online grocery store in noida.ppt

8/9/2019 Online grocery store in Noida.ppt

1/19

Ration Home Delivery | Online Grocery Store inNoida

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2/19

Mr. Pullom

SWHS 2!"2#

$denti%yin& Metal' and (heirPro)ertie'

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3/19

O*+ective',. $denti%y and e-)lain the term' a''ociated

ith metal'.

2. De'cri*e the )ro)ertie' and 'tructure' o%metal'.

/. 0-)lain ho 'teel i' manu%actured.

1. De'cri*e ho metal i' cla''ied.

3. De'cri*e the characteri'tic' u'ed to

identi%y metal'.

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O*+. ,

Becau'e o% the ide')read u'e and nece''ity %ormetal' in a&riculture7 it i' im)ortant %or the or8erto have a *a'ic under'tandin& o% metal' andmetallur&y hen %a*ricatin& and ma8in& re)air' onmetal'.

Metal i' an element. Over , 8non elemet'. 93metal'

4n alloy is a mixture of two or more metals, orof metals and one or more non-metals.

High temperature creep is the slow stretchingof steel under stress at high temperatures.

Adhesion is the sticking together of two unlikemetals involving a mechanical bond.

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6/19

O*+. , 5ontinuedAnnealing is the softening of metal and

removing of the brittleness.

Tempering is obtaining the desired hardnessand toughness in metal.

(he )roce'' o% ma8in& 'teel harder i' 8non a'hardening.

Hardness is the ability of a material to resistbeing indented.

Casting is pouring melted metal into a mold so

that it will be a certain shape after cooling.(he ca)a*ility o% *ein& e-tended or 'ha)ed *y *ein&

*eaten ith a hammer or *y *ein& )re''ed *y roller'i' 8non a' malleable.

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O*+. 2(he di'tinct characteri'tic' u'ed to hel) identi%y a &iven metal are

re%erred to a' it' )ro)ertie'. 4. (he'e characteri'tic' include: *rittlene''7 color7 corro'ion re'i'tance7

ductility7 mallea*ility7 and 'tren&th. B. (he'e )ro)ertie' can *e cate&ori;ed into 'even *road cla''ication'. ,. Mechanical )ro)ertie' are hardne''7 *rittlene''7 ductility7 )ercent

elon&ation7 tou&hne''7 ear7 and 'tren&th. a. Tensile strength is the ability of a metal to resist being

pulled apart. *. Compressive strength is the ability of a metal to resist

deformation by forces )u'hin& it to&ether. c. hear strength is the ability of a metal to resist forces acting

in opposite directions.

d. !atigue strength is the ability of a metal to take repeatedloads without deforming.

e. "mpact strength is the ability of a metal to resist shock. %. !lexure strength is the ability of a metal to bend without

deforming or breaking.

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5hemical )ro)ertie' re%er to the chemical ma8e"u)o% the metal and it' a*ility to re'i't reaction iththe environment.

a. 5hemical )ro)ertie' are o-ide or com)oundcom)o'ition< acidity or al8alinity o% the metalculty ith hich they are or8ed hen cold.*. 0-am)le': iron7 moly*denum7 chromium7 tun&'ten7 and

vanadium at room tem)erature.2. (he %ace"centered cu*e arran&ement ha' %ourteen

atom'.a. (he main characteri'tic i' that they are )la'tic and

mallea*le.*. 0-am)le': iron7 aluminum7 nic8el7 co))er7 lead7

)latinum7 and 'ilver./. (he clo'e")ac8ed he-a&on arran&ement ha' 'eventeen

atom'.a. (he main characteri'tic' are that they are non")la'tic

and mu't *e heated *e%ore they can *e or8ed.*. 0-am)le': cadmium7 co*alt7 *i'muth7 ma&ne'ium7

titanium7 and ;inc.

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12/19

O*+. /teel is an alloy of iron and carbon and

usually other metals.

1 ma+or 'teel ma8in& )roce''e'the Be''emer %urnace7 the o)en hearth

%urnace7 electric %urnace7 and the o-y&en%urnace

to &eneral ty)e' o% 'teel: car*on and alloy

(he 'tren&th o% 'teel increa'e' a' thecar*on content increa'e'7 *ut the hardne''7*rittlene''7 and di>culty o% %a*rication al'oincrea'e.

