| Tungsten heavy alloys |
|
|
|
|
|
| Tungsten base high density alloy popularly exhibit into Ni-Fe series and Ni-Cu series.Tungsten as the main element with weight percent from 90-97,is liquidly sintered with the binder matrix Ni,Fe or Cu and form the heaviest and ductile materials.After the thermal mechanical processing by swaging and aging,the sintered Tungsten base alloy result in enhancive strength and hardness inside.This alloy performs an excellent and unique property combination:hign density,high strength,high ducility,good corrosion resistance,good radiation resistance,low thermal expansion,high thermal and electrical conductivity. |
|
|
|
|
|
| Properties of W base high density alloys |
|
|
|
|
Type |
90-7-3 |
91-6-3 |
92-5-3 |
93-4-3 |
95-3-2 |
96-3-1 |
97-2-1 |
|
Composition Wt% |
7Ni3Fe |
6Ni3Fe |
5Ni3Fe |
4Ni3Fe |
3Ni2Fe |
3Ni1Fe |
2Ni1Fe |
|
Density g/cm3 (+/-0.15) |
17.1 |
17.25 |
17.5 |
17.6 |
18.1 |
18.3 |
18.5 |
|
Tensile strength Mpa |
900-1000 |
1150-1250 |
1150-1250 |
1150-1250 |
1150-1300 |
1150-1300 |
1200-1300 |
|
Elongation % |
18-29 |
8-18 |
8-18 |
7-18 |
6-12 |
3-8 |
2-7 |
|
Hardness HRC |
24-28 |
25-33 |
35-45 |
35-45 |
37-47 |
37-47 |
37-47 |
|
Impact toughness J/cm2 |
30 |
30 |
30 |
30 |
10 |
10 |
7 |
|
Yield strength Mpa |
850-950 |
900-1100 |
900-1100 |
900-1100 |
850-1050 |
800-1050 |
750-1050 |
|
AMS-T-21014 CLASS |
Class-1 |
Class-1 |
Class-2 |
Class-2 |
Class-3 |
Class-3 |
Class-4 |
|
| Application of Tungsten heavy alloys: |
|
|
|
|
| A.Radiation shield,like X-ray and γ-radiation shield,syrine & vial shield, isotope container, nuclear shield etc. |
|
| B.Balance parts,like tungsten boring bars in oil field, yacht, sailboat, submarine, racing cars,darts etc. |
|
| C.Weight distribution,golf head,reamer shank,fish drop,aviation gyroscopes, etc. |
| D.High temperature contactors,dies,filling rods,electrode of EDM and ECM, etc. |
| E.Banlance balls for missile and plane,Shrapnel head,core of armourpiercing bullet etc. | |
| | | |