TU-14-1-1530-75
Ministry of Ferrous Metallurgy
USSR
AGREED: Deputy General Director AvtoVAZ N.I. Letchford |
APPROVED: Chief Engineer of Glavspetsstal MChM USSR V.S. Kultygin |
FORGINGS FROM STEEL AND ALLOYS FOR MACHINE PARTS
TECHNICAL SPECIFICATIONS
TU-14-1-1530-75
(replaces CMTU 14-91-69)
(Reissued taking into account Amendments Nos. I-II in 1999)
Holder of the original: TsSSM TsNIIchermet
The term of introduction is 01.09.76. For an unlimited period.
Agreed: Head of the Technical Department of Glavspetsstal MChM USSR A.M. Markelov Head of the Standardization Laboratory of the Central Research Institute of the Humanitarian Mechanics R.I. Kolyasnikova |
Developed by: Acting Chief Engineer of the Elektrostal Plant L.K. Kosyrev |
| Inv. No. | Sub. and date | Exchange inv. No. | Inv. No. duplicate. | Sub. and date |
1976
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These technical conditions apply to forgings made of steel and alloys, manufactured by open forging on presses. Forgings are intended for subsequent cold mechanical processing, or for subsequent hot mechanical processing (stamping, forging, rolling, etc.).
1. ASSORTMENT
1.1. Forgings are supplied in the form of round, square, rectangular cross-section bars, as well as in the form of washers without barrel-shape control made of steel and alloys of the following grades:
Open smelting
12XH2, 3X2B8F, X12M, 12X18H10T, 20X23H13 (EI319), 10X17H13M3T (EI432), XH78T (EI435), XH35BT (EI612), 23X2HBFA (EI659), 10X11H20T3P (EI696), XH38BT (EI703), XH60BT (EI868), 09X15H8YU (EI904), 06XH28MDT (EI943), 4X5B2FS (EI958), 10X11H23T3MP (EP33), XH28BMAB (EP126), 07X16H6 (EP288), XH30BMT (EP437), 4X5MF1C (EP572), 50H, 30X13, 40X13, 5XB2C, 12XH3A, 08X17H15M3T (EI580), XH77TYUR (EI437B), XH77TYURU (EI437BU), 08X15H25T2MFR (EP674), 5X2MHF (DI32)
Electroslag remelting
9X1-Sh, 14X17H2-Sh (EI268-Sh), 13X14H3B2FR-Sh (EI736-Sh), 12X25H16G7AP-Sh (EI835-Sh), 12X17G9AH4-Sh (EI878-Sh), 13X11H2B2MF-Sh (EI961-Sh), 11X11H2B2MF-Sh (EI962-Sh), 09X16H4B-Sh (EP56-Sh), 13X15H4AM3-Sh (EP310-Sh), 08X15H5D2TU-Sh (EP410U-Sh), 07X12HMBF-Sh (EP609-Sh), X12M-Sh, 5X2MNF-Sh (DI32-SH), P6M5-SH, P6M5Ф3-SH, 07X21Г7AH5-SH (EP222-SH), 15X16H2AM-SH (EP479-SH), 15X12H2MVFAB-SH (EP517-SH)
Vacuum arc remelting
ХН77ТЮРУ-ВД (ЭИ437БУ-ВД), XH77ТЮР-ВД (ЭИ437Б-ВД), XH35BTЮ-ВД (ЭИ787-ВД), 12X21H5Т (ЭИ811-ВД), 10X11H23T3MP-ВД (ЭП33-ВД), 10X18H10Т-ВД (ЭП502-ВД), XH67BMТЮ-ВД (ЭП202-ВД), 03H18K9M5T-ВД (ЭП637-ВД), 12X18H10Т-ВД, 03X11H10М2T-ВД (ЭП678-ВД), XH73MBТЮ-ВД (ЭИ698-ВД)
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Vacuum induction smelting
50N-VI, 79NM-VI, KHN50VMTYUB-VI (EP648-VI)
Vacuum induction melting followed by vacuum arc remelting
02N18K9M5T-ID (EP637A-ID).
By agreement of the parties, delivery of other grades of steel and alloys specified in the delivery specifications is permitted.
1.2. The dimensions of the supplied forgings, allowances and tolerances for dimensions are accepted in accordance with the press range and are stipulated in the specification agreed upon between the supplier and the consumer.
1.3. The curvature of forgings intended for subsequent hot mechanical processing must not exceed 6 mm per linear meter. The curvature of forgings intended for subsequent cold mechanical processing must not exceed the tolerance limits.
2. TECHNICAL REQUIREMENTS
2.1. In terms of chemical composition, steels and alloys must meet the requirements of GOSTs or technical conditions specified in the agreed specification.
2.2. On the surface of forgings intended for subsequent cold machining, local defects are allowed without removal if their depth, determined by control cutting and cleaning, is such that at least 25% of the nominal one-sided allowance remains for machining.
2.3. No cracks, films, nicks or tears are allowed on the surface of forgings intended for subsequent hot mechanical treatment. These defects must be removed by gentle cleaning or cutting with a cleaning width to depth ratio of at least 6. The cleaning depth must not exceed 20 mm per side. Small dents, ripples and individual small hairlines are allowed without cleaning.
When delivering machined forgings, defects at a distance of 100 mm from the end face that are not removed by continuous machining must be removed by gentle cleaning.
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2.4. Delivery of forgings of the rod type with spherical ends is permitted. The magnitude of sphericity and end obliquity are not controlled.
2.5. Mechanical processing of forgings at the supplier (stripping or cleaning) is performed depending on the configuration and purpose of the forgings and in accordance with the supplier's technology. The ends of the forgings are not processed after cutting on the press.
