.02

0.01

HastelloyC-4物理性能: 
密度:ρ=8.6g/cm3 熔化溫度范圍:1335~1380℃


溫度℃

比熱容J/Kg K

熱導(dǎo)率W/m K

電阻率μΩcm

彈性模量KN/mm2

膨脹系數(shù)10-6/K

0

406

    

20

408

10.1

124

211

 

93

     

100

426

11.4

125

207

10.9

200

448

13.2

126

202

11.9

204

     

300

465

15.0

127

195

12.5

316

     

400

477

16.7

128

188

12.9

427

     

500

490

18.4

129

181

13.2

538

     

600

502

20.5

132

175

13.6

649

     

700

512

22.6

135

168

14.0

760

     

800

522

24.8

138

158

14.5

871

     

900

   

149

15.1

982

     

1000

   

138

15.9

HastelloyC-4機(jī)械性能: 
下表中的小值是標(biāo)定尺寸規(guī)格試樣(固溶處理態(tài))的縱向和橫向上測(cè)得的數(shù)據(jù),特殊規(guī)格產(chǎn)品及特殊材料性能可以按客戶需求定制。 
HastelloyC-4ISO-V 缺口試驗(yàn): 
平均值 ≥120J/cm2 室溫 
≥120J/cm2 -196℃
HastelloyC-4金相結(jié)構(gòu): 
Hastelloy C-4為面心立方晶格結(jié)構(gòu),其化學(xué)成分保證了金相穩(wěn)定性和抗敏化性。 
耐腐蝕性: 
較高的鉬、鉻含量使Hastelloy C-4合金能夠抵抗各種化學(xué)介質(zhì)的侵蝕,包括還原性介質(zhì),如酸、、酸、、有機(jī)或無(wú)機(jī)的含氯介質(zhì)。由于鎳含量較高,Hastelloy C-4能有效的抵抗由于氯導(dǎo)致的應(yīng)力腐蝕開裂,甚至是熱的氯化物溶液。 
應(yīng)用范圍: 
Hastelloy C-4在大多數(shù)化工領(lǐng)域和高溫環(huán)境中得到了廣泛的應(yīng)用。 
典型應(yīng)用領(lǐng)域: 
●煙氣脫系統(tǒng) 
●酸洗和酸再生工廠 
●和農(nóng)用化學(xué)品生產(chǎn) 
●二氧化鈦生產(chǎn)(氯法) 
●電解電鍍 
HastelloyC-4加工和熱處理: 
Hastelloy C-4合金可以通過(guò)傳統(tǒng)生產(chǎn)工藝制造和加工。 
HastelloyC-4加熱: 
在熱處理之前及熱處理過(guò)程中應(yīng)始終保持工件清潔和無(wú)污染。 
在熱處理過(guò)程中不能接觸、、鉛及其它低熔點(diǎn)金屬,否則Nicrofer 6616 hMo合金會(huì)變脆,應(yīng)注意清除諸如標(biāo)記漆、溫度指示漆、彩色蠟筆、潤(rùn)滑油、燃料等污物。燃料中的含量越低越好,天然氣中的含量應(yīng)少于0.1%,重油中含量應(yīng)少于0.5%。電爐加熱是較好的選擇,因?yàn)殡姞t可以控溫,爐氣干凈。若燃?xì)鉅t的爐氣足夠純凈,也可以選擇。 
加熱爐的爐氣以中性至微還原性為宜,應(yīng)避免爐氣在氧化性和還原性之間波動(dòng),加熱火焰不能直接燒向工件。 
HastelloyC-4熱加工: 
Hastelloy C-4的熱加工溫度范圍1080℃~900℃,冷卻方式為水冷或快速冷卻方式。 
為保證佳的防腐性能,熱加工后應(yīng)進(jìn)行固溶熱處理。 
HastelloyC-4冷加工: 
冷加工時(shí)工件應(yīng)為固溶熱處理態(tài),Hastelloy C-4的加工硬化率大于奧氏體不銹鋼,因此需要對(duì)加工設(shè)備進(jìn)行挑選。在冷軋過(guò)程中應(yīng)有中間退火。若冷軋變形量大于15%,則需要對(duì)工件進(jìn)行二次固溶處理。
HastelloyC-4熱處理: 
Hastelloy C-4的固溶處理溫度范圍是1050℃~1100℃。對(duì)于厚度小于1.5mm 的材料,建議冷卻方式為水淬,也可采用快速空冷,以得到抗腐蝕性能。 
在熱處理過(guò)程中,必須保持工件清潔。 
去氧化皮: 
Hastelloy C-4的表面氧化物和焊縫周圍的焊渣的附著性比不銹鋼更強(qiáng),推薦使用細(xì) 
晶砂帶或細(xì)晶砂輪進(jìn)行打磨。 
在用HNO3/HF混合酸進(jìn)行酸洗前必須噴砂或打磨將氧化膜打碎。
機(jī)加工: 
Hastelloy C-4的機(jī)加工要在退火態(tài)進(jìn)行。由于Nicrofer 6616 hMo的加工硬化較高,因此宜采用低切削速度和重進(jìn)刀進(jìn)行加工,才能車入已冷作硬化的表層下面。
Hastelloy C-4焊接: 
Hastelloy C-4能用各種焊接工藝焊接,如鎢電惰性氣體保護(hù)焊、等離子弧焊、手工亞弧焊、金屬惰性氣體保護(hù)焊、熔化惰性氣體保護(hù)焊。優(yōu)先考慮采用脈沖電弧焊。 
焊接前,材料需為退火態(tài),去除氧化皮、油污和各種標(biāo)記印痕,焊縫兩邊約25mm寬范圍需打磨至光亮金屬表面。 
采用低熱量輸入,層間溫度不超過(guò)150℃。 
不需要焊前和焊后熱處理。 
推薦使用的填充金屬 
GTAW/GMAW Nicrofer S 6616
W.-Nr. 2.4611
SG-NiMo16Cr16Ti
AWS A 5.14 ERNiCrMo-7
BS 2901 NA45
AW
W.-Nr. 2.4612
EL-NiMo15Cr15Ti
AWS A 5.11 ENiCrMo-7
采用埋弧焊的堆焊。 
焊帶 Nicrofer B 6616
W.-Nr. 2.4611
UP-NiMo16Cr16Ti
采用以上焊材,可以使碳和硅的析出少。 
若要得到適合的耐腐蝕性,首先考慮氬弧焊GTAW。GTAW和AW時(shí)使用與母材一致的焊材。


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