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耐熱不銹鋼

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SUS 301L

發(fā)布時(shí)間:2020/03/24 點(diǎn)擊量:
SUS 301L
上海圓鼎
 
〓〓〓〓〓〓上海圓鼎歡迎您〓〓〓〓〓〓〓〓
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
一、SUS 301L介紹:
SUS 301L超低碳鋼,比301耐晶間腐蝕性能好。SUS 301L是在301鋼基礎(chǔ)上,降低C含量,改善焊口的抗晶界腐蝕性;通過添加N元素來(lái)彌補(bǔ)含C量降低引起的強(qiáng)度不足,保證鋼的強(qiáng)度。
二、SUS 301L應(yīng)用和特性:
SUS 301L耐熱性能
良好的抗氧化性能可保持到溫度高達(dá)840°C(如果是間歇使用的狀態(tài))及900°C(如果是連續(xù)使用的狀態(tài))。暴露于400°C以上會(huì)造成加工硬化效果的逐漸喪失,800°C時(shí)強(qiáng)度相當(dāng)于退火的301。在蠕變條件下,加工硬化的301強(qiáng)度甚至?xí)陆档降陀谕嘶鸬?01。
SUS 301L典型應(yīng)用:軌道車輛結(jié)構(gòu)部件 -- 滾壓成形、折彎成形或拉伸成形制成型材,也采用板材。飛機(jī)機(jī)身、公路拖車、汽車輪轂蓋、雨刮器夾持器具、烤面包機(jī)彈簧、爐子夾具、屏幕框架、幕墻等。
 
四、SUS 301L化學(xué)成分:
碳C 硅Si 錳Mn 磷P 硫 S 鉻Cr
≤0.030 ≤1.00 ≤2.00 ≤0.045 ≤ 0.030 16-18
鎳Ni 鉬Mo 氮N 銅Cu 鐵Fe 鈮Nb
5-8 ≤0.20 余量
硼B(yǎng) 鈦Ti: 鋁Al 釩 V 鎢W 鈰Ce
~ ~
五、SUS 301L材質(zhì)規(guī)格:
冷扎薄板0.05mm-4.0mm,熱扎板:4mm~14mm,帶2mm-10mm,各尺寸規(guī)格鍛件環(huán)件,庫(kù)存?zhèn)€別牌號(hào)不定尺。
六、SUS 301L物理性能:
熔點(diǎn)/℃ 比熱容
/kg/(kg.k)℃
0-100℃
熱導(dǎo)率/w/(m.k)
100~500℃
線脹系數(shù)
/(10-6/k)
100~500℃
電阻率
/(Ω.mm2/m)
20℃
縱向彈性模量
/GPa
20℃
  0.5 16.3-21.5 16.5-18.7 0.73 193
密度g/cm 硬度HBW 硬度HRB 磁性    
7.93   91 無(wú)    
七、SUS 301L力學(xué)性能:
標(biāo)準(zhǔn)號(hào)產(chǎn)品名稱 狀態(tài) 硬度(不大于) 拉伸強(qiáng)度Σb\MPa
延伸率A/%
斷面收縮Z/%≥
JIS G43003:2012不銹鋼熱軋 固溶處理 207HBW
95HRB
218HV
 
550 45  
       
       
圓鼎小知識(shí)(固溶作用
鋼中合金碳化物的析出與溶解
鋼中C是所含合金元素之一,其除能起到一點(diǎn)強(qiáng)化作用之外,對(duì)耐蝕性是不利的,特別是C與Cr形成碳化物時(shí),作用更壞,應(yīng)力求減少它的存在。為此,依據(jù)C在奧氏體中隨溫度不同而變化的特性,即在高溫時(shí)溶解度大,低溫時(shí)溶解度小。有資料報(bào)導(dǎo),C在奧氏體中的溶解度在1200℃時(shí)為0.34%;1000℃時(shí)為0.18%,而600℃時(shí)為0.02%,室溫時(shí)則更少。所以將鋼加熱到高溫,使C-Cr化合物充分溶解,再快速冷卻,讓其來(lái)不及析出,保證鋼的耐蝕性,特別是耐晶間腐蝕性。
σ
奧氏體鋼如果在500-900℃區(qū)間長(zhǎng)時(shí)間加熱,或鋼中加入Ti、Nb、Mo等元素時(shí),都會(huì)促進(jìn)σ相析出,使鋼增加脆性和降低耐蝕性,消除σ相的手段也是在高于其可能析出溫度使其溶解,再快速冷卻,防止再析出。
 
工藝:
在標(biāo)準(zhǔn)中,推薦加熱溫度范圍較寬:1000~1150℃,通常采用1020-1080℃??紤]具體牌號(hào)成分,是鑄件還是鍛件等情況,在允許范圍內(nèi),適當(dāng)調(diào)節(jié)加熱溫度。加熱溫度低,C-Cr碳化物不能充分溶解,溫度太高,也存在晶粒長(zhǎng)大,降低耐蝕性問題。
 
冷卻方式:應(yīng)以較快速度冷卻,防止碳化物再析出。在我國(guó)及其它一些國(guó)家標(biāo)準(zhǔn)中,標(biāo)明固溶化后“快冷” ,綜合不同文獻(xiàn)資料和實(shí)踐經(jīng)驗(yàn),“快”的尺度可按如下情況掌握:
• 含C量≥0.08%的;含Cr量>22%、Ni量較高的;含C量雖<0.08%,但有效尺寸>3mm的,應(yīng)水冷;
• 含C量<0.08%、尺寸<3mm,可風(fēng)冷;
• 有效尺寸≤0.5mm的可空冷
 
七、SUS 301L加工處理和焊接性能:
SUS 301L所有標(biāo)準(zhǔn)的焊接方法都適用。建議使用308L填充。SUS 301L需要高強(qiáng)度的場(chǎng)合。它的加工硬化率很高, 大約14MPa/%Ra(每1%冷加工減面率,抗拉強(qiáng)度增加14MPa),因此通過冷軋和冷成型可達(dá)到很高的強(qiáng)度。其金相結(jié)構(gòu)中至少有一部分應(yīng)變硬化的奧氏體轉(zhuǎn)變?yōu)轳R氏體。301盡管強(qiáng)度高,但仍有足夠的殘余延展性進(jìn)行大量的冷成形。其退火狀態(tài)下無(wú)磁性,但冷加工后有很強(qiáng)磁性。
SUS 301L可根據(jù)您所需要硬度及寬度交貨,1/2H  3/4H H EH TH等  
如有不盡之處可撥打上海圓鼎熱線詳細(xì)咨詢〓〓
 
 
 

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