Tiêu chuẩn iso 06344 3 2013

ISO 6344 3 2013 pdf © ISO 2013 Coated abrasives — Grain size analysis — Part 3 Determination of grain size distribution of microgrits P240 to P2500 Abrasifs appliqués — Granulométrie — Partie 3 Déterm[.]

Second edition2013-05-01

Reference numberISO 6344-3:2013(E)

Copyright International Organization for Standardization

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -COPYRIGHT PROTECTED DOCUMENT

© ISO 2013 – All rights reserved iii

Foreword iv

1 Scope 1

2 Normative references 1

͵ ‡”•ƒ††‡ϐ‹‹–‹‘• 1

4 Testing of microgrits P240 to P1200 1

ͶǤͳ 1

4.2 Designation of the test method 2

4.3 Test procedure using the US sedimentation tube 2

5 Testing of microgrits P1500 to P2500 17

ͷǤͳ 17

5.2 Designation of the test method 18

5.3 Test procedure 18

6 Designation 20

7 Marking 20

Annex A (informative) Form for recording results of a sedimentation analysis of microgrits of the P series using the US sedimentometer 21

Annex B (informative) Example of the presentation of the test data for the grain size distribution of fused aluminium oxide 23

Bibliography 25

Copyright International Organization for Standardization

ȋ–Š‡ –‡”ƒ–‹‘ƒŽ”‰ƒ‹œƒ–‹‘ˆ‘”–ƒ†ƒ”†‹œƒ–‹‘Ȍ‹•ƒ™‘”Ž†™‹†‡ˆ‡†‡”ƒ–‹‘‘ˆƒ–‹‘ƒŽ•–ƒ†ƒ”†•

„‘†‹‡• ȋ  ‡„‡” „‘†‹‡•ȌǤ Š‡ ™‘” ‘ˆ ’”‡’ƒ”‹‰ –‡”ƒ–‹‘ƒŽ –ƒ†ƒ”†• ‹• ‘”ƒŽŽ› …ƒ””‹‡† ‘—–

–Š”‘—‰Š  –‡…Š‹…ƒŽ …‘‹––‡‡•Ǥ ƒ…Š ‡„‡” „‘†› ‹–‡”‡•–‡† ‹ ƒ •—„Œ‡…– ˆ‘” ™Š‹…Š ƒ –‡…Š‹…ƒŽcommittee has been established has the right to be represented on that committee International

‘”‰ƒ‹œƒ–‹‘•ǡ ‰‘˜‡”‡–ƒŽ ƒ† ‘Ǧ‰‘˜‡”‡–ƒŽǡ ‹ Ž‹ƒ‹•‘ ™‹–Š ǡ ƒŽ•‘ –ƒ‡ ’ƒ”– ‹ –Š‡ ™‘”Ǥ  …‘ŽŽƒ„‘”ƒ–‡• …Ž‘•‡Ž› ™‹–Š –Š‡ –‡”ƒ–‹‘ƒŽ Ž‡…–”‘–‡…Š‹…ƒŽ ‘‹••‹‘ ȋ Ȍ ‘ ƒŽŽ ƒ––‡”• ‘ˆ

‡Ž‡…–”‘–‡…Š‹…ƒŽ•–ƒ†ƒ”†‹œƒ–‹‘Ǥ

͸͵ͶͶǦ͵™ƒ•’”‡’ƒ”‡†„›‡…Š‹…ƒŽ‘‹––‡‡ ȀʹͻǡSmall toolsǡ—„…‘‹––‡‡ͷǡGrinding wheels and abrasives.

Š‹••‡…‘†‡†‹–‹‘…ƒ…‡Ž•ƒ†”‡’Žƒ…‡•–Š‡ϐ‹”•–‡†‹–‹‘ȋ ͸͵ͶͶǦ͵ǣͳͻͻͺȌǤ –ƒŽ•‘‹…‘”’‘”ƒ–‡•–Š‡

‡…Š‹…ƒŽ‘””‹‰‡†— ͸͵ͶͶǦ͵ǣͳͻͻͺȀ‘””ǤͳǣͳͻͻͻǤŠ‡•‹‰‹ϐ‹…ƒ–…Šƒ‰‡•ƒ‰ƒ‹•– ͸͵ͶͶǦ͵ǣͳͻͻͺare the following:

ƒȌ ‡™†‡ϐ‹‹–‹‘•Šƒ˜‡„‡‡‹…Ž—†‡†‹Clause 3;

b) the test procedure in 4.3 Šƒ• „‡‡ …‘’Ž‡–‡Ž› —’†ƒ–‡†Ǣ ”‡“—‹”‡‡–• ˆ‘” –Š‡ —•‡ ‘ˆ –Š‡ 

