Questions tagged [heat-treatment]

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6
votes
8answers
933 views

Can I weaken a coil spring consisting of spring steel?

I have a steel coil spring that is used by compression. It is too strong, and I would like to reduce its strength by some fraction, ideally keeping its length. Reducing it to roughly half would be ...
0
votes
1answer
34 views

Ductility of Fe-Ni Alloy

Cold worked Fe-Ni rod is very brittle and not suitable for drawing. What would be the best heat treatment parameters for increasing the ductility of a Fe-Ni Alloy? Does increase in the Co content make ...
0
votes
0answers
10 views

Heat press of vinyl on 100% polyester fabric

I want to customise a piece of fabric that is 100% polyester (exclusive of decorations, wash at 30º) with vinyl. My idea is to use a vinyl cutter (such as Silver Bullet) to cut a pattern on the sheet, ...
0
votes
3answers
51 views

small relatively inexpensive crack detection apparatus for bike shops

Is there a relatively inexpensive (let's say under $500US) crack-detection device and related mobile app that would be easy enough for a non-engineer/non-metallurgist to use to determine whether a ...
0
votes
2answers
140 views

Can I keep hardened steel cool with ice while welding?

I would like to weld a piece of hardened steel but i don't want to ruin the treatment on the tip of the piece. Can i put some ice in the middle of the shaft so the heat generated from the welding (...
1
vote
0answers
18 views

Safely evaporate electrolyte from fragile porous substrate

We have porous ceramic platelets of ~50x5x1 mm³ thickness infiltrated with ammonium nitrate solution (NH4NO3). We want to decompose and evaporate it w/o damaging the fragile substrate (decomposition ...
1
vote
3answers
60 views

Heating up Tool Steel with a welder

I'm a newbie of electricity and I would like to know if a piece of tool steel connected to both positive and ground pole of a welder tend to heat up red hot. If yes, at wich amperage? There are some ...
0
votes
2answers
59 views

Room with computer racks, with or without ventilation

I have a room of computer rack that with 2750 watt power needs, which according to this site, I need 9000 BTU/h AC. I'm deciding if I should put a vent in the room or not. When there's a ventilation, ...
3
votes
1answer
784 views

Actual amount of reinforcement gained by adding gusset to welded steel tube construction

This question bothers me for quite a while and is about bicycle frame construction, specifically a BMX frame and even more specifically it's front triangle. It is a heavy duty frame by definition, and ...
1
vote
1answer
47 views

What considerations should I take when flame-hardening a wheel?

I'm currently trying to figure out whether or not we can flame-harden a steel wheel which was supplied with a lower hardness than expected. I'm worried, however, that flame-hardening can either deform ...
0
votes
1answer
114 views

Maximum Carbon content on the surface of Mild Steel that is Pack Carburized

Starting from a piece of Mild Steel that is then Pack Carburized, what's the maximum Carbon content that the surface can soak in? Given that we keep it around less than 1000°C and enough time, is it ...
2
votes
1answer
28 views

Why adding alloy elements in a steel for increasing tempering temperature while keeping the same hardnes and ductility?

What is the advantage of adding alloy elements in a steel in order to increase the tempering temperature while keeping hardness and ductility the same as before? If I wasn't clear enough, I want to ...
1
vote
2answers
670 views

Is hardened steel better than tough steel? [closed]

During the heat treatment process, people use clay to harden the steel in certain areas like the spine. Then they have to go through another process to make the steel tough. I need very hard steel and ...
0
votes
0answers
48 views

If I use clay tempering, can I take a thin piece of steel and make it hard as a very thick piece? [closed]

If I use the forging process of clay tempering, can I take a thinner piece of steel and and make it as strong as a very thick piece of steel? Getting the same strength, without the extra weight?
1
vote
2answers
177 views

Heat Fit Aluminum Sleve onto Shaft

IANAE I want to make an 1/8" steel rotary switch shaft into 1/4" so that it will accept the much more common 1/4" shaft knobs. If I use McMaster-Carr 92510A422: which is an aluminum unthreaded ...
0
votes
1answer
260 views

Aluminium brazing instructions: heat thoroughly to “open the pores” before tinning with rod

I have instructions for using aluminium brazing rod "HTS-2000". It says: Clean the area to be worked with a wire brush. Heat the work surface until it is hot enough to melt the rod. Open the pores ...