Hydrogen intermediate frequency induction sintering furnace

A, overview of hydrogen intermediate frequency induction sintering furnace

1 , the hydrogen medium frequency induction sintering furnace Name: hydrogen medium frequency induction sintering furnace

2. Application of hydrogen intermediate frequency induction sintering furnace : used for sintering tungsten plate (rod) billet

3 , the hydrogen medium frequency induction sintering furnace general requirements: the hydrogen medium frequency induction sintering furnace is necessary to ensure safe, reliable, and reasonable design, practical, easy operation and maintenance

B. Selection of technical parameters of hydrogen intermediate frequency induction sintering furnace

1 , a sintered material: tungsten

2 , the working temperature:      2 30 0 deg.] C (heat 8H )

3 , temperature accuracy:      ± deg.] C. 1

4 , the temperature uniformity: in Ф380 × 700 within a range of ± 15 deg.] C (acceptance criteria: average temperature in the range of area, on the middle of each sample was placed in a sintered density of each sample was detected, the deviation is not greater than 0.2g / cm3 )

5 , Tungsten Crucible Size:    Ф450 (inner diameter) × . 8 50 (high) × 16 (thickness) mm

6 , a single furnace sintering quantity:    200Kg

7 , pre-vacuum degree:    10 Pa

8. Pre-vacuum time: less than 30 minutes when the furnace is empty

9 , temperature control: heating automatic, manual operation may be

10 , out of the feeding method :    using a charge

11 , working system: three shifts of continuous

12 , heating power capacity: high temperature section 2 0 0 deg.] C / H

13. Tank temperature: less than 50 ℃

C , the hydrogen medium frequency induction sintering furnace technical requirements

1 , the induction coil

Use oxygen-free copper tube to wind after annealing, spray epoxy resin for insulation treatment , and provide hydrostatic test report

2. Crucible

Using Ф450× 8 50×16mm tungsten crucible ,

3. Insulation materials

High-purity zirconia and high-purity alumina bricks, insulation bricks using 40mm zirconia, 30mm alumina, and 70mm zirconia at the bottom can ensure normal use at the highest working temperature and provide a certificate of conformity.

4 , the hydrogen medium frequency induction sintering furnace color: orange gantry use, tank with yellowish, gray electrical part by computer.

5 , the temperature control

( 1 ) Thermometer:   Use tungsten rhenium thermocouple below  1200 ℃    Use dual colorimetric mrisc1000~3000 optical pyrometer above 1200 ℃ , automatic conversion to temperature

( 2 ) Temperature controller:   FP23 temperature controller

( 3 ) Temperature and vacuum record: paperless recorder

6 , really empty units

( 1 ) Mechanical pump : 2x-70 type rotary vane pump

( 2 ) Solenoid valve : ddc-tq80 solenoid with inflation valve

( 3 ) Metal vacuum gauge, low vacuum gauge :

7 , electric air control system :

( 1 ) The power supply has over-current and over-voltage protection , and the control panel adopts the fifth-generation dynamic control panel.

( 2 ) SCR and comes with half a set of spare parts

8 , furnace:

( 1 ) The inner wall of the furnace is made of 304 stainless steel , the thickness is 8mm ; the outer wall is made of 35# steel, the thickness is 10mm , and it is water-cooled. ( 2 ) The observation hole is easy to clean

( 3 ) Manual hydraulic lifting and manual rotation of furnace cover ( self-locking during work )

( 4 ) The furnace body has explosion-proof measures (spring type)

9. Cooling system :

The main cooling portion (SCR, inductor, capacitor ) , and return each branch temperature , pressure monitoring test , once the failure is automatically power off

10. Natural backwater is adopted as the backwater method

D, composition of hydrogen intermediate frequency induction sintering furnace