Questions tagged [metallurgy]
Metallurgy is the science of the production and the processing of different metals and other metallurgic usable elements.
175
questions
0
votes
0
answers
28
views
Which one will give better quality to do power compaction between slow press and quick hit?
I would like to do compaction to make small gears. I have seen a lot of videos on Youtube how to do it, mostly by slowly press the metal powder into the mold. But I just have a simple tool, I don't ...
- 219
0
votes
1
answer
36
views
How do I perform a lead of helix cut?
In this old blueprint from 1944, it calls for a lead of helix, 1 turn in .2" on red arrow:
No other info is provided.
This is a top view of the part.
Here's ...
- 127
0
votes
1
answer
44
views
Casting and the pressure of the metal
Background
A gold casting process is explained here:
The casting metal is melted in a special casting machine that is programmed to insert the metal under vacuum into the flask at the right time, ...
- 149
0
votes
0
answers
30
views
Metal casting simulation and the solidification analysis
Casting process analysis
Mold filling affects the quality of a casting. The fluid flow phenomena are closely related to the casting quality and surface finish. The dimensional accuracy of a casting ...
- 149
0
votes
0
answers
37
views
Find dimension of surface arc in blueprint given instructions
I'm trying to find the dimension for the surface arc as shown here as L:
It doesn't provide the dimension directly, instead it says:
...
- 127
0
votes
1
answer
51
views
What does this F symbol means in blueprints?
What does this F (similar to mathematical function symbol) means in blueprints?
Year of blueprint 40s.
- 127
0
votes
1
answer
94
views
Effect of multiple alloying elements on steel's eutectoid properties
Mechanical engineering student here (the professor is not being helpful). When a single alloying element is added to a normal iron-carbon steel, the resulting changes in eutectoid temperature and ...
- 160
2
votes
1
answer
55
views
Find height of cone point in blueprint
In this blueprint I was not able to find where the height of the point of the cone angle should be.
Here's the original blueprints:
http://library.centerofthewest.org/digital/collection/WRAC/id/398/...
- 127
0
votes
0
answers
12
views
What's the right stress relief treatment for AS161 magnesium alloy?
I have a 50 year old forged magnesium alloy wheel apparently marked AS161, which I have been led to believe is AS1.61 - not dissimilar to this picture here. So I assume 1.6% aluminium and 1% silicone ...
0
votes
1
answer
37
views
Is strip casting the same thing as continuous casting?
Web searches are surprisingly ambivalent on this question. In steel production, do strip casting and continuous casting refer to the same process?
0
votes
0
answers
17
views
Spring making machines
There's lots of videos of high-speed spring making machines floating around e.g. YouTube, typically taking wire stock of up to a millimeter or so in diameter and producing items which are clearly ...
0
votes
1
answer
35
views
Determine the temperature required for expanding or bending?
Is there any possible way to calculate the temperature required for a metal to expand or bend with dimensions?
For example, take Mild steel with a length of 100mm, width of 150mm, and thickness of 2....
0
votes
0
answers
8
views
how to create a Ti V simulation cell with virtual cell approximation for density functional theory calculations
I would like to understand the method of creating simulation cells using the virtual cell approximation for different compositions of TiV using vasp
2
votes
0
answers
28
views
What determines the rate of electron discharge machining (EDM) for different materials?
Wire EDM makes no contact with the work piece and disregards hardness.
I am using EDM to cut different materials, and I notice a clear distinction between the rate each material gets cut. For example, ...
- 131
0
votes
0
answers
25
views
What grade of steel best suits this application?
Take a long, thin, straight wire with a circular cross section. Say, .5mm in diameter and 200mm in length. Hold the wire horizontally at one end (cantilever). What grade of steel would result in the ...
- 11
0
votes
0
answers
14
views
How to synthesize alloys or new materials on a small scale?
At the lab scale, alloys or intermetallic compounds are synthesized in an arc melting furnace or by induction melting. The quantity produced is about 5 to 10 grams at minimum. My question is, what if ...
3
votes
1
answer
206
views
How the choice of etchant can affect the severity of hydrogen embrittlement during pickling and passivation?
Following this question, I am trying to understand how/if the choice of acid we might use during the pickling and passivation of certain metals, can influence the severity of hydrogen embrittlement. ...
