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1、首ana宣fo齐 of tforrous; emsitorSiS;sfficatSor q誓 b®口電为 strootwrc 耳孑为 qdw©-鬥arx9©dg叭谢 stoe>9®»Airr鬼 »nc£ tl&lcA off £apaaootKor>;tancfeircl is exclusix/ely intendeci for 0 morphologic ovaiciation of the directional dist Bci structure) of ferrite and per
2、lite in specia.1 case-harcieninQ steel products with max, to approx. S2.SOO mms (correspond!ng to approx. S SO-mm side sejuare sections or 4 ie diametor round t>ars>, subjecteci to heat treatment as indicateci in paragraph 3.S>. tanclarc! is losec! on the use of typical images.xamination is
3、 carried out on metallographic specimens wJmioh are examined with an cope for visiuoS comparison with typical imeiges.令cop© of tKo tr8»9greements on the scope of the trial must be fixed in the relevant concSitioos of siuppl for these agreements, tho following inciicsitions apply:> numbe
4、r of products in the dimensional supply cooditSons to be examineci for emc jst be th® object of an agreement between the parties;each product to be examineci, 1 sample must be teiken and subjected to heat treatr r 3.2;netallographic specimen must be preparecS for oach sampleWlettnioctSamplepie
5、not longer than SO mm must be taken from oach product examined and subjected ent as por par. 3.2 Its section sfna.il be:ual to tKe one of the examinee! product, if thie latter has m diameter or sic3e not great; mm;uare an the orcier of 2,SOO mm2f If the> product has ei diameter or side greater th
6、an 50 rr s type of products, on taking tKe sa.mple9 mark the sample face correspooding to the e sition or the original prociuict.picture on tho following page, for groeiter precision, an indicativ/e sampfinQ dieigram M of oxaimpie for different sections of sejuare products.食rmwr&v&rvS:ample
7、takon accorcSinQ to 尢he mothocSs fndicerteU in 3.P » must uncderQo tin® foUowin ent:aajo*ster58t8a:8r8«3 笈 总 定觀的书be電w够m «3©O arad S45O°GThe stay time at this tom perat us re must Joe such as to g uaLremtee the samj: eiuisteriitizJng and must be therefore correiated to t
8、he thickooss of the sample to be ti considering 1 min of stay eit this temperaiture per millimetre of thickness. The stay eiriy case must not be shorter than 30 min-oooiirtcs dm bmKmcoe c/cw© cccciMJcniw"Fhe most practical way to implement these corteditions consists io teiking the sampl t
9、he ustonitiziriQ furneice and introciuicinej it into tHe furoaice reguleitec* at 0 terrpera 610 to ©300, 2-h stay at this tomperature artc3 then air cooiinQ until reaching 0 tomperature.>-Tradiuziono in ingloso.doo:tioioe of any othor possible method, e. g. austenitizing at m tern p® ra
10、t ci re of 8GO° to num 30 min stay at this temperecture and cooling in the furnace, must be the ot>je( ment between the parties.育却址層昨割 aocSof!丹*心总曰弱。冒q wp曰心曹"丫即ach sample treated accorcJing to whiat indicatec! in par. 3.2, 2 specimen must be prep dance with the proscriptions of UIMI 3S3
11、7. "The surface to be polished mcjst be longitu iginail product anci in as close as possible a position to of the original product $ ted in the picture on the following paige.m ioeing otoserved at the optical microscope, the specimen must fc>e etched with Ficral JMJ 313-7).epical images tabl
12、e, on page 3 to 5t Inclucies 7 Imag&s Qoing from banding degree O tc i images are referred to a magnification fc>y 50 at the opticeii microscope. Observation ymmend&ci9 since it allows & more cor root evaluation of the fc>anciing degree, especially 5t degrees.ree correspoocds to s.
