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99.95 polishing Tungsten Price Kg Tungsten Round Bars Price

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תיאור

99.95 polishing Tungsten Price Kg Tungsten Round Bars Price

תיאור מוצר
Tungsten bar/rod is mainly used to found ingredient of material, cutter and heads, tungsten wire for lights instruments, electric contact points and conductor of heat, crankshaft and cylinder barrel of advanced automobile, ingredient of kinds of heat-resistant steel. Also used for making special steels, to make guns, artillery rockets, satellite airplane and ship. Tungsten bars have a luster rather like that of silver in uniform color. Though the whole tungsten bars may slightly curve, the maximum height of the bend should not be more than 7mm. The most popular application of tungsten bar is in steel making industry. Tungsten bars are used to improve the property of steel.

Tungsten bar with impurities is used to procedure bulb filaments or electron tube filaments, which are guaranteed to have remarkable resistance to high temperature.

Porous Tungsten as a high current density cathode is one of the important applications of the metal, which is mostly used in high temperature conditions due to its exceptional resistance to melting (T-m = -3410 +/- 20 degrees C).

Its porous form has been a crucial component of dispenser cathodes used in electronic valves and high power lamps. Porous tungsten skeleton forms the matrix. which is then impregnated with an electron emissive compound. Upon every emission front the surface, new material has to be fed into the surface pores via the open pore channels. Hence it may be proposed that a uniform porosity is needed for a better performance. למרות זאת, a controlled porosity has not been achieved yet.

Moreover, sintering of tungsten has always been difficult due to the extreme process conditions. A high sintering temperature (T-s >= 2000 degrees C) and a strong reductive atmosphere (hydrogen) have been the absolute necessity in making these parts. This study further explores an alternative sintering technique being developed. The idea is based on the reactive sintering concept. The energy output from the exothermic reactive system of tungsten oxide and aluminium has been the heat source for sintering porous tungsten. As a result, sintering temperature and time have been reduced considerably. Higher homogeneity, thus more uniform pore distribution, was observed.

A better control of porosity related to the pressing and sintering conditions was achieved by the characterisation method previously developed. Microhardness has been a useful monitor of the scatter in porosity of the parts. Throughout the study, SEM was used to observe the porous Structures and powder morphologies. DSC and XRD were useful to follow the microstructural evolution in the reactive system.

products
99.95 polishing Tungsten Price Kg Tungsten Round Bars Price
טוֹהַר
≥99.95%
טֶכנוֹלוֹגִיָה
Powder Sintering
חוֹמֶר
W1,W2
Surface Treatment
Grinding
מֵמַד (מ"מ)
מ 3.0 ~ 12 מ"מ אורך 800 mm-1000mm
Total Porosity
40% מקסימום.
יישום
electrodes in the field of rare earth metal industry
Chemical Composition
Tungsten
Fe
Ca
פ
Sn
Al
Ni
נ
Sb
W1
0.001
0.001
0.001
0.0001
0.0001
0.00035
0.002
0.0001
Balance
Bi
Mo
Mg
ג
Si
O
Pb
As
99.95%
0.0001
0.0008
0.0001
0.00085
0.001
0.0047
0.0001
0.0001
Finished Form
Specified Diameter (מ"מ)
Min.Length (מ"מ)
Diameter Tplerance

Wroughted

2.8≤d<5.0
600

+/-2%

5.0≤d<6.5
300
6.5≤d<11.0
200

Straightened

0.8≤d<1.0
1000

+/-2%
1.0≤d<3.0
800

Ground

0.8≤d<3.0
800~1000
+/-0.03 מ"מ
3.0≤d<6.5
300~600
+/-0.03 מ"מ
6.5≤d<10.0
200
+/-0.03 מ"מ
יישום

Suitable for producing ion implantation parts;

For producing electric light source parts and electric vacuum components;

For producing heating elements and refractory parts in high temperature furnaces;

Used as electrodes in the field of rare earth metal industry.

יתרונות:
1.High density.
2.Good mach-inability.
3.Good mechanical properties.
4.High Modulus of elasticity.
5.High absorption capacity against x-rays and y-rays.
6.Harmless and environment friendly.

The Related products

מִשׂרָד

מפעל

סדנה

smelting furnace

אֲרִיזָה & מְסִירָה

Packing Details : soft paper inside with wooden case outside

Delivery Details : 10-15 ימי עבודה

Our Certifications

Our R&D center

We have five engineers,engaged in researching the usage of nitinol shape memory alloy products ,especially in medical and aerospace areas.

Senior Engineer

Mr. Deng

Customer Photo

The exclusive supplier contract

Joe is from US.He is the scientist of nitinol.He signed the exclusive supplier contract with us after his visiting !

עַכשָׁיו,he is one of our big customers !
He sells our products to US market!

Customers from HK &Korea

We become their long-term relationship supplier for nitinol flat wire and springs!

Thanks a lot the support and trust from all our customers!

We will keep improve to make you satisfied forever!

Our customers spread over North America, דרום אמריקה, אֵירוֹפָּה, Southeast Asia etc.

MEDTRONIC VISITED OUR FACTORY

שאלות נפוצות

ש: האם אתה חברת מסחר או יצרן ?

א: אנחנו מפעל.

ש: כמה זמן זמן האספקה ​​שלך?

א: באופן כללי זה כן 5-10 ימים אם הסחורה במלאי. או שזה כן 15-20 ימים אם הסחורה אינה במלאי, זה לפי כמות.

ש: האם אתה מספק דוגמאות ? האם זה בחינם או נוסף ?

א: כן, אנחנו יכולים להציע את המדגם בתשלום חינם אבל לא משלמים את עלות ההובלה.

ש: מה תנאי התשלום שלך ?

א: תַשְׁלוּם<=1000USD, 100% in advance. תַשְׁלוּם>=1000USD, 30% T/T מראש ,balance before shippment.
If you have another question, pls feel free to contact us as below:

מידע נוסף

איזור מוצא:

Shaanxi, חרסינה

שם מותג:

seabird

מספר דגם:

seabird-007

גודל:

dia1mm-12mm

צֶבַע:

ground surface and polishing

תְעוּדָה:

ISO9001:2015 Rosh

Technique:

Sintering

טמפרטורת פעולה:

≤ 2500 Deg. Celsius

טוֹהַר:

W1 – 99.95%

יישום:

Thermionic Emission Cathodes

Porosity:

30%

צְפִיפוּת:

18.0-18.2 G/cm3

products:

99.95 polishing Tungsten Price Kg Tungsten Round Bars Price