- 249
0
votes
0
answers
31
views
Does anybody know anything about this patented, late-19th-century process for producing white lead?
I debated on whether to put this question in the History or Engineering Stack Exchange. Ultimately, I decided on the Engineering Stack because I believe the people on this site will understand the ...
- 99
0
votes
0
answers
39
views
How do I measure groove separation?
In this drawing it says that each groove is separated by 5deg. Each groove has a depth of .015", the radius of the contour is 0.47"
How do I measure the separation of each groove?
My sketch ...
- 127
0
votes
0
answers
16
views
What does LM25KD mean?
I did some reasearch. It looks like LM25 refers to a specific aluminum alloy. I think the KD refers to something about how it is finished.
The context is this sentence describing the wheels of one of ...
- 99
0
votes
0
answers
36
views
What Formula can be used to plot a relation between stress and strain?
Suppose a question starts by pointing that a cylindrical sample of a certain metal (in my case it is brass alloy) was put under a load. This piece has an initial diameter and length of 1.263cm and 5cm ...
- 1
0
votes
1
answer
55
views
What is the metallic alloy used in camera cases?
What is the metallic alloy used in camera cases?
They are manufatured by what process?
- 103
8
votes
1
answer
2k
views
Why does faster cooling produce smaller grains?
I've learned that in general steel and other metals tend to have smaller grains when cooled quickly and larger grains when cooled slowly and that at higher temperatures, the grain size grows even if ...
- 89
0
votes
0
answers
52
views
Corrosion of Ice Auger Blades
I am wondering about corrosion of the steel blades on my ice fishing auger. The auger is used on fresh water lakes (ie no salt involved). I have traditionally brought the auger inside to melt the ice ...
0
votes
0
answers
52
views
Grain size and fatigue performance correlation for AMS 5662 Inconel 718
I am trying to do a literature review on the correlation between average grain size and fatigue performance of AMS 5662 (solution annealed condition) Inconel 718. The Special Materials Corporation ...
- 249
0
votes
2
answers
59
views
Will hundreds of wood-burning fires damage 1/2" thick steel? [closed]
I have 1/2" and 3/8" thick x 24" diameter steel pipes that are typically used for natural gas transport, but in my case they take the shape of horizontal wood-burning cookers. I am ...
- 101
0
votes
1
answer
66
views
Longer lasting soldering tips
I'm a real thrifty guy, so seeing my soldering tip with months of use on them starting to crack & peel, the layer I take to be nickel cladding, disheartens me. Again, this is planned obsolescence ...
- 101
2
votes
1
answer
96
views
Why 95% Water is used Instead of 100%
So in this video(https://www.youtube.com/watch?v=v1z829NF9PA) at around 2:35 it says that the alluminium ingots for alluminium foil, after being heated, are cooled down with a mixture of 95% water, 5% ...
0
votes
2
answers
67
views
Metallurgy: Purifying Cobalt-Nickel-Copper alloys to Cobalt, Nickel, Copper
I am working on lithium battery recycling modelling. Long story short after certain processes I get as output alloys with different compositions of Cobalt, Nickel and Copper. An example of an alloy is ...
- 1
0
votes
1
answer
108
views
What is the difference between an alloy and a metamaterial?
Metamaterials are carefully structured materials — often consisting of periodically arranged building blocks — that exhibit properties and functionalities that differ from and surpass those of their ...
- 1
0
votes
2
answers
55
views
Building up worn steel via plating or other method?
I've asked several people and gotten mixed answers, so I've decided to post the question here. Can steel be electroplated onto steel to build up worn surface areas (I'm talking about less than a ...
- 41
1
vote
2
answers
199
views
Consumable arc welding Polarity Effect on heat input
why DCEP is generally used in consumable welding process?
As per my understanding more heat is generated where the electrons collide(anode),
so in consumable welding,we want deposition and also want ...
0
votes
1
answer
91
views
Iridium carbides in high carbon stainless steel
Has there ever been any high carbon stainless steel made with iridium as one of the alloy components? Is there any research in this direction?
There is a paper from 2016 comparing various iridium ...
- 1
0
votes
0
answers
16
views
For a given a molten metal (say copper), how do you determine the best material for a 3D printer flatbed? What about circuit board?
Suppose we had a 3D printer that can spew molten metal out of a 0.1mm hot nozzle and that we can control the heat at the last 5mm of the Tungsten hot nozzle's tip.
