《AA-TP-2-1990.pdf》由会员分享，可在线阅读，更多相关《AA-TP-2-1990.pdf（15页珍藏版）》请在三一文库上搜索。
1、I N F m N m 0- O O O O O u) 3 O 4 O I l u I Q F a a 1990 the incorpor- Aluminum. Association o Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permi
2、tted without license from IHS -,-,- . AA TP-2 m 0604500 0009313 209 m / No warranty or guarantee of any kind, expressed or implied, by the Aluminum Association or its member companies accompanies this information. Accordingly, the Aluminum Association and its member companies assume no responsibilit
3、y or liability for their use whether based on warranty, contract, negligence, strict liability, product liability, or otherwise. The use by any member or nonmember of this test procedure is purely voluntary. The Associations publication of this test procedure does not in any respect prevent or restr
4、ict any member or nonmember from manufacturing or supplying pr.oducts tested under this or any other test procedure. All Aluminum Association published standards, data, specifications and other material are reviewed at least every five years and revised, reaffied or withdrawn. Users are advised to c
5、ontact the Aluminum Association to ascertain whether the information in this publication has been superseded in the interim between publication and proposed use. Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for
6、 Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS -,-,- 1. Scope : A A TP-2 Oh04500 0009334 345 W STANDARD TEST PROCEDURE FOR MEASURING THE DISSOLUTION OF ALUMINUM HARDENERS The Aluminum Association dissolution test procedure can be used to determine th
7、e suitability of an aluminum hardener product for alloying purposes. The test procedure describes a method for measuring dissolution time and recovery of the hardener element under standardized conditions. This method is not intended to predict dissolution rate or recovery under production condition
8、s in commercial operations. 2. Applicable Specifications and Registration Records - The following specifications or registration records (the issue in effect on date of material purchase) form a part of this test procedure: 2.1 Registration Record of Aluminum Association Designations and Chemical Co
9、mposition Limits for Aluminum Hardeners. 2.2 OSHA - 1910.1200 Hazard Communication Standard 2.3 Federal Test Method Standard No. 151 - Metals Methods 111.2 and 112.2 2.4 Metals Handbook Ninth Edition, Volume 9, Metallography and Microstructure Aluminum Alloys. p. 351. 2.5 ASTM B215, Standard Methods
10、 for Sampling Finished Lots Metal Powders. 2.6 ASTM E716, Standard Practice for Sampling Aluminum and Aluminum Alloys for Spectrochemical Analyses 3. Sample Location, Sample Frequency and Lot Definition 3.1 Ingot - Each heat of material shall be considered a lot. An ingot, selected randomly from a h
11、eat, may be considered representative of the lot. 3.2 Briquet - A lot is defined as a finite quantity produced under uniform conditions and should be clearly identified on material packaging. A shipment may contain more than one lot. Sample selection for chemical analysis shall be on a one lot basis
12、 and shall consist of one briquet pulled from each of three and not more than five randomly-selected shipping containers. these briquets are termed a “gross lot sample“ and will be the Combined, f Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/11
13、11111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS -,-,- - 2 - basis for a discreet analytical determination. Multiple ltgross lot samples“ shall be pulled if multiple chemical determinations are required. Sample select
14、ion for dissolution rate testing shall be completed in a similar manner, however, the total number of briquets required is to be based on addition level, and test bath weight. This sample should be held separate from analytical sample(s). 3.3 Canned Hardeners - A lot is defined as a finite quantity
15、produced under uniform conditions. A single can shall be pulled from a randomly-selected product container. 3.4 Powder - A lot is defined as a finite quantity produced under uniform conditions. be taken from a randomly-selected product container using approved sample cutting techniques. A powder sam
16、ple of the required weight shall 4. Sample Preparation 4.1 Chemical Analysis - The randomly-selected samples shall be prepared as follows: AA TP-2 m Ob04500 0007315 081 m 4.1.1 Ingot - The chemical analysis sample shall be comprised of drillings. The drillings shall be obtained from five (5) positio
