Silver Tungsten points to Produce Electric Locomotives Regulating Switch

Silver tungsten points to produce electric locomotives regulating switch:

Firstly, batching and mixing tungsten powder, silver powder and a small amount of nickel powder;
Secondly, to form porous skeleton, you should press the mixing powder;
Thirdly, you should stack the porous skeleton and the infiltration silver pieces, and place them in tungsten boat;
Finally, to make the molten silver infiltrated into porous skeleton pores completely, you should carry out infiltration sintering; and you can get the product-silver tungsten points after cooling. Sintering conditions: under the protection atmosphere, you should putt them in the furnace of molybdenum wire, and the infiltration sintering temperature is higher than the melting point of silver.

Using silver tungsten as raw material to produce electric locomotives regulating switch by infiltration processes:

Batching (tungsten powder (70%), silver powder, nickel powder) → Mixing powder(silver powder, tungsten powder(70%),nickelpowder) → Pressing → Semi-inspection,infiltration+hydrogen → sintering → Checking → Cleaning → Packing → Silver tungsten points



 

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