•‡†‹‡–ƒ–‹‘–—„‡Šƒ˜‡”‡’Žƒ…‡†–Š‡”‡ˆ‡”‡…‡–‘ ͺͶͺ͸Ǧʹǡ‹‘”†‡”–‘ˆƒ…‹Ž‹–ƒ–‡–Š‡—•‡‘ˆ–Š‹•part of ISO 6344;

…Ȍ ‹„Ž‹‘‰”ƒ’Š›Šƒ•„‡‡ƒ††‡†Ǥ

͸͵ͶͶ…‘•‹•–•‘ˆ–Š‡ˆ‘ŽŽ‘™‹‰’ƒ”–•ǡ—†‡”–Š‡‰‡‡”ƒŽ–‹–Ž‡Coated abrasives — Grain size analysis:

— Part 1: Grain size distribution test

— Part 2: Determination of grain size distribution of macrogrits P12 to P220

— Part 3: Determination of grain size distribution of microgrits P240 to P2500

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -Coated abrasives — Grain size analysis —

ƒ„”ƒ•‹˜‡‰”‹–Šƒ˜‹‰ƒ‡†‹ƒ‡“—‹˜ƒŽ‡–†‹ƒ‡–‡”‘ˆͷͺǡͷɊ–‘ͺǡͶɊǡ™Š‘•‡‰”ƒ‹•‹œ‡†‹•–”‹„—–‹‘

‹•†‡–‡”‹‡†„›•‡†‹‡–ƒ–‹‘

3.2 grain size distribution

Copyright International Organization for Standardization

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -Table 1 — Grain size distribution of microgrits P240 to P1200 ds-values for testing with the US

sedimentometer Grit designation

ds95value

min.Ɋ

The permissible deviations are given in Table 2

Table 2 — Permissible deviations resulting from the variations due to the measuring technique

P400 P500 P600

P800 P1000 P1200 4.2 Designation of the test method

Š‡†‡•‹‰ƒ–‹‘‘ˆ–Š‡–‡•–‡–Š‘†„›‡ƒ•‘ˆ–Š‡•‡†‹‡–‘‡–‡”ˆ‘”‹…”‘‰”‹–•ʹͶͲ–‘ͳʹͲͲ‹•

as follows: Test method – Micro P

4.3 Test procedure using the US sedimentation tube

4.3.1 Testing by sedimentation

Š‡–‡•–‹‰‘ˆ‹…”‘‰”‹–•ʹͶͲ–‘ͳʹͲͲ„›•‡†‹‡–ƒ–‹‘•ŠƒŽŽ„‡…ƒ””‹‡†‘—–—•‹‰–Š‡•‡†‹‡–ƒ–‹‘

–—„‡™Š‡”‡„›–Š‡‰”ƒ‹•‹œ‡†‹•–”‹„—–‹‘‹•†‡–‡”‹‡†Ǥ

ƒȌ –Š‡ƒš‹—‰”ƒ‹•†‹ƒ‡–‡”ȋ–Š‡‘”‡–‹…ƒŽ‰”ƒ‹†‹ƒ‡–‡”Ȍ‘ˆ–Š‡ϐ‹”•–•‡†‹‡–‡†‰”ƒ‹ȋds0 value)

shall not exceed the maximum permissible ds0 value;

b) the grain diameter (theoretical grain diameter) shall not exceed the maximum permissible ds3 value

ƒ––Š‡͵Ψ’‘‹–‘ˆ–Š‡‰”ƒ‹•‹œ‡†‹•–”‹„—–‹‘…—”˜‡Ǣ…Ȍ –Š‡‡†‹ƒ‰”ƒ‹†‹ƒ‡–‡”ȋ–Š‡‘”‡–‹…ƒŽ‰”ƒ‹†‹ƒ‡–‡”Ȍ•ŠƒŽŽ„‡™‹–Š‹–Š‡•’‡…‹ϐ‹‡†–‘Ž‡”ƒ…‡•‘ˆ

the ds50˜ƒŽ—‡ƒ––Š‡ͷͲΨ’‘‹–‘ˆ–Š‡‰”ƒ‹•‹œ‡†‹•–”‹„—–‹‘…—”˜‡Ǣ

d) the grain diameter (theoretical grain diameter) shall at least attain the ds95˜ƒŽ—‡ƒ––Š‡ͻͷΨ’‘‹–

‘ˆ–Š‡‰”ƒ‹•‹œ‡†‹•–”‹„—–‹‘…—”˜‡Ǥ

Š‡ˆ‘—”…”‹–‡”‹ƒ•ŠƒŽŽ„‡‡–ƒ––Š‡•ƒ‡–‹‡ǤŠ‡˜ƒŽ—‡•ƒ”‡•’‡…‹ϐ‹‡†‹Table 1.The permissible deviations are given in Table 2

4.3.2 Test apparatus

The US sedimentation tube consists of a vertical sedimentation tube of 940 mm in length and of 20 mm

