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HOW TO AVOID STEEL HEAT TREATMENT PROBLEMS -INR 0

Publish Date: 14-09-2017 03:13:38 | Contact name: annu | Location: INDIA | Place: Corporate Office & Works K.K. METALS PRIVATE LIMITED SP-1192 (G), Phase-IV, Industrial Area, Bhiwadi -301019, Rajasthan, | 39 times displayed |

It is not uncommon for one to experience problems after heat treating metals. Although it is one of
the last stages during the manufacturing process, it is no less important. When
done properly, heat treatment can alter the mechanical and physical properties
of metals without changing their shape. When done wrong, the results are less
than desirable. You want to ensure that the material is high-quality by avoiding
steel heat treatment problems. Here is some information on common heat
treatment problems and how to avoid them.





OVERHEATING
AND BURNING:





Low alloy metals and decarburization can cause overheating and
burning. Temperatures higher than 1200 °C destroys steel and other low alloy
metals. Some deterioration in mechanical properties can occur if the heat
treatment is administered prior to forging and other mechanical processes.



BRITTLENESS:





Brittleness is another problem. Applying too much heat causes
this problem. To correct brittleness issues, it may be necessary to temper the
metal for a shorter length of time and to lower the hardening temperature. You
can correct brittleness by increasing the hardening temperature and time if the
problem is causing improper tempering and too much hardness.





WRONG
TYPE OF METAL:





Not all alloys are suitable for heat treatment. The wrong alloys
create metal that doesn’t have sufficient impact strength. Bear in mind that
many factors can affect the impact strength of metal, but not as much as the
number and type of impurities it contains, its surface condition and if any
thermal and mechanical treatments were administered.





WARPING
AND DEFORMATION:





Normalize treated metal prior to heat treating, to avoid warping.
An even temperature and sufficient time are necessary. Maintain the furnace
temperature throughout the entire treatment process. Proper stabilization
of the metal to prevent movement during the quenching process can also help to
prevent warping. It is important to time each step. The right temperatures are
achieved when you time each step.





UNEVEN
HARDNESS:





Uneven hardness is a common problem, which occurs when steam
bubbles form during the cooling process, there is too much carbon on the tools
and the metal’s surface was not sufficiently cleaned before treatment





COOLING
FRACTURES:





Cooling fractures are very common when there is uneven heating,
rapid cool down and overheating. It is possible for fractures to occur during
the quenching process prior to tempering, resulting in incomplete
transformation. Common causes include cold tools and residual austenite. Tempering the metal right after the
hardening process and completing the transformation with treatment can help
prevent cooling fractures.



Prevent steel heat
treatment problems
by using these techniques: vacuum
furnaces, proper hardening, quenching, tempering and molten salts.





Conclusion:





K.K. Metals is the forging manufacturing division of K.K. GROUP working with commercial clients in many
industries. Our mission is to perform high-quality precision controlled heat
treating to maximize productivity and lower manufacturing costs. .We at K.K. Metals have Complete in-house setup for CAD-Die
Development, Cutting, Press & Hammer Forging, Heat Treatment, machining, etc. We specialize in Closed
Die Forging and consistently benchmark good quality standards and
processes. For more information visit www.kkmetals.com



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