I'm wondering then how would you get ...
- 423
1
vote
1
answer
72
views
Why do rare-earth permanent magnets need to be recycled instead of just reused?
For years, scientists and engineers have struggled to find ways to efficiently break down and recycle rare-earth materials from various devices, especially permanent magnets....
My question is: Why do ...
- 111
2
votes
2
answers
83
views
Best way to prepare a rusty metal surface for hardness testing?
I have a hardox #10mm plate that needs to be tested on Rockwell hardness.
As hardox is sensible to heat I would like to avoid any heat treatment before the testing.
The plate has been water cut.
The ...
- 137
2
votes
1
answer
126
views
Can diamond grinding wheels be used to grind Tantung (non-ferrous High Cobalt, Chromium, Tungsten alloys?)
I've read that when using diamond wheels to grind ferrous metals, at high temperatures the carbon in the diamond becomes soluble in the iron thus damaging the diamond wheel.
Is it okay to use a ...
- 5,237
9
votes
4
answers
4k
views
1
vote
1
answer
50
views
Under what conditions is grinding unnecessary for liquid-solid leaching in mineral processing?
I am a chemical engineering student and I am having trouble understanding a passage in a separation process textbook I am reading. The passage is about the preparing solids for leaching, such as ...
- 13
2
votes
0
answers
205
views
What is the Specific Heat of Molten Bronze?
I have sources giving the specific heat capacity of bronze as 382 to 385 J⋅kg⁻¹⋅K⁻¹, or as 435 J⋅kg⁻¹⋅K⁻¹. I'm assuming the variation is due to different alloys being considered, which are not ...
- 121
13
votes
4
answers
6k
views
How can I tell if I got counterfeit aluminum?
I recently received an order of extruded aluminum strip 3/32" thick that supposed to be 6061 hardened to specification ASTM B221. However, when we tried to bend it, it broke and the interior ...
- 1,625
2
votes
1
answer
81
views
Outline of Various Heat Treatment Processes
I've been trying to sort out some of the heat treatment terms for steel and what they actually mean since there seems to be a lot of interchangeable usage between the two. This is what I have so far. ...
- 5,237
0
votes
3
answers
262
views
How long will it take to anneal at a lower temperature?
Someone is trying to anneal a brass casting to minimize the segregation of Zinc. He likes the results of annealing at 400 Celsius for 3 hours, but the high temperature produces problems with residual ...
- 11
3
votes
3
answers
91
views
How do I calculate the Cr concentration in an Fe-C-Cr alloy?
Say, I have a 0.1 % C and 18 % Cr in a Fe-alloy. At a particular temperature, we have precipitate formation (of Cr23C6), which requires many Cr atoms. At a given temperature , how do I evaluate the ...
- 151
2
votes
1
answer
65
views
Metal sheet forming - material properties when switching material
What does one have to look out in material properties when changing material grade in cold sheet forming operation (example: from DC04 to DC03 or to DC01). Operation is mostly made of 90°bends and ...
- 41
2
votes
0
answers
39
views
Springback in carbon/HSLA steel - cold forming
What are the measurements denoted on top of the YS-t steel lines? Material thickness or bend radius?
...
- 41
0
votes
2
answers
89
views
In what way does plating a bimetallic strip affect its displacement?
I've got a mechanism that uses a bimetallic strip; for aesthetic reasons I'd like to electroplate it with a thin layer of gold - how does this affect the relative displacement of a bimetallic strip in ...
- 113
4
votes
3
answers
1k
views
Is there a maximum life for things made out of stainless steel or cast iron?
Do steel objects have a maximum lifespan? I read that "316 stainless steel is estimated to last for 1200 years in a “rule“ environment before heavy pitting. In the marine environment this is ...
- 41
1
vote
0
answers
59
views
Strange old smithing machine, what is it purpose?
Is anyone familiar with such thing?
I suppose that is something used in forge. I don't have better photos, but "steering wheel" was placed on shaft with small gear and this small gear is ...
- 133
3
votes
0
answers
1k
views
How do I EXACTLY calculate the k-factor for metal bending?
Introduction
I've recently started to work with metals and the process of bending them. There is a lot more math involved than I initially thought. All the break press operators just have a ...
- 31