1、UDC 669.295-4 : 620.1 DEUTSCHE NORM November 1990 Titanium and titanium alloy investment castings and rammed graphite castings Technical de I ive ry con d it i on s DIN 17865 GuBstcke aus Titan und Titanlegierungen; Feingu und KompaktguB In keeping with current practice in standards published by the
2、 International Organization for Standardization (/SO), a comma has been used throughout as the decimal marker. Contents 1 Scope and field of application 2 Designation and ordering 2.1 Standard designation . 2.2 Essential order details 2.3 Optional order details 3 Requirements . 3.1 Manufacturing pro
3、cess . 3.2 Chemical composition 3.2.1 Ladle analysis 3.2.2 Product analysis 3.3 Mechanical properties 3.4 Tolerances . Page 1 1 1 3 3 3 3 3 3 3 3 3 4.2 Size of batches . 4.2.1 Test batch 4.2.2 Heat treatment batch . . 4.3 Scope of testing 4.4 Sampling . 4.5 Test procedures . 4.5.1 Chemical compositi
4、on . 4.5.2 Tensile test 4.5.3 Acceptance inspection . 4.5.4 Corrective action 4.5.5 Retests . 4.6 Invalid test results . Page . 4 . 4 . 4 . 4 . 4 . 4 . 4 . 4 . 4 . 4 . 4 . 4 3.5 Surface condition 3 4 Testing . 4 Marking . 4 4.1 Inspection documents 4 4.1.2 Inspection certificate . 4.1.1 Test report
5、(certificate DIN 50 O49 - 2.2) 4 6 Packaging 4 (certificate DIN 50049-3.1 A, 3.1 B or 3.1 C) . 4 Standards and other documents referred to 6 1 Scope and field of application 2 Designation and ordering 1.1 ln conjunction with DIN 1690 Part 1,thisstandardspec- fies technical delivery conditions for ti
6、tanium and titanium alloy castings (?titanium castings?, for short). 1.2 Titanium and titanium-palladium alloy castings are intended primarily to be used in the construction of *ml Standard designation chemical plant and for products which are required to be resistant to corrosion (e.g. in the chemi
7、cal, paper, pulp, The standard designation shall give, in the following order: textile and food industries,for power plants, maritime struc- a) name of product (casting); tures, electroplating and surface refinement, as well as in b) DIN number (DIN 17865); c) material designation or number; applica
8、tions in medicine). 1.3 Castings made from other titanium materials are d) type of casting (investment or rammed graphite) When ordering,a distinction shall be made between essen- tial (cf.subclause 2.2) and optional (cf.subclause 2.3) order details. mainly used for applications where a low mass is
9、a design factor or nonmagnetic properties are required (e.g. in me- chanical engineering, precision engineering, optics, meas- urement and control engineering, electrical engineering, and applications in medicine). 1.4 See DIN 29783 for technical delivery conditions for titanium investment castings
10、for use in aerospace. 1.5 Titanium castings are to comply with the specifica- tions given in this standard unless particular fields are covered by other codes of practice (e.g. Technische Regeln Druckbehlter (Codes of practice for pressure vessels), Merkbltter der Arbeitsgemeinschaft Druckbehlter (i
11、n- struction sheets issued by the Pressure Vessels Study Group), Werkstoff-Leistungsbltter der Luftfahrt (Materials specifications for aviation). Exam p I es : A casting complying with this standard, made of a material identified by material designation G-Ti3Pd or material num- ber 3.7052, subject t
12、o the general tolerances for rammed graphite castings (GTA 1615): Casting DIN 17 865 - G-Ti3Pd - GTA 16/5 or Casting DIN 17865 - 3.7052 - GTA 16/5 A casting complying with this standard, made of a material identified by material designation G-TiAl6V4 or material number 3.7161, subject to the general
13、 tolerances for invest- ment castings (Dl): or Casting DIN 17 865 - 3.7161 - D1 Casting DIN 17865 - G-TiAi6V4 - D1 Continued on pages 2 to 6 uth Verlag GmbH, Berlin. has the exclusive right of sale for German Standards (DIN-Nonnen). DIN 17865 Engl. Price group Sales No. 0106 10.92 Page 2 DIN 17865 O
14、 I 2- O I 2- -4- O I z- O0 IO/ 12 VJ O I 6 O I E- O I z- O I =- + VJ I g- + LD I og + I II II II zg N 91 O0 II - II Y)LD =; :- - II f-xI I I II II 3q I I 1 II II II 5x1 I I II I II I I O Lo Lo “cy O s O 8 O O m %lo O I O Ca m Lo W I- O *) W 51“ c v1 m U - 7 7 m d 2.2 Essential order details The foll
15、owing order details are essential and have been marked where they appear in the text. 2.2.1 Quantity (e.g. number of items, mass or total length). 2.2.2 Name of product (casting). 2.2.3 DIN number (DIN 17865). 2.2.4 Material designation or number (cf.tables 1 and 2). 2.2.5 General tolerances for eit
16、her investment cast- ings or rammed graphite castings. 2.2.6 Type of DIN 50049 inspection document (ci. subclause 4.1). 2.2.7 In the case of third party inspection, the testing agency and, if applicable,any specifications to be complied with. 2.3 Optional order details The essential order details ma
17、y, if so agreed, be supple- mented by one or more of the following items, marked where they appear in the text. 2.3.1 0. Manufacturing process used (cf. subclause 3.1.2). 2.3.2 0. Chemical composition as determined by prod- uct analysis (cf. subclause 3.2.2). 2.3.3 0. Scope of testing (cf. subclause
