Explain the purposes of tempering, Chemistry

Assignment Help:

Explain the Purposes of tempering

Tempering is a heat treatment approach for alloys and metals. In steels, tempering is done to "toughen" the metal by transforming brittle martensite into bainite or a combination of cementite and ferrite. Precipitation hardening alloys, such as numerous grades of aluminum and super alloys, are tempered to precipitate intermetallic particles that strengthen metal.

Brittle  martensite  becomes  strong  and  ductile  after  it  is  tempered.  Carbon  atoms  were trapped  in  the  austenite  when  it  was  rapidly  cooled,  typically  by  water  or  oil  quenching, forming  martensite.  Martensite  becomes  strong  after  being  tempered  as when reheated,  microstructure  can  rearrange  and  the  carbon  atoms  can  diffuse  out  of  distorted BCT structure. After carbon diffuses, result is nearly pure ferrite.

In  metallurgy,  there  is  always  a  trade-off  between  brittleness and  ductility. This delicate balance highlights many of the subtleties inherent to tempering process. Precise control of time and temperature during the tempering process are critical to achieve a metal with well-balanced mechanical properties.

 

 


Related Discussions:- Explain the purposes of tempering

Properties, what are the physical properties of acetic acid?

what are the physical properties of acetic acid?

Topic 9 oxidation-reduction, which quantities are conserved in all oxidatio...

which quantities are conserved in all oxidation-reduction reactions

Determine electron affinity, Q. How to Determine Electron Affinity? An...

Q. How to Determine Electron Affinity? Ans. Electron affinity is the measure of an atom's tendency to form a negative ion. Electron affinity can be measured by the amou

Solution, What will be the mole fraction of 98% pure H2SO4 in 1 liter solut...

What will be the mole fraction of 98% pure H2SO4 in 1 liter solution which has density 1.85gm/ml at ntp?

Sodium and chlorine reacts, When sodium and chlorine reacts then: (1) E...

When sodium and chlorine reacts then: (1) Energy is released and ionic bond is formed (2) Energy is released and a covalent bond is formed (3) Energy is absorbed and ioni

Organic, A crucial step in the Robinson annelation is the elimation of an a...

A crucial step in the Robinson annelation is the elimation of an aldol adduct to form an enone. The elimination of an aldol product can occur in base (it occurs even more readily i

Explain in detail about the thermal oxidation, Explain in detail about the ...

Explain in detail about the thermal oxidation The following reactions take place during thermal oxidation: During oxidation, Si - SiO 2 interface moves into silicon. A

Define the citrus fruits product, Citrus Fruits A large number of con...

Citrus Fruits A large number of constituents in citrus products have been shown to be capable of preventing or alleviating diseases and promoting health. Vitamin C, E, and car

Addition polymerization, Addition polymerization: It involves following th...

Addition polymerization: It involves following three mechanisms: 1.                 Free radical polymerization 2.                 Ionic polymerization mechanism 3.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd