Heating a small steel plate to high temperature

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Discussion Overview

The discussion revolves around methods to heat a small stainless steel plate (50x50x10mm, AISI 304) to a temperature of 900ºC (1652ºF) while it remains fixed in place. Participants explore various heating techniques, considering both practical and theoretical implications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Vince seeks a cost-effective method to heat a stainless steel plate to high temperatures, mentioning that induction heaters are too expensive.
  • One participant suggests using a torch as a potential heating method.
  • Vince expresses concern that using a torch may lead to non-uniform heating, which could damage embedded thermocouples.
  • Another participant emphasizes the need for more details about Vince's setup to provide relevant suggestions.
  • It is noted that reaching 900ºC is challenging with typical methods like oil baths, and a torch may be the best option if used within an enclosure for more uniform heating.
  • A participant shares an experience of using halogen car headlight bulbs to heat a small metal object to approximately 1000ºC, suggesting that a similar approach might work if heat losses are minimized.
  • Another idea proposed is to create a "black body" enclosure around the plate and heat it externally with a torch to achieve uniform heating through internal radiation.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best method to heat the plate, with multiple competing views on the effectiveness and practicality of different heating techniques remaining unresolved.

Contextual Notes

Participants highlight limitations in the discussion, such as the lack of detailed information about Vince's setup and the challenges associated with achieving high temperatures uniformly.

vipke
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Hello,

For my setup I'm looking for a method to heat a small stainless steel plate (50x50x10mm(2x2x0.4 inches), AISI 304) to 900ºC (1652ºF). The plate is fixed onto the frame, so it can't be removed.

I've found some induction heaters, but they were all too expensive. Anyone got some suggestion for my problem?

Thanks,
Vince
 
Last edited:
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How about a torch?
 
Haven't really thought about a torch yet, but i think a torch will heat up the plate in non uniform way creating points with high temperature, damaging the thermocouples embedded in the plate. But it's worth a try, thanks!
 
See, if you don't describe your entire setup in detail, we don't know what you are trying to accomplish.
 
The temperature is too high to reach with the usual oil bath or similar, you are asking for cherry red steel.
A torch is probably your best bet, encase the apparatus in an enclosure to get more uniform temperature.
As SteamKing has noted, it is difficult to be relevant without a better idea of your goals.
 
We built a test rig that heated a small metal object to aboot 1000C using the radiation from halogen car headlight bulbs. The bulbs have a built-in mirror to produce a narrow beam, and the filament temperature is higher than 1000C by a useful margin. The objects we were heating were smaller than your plate, but if you can limit the heat losses you might get something similar to work.

Or, make a "black body" enclosure around the plate, heat it with a torch from the outside, and let the internal radiation heat the plate uniformly.
 

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