13、 practiceilly not bandec! structure; degrees from 1 to 3 corresi v b0厂icied struictures, whereas degrees from 4 to 6 corrosponci to wido bandeci structur eater laboratory conveniorice, tnowever, also the typical imago table with e magnifies given in Appendix B.IBtoriding de目roe oior>specimen prep
14、ared accordinQ to what stated tn par. 33, must be observed 0t the cope magnifieci k>y SO-a magnification corresponds to the original scale of the typical innages, "rhe examiriat ried out either directly at the eyepiece, or on an image projected on ground glass.lcFi sample, not less than 1 O
15、fields must be examineci for comparison with the typical ir e of objection!, recourse must t>e made to tbie direct millimetre measurement of the nui :toancis with tti® linear intercept methoci, at 1 OOX.lethod consists in superimposiriQ to tHe micrography, or directly to the microscop®
16、ey ght line with 厶 length porpendicufeir to the baocis and In couotinQ the cumber* of perlitic intersect tKis line- The number of beiccJs /7 at the millimetre is given by the ratio:?M is tho toteil numioer of iDancds courstecd;O is the magnificeition (io this c&se 1 OO>L. is the segment totol
17、 ienQtri in millimetres.iple way of indication, Whe diaiQram of ZKppenciix A shows the corroleitiori loetweon the r ds at the n-siliimetre and the bancJJng degree.T*rfi»8 reporta.1 report msust contain the foHowinQ inclicatioos:ol grade and number of heats;product from wFiicti the sample wsis t
18、aken;-Tre&duziorio in ingleso.doob total examiriecS surface;m JoancSing degree resultinQ from the comparison with the typical imeiges.-TradMzione In inglose.cfioo69.1410-8®. 29S. 2«r wrw WWW _ - 4_. 一_-_. . «Esame microscopico doi materiali ferrosi Olassificazione ciel la. struttu
19、ra sl t>ancie negii acciai da oementazioneliorosoopioal examination of f©rrouis matorials ioation of toarided struoture in case ha%L prosonto norma esclusivamente destinota alia valcjtSLZlooe morfolooioi dolli distrilociziooe direz do) dolla forrito e della perlite in prodotti di coioi leQit
20、i spooiaili da comontazione di seziooe msissima 22 SOO mrria (corrlspondonte a Quadri di oiroei 1 SO mm di lato o tondi di circa 1 70 mm cJI diorootro)v i trdttmonto lormico como indioekto io 3.2.Ia normo si bama sollUmnleoo dl Imrrtoioi tgc.L/esame vteoe effottcito su oampioni meteillOQrcifici che
21、voriQono eseim)r>ati al mlorosoopio ottloo. pe vislvo oor> imroiQini tipoGH accordl sull 'entity dello provei dovono oasere fi nolIo oorrispondonti oondiziorii di fornltuiro.cIqqH ocoordl valQono le iodiceizioni soguionti:aIt numoro di prodottI nollo oondizioni dimoneioneili di forniturei
22、da esamioare per oqoI ooleitei dove Qett<> di cxcoorcio frai le pairti;t>> per OQni prodotto da osamioeiro dove ossoro prolevaito 1 ssiggio da sottoporre al t rat men to tormioo o) per ogrii&soggio devo easere preporato un omplone motsillOQreifico"I °Rrolievo ci®I 3曲qq
23、FDa OQr>i prodotto in essime si deve prelevaire ur> sOQio non piu luingo di 50 mm cfm sottoporro al trattorr co dl cul ir> 3.2 ©cl dvento soziono:a) pari a quelle Uol prodotto io osome. so Questo Ha diametro o loto moo magQiore di SO mm;b) qmodrata deirordlne di 2 500 mm2, so il prodot
24、to ha diametro o lato magglore dl SO mrru Pdi QMOSto 1ipo. <Air«Mtto dol preliovo delsi dov® avere uura dl contrassognoro lei f£>oci» del s.s pond on to £xl Io posiziorte esterriei del prodotto di proven ienzo.Nello fiQMrA 3 patQinai soguonto* por maggioro cbiieirozzeL
25、. O rlportato, o tItolo dl esempio. uno sobieme del prel iovo p>er different! sezioni dl prodott I Quadri.II saQQio, prelovato second。 Io mocJolitdi indioaito in 31. devo essere aottoposto al seguento trittimen ») 缺23盘0码&«23 800 e O-GO °O11 tempo di permineozsi ai tomportt urei
26、 dovo ossoro taile d& gMreiritire let complete suistenitizzziono( co o vo cj <u lod I oorroleito «l Io<Joiv« «Jc* I c« t.n.1 r t ilri <J Irvveariorizfit uira por mil I imot ro di spossore. 11 tempo cJi pormaneoza non cfeve oomuinQoe ossoro minoro di 30 t>) reffrcS
