鎳鉻絲
鎳鉻絲具有較高的電阻率，表面抗氧化性好，并且在高溫下有較高的強度，有良好的加工性能及可焊性，可廣泛應用于冶金、家用電器、機械制造業等做發熱元件和電器行業做電阻材料。
Nichrome wire has high surface resistivity, good oxidation resistance, and high strength at high temperatures, has good processing properties and weldability, and can be widely used in metallurgy, household appliances, machinery manufacturing, the heating element and the electric appliance industry.
鎳鉻電熱合金主要性能
 Main performance of Ni-Cr electric heating alloys
|
|
Cr20Ni80
|
Cr30Ni70
|
Cr15Ni60
|
Cr20Ni35
|
Cr20Ni30
|
|
主要化學成分(%)
Main Chemical Composition (%)
|
Ni
|
余量
Rest
|
余量
Rest
|
55.0-61.0
|
34.0-37.0
|
30.0-34.0
|
|
Cr
|
20.0-23.0
|
28.0-31.0
|
15.0-18.0
|
18.0-21.0
|
18.0-21.0
|
|
Fe
|
≤1.0
|
≤1.0
|
余量
Rest
|
余量
Rest
|
余量
Rest
|
|
元件最高使用溫度(℃)
Max.continuous service temperature(℃)
|
1200
|
1100
|
1000
|
1000
|
1000
|
|
電阻率(µΩ.m)20℃
Resistivity(µΩ.m)20℃
|
1.09±0.05
|
1.18±0.05
|
1.11±0.05
|
1.04±0.05
|
1.04±0.05
|
|
密度(g/cm3)
Density(g/cm3)
|
8.40
|
8.10
|
8.20
|
7.90
|
7.90
|
|
導熱系數（KJ/m.h℃）
Thermal conductivity（KJ/m.h℃）
|
60.3
|
45.2
|
45.2
|
43.8
|
43.8
|
|
線脹系數(α×10-6/℃)
Coefficient of lines expansion(α×10-6/℃)
|
18.0
|
17.0
|
17.0
|
19.0
|
19.0
|
|
熔點約值
Melting point（approx.）(℃)
|
1400
|
1380
|
1390
|
1390
|
1390
|
|
延伸率%
Elogation at rupture
|
≥20
|
≥20
|
≥20
|
≥20
|
≥20
|
|
比熱(J/g℃)
specific heat(J/g℃)
|
60.3
|
45.2
|
45.2
|
43.8
|
43.8
|
|
顯微組織
Micrographic structure
|
奧氏體
austenite
|
奧氏體
austenite
|
奧氏體
austenite
|
奧氏體
austenite
|
奧氏體
austenite
|
|
磁性
Magnetic properties
|
非磁性
nonmagnetic
|
非磁性
nonmagnetic
|
非磁性
nonmagnetic
|
弱磁性
Weak magnetic
|
弱磁性
Weak
maggnetic
|
|
