High carbon tool steels, Mechanical Engineering

Assignment Help:

High Carbon Tool Steels

Tools are implements such are employed to shape, cut or deform other materials. They are largely made in steel, although other alloys have also been improved. The usual tool steels have C, W, Cr, Mo, V, Mn, and Si in the range of 0.6 to 1.0%. They have hardness and wear resistance. For shock resistance C is limited to 0.5%. W and Mo in between 2 to 18% offer high temperature strength. V in between 0.1 to 2% improves harden-ability whilst Si adds to toughness.

Though the tool and die steels are not generates in as large amount like other steels are, still they are industrially very significant. A variety of steel differing broadly in composition and treatment is utilized for varying reasons. They are employed in such operations as cutting, rolling, shearing and forming. These operations need adequate hardness, toughness, strength wear resistance and heat resistance. For a lot of reasons near-eutecoid and hyper-eutectoid steels have been employed for metal cutting but these plain carbon steels have tendency to lose hardness through tempering while rise in temperature arises during cutting. To overcome such problem high steep tool steel have been improved. The 18.4.1 category of high steel contains 18% W, 4% Cr and 1% V. These steels retain adequate hardness because of carbide formation that is a complex compound Fe4W2C. A tough matrix is provided via Cr. These steel might retain hardness upto a temperature of 500oC.

While 5-12% of cobalt is also added, in addition, the hardness throughout a secondary hardening procedure is increased at temperature around 600oC.


Related Discussions:- High carbon tool steels

Find out the acceleration of the mass centre, Find out the Acceleration of ...

Find out the Acceleration of the mass centre: A wheel of mass 200 kg and a diameter of 700 mm rolls without slipping down a plane inclined at an angle of 20 o with the horizo

I-Section, An unsymmetrical I-Section as shown in figure below. If maximum ...

An unsymmetrical I-Section as shown in figure below. If maximum bending stress is not extend more than 40MPa in the section than find out the moment which it can bear

Calculate thermal efficiency and compression, Calculate thermal efficiency ...

Calculate thermal efficiency and compression: Q: Calculate thermal efficiency and compression ratio for automobile working on otto cycle. If energy generated per cycle is t

Classification-plastics-reinforced plastics and adhesives, Classification ...

Classification Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They becom

Break even analysis, Break even analysis: The costs from Shagun Palace...

Break even analysis: The costs from Shagun Palace, a continental restaurant, are shown below. Fixed costs are Rs. 50,000 per month. Break even analysis is applied as a

Air filter cleaning steps, Air Filter Cleaning :  Air filter filters the a...

Air Filter Cleaning :  Air filter filters the air, which enters into the carburetor. Then, this air mixes with fuel and this mixture enters into engine. If air is not clean, it wi

Determine the coefficient of performance of the cycle, The temperature limi...

The temperature limits of an ammonia refrigerating system are 25 O C and - 10 O C. if the gas is dry at the end of compression, determine the coefficient of performance of the cycl

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