18、 4.3). 2.3.4 0. Determination of strength,as measured on the: a) test bar taken from the gate; b) test bar cast separately; c) cast-on test bar; d) test bar taken from the casting. 2.3.5 Example of optional order detalls 150 castings complying with this standard, made of a ma- terial identified by m
19、aterial designation G-Ti3Pd or material number 3.7052, subject to the general tolerances for rammed graphite castings (GTA 16/5), where the strength has been measured on a test bar cast separately, to be supplied with a DIN 50049 - 3.1 B inspection document, shall be ordered as: 150 castings test ba
20、r cast separately - DIN 50 049 - 3.1 B DIN 17 865 - O-Ti3Pd - GTA 16/5 - 3 Requirements 3.1 Manufacturing process 3.1.1 Castings shall be produced from a material melted in avacuum arcfurnace,bythe investment casting orrammed graphite casting process. 3.1.2 0. If so agreed, the purchaser shall be in
21、formed of the manufacturing process used. 3.2 Chemical composition 3.2.1 Ladle analysis Table 1 shall apply for the chemical composition oftitanium, and table 2, for that of titanium alloys. 3.2.2 0. Product analysis A product analysis may be agreed at the time of ordering. Table 3 shall apply for t
22、he limit deviations for the product analysis from the limiting values specified for the ladle analysis. DIN 17865 Page 3 Table 3. Amounts by which the chemical composition as determined by product analysis may deviate from the limiting values specified for ladle analysis Element AI v Sn Zr Limiting
23、values as determined by ladle analysis, as in tables 1 and 2, as a percentage by mass 2.2 Mo si Fe 0,08 0,25 0,75 22 0,25 0,4 O N C H Pd Others Single Total 0,015 0,15 0,lO Limit deviation for product analysis I), as a percentage by mass f OJO f 0.20 1015 f 0,30 + i04 *0,20 + 0,05 1015 + 0,03 + 0,Ol
24、 + 0,02 + 0,002 - +0,02 + 0,02 + 0.05 1) If a number of product analyses are to be carried out, the deviations shown by an element within one cast shall lie either only above thc upper limit or below the lower limit of the range specified for the ladle analysis, but not both at the same time for one
25、 cast. 3.3 Mechanical properties The values of 0,2% proof strength, tensile strength and elongation at fracture at ambient temperature shall comply with the values given in tables 1 and 2, these being deter- mined on test bars as described in subclause 4.4. Verification of compliance of these proper
26、ties with the values specified shall only be required where acceptance inspection has been agreed, in which case determination shall be carried out on a test bar taken from a seperately cast test piece, unless otherwise agreed. 3.3.1 DIN 17 869 (at present at the stage of draft) provides additional
27、information on titanium alloys (e.g.with regard to elevated temperature properties, physical properties, cor- rosion resistance, metal-cutting and non-cutting forming, welding and other jointing processes). 3.4 Tolerances Tolerances on size and geometrical tolerances,and machin- ing allowances shall
28、 be in compliance with accuracy grade D1 as specified in the VDG-Merkblatt (VDG Instruction sheet) P690 in the case of investment castings, and with accuracy grade GTA16/5 as specified in DIN 1688 Part 1 in the case of rammed graphite castings. 3.5 Surface condition The surface condition of castings
29、 shall be as specified in DIN 1690 Part 1. Page 4 DIN 17865 4 Testing 4.1 Inspection documents 0. It may be agreed to supply castings complying with this standard along with a DIN 50049 inspection document. Where such is agreed, the certificate shall include the following particulars. 4.1.1 Test rep
30、ort (certificate DIN 50 049 - 2.2) a) Confirmation that the castings complywith the informa- tion given in the order. b) Results of the ladle analysis. 4.1.2 Inspection certificate i. In accordance with the scope of testing specified in subclause 4.3, the results of the following: a) ladle analysisl
31、); b) determination of hydrogen content); c) tensile test at ambient temperature. 2. Casting marking in accordance with clause 5. In the case of third party inspection, the testing agency and, if applicable, any specifications to be complied with, shall be given. 4.2 Size of batches 4.2.1 Test batch
32、 A test batch shall consist of castings manufactured under the same conditions, using the same electrode, and sub- mitted together for testing. 4.2.2 Heat treatment batch A heat treatment batch shall consist of castings having undergone the same heat treatment, it being permitted to include castings
33、 from several different test batches. 4.3 Scope of testing 4.3.1 0. Subject to agreement, the following tests shall be carried out on castings or material taken from the gate: a) one product analysis per batch 1; b) one tensile test at ambient temperature; c) one determination of hydrogen content pe
