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UNIVERSIDAD INDUSTRIAL DE SANTANDER

LABORATORIO DE MATERIALES GRUPO J3

II SEMESTRE DE 2013

PRESENTADO POR: JOHAN ENRIQUE GALLO CHACON 2112173

DIEGO ALEXANDER SEPULVEDA 2112180

LABORATORIO: DUREZA DE BRINELL FUNDICION DE HIERRO

Introduccin

La d!"#a "$ %a &!'&("dad )%da*"%+a, d" ,'$ *a+"!(a,"$ - "$+. !",a/('%ada /'% ,a !"$($+"%/(a

*"/.%(/a La d!"#a &"d" d")(%(!$" /'*' ,a !"$($+"%/(a d" % *a+"!(a, a ,a &"%"+!a/(% '

)'!*a/(% d" ",,a$ ,'/a,(#ada$ "% %a $&"!)(/(" Ca%+' *.$ &""4a $"a ,a ",,a '5+"%(da "%

/'%d(/('%"$ %'!*a,(#ada$6 *.$ d!' $"!. ", *a+"!(a, "%$a-ad' E, &"%"+!ad'! "% % "%$a-' d"

d!"#a "$ "%"!a,*"%+" %a "$)"!a6 &(!.*(d" ' /'%' "/' d" % *a+"!(a, */' *.$ d!' d", "

$" "%$a-a6 /'*' &'! ""*&,' a/"!' "%d!"/(d'6 d(a*a%+" ' /a!5!' d" +%$+"%' $(%+"!(#ad'

E, (%+"!9$ d" ,a d"+"!*(%a/(% d" ,a d!"#a "% ,'$ a/"!'$ "$+!(5a "% ,a /'!!",a/(% "($+"%+" "%+!" ,a

d!"#a - ,a !"$($+"%/(a *"/.%(/a6 $("%d' % *9+'d' d" "%$a-' *.$ "/'%*(/' - !.&(d' " ",

"%$a-' d" +!a//(%6 &'! ,' " $ $' "$+. *- "+"%d(d'

OBJETIVOS

D"+"!*(%a! ,a d!"#a B!(%",, a &a!+(! d" *9+'d' "$+ad;$+(/' - *9+'d' d" Ga$$

DATOS

L'$ da+'$ +'*ad'$ "% ", ,a5'!a+'!(' $" *"$+!a% a /'%+(%a/(%:

DATO

DATO

DATO

DATO

270 1 30? @ 3@0 13 370 1@

27@ 1 308 2 3@@ 2 37@ @

27? 1 310 11 3@? @ 37? @

278 1 31@ 1 3@8 1 380 7

280 2 31? 1 30 10 38@ @

28@ 1 320 8 3@ @ 30 2

28? 2 32@ 2 3? 8 3@ 2

288 3 32? 2 38 2 3? 1

20 2 328 1 3?0 @7 @00 1

2@ 1 330 7 3?2 2 @10 1

300 ? 33@ @ 3?@ 1? @1? 1

30@ 1 338 3 3?8 @20 1

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Mtodo de Gu!!

D" ,a +a5,a &'d"*'$ '5$"!a! ":

Da+' *.(*' d*a 3?

Da+' *;%(*' d*(% 328

Dureza presumible=dmin+DC

2 DC=dmaxdmin=68

DP=328+68

2=362kg/mm

2

328 338 348 358 368 378 3880

5

10

15

20

25

30

35

40

45

50

1

7

4 3

13

24

2

10

4

8

2

47

2

16

9

14

4 4

7

42 2 1

Frecuencia vs Datos

Datos [kg/mm]

Frecuencia [f]

G!a)(/' N' 1

S" /'%/,-" d" ,a !.)(/a - d", a,'! +"!(/' " ,a d!"#a &!"$*(5," d", a/"!' "$ d" 3?2 F**

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Mtodo E!td"!tico

e=Li[N

2 fi

fmediana]A1 Ha,,a*'$ ,a /a%+(dad d" (%+"!a,'$:

1+3.3logN=5 T"%"*'$ /(%/' (%+"!a,'$

2 A'!a /a,/,a*'$ ,a a*&,(+d d" ,'$ (%+"!a,'$:

Dispersionexperimento=

D . E=

dmayor

dmenor=

396

270=

126

A= D. E

No . Intervalos=

126

5=25

I%+"!a,'$

[270295 ) 1

[295320 ) 2?

[320345

) @2[345370 ) 103 M"d(a%a d" ,'$ da+'$

[370395 ) 37

[395420 )

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20

20

40

60

80

100

120

15

26

42

103

37

5

Frecuencia Vs. Intervalo datos

interalo de Datos

Frecuenca

G!a)(/' N' 2

e=345+[227

242

103 ]=345kg /mm

CONCLU#IONE#

La d!"#a &!"$*(5," d", a/"!' "$ d" 3?2 F**

D" ,a !.)(/a N'2 '5$"!a*'$ " ", "" d" ,a /!a "$ 3?0 F**

M" 3@ F**

La d!"#a d", a/"!' @1@0 "$ a&!'(*ada*"%+" 3?2 F**