27、cS®!o corbcJllxSor%i proedSrrto 0blP«»C4IIK3rlo11 metocio piCi pratico per reaiizzare tall oondizlooi oooisto not proloviro il oaimpiorte dol foroo di siust oe & iotrodurlo nel.forno rooolato allo tomporeiturei cii 610 a 630 °C. permsneozGi a tsle teroperturai po di rat f red
28、d a men to In drio f Ino & tomporMt uro aimloionto.L-'ovootMailo scolti eJi ailtro metodo quimle por esempio en-istemitizizaziooe alia tempordtcird di 860 &l QQO °C» za minima u femperotur» di 30 mln o roffreddamento In forno, dovo ossero OQQOtto di accordo tra le p.®
29、F*reil&vo & »r&p£ir4Baciorto c£«s>i cemp百met尸er ooni seiQQio trAttoto Goondo Queinto indioato iri 3.2 devo ossere preparato un oimpiono in aooordo sorizioni dello UNI 3137 l_a soperficie cio luoidexre dove essere lor>Qltudinalo rispotto «>l prodotto orig
30、inale zione pICi prossima po88it>lle a 1/4 del leito Cel prodotto originailo. uome iodicato mello fIgura a pgin II campiono, prirro doiroseorveiiono el microscopio ottico, deve essere attaccsito con Picryl o ZMal (vederc1*®voS« 35 SnrrrajjioS tip>oL-a tavola di immaQ Ini tlpov dl cul
31、 allo peig 3 a 5 . oomprondo T immeMQioi Ohio vamno dal grado O ail 0rad< daitMrsi. Lo immaQinl tipo sorio rolotivo ad uo iogreiriciimonto di SO c&l microsooplo ottIoo. SI oonsiQlisic no fit 50 X In Quinto pormotto uinsi pIG corrotta voluteizione del grado dl bacdBtui0. io pjirtiooleire nel c
32、ets piCi olovciti.11 Qrodo O corri8poode etd moo atrutt ura pressoohi non bwndata. i Qraidi dol I a III corrispondono a strut do strotto, mentro I Qrddl Cel IV eil VI corrlspondono o struttuiro 0 band© layhe.Nollvsippor>clioo B Q uomcimque riportatei, per comoditdi latooreitorlo. onoHe la td
33、vola dollo immeigini gre&oclimooto di 10O.normo LJZI sono revlslorWLte. quenclo rtecessarUo. com la put>t3licaziooo e$bn dl noovo odlzionldl foQll dl aQQiorncimonto.亡 Inito che gli utonti dolIo sstosso si accorttno di ossoro in rossosso doll*ultInnei odlzlone o tOQlio di ogQiomttmonto.SuovAll
34、toScHoma Indioaitivo Ul proliovo doi saiQQi du sottoporro al treittamento tormlco dl oui In 32 o cfollosciporf ioio dei ossorvr® al micro scop io oel urso <Ji prociottl QM£ic>ri di virio sozioni<18血盘色st®r>l o si m Qi one prepreito soooodo C|M«<n to ooo oclato in 3.
35、3 deve ossoro os so rv at to a I m ioroscopio ottioo ndimonto di SO.9sto iograndimento corrisponde aillsi soealsi oriQioeilo dolle iromaQini tipo L/esaEe si puid> effettuiaro o dlrettsimon- ill'ocMieire o sui unimmetQino proiott£xts< su votro smorigliMtoOQni osimpiono cJovo esoro osei
36、mioto por cootronto coo le immogini tipo cio nuimoro dl csimpi non minoro di IO. :aso di contetaizione si deve rioorrore allo misora dIretto del ouimero dl t>onde perlitioHo al millimetro con il iodo doll'intoroottai lineaire. ci 10O X.i®todo ooosiste nol sovrimporr© suHa microQr.f
37、iov o di rot tarn on to suil visore del microscopio. cioa rotta di lun- NNSt 厶 perpend tool»ro allo t>dndo o nol ooritaro il nomoro di beccie perliticNe Z cHo iotersecaoo tale ret tai If no- ro di bEccl© a 0l millimotro O deito UsUlm relfiziorte:A/ Gc - - 羞o: Z b il nuimoro c$i b©n
38、de toteile cootato;Q Q I*inQrar>ciirnor>to (nel 1st fattispecie *1OO);厶 O lei lungKoz:za toteilo del seQrr>ontot in millimotri.uro titolo indioat i vo not <J i ogreimmci riportoto io eip pen dice A. viene data Io correl£izior>e tr*N numoro di t>Gcde nilllmot ro g grodo dide to
39、rsi.di>sooonto di prov dovo contonore Io soQuionti iodioetzioni:adi eiooicAio ed il numoro di coleita;I prodotto da omi O stsito prolovdto iI seiQQio;o suporf icie totole esami not a;(SGQJUG)I Qreicio <Ji band&turm. como risultai dell confronto coo le immQini tipo.2Tovole ctetiotipo <50 X)33焊絵EWM撲壬去 r匸-< - =£乂站:汽;.二£序宦£?工壬殳=二二二;二?二泾世=1 弋六?.YALiXUmiRcnjbUcKihX.L : 冬举舉'c'窓:沅益盂三益汇三右二二:m=二參匸.-a匕全謡諺空E匕志乏永还或窈辿=吨沁;:飞:门:三二亏土二二汀* 二二。m 塗主M左二二亠二£1333Gracio IV4c4Gracio 7(SGQUG)4ARRENDICE ACorro1312:(000 indicative trsi grodo cH becdDtar®
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