17、ns of the ingot, diagonally located (Figure l), and shall include approximate equal weight of drill chips from top, middle and bottom for each sample point of the ingot. The drillings shall be mixed to form the sample. 4.1.2 Briquet - The chemical analysis sample(s) for briqyetted hardeners shall co
18、nsist of ground material taken from the Itgross lot sample“ described in Section 3.2. The entire tgross lot sample“ must be crushed with a mortar and pestle or mechanical pulverizer, taking care to minimize contamination or carryover. freely pass through an 8 mesh (2.36mm) screen. The entire sample
19、is then blended in a suitably-sized blender. It is recommended that a suitably-volatile- blending-aid addition be made during the blending step. The blended gross sample is then passed through a sample splitter to obtain four subsamples, 25 to 50 grams weight each. If a blending aid was added, it sh
20、ould be dried from the final subsamples before analysis. Three The resulting powder must Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted w
21、ithout license from IHS -,-,- - 3 - subsamples are analyzed. The final lot composition estimate is the average of the three separate analytical values 4.1.3 Powder - The required amount of powder shall be obtained from the sample using approved sample cutting techniques, per ASTM B215. 4.2 Dissoluti
22、on Rate - For determination of dissolution rate and recovery and metallographic examination, samples shall be prepared as follows: 4.2.1 Ingot - The randomly-selected ingot shall represent the heat. The sample for the dissolution test shall consist of one piece of the required weight, including top
23、and bottom surface from the center position of the ingot. 4.2.2 Briquet - The “dissolution sample“ collected as per Section 3.2 shall represent the production lot. It should consist of the required total briquet weight to meet addition level requirements for the involved test bath weight. Use of par
24、tial briquets should be avoided. 4.2.3 Powder and Cans - A randomly-selected powder sample or split sample, from the can, shall represent the batch or lot. 5. Chemical Composition 5.1 Procedure - The sample prepared in accordance with Section 4.1 shall be analyzed in accordance with Method 111.2 or
25、112.2 of Federal Test Method Standard No. 151. 5.2 Requirements - The hardeners, if registered, shall conform to the chemical composition limits shown in the Registration Record of Aluminum Association Designation and Chemical Composition for Aluminum Hardeners or if not registered, the hardener com
26、position shall be as agreed by the supplier and purchaser. 6. Dissolution Test Procedure Description - This standard test procedure is applicable for determining the dissolution rate of aluminum master alloys, or additives, in 99.7% aluminum and the recovery of the alloying element. Copyright The Al
27、uminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS -,-,- - 4 - 6.1 Dissolution Test Supplies and Equipment 6.1.1 Supply of 99.7% (P1
28、020) pure virgin aluminum with the following limits on impurities. Silicon O. 10 max Iron 0.20 max Others, each 0.03 Total 0.10 Aluminum BALANCE Other aluminum purity levels, mutually acceptable to the supplier and purchaser, may be used. 6.1.2 6.1.3 6.1.4 6.1.5 6.1.6 6.1.7 6.1.8 6.1.9 6.1.10 Electr
29、ic resistance furnace capable of maintaining 1382OF flOF (750OC f5OC), and Large enough to contain the required size crucible (Section 6.1.3). A crucible of material, inert to liquid aluminum or one with a suitable coating to render it inert, such as silicon carbide, clay-bonded graphite with Terrep
30、ain 55M coating or cast iron with Dykote (a Foeeco product) coating. Alternative coatings, found to be equivalent, may be used. to hold a heat large enough to provide the required number andsize of samples. The size of the crucible shall be adequate Calibrated and certified thermocouple and controll
31、er indicator capable of controlling and measuring temperature up to 1392OF (755OC). One appropriately-sized sampling ladle. Graphite melt skimmer with flat paddle surface. Clean aluminum plate. One standard, Type B, ASTM, E716, center-pour mushroom sample mold. Sixty-minute timer. Graphite stirring
32、rod, l-inch diameter x 24“ long (25.4 mm diameter x 609 mm long). Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS
33、 -,-,- - 5 - 6.1.11 Argon supply and appropriate tubes for fluxing. 6.1.12 Spectrochemical analysis equipment. 6.1.13 Lathe and tools for machining spectrochemical disc sample. 6.1.14 Magnaflux Digital Conductivity Meter, Model FM140, or equivalent. 6.1.15 Notebook. 6.1.16 Personal protective clothi
34、ng and face shield. 6.2 Procedure for Dissolution Test 6.2.1 Weigh aluminum (Section 6.1.1) to provide the desired heat size, place in appropriately-sized, clean, skull- free crucible (Section 6.1.3), and record weight of aluminum in notebook. 6.2.2 Heat the aluminum to an appropriate temperature an
35、d stabilize so that after addition of hardener, aluminum temperature shall be: 6.2.2.1 1337OF flOF (725O f5OC) for products to be used in a remelt facility. 6.2.2.2 1382OF flOF (750O f5OC) for products to be used in a smelter facility. 6.2.2.3 Other test temperatures may be used, subject to mutual a
36、greement by the supplier and the purchaser. 6.2.3 Flux melt with dry Argon flow rate of 4 cubic feet per hour for 10 minutes. 6.2.4 Skim the dross from the aluminum surface, deposit skim on clean aluminum plate or cast into suitable mold. When cooled to ambient temperature, weigh dross and record we
37、ight. Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS -,-,- - 6 - AA TP-2 W Ob04500 0009319 727 W 6.2.5 Take an i
38、nitial blank sample for chemical analysis. 6.2.5.1 Float the sample ladle on surface of the metal until it reaches temperature of the melt. If this chills the melt below the desired temperature, then heat ladle in a furnace. 6.2.5.2 Tilt the sample ladle and fill with molten metal 6.2.5.3 Remove sam
39、ple ladle and pour contents into the preheated (350OF 177OC) mushroom sample mold, return excess metal to crucible. 6.2.5.4 After sample has solidified, remove from mold and number sample “Ot8. 6.3 The amount of hardener element needed to satisfy most alloy requirements is : Bi smut h Boron Chromium
40、 Copper Iron Lead Magnesium Manganese Nickel Sil icon Strontium Titanium Vanadium Zirconium 0.10% or 0.50% 0.02% 0.25% 0.05% or 5.0% 0.50% or 1.0% 0.50% 0.50% or 5.0% 1.2% O. 7% 1.0% or 12.0% 0.02% 0.05% or 0.20% O. 08% 0.12% NOTE: Refer to OSHA-1910.1200 Hazard Communications Standard 6.4 Based upo
41、n the remaining heat size, calculate the quantity of hardener product required (equation below). Weigh hardener to be added, record.calculation and weights in notebook. where : WH = Weight of hardener alloy to be added, Iba (kg) Copyright The Aluminum Association Inc. Provided by IHS under license w
42、ith AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS -,-,- - 7 - AA TP-2 m Ob04500 O009320 449 m ED = Element content desired in melt, percent EH = Element content of hardener, percent (act
43、ual content reported by supplier or as determined by the user). WA = Weight of aluminum melt, lbs (kg) 6.5 Add the weighed hardener to the molten aluminum. Materials less dense than the aluminum should be held below the aluminum surface using coated steel or graphite tools. 6.6 For alloy hardeners,
44、stir the melt vigorously for 30 seconds immediately before the first sample is taken and then for 10 seconds immediately before each additional sample. 6.6.1 Samples (Section 6.2.5) shall be taken as follows: (a) For first 10 minutes at 1-minute intervals. (b) For next 50 minutes at 10-minute interv
45、als. (c) Skim dross from aluminum surface, cool, weigh, and record as in Section 6.2.4. 6.7 For briquets, do not stir for five minutes after addition. 6.7.1 Samples (Section 6.2.5) shall be taken as follows: (a) After addition, 2 minutes 5 minutes 10 minutes 20 minutes 30 minutes Final Sample (b) Te
46、n-second stirring shall be performed after the 5-minute and 30-minute samples. The final sample shall be taken immediately after stirring for 10 seconds. (c) Skim dross from aluminum surface, cool, weigh and record as in Section 6.2.4. 6.8 For canned hardeners, stir for 60 seconds starting 30 second
47、s after addition. Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:35:18 MDTNo reproduction or networking permitted without license from IHS -,-,- - 8 - AA TP-2 m Ob04500 0007321 385 m 6.8
48、.1 Samples (Section 6.2.5) shall be taken as follows: (a) Every 5 minutes for 30 minutes. (b) After the 30-minute sample, stir for 10 seconds, then take final sample. (c) Skim dross from aluminum surface, cool, weigh and record as in Section 6.2.4. 6.9 All samples shall be identified sequentially. 6.10 Observations for bubbles, fumes, flames or odors shall be made and recorded. 6.11 Record, in notebook, sample number, sampling time and temperature. 6.12 Analysis - Prepare the disk sa