34、r heat treat- ment batch. 4.3.2 All castings shall be checked for dimensional accu- racy. 4.4 Sampling 00 One of the following types of test bar shall be agreed at the time of ordering: a) test bar taken from the gate; b) test bar cast separately; c) cast-on test bar; d) test bar taken from the cast
35、ing. 4.5 Test procedures 4.5.1 Chemical composition For both the ladle analysis and the product analysis, the content of the elements specified in tables 1 and 2 shall be determined by means of an accepted method. The hydrogen content shall be determined for the as deliv- ered condition. (certificat
36、e DIN 50 049 - 3.1 A, 3.1 B or 3.1 C) 4.5.2 Tensile test Tensile testing shall be carried out as described in DIN 50145 using DIN 50125 test pieces,increasing theload at a rate of 6 to 10 N/mm*.s,until the 0,29/0 proof strength is reached. 4.5.3 Acceptance inspection Flowcharts illustrating the proc
37、edures to be followed for acceptance inspection are given in figures 1 and 2. Castings which, when tested as described in subclauses 4.3.1 and 4.3.2, do not satisfy the requirements shall either be rejected or subjected to renewed inspection, or their defects permitted once to be corrected. 4.5.4 Co
38、rrective action The manufacturer shall have the right to correct any defects once,either before or after retesting,without cost to the pur- chaser (e.g. by heat treatment or sorting out).The batch so treated may be then submitted for renewed acceptance inspection. 4.5.5 Retests If a product or a bat
39、ch fails any of the tests, the manufactur- er shall be entitled to repeat the failed test on twice the number of test pieces taken from the same casting.All such test pieces shall then satisfy the requirements. Otherwise, the product or batch shall be deemed not to be in con- formance with the stand
40、ard and shall either be sorted out or submitted for renewed inspection after any defects or de- ficiencies have been corrected once. See figure l for pro- cedures to be followed. If, in the course of batch testing, a test unit is found to be unsatisfactory, a test unit comprising twice the number of
41、 test pieces may be taken from the relevant batch and sub- jected to testing as specified in subclauses4.3.1 and 4.3.2.1f one of the test pieces still fails any of the tests, any defects or deficiencies may be corrected once. If the test pieces continue to fail to satisfythe requirements, the batch
42、shall be deemed not to be in conformance with the standard, and shall not be resubmitted. However, the manufacturer and purchaser may agree that all units belonging to the same batch be tested individually. See figure 2 for procedures to be followed. 4.6 Invalid test results Test results that may be
43、 deemed to have been falsified by incorrect sampling, sample preparation or testing, or by an accidental and local defect in a test piece, shall not be counted. 5 Marking Marking of castings shall be as specified in DIN 1690 Part 1. 6 Packaging The requirements regarding packaging specified in DIN 1
44、690 Part 1 shall be complied with. 1) The results of the ladle or product analysis and the deter- mination of hydrogen content shall be stated in inspec- tion certificate B. Perform one test as in subclauses 4.3.1 and 4.3.2 on one batch. Renewed testing on twice the number of test pieces as specifie
45、d for the relevant test, taken from the same batch. DIN 17865 Page 5 I I I (cf. subclause 4.5.3) I I - Renewed acceptance inspection on two new test pieces. Corrective action Reject batch I S 1 I t I I I Accept batch. 1 I I I I I Reject batch Figure 1 Flowchart for acceptance inspection procedures (
46、batch testing) Perform one test as in subclauses 4.3.1 and 4.3.2 on one test piece (one unit). -I I I I I I Accept unit _ Reject unit Renewed testing on twice the number of test pieces as specified for the relevant test, taken from the same sample I isfacto- Figure 2. Flowchart for acceptance inspec
47、tion procedures (unit testing) Page 6 DIN 17865 Standards and other documents referred to DIN 1688 Part 1 Light metal alloy rough castings; sand castings; general tolerances and machining allowances DIN 1690 Part 1 Technical delivery conditions for castings of metallic materials; general DIN 17869 (
48、at present at the stage of draft) Properties of titanium and titanium alloys; additional information DIN 29783 Aerospace; titanium and titanium alloy precision castings; technical delivery conditions DIN 50049 Inspection documents for the delivery of metallic materials DIN 50 125 Test pieces for the
49、 tensile testing of metallic materials DIN 50 145 Tensile testing of metallic materials VDG-Merkblatt P6902) feingu; Matoleranzen, Bearbeitungszugaben (Investment castings; dimensional tolerances and machining allowances) Technische Regeln Druckbehlter Merkbltter der Arbeitsgemeinschaft Druckbehlter Werkstoi-Leistungsbitter der Luft- fahrt Explanatory notes The series of standards on titanium and titanium alloys has been restructured.The chemical composition of these materials is now dealt with in DIN 17850 and DIN 17 861, the technical delivery con
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