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,. 5hromium ma8e' the alloy hard and increa'e' the earand corro'ion re'i'tance o% 'teel. Steel' containin& morethan 1 )ercent chromium are called 'tainle'' 'teel'.

2. Sul%ur i' added to aid in machina*ility o% the 'teel./. Silicon i' added to im)rove the electrical7 mechanical7

and thermal characteri'tic'.1. Nic8el i' added to increa'e the tou&hne'' and 'tren&th.3. ?anadium i' added to increa'e the 'tren&th.@. (un&'ten i' u'ed to )roduce tool 'teel' that ill

maintain a cuttin& ed&e at hi&h heat.9. 4luminum hel)' to )rovide a hardened 'ur%ace.!. Moly*denum tend' to increa'e the hardne'' and the

endurance limit' o% 'teel.#. O-y&en %orm' iron o-ide hich i' not de'ira*le.

,. Pho')horu' i' %ound in all 'teel'. When )re'ent in hi&h)ercenta&e' it i' con'idered an im)urity. 4t lo)ercenta&e' it im)rove' machina*ility.

,,. 5ar*on added to iron chan&e' the )hy'ical )ro)ertie'.(he amount o% chan&e i' directly )ro)ortional to theamount o% car*on added to the iron

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14/19

O*+. 1O% the 8non element'7 a*out ! to # are technically

con'idered metal'.6errou' metal'AMetal' ho'e chie% in&redient i' iron. Pi& iron7ca't iron7 rou&ht iron7 and 'teel are e-am)le'.

Non"%errou' metal' are tho'e hich have no iron and are madeu) o% a 'in&le element. (he'e are aluminum7 co))er7 lead7ma&ne'ium7 nic8el7 tin7 tun&'ten7 ;inc7 'ilver7 and &old.

6errou' alloy' are metal' made u) lar&ely o% %errou' material'*ut havin& other element' in 'u>cient uantitie' to chan&e the%errou' characteri'tic'.

Non"%errou' alloy' are made u) o% to or more non%errou'element'.

Becau'e 'teel varie' in car*on content and alloyin& element'7 a'y'tem to &rou) it u'in& 'tandard' e'ta*li'hed *y the Society o%

4utomotive 0n&ineer' CS40 a' develo)ed.2. $n the S40 num*erin& 'y'tem7 the r't di&it indicate' the

&eneral ty)e o% 'teel. (he 'econd di&it indicate' the )ercenta&eo% the main alloy in the 'teel. (he third and %ourth di&it' 'hothe )ercent o% car*on in the 'teel in hundredth' o% one )ercent.

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O*+. 3

Phy'ical and chemical te't' are u'ed to determine the ty)eo% metal.(he 4))earance (e't involve' identication o% a metal *y it'

a))earance and u'e. 5olor and a))earance ma8e certainmetal' 'uch a' co))er7 *ra''7 and *ron;e ea'y to identi%y.

(he Ma&netic (e't involve' identication o% metal *y the u'e

o% a ma&net.(he 5hi'el (e't involve' identication o% metal *y the u'e o%

a hammer and cold chi'el.(he 6racture (e't involve' identication o% metal *y

%racturin& the metal and o*'ervin& the &rain.(he 6lame (e't involve' identication o% metal' *y a))lyin&

a =ame to them and atchin& hat occur'.6. (he S)ar8 (e't involve' identication o% metal' *y a))lyin&

them to a &rindin& heel and o*'ervin& the ')ar8 that i'&enerated. (he color7 'ha)e7 avera&e len&th7 and activity o%the ')ar8' are characteri'tic' o% the material *ein& te'ted.

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Re'ource'Bur8e7 Stanley R. and (.E. Wa8eman7

Modern Agricultural Mechanics, Danville,Illinois: $nter'tate Pu*li'her'7 $nc.7 ,##2.C(e-t*oo8 5ha)ter /.

Phi))'7 Floyd E. and 5arl Reynold'7Mechanics in Agriculture, Danville, Illinois:Interstate Pu*li'her'7 $nc.7 ,##2. C(e-t*oo85ha)ter ,/.

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online grocery store in noida.ppt

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