‹•‹†‡†‹ƒ‡–‡”Ǥ –‹••—””‘—†‡†„›ƒ™ƒ–‡”Œƒ…‡–‹™Š‹…Š–Š‡™ƒ–‡”–‡’‡”ƒ–—”‡‹•ƒ‹–ƒ‹‡†ƒ–ƒconstant level

 ‰”ƒ†—ƒ–‡† …‘ŽŽ‡…–‹‰ –—„‡ ‹• ϐ‹š‡† ƒ– –Š‡ „‘––‘ ‘ˆ –Š‡ •‡†‹‡–ƒ–‹‘ –—„‡Ǥ Š‡ ™Š‘Ž‡ ƒ••‡„Ž› ‹•

‘—–‡†‘ƒˆ”ƒ‡ǡ–Š‡„ƒ•‡’Žƒ–‡‘ˆ™Š‹…Š‹•ϐ‹––‡†™‹–ŠŽ‡˜‡Žƒ†Œ—•–‹‰•…”‡™•ˆ‘”‡‡’‹‰–Š‡–—„‡vertical (see Figure 1)

‘”–Š‡†‡•‹‰ƒ††‹‡•‹‘•‘ˆ–Š‡…‘ŽŽ‡…–‹‰–—„‡ǡ•‡‡Figure 2

‘‹’”‘˜‡–Š‡ƒ……—”ƒ…›‘ˆ•‡†‹‡–ƒ–‹‘˜‘Ž—‡”‡ƒ†‹‰•ǡ‹–‹•”‡…‘‡†‡†–Šƒ–ƒŠ‘”‹œ‘–ƒŽ„‡ƒ

Ž‹‰Š–•‘—”…‡ƒ†ƒƒ‰‹ˆ›‹‰‰Žƒ••„‡—•‡†Ǥ–‹‡’”‹–‡””‡†‡”•–Š‡”‡…‘”†‹‰‘ˆ–Š‡•‡†‹‡–ƒ–‹‘times easier

Copyright International Organization for Standardization

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -Dimensions in millimetres

Key

‹ƒŽ‰”ƒ†—ƒ–‹‘ƒ†ϐ‹‰—”‡••ŠƒŽŽ„‡‹™Š‹–‡Ǥ

50 division marks at equal intervals (graduation about 1 mm)

Figure 2 — Collecting tube

4.3.3 Test equipment 4.3.3.1 Sedimentation medium

Copyright International Organization for Standardization

Š‡ •‡––‹‰ —’ –Š‡  •‡†‹‡–‘‡–‡” ˆ‘” —•‡ ƒ• –Š‡ –‡•– †‡˜‹…‡ǡ …Š‡… –Šƒ– –Š‡ …‘ŽŽ‡…–‹‰ –—„‡ ‹•

’‘•‹–‹‘‡† …‡–”ƒŽŽ› ‹ –Š‡ •‡†‹‡–ƒ–‹‘ –—„‡Ǥ – ‹• Š‡Ž† ‹ –Š‡ ˜‡”–‹…ƒŽ ’‘•‹–‹‘ „› ƒ ”—„„‡” •’ƒ…‡”located about 30 mm from the top of the collecting tube Check this using a plumb line suspended from

–Š‡–‘’‘ˆ–Š‡•‡†‹‡–ƒ–‹‘–—„‡ƒ†–Š‡…‘ŽŽ‡…–‹‰–—„‡ǤŠ‡’Ž—„Ž‹‡•ŠƒŽŽ’ƒ••…‡–”ƒŽŽ›–Š”‘—‰Š

„‘–Š–Š‡•‡†‹‡–ƒ–‹‘–—„‡ƒ†–Š‡…‘ŽŽ‡…–‹‰–—„‡ǤŠ‡†‡˜‹…‡‹•ƒ†Œ—•–‡†„›‡ƒ•‘ˆ–Š‡ƒ†Œ—•–‹‰screws on the base plate

ˆ–‡”ƒ†Œ—•–‡–ǡϐ‹ŽŽ–Š‡™ƒ–‡”Œƒ…‡–ƒ†…‘‡…–‹––‘ƒ–Š‡”‘•–ƒ–Ǥ

4.3.4.1.2 Test temperature

Š‡ –‡•–‹‰ ‘ˆ –Š‡ ‰”ƒ‹ •‹œ‡ •ŠƒŽŽ „‡ …ƒ””‹‡† ‘—– —†‡” …‘•–ƒ– –‡’‡”ƒ–—”‡ ™‹–Š ƒ ’‡”‹••‹„Ž‡

†‡˜‹ƒ–‹‘‘ˆάͲǡͳιǤ –‹•…‘˜‡‹‡––‘—•‡ƒ–‡•––‡’‡”ƒ–—”‡‘ˆʹͷιǤŠ‡‰”ƒ‹†‹ƒ‡–‡”•‹†‹…ƒ–‡†‹Tables 4 and 5 for the

”‡•’‡…–‹˜‡–‹‡•‘ˆ•‡†‹‡–ƒ–‹‘ƒ’’Ž›–‘–Š‹•–‡’‡”ƒ–—”‡‘Ž›Ǥ

Copyright International Organization for Standardization

several times during this period The temperature of the medium shall be the same as the temperature

of the medium in the sedimentation tube

4.3.4.2.4 Transfer to sedimentation tube

Place a suitable funnel in the sedimentation tube Shake the test-tube containing the sample and the

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -Table 4 — Theoretical grain diameter, d, for grits of fused aluminium oxide as a function of time of sedimentation, t, when using methyl alcohol as sedimentation medium at test temperature ʹͷι

ͲǡͷͲ ͳͳʹǡ͹ ʹǡͷͲ ͷͲǡͶ ͶǡͷͲ ͵͹ǡ͸ ͺǡͲͲ ʹͺǡʹ ʹ͵ǡͲͲ ͳ͸ǡ͸ Ͳǡͷͷ ͳͲ͹ǡͷ ʹǡͷͷ Ͷͻǡͻ Ͷǡͷͷ ͵͹ǡͶ ͺǡʹͲ ʹ͹ǡͺ ʹͶǡͲͲ ͳ͸ǡ͵ Ͳǡ͸Ͳ ͳͲʹǡͻ ʹǡ͸Ͳ ͶͻǡͶ Ͷǡ͸Ͳ ͵͹ǡʹ ͺǡͶͲ ʹ͹ǡͷ ʹͷǡͲͲ ͳͷǡͻ Ͳǡ͸ͷ ͻͺǡͻ ʹǡ͸ͷ 49 Ͷǡ͸ͷ 37 ͺǡ͸Ͳ ʹ͹ǡʹ ʹ͸ǡͲͲ ͳͷǡ͸ Ͳǡ͹Ͳ ͻͷǡ͵ ʹǡ͹Ͳ Ͷͺǡͷ Ͷǡ͹Ͳ ͵͸ǡͺ ͺǡͺͲ ʹ͸ǡͻ ʹ͹ǡͲͲ ͳͷǡ͵ Ͳǡ͹ͷ 92 ʹǡ͹ͷ Ͷͺǡͳ Ͷǡ͹ͷ ͵͸ǡ͸ ͻǡͲͲ ʹ͸ǡ͸ ʹͺǡͲͲ ͳͷǡͳ ͲǡͺͲ ͺͻǡͳ ʹǡͺͲ Ͷ͹ǡ͸ ͶǡͺͲ ͵͸ǡͶ ͻǡʹͲ ʹ͸ǡ͵ ʹͻǡͲͲ ͳͶǡͺ Ͳǡͺͷ ͺ͸ǡͶ ʹǡͺͷ Ͷ͹ǡʹ Ͷǡͺͷ ͵͸ǡʹ ͻǡͶͲ 26 ͵ͲǡͲͲ ͳͶǡ͸ ͲǡͻͲ 84 ʹǡͻͲ Ͷ͸ǡͺ ͶǡͻͲ 36 ͻǡ͸Ͳ ʹͷǡ͹ ͵ʹǡͲͲ ͳͶǡͳ Ͳǡͻͷ ͺͳǡͺ ʹǡͻͷ Ͷ͸ǡͶ Ͷǡͻͷ ͵ͷǡͺ ͻǡͺͲ ʹͷǡͷ ͵ͶǡͲͲ ͳ͵ǡ͹ ͳǡͲͲ ͹ͻǡ͹ ͵ǡͲͲ 46 ͷǡͲͲ ͵ͷǡ͸ ͳͲǡͲͲ ʹͷǡʹ ͵͸ǡͲͲ ͳ͵ǡ͵ ͳǡͲͷ ͹͹ǡͺ ͵ǡͲͷ Ͷͷǡ͸ ͷǡͳͲ ͵ͷǡ͵ ͳͲǡʹͲ 25 ͵ͺǡͲͲ ͳʹǡͻ ͳǡͳͲ 76 ͵ǡͳͲ Ͷͷǡ͵ ͷǡʹͲ 35 ͳͲǡͶͲ ʹͶǡ͹ ͶͲǡͲͲ ͳʹǡ͸ ͳǡͳͷ ͹Ͷǡ͵ ͵ǡͳͷ ͶͶǡͻ ͷǡ͵Ͳ ͵Ͷǡ͸ ͳͲǡ͸Ͳ ʹͶǡͷ ͶʹǡͲͲ ͳʹǡ͵ ͳǡʹͲ ͹ʹǡͺ ͵ǡʹͲ ͶͶǡ͸ ͷǡͶͲ ͵Ͷǡ͵ ͳͲǡͺͲ ʹͶǡʹ ͶͶǡͲͲ 12 ͳǡʹͷ ͹ͳǡ͵ ͵ǡʹͷ ͶͶǡʹ ͷǡͷͲ 34 ͳͳǡͲͲ 24 Ͷ͸ǡͲͲ ͳͳǡͺ ͳǡ͵Ͳ ͸ͻǡͻ ͵ǡ͵Ͳ Ͷ͵ǡͻ ͷǡ͸Ͳ ͵͵ǡ͹ ͳͳǡʹͲ ʹ͵ǡͺ ͶͺǡͲͲ ͳͳǡͷ ͳǡ͵ͷ ͸ͺǡ͸ ͵ǡ͵ͷ Ͷ͵ǡͷ ͷǡ͹Ͳ ͵͵ǡͶ ͳͳǡͶͲ ʹ͵ǡ͸ ͷͲǡͲͲ ͳͳǡ͵ ͳǡͶͲ ͸͹ǡͶ ͵ǡͶͲ Ͷ͵ǡʹ ͷǡͺͲ ͵͵ǡͳ ͳͳǡ͸Ͳ ʹ͵ǡͶ ͷͷǡͲͲ ͳͲǡͺ ͳǡͶͷ ͸͸ǡʹ ͵ǡͶͷ Ͷʹǡͻ ͷǡͻͲ ͵ʹǡͺ ͳͳǡͺͲ ʹ͵ǡʹ ͸ͲǡͲͲ ͳͲǡ͵ ͳǡͷͲ ͸ͷǡͳ ͵ǡͷͲ Ͷʹǡ͸ ͸ǡͲͲ ͵ʹǡͷ ͳʹǡͲͲ 23 ͸ͷǡͲͲ ͻǡͻ ͳǡͷͷ 64 ͵ǡͷͷ Ͷʹǡ͵ ͸ǡͳͲ ͵ʹǡ͵ ͳʹǡͷͲ ʹʹǡͷ ͹ͲǡͲͲ ͻǡͷ ͳǡ͸Ͳ 63 ͵ǡ͸Ͳ 42 ͸ǡʹͲ 32 ͳ͵ǡͲͲ ʹʹǡͳ ͹ͷǡͲͲ ͻǡʹ ͳǡ͸ͷ ͸ʹǡͻ ͵ǡ͸ͷ Ͷͳǡ͹ ͸ǡ͵Ͳ ͵ͳǡͺ ͳ͵ǡͷͲ ʹͳǡ͹ ͺͲǡͲͲ ͺǡͻ ͳǡ͹Ͳ ͸ͳǡͳ ͵ǡ͹Ͳ ͶͳǡͶ ͸ǡͶͲ ͵ͳǡͷ ͳͶǡͲͲ ʹͳǡ͵ ͺͷǡͲͲ ͺǡ͸ ͳǡ͹ͷ ͸Ͳǡʹ ͵ǡ͹ͷ Ͷͳǡʹ ͸ǡͷͲ ͵ͳǡ͵ ͳͶǡͷͲ ʹͲǡͻ ͻͲǡͲͲ ͺǡͶ ͳǡͺͲ ͷͻǡͶ ͵ǡͺͲ ͶͲǡͻ ͸ǡ͸Ͳ 31 ͳͷǡͲͲ ʹͲǡ͸ ͻͷǡͲͲ ͺǡʹ ͳǡͺͷ ͷͺǡ͸ ͵ǡͺͷ ͶͲǡ͸ ͸ǡ͹Ͳ ͵Ͳǡͺ ͳͷǡͷͲ ʹͲǡʹ ͳͲͲǡͲͲ 8 ͳǡͻͲ ͷ͹ǡͺ ͵ǡͻͲ ͶͲǡͶ ͸ǡͺͲ ͵Ͳǡ͸ ͳ͸ǡͲͲ ͳͻǡͻ ͳͲͷǡͲͲ ͹ǡͺ ͳǡͻͷ ͷ͹ǡͳ ͵ǡͻͷ ͶͲǡͳ ͸ǡͻͲ ͵Ͳǡ͵ ͳ͸ǡͷͲ ͳͻǡ͸ ͳͳͲǡͲͲ ͹ǡ͸ ʹǡͲͲ ͷ͸ǡͶ ͶǡͲͲ ͵ͻǡͻ ͹ǡͲͲ ͵Ͳǡͳ ͳ͹ǡͲͲ ͳͻǡ͵ ͳͳͷǡͲͲ ͹ǡͶ ʹǡͲͷ ͷͷǡ͹ ͶǡͲͷ ͵ͻǡ͸ ͹ǡͳͲ ʹͻǡͻ ͳ͹ǡͷͲ ͳͻǡͳ ͳʹͲǡͲͲ ͹ǡ͵ ʹǡͳͲ 55 ͶǡͳͲ ͵ͻǡͶ ͹ǡʹͲ ʹͻǡ͹ ͳͺǡͲͲ ͳͺǡͺ ͳ͵ͲǡͲͲ 7 ʹǡͳͷ ͷͶǡͶ Ͷǡͳͷ ͵ͻǡͳ ͹ǡ͵Ͳ ʹͻǡͷ ͳͺǡͷͲ ͳͺǡͷ ͳͶͲǡͲͲ ͸ǡ͹ ʹǡʹͲ ͷ͵ǡ͹ ͶǡʹͲ ͵ͺǡͻ ͹ǡͶͲ ʹͻǡ͵ ͳͻǡͲͲ ͳͺǡ͵ ͳͷͲǡͲͲ ͸ǡͷ ʹǡʹͷ ͸Ͳǡͳ Ͷǡʹͷ ͵ͺǡ͹ ͹ǡͷͲ ʹͻǡͳ ͳͻǡͷͲ 18 ͳ͸ͲǡͲͲ ͸ǡ͵ ʹǡ͵Ͳ ͷʹǡ͸ Ͷǡ͵Ͳ ͵ͺǡͶ ͹ǡ͸Ͳ ʹͺǡͻ ʹͲǡͲͲ ͳ͹ǡͺ ͳ͹ͲǡͲͲ ͸ǡͳ ʹǡ͵ͷ 52 Ͷǡ͵ͷ ͵ͺǡʹ ͹ǡ͹Ͳ ʹͺǡ͹ ʹͲǡͷͲ ͳ͹ǡ͸ ͳͺͲǡͲͲ ͷǡͻ ʹǡͶͲ ͷͳǡͶ ͶǡͶͲ 38 ͹ǡͺͲ ʹͺǡͷ ʹͳǡͲͲ ͳ͹ǡͶ ͳͻͲǡͲͲ ͷǡͺ ʹǡͶͷ ͷͲǡͻ ͶǡͶͷ ͵͹ǡͺ ͹ǡͻͲ ʹͺǡͶ ʹʹǡͲͲ 17 ʹͲͲǡͲͲ ͷǡ͸

Copyright International Organization for Standardization

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -Table 5 — Theoretical grain diameter, d, for grits of silicon carbide as a function of time of

sedimentation, t, when using methyl alcohol as sedimentation medium at test temperature 25 °C

``,`,,,,,,`,,,`,``,,`,,```,`,`-`-`,,`,,`,`,,` -4.3.4.2.6 Determination of the maximum grain size

‘”–Š‡†‡–‡”‹ƒ–‹‘‘ˆ–Š‡ƒš‹—‰”ƒ‹•‹œ‡ǡ–Š‡’‡”‹‘†‘ˆ–‹‡‹•‡ƒ•—”‡†„‡–™‡‡–Š‡–”ƒ•ˆ‡”

‘ˆ•ƒ’Ž‡–‘–Š‡–—„‡ȋ•–ƒ”–‘ˆ‡ƒ•—”‡‡–Ȍƒ†–Š‡‘‡–™Š‡–Š‡ϐ‹”•–‰”ƒ‹”‡ƒ…Š‡•–Š‡„‘––‘

of the collecting tube

Š‡‰”ƒ‹•‹œ‡‘ˆˆ—•‡†ƒŽ—‹‹—‘š‹†‡‹•†‡–‡”‹‡†ƒ……‘”†‹‰–‘Table 4ƒ†–Š‡‰”ƒ‹•‹œ‡ˆ‘”•‹Ž‹…‘carbide according to Table 5

Š‡†‹ƒ‡–‡”‘ˆ–Š‡Dzϐ‹”•–‰”ƒ‹dz‹•…ƒŽŽ‡†ds0 value

If the permissible ds0˜ƒŽ—‡‹•‡š…‡‡†‡†ǡ–Š‡–‡•–•ŠƒŽŽ„‡”‡’‡ƒ–‡†™‹–Š‘‡‘”‘”‡‡™•ƒ’Ž‡•ǤŠ‡…for agglomeration

4.3.4.2.7 Recording measurement values

Š‡‹‹–‹ƒŽ’‘‹–‘ˆ–Š‡‰”ƒ‹•‹œ‡†‹•–”‹„—–‹‘…—”˜‡‹•–Š‡–‹‡™Š‡–Š‡ϐ‹”•–…‘–‹—‘—•ϐŽ‘™‘ˆ’ƒ”–‹…Ž‡•reaches the bottom of the collecting tube Check for agglomeration

„•‡”˜‡–Š‡ˆƒŽŽ‹‰’ƒ”–‹…Ž‡•ƒ†”‡…‘”†ǡ•—……‡••‹˜‡Ž›ǡ–Š‡–‹‡•™Š‡–Š‡•—”ˆƒ…‡•‘ˆ–Š‡•‡––Ž‡†‰”ƒ‹•reach a division line of the collecting tube (reading without parallax)

Š‡‡†’‘‹–‘ˆ‡ƒ•—”‡‡–‹•–Šƒ––‹‡™Š‡ƒŽŽ–Š‡’ƒ”–‹…Ž‡•Šƒ˜‡•‡––Ž‡†ǡ‹Ǥ‡Ǥ™Š‡–Š‡Š‡‹‰Š–‘ˆsedimentation is no longer changing

—”‹‰ •‡†‹‡–ƒ–‹‘ǡ –Š‡ ”—„„‡” ‰ƒ•‡– ƒ– –Š‡ „‘––‘ ‘ˆ –Š‡ …‘ŽŽ‡…–‹‰ –—„‡ •ŠƒŽŽ „‡ –ƒ’’‡† ‰‡–Ž›

„—–…‘–‹—‘—•Ž›ǤŠ‹•ƒ›„‡…ƒ””‹‡†‘—–„›‡ƒ•‘ˆƒ–ƒ’’‡”Ǥ –•ŠƒŽŽǡŠ‘™‡˜‡”ǡ‘–„‡–ƒ’’‡†‘–Š‡pressing lever supporting the tube or on the tube itself

ˆƒ‰‰Ž‘‡”ƒ–‹‘•‘ˆƒ„”ƒ•‹˜‡‰”‹–•…ƒ„‡‘„•‡”˜‡††—”‹‰–Š‡•‡†‹‡–ƒ–‹‘ǡ–Š‹•‹•ƒ•‹‰‘ˆ‹•—ˆϐ‹…‹‡–

’”‡–”‡ƒ–‡–‘ˆ–Š‡•ƒ’Ž‡Ǥ •—…Š…ƒ•‡•ǡ–Š‡ƒƒŽ›•‹••ŠƒŽŽ„‡”‡’‡ƒ–‡†Ǥ

4.3.5 Evaluation 4.3.5.1 Determination of grain diameter, d

Š‡ †‡–‡”‹ƒ–‹‘ ‘ˆ –Š‡ ‰”ƒ‹ •‹œ‡ †‹•–”‹„—–‹‘ ƒ……‘”†‹‰ –‘ –Š‹• –‡•– ‡–Š‘† ‹• „ƒ•‡† ‘ –‘‡•ǯ

Žƒ™Ǥ‹…‡ƒŽŽ…‘†‹–‹‘•ǡ‡š…‡’––Š‡–‹‡‘ˆ•‡†‹‡–ƒ–‹‘ǡƒ†–Š‡‰”ƒ‹•‹œ‡ƒ”‡…‘•–ƒ–ˆ‘”ƒ‰‹˜‡

‹…”‘‰”‹–ǡ–Š‡–‘‡•ǯˆ‘”—Žƒ…ƒ„‡•‹’Ž‹ϐ‹‡†ƒ•ˆ‘ŽŽ‘™•ǣ

d K t

=

where

d ‹•–Š‡‡“—‹˜ƒŽ‡–‰”ƒ‹†‹ƒ‡–‡”ǡ‹‹…”‘‡–”‡•Ǣ

K mentation medium;

‹•–Š‡…‘•–ƒ–™Š‘•‡˜ƒŽ—‡‹•†‡’‡†‡–—’‘–‡’‡”ƒ–—”‡ǡƒ–‡”‹ƒŽ–‘„‡–‡•–‡†ƒ†•‡†‹-t ‹•–Š‡–‹‡‘ˆ•‡†‹‡–ƒ–‹‘ǡ‹‹—–‡•Ǥ

Š‡–Š‡–‡•––‡’‡”ƒ–—”‡‹•ʹͷιǡ–Š‡K˜ƒŽ—‡•ˆ‘”‡–Š›ŽƒŽ…‘Š‘Žƒ”‡͹ͻǡ͹ˆ‘”ˆ—•‡†ƒŽ—‹‹—‘š‹†‡

ƒ†ͻͳǡͳˆ‘”•‹Ž‹…‘…ƒ”„‹†‡ǤThese values represent a basis for the determination of the equivalent grain diameters in Tables 4 and

5Ǥ ‘”‘–Š‡”–‡•––‡’‡”ƒ–—”‡•ǡ–Š‡‰”ƒ‹†‹ƒ‡–‡”•ƒ”‡ƒŽ•‘–‘„‡…ƒŽ…—Žƒ–‡†ƒ……‘”†‹‰–‘–‘‡•ǯŽƒ™Ǥ

The K˜ƒŽ—‡•ˆ‘”–Š‡–‡’‡”ƒ–—”‡•„‡–™‡‡ͳͺ郐†͵Ͳ郔‡‰‹˜‡‹Table 6

Copyright International Organization for Standardization

The formulae for the determination of the K values as follows:

— for fused aluminium oxide: Kαͻ͸ǡͳ͸ΫͲǡ͸ͷ͹Ʌ

— column 2: time of sedimentation t;

— column 3: volume fraction of the settled sample determined according to Table 7;

Ȅ …‘Ž—Ͷǣ‰”ƒ‹†‹ƒ‡–‡”ǡdǡˆ‘”ˆ—•‡†ƒŽ—‹‹—‘š‹†‡†‡–‡”‹‡†ƒ……‘”†‹‰–‘Table 4 and for silicon carbide according to Table 5

Table 7 — Volume fractions of settled sample as function of height of sedimentation, h, related

to total height of sedimentation, htot, of sample

Height of tation

Copyright International Organization for Standardization

Figure 4 — Grain size distribution curve, represented on linear graph paper —

Measuring values and permissible limiting values

Copyright International Organization for Standardization

Figure 6 — Grain size distribution curve, represented on logarithmic probability graph paper

(example as in Figure 4 but with reduced number of measuring points) —

Measured values and deviations

The sample is in accordance with this part of ISO 6344 when the values for ds0ǡds3ǡds50 and ds95 are within the permissible limits.

Š‡ …Š‡…‹‰ –Š‡ ‡ƒ•—”‡† ”‡•—Ž–•ǡ ƒŽŽ‘™ƒ…‡ •ŠƒŽŽ „‡ ƒ†‡ ˆ‘” ˜ƒ”‹ƒ–‹‘• †—‡ –‘ –Š‡ ‡ƒ•—”‹‰

–‡…Š‹“—‡Ǥ Š‡•‡ ’‡”‹••‹„Ž‡ †‡˜‹ƒ–‹‘•ǡ ‰‹˜‡ ‹Table 2ǡ Šƒ˜‡ „‡‡ †‡–‡”‹‡† ‘ –Š‡ „ƒ•‹• ‘ˆ –Š‡standard deviations resulting from a round robin test The tolerances for production microgrits given

in Table 1•ŠƒŽŽ„‡‹…”‡ƒ•‡†„›–Š‡•‡˜ƒŽ—‡•Ǥ

4.3.5.5 Example of testing a sample of fused aluminium oxide

‰”‹–ƒ†‡‘ˆˆ—•‡†ƒŽ—‹‹—‘š‹†‡‹•–‡•–‡†‹–Š‡•‡†‹‡–ƒ–‹‘‡†‹—ƒ–ƒ–‡’‡”ƒ–—”‡‘ˆʹͷιǤ

Š‡–‹‡‹•‡ƒ•—”‡†ƒ†”‡…‘”†‡†™Š‡–Š‡ϐ‹”•–…‘–‹—‘—•ϐŽ‘™‘ˆ’ƒ”–‹…Ž‡•”‡ƒ…Š‡•–Š‡„‘––‘‘ˆthe collecting tube

ˆ–‡”–Š‹•ǡ–Š‡–‹‡•ƒ”‡”‡…‘”†‡†™Š‡–Š‡•‡†‹‡–ƒ–‹‘Š‡‹‰Š–•ǡhǡŠƒ˜‡”‡ƒ…Š‡†‘‡†‹˜‹•‹‘ƒ”

‡ƒ…ŠǤ––Š‡‡†‘ˆ–Š‡‡ƒ•—”‡‡–ǡ–Š‡–‘–ƒŽ•‡†‹‡–ƒ–‹‘Š‡‹‰Š–ǡhtotǡ”‡ƒ…Š‡•ʹͶ†‹˜‹•‹‘ƒ”•ǤŠ‡established times are entered in column 2 of the form shown in Annex A

‡ƒ•—”‡‡– ƒ– –Š‡ †‹˜‹•‹‘ Ž‹‡• ͳǡ ʹǡ ͷǡ ͳͲǡ ͳͷ ƒ† ʹͲ ƒ”‡ ‡–‡”‡†Ǥ Š‡ ‡•–ƒ„Ž‹•Š‡† ˜ƒŽ—‡• •ŠƒŽŽ „‡compared with the permissible deviations according to Table 2

5.1 General

Š‡–‡•–‹‰‘ˆ‹…”‘‰”‹–•ͳͷͲͲ–‘ʹͷͲͲ„›•‡†‹‡–ƒ–‹‘‹•„ƒ•‡†‘–Š‡‹…”‘ǦǦƒ•–‡”‰”‹–•ͳͷͲͲǡP2000 and P2500 (of fused aluminium oxide)

Š‡Ž‹‹–•ƒ”‡•’‡…‹ϐ‹‡†‹ ͸͵ͶͶǦͳǣͳͻͻͺǡƒ„Ž‡͵ǡ™Š‹…Š‹•”‡’”‘†—…‡†ƒ•ȋ–Š‡ˆ‘ŽŽ‘™‹‰ȌTable 8

Copyright International Organization for Standardization