2.6. Forgings are supplied without heat treatment.
2.7. Forgings made of martensitic steel grades and alloys are subjected to softening annealing according to the supplier's regime. The need for annealing and the hardness of the metal in the delivery condition are stipulated in the agreed specification.
2.8. The macrostructure of steel or alloy, when tested on a transverse template cut from a reforged blank of 80-170 mm or from a supplied profile, should not have shrinkage looseness, bubbles, cracks, or slag inclusions visible without the use of magnifying devices.
The supplier is granted the right not to control the macrostructure, but to guarantee it within the scope of these technical conditions.
Metal from one heat that has passed the macrostructure test in large sections may not be subjected to this test when delivered in smaller sections.
2.9. In technically justified cases, forgings are checked for the absence of flakes and other internal defects using ultrasonic flaw detection. The need for ultrasonic flaw detection of forgings is established by the specification agreed upon by the parties.
2.10. The mechanical properties and long-term strength of the metal, determined on heat-treated samples cut from a reforged blank of 80-100 mm, must satisfy the standards of the relevant GOSTs or technical specifications.
The need to check mechanical properties, as well as GOST and TU standards for mechanical properties, are indicated in the agreed specification.
3. ACCEPTANCE RULES AND TEST METHODS
3.1. Forgings are presented for acceptance in batches consisting of one heat.
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3.2. The supplier shall provide a chemical analysis of each heat of steel or alloy.
3.3. All forgings are individually subjected to size and surface condition control.
The diameter and ovality of round forgings with a diameter greater than 200 mm, the sides and diagonals of square and rectangular forgings with a cross-section greater than 200 mm are measured at a distance of at least 100 mm from the end, and greater than 300 mm are measured at a distance of at least 150 mm from the end.
3.4. Dimensions are controlled by universal measuring instruments.
3.5. The absence of defects on the surface is checked by external inspection of forgings without the use of magnifying devices.
3.6. The hardness of the metal in the delivery condition is determined on one forging of any name in the annealing batch. The hardness is determined using the Poldi device or other methods with conversion to the diameter of the indentation according to Brinell.
3.7. The macrostructure is controlled on one transverse template from the melt. When controlling the macrostructure in a blank of 80-100 mm, the template is etched according to the supplier's method. Control of the macrostructure in the supplied profile is carried out on the ground surface without etching. In doubtful cases, local etching is used.
3.8. Control of mechanical properties and long-term strength of metal is carried out on two samples from the melt for each type of test, cut from a reforged blank of 80-100 mm.
3.9. Tests of mechanical properties at normal temperatures are carried out according to GOST 1497, at elevated temperatures according to GOST 9651.
The cutting of control samples is carried out in accordance with GOST 7564. Long-term strength tests are carried out in accordance with GOST 10145.
3.10. Sampling for determination of chemical composition is carried out in accordance with GOST 7565. Determination of chemical composition is carried out in accordance with GOST 12344, GOST 12365, GOST 28473 or another method that ensures the required accuracy of determination established by standards.
Arbitration chemical analysis of steel or alloy is carried out according to GOST 12344 and GOST 12365.
To conduct a chemical analysis, one sample is taken from the melt.
3.11. The method of ultrasonic flaw detection of forgings and rejection standards are agreed upon with the manufacturer of the forgings.
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4. MARKING AND DOCUMENTATION
4.1. On one end (for rod-type forgings) or on the side surface (for washer-type forgings) of each forging, a stamp indicating the steel or alloy grade, melt number, and ingot number must be stamped. If necessary, stamping with the forging number (code) is performed. Stamping with the conventional designation of the steel (alloy) grade is permitted.
4.2. Each batch of forgings is accompanied by a quality document indicating: steel or alloy grade, melt number, chemical composition, forging dimensions, batch weight, results of all types of testing, and the number of these technical specifications.
4.3. The quality document must be signed by the quality control department of the supplier company.
4.4. Electroslag and vacuum arc melting include ingots smelted from the same initial melt. When delivering forgings from ESR and VAR metal, the ESR and VAR melt numbers, as well as the initial melt number, are entered in the quality document. Forgings are marked accordingly with the letters: from ESR metal - "Ш", from VAR metal - "ВД", from vacuum induction melting metal - "VI", from vacuum induction melting metal with subsequent vacuum arc remelting - "ID".
In electroslag remelting furnaces, where two or three consumable electrodes of the initial melt can be remelted (pair or triple assembly), consumable electrodes from two or three initial melts are permitted to be assembled. In this case, the numbers of these melts are entered into the quality document.
5. PACKAGING, TRANSPORTATION AND STORAGE
5.1. Packaging, transportation and storage in accordance with GOST 7566.
The examination was carried out by the Central Scientific Research Institute of Ferrous Metallurgy: « 2 » 03 1999 Deputy Director of the Center for Standardization and Certification of Metal Products V.D. Khromov |
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Appendix No. 1
Reference
List of NTDs referenced in the text of the TU
| NTD designation | The number of the item that contains the link |
GOST 1497-84 GOST 7564-73 GOST 7565-81 GOST 7566-94 GOST 9651-84 GOST 10145-81 GOST 12344-88 GOST 12345-88 GOST 12346-78 GOST 12347-77 GOST 12348-78 GOST 12349-83 GOST 12350-78 GOST 12351-81 GOST 12352-81 GOST 12353-78 GOST 12354-81 GOST 12355-78 GOST 12356-81 GOST 12357-84 GOST 12358-82 GOST 12359-81 GOST 12360-82 GOST 12361-82 GOST 12362-79 GOST 12363-79 GOST 12364-84 GOST 12365-84 GOST 28473-90 |
3.9 3.9 3.10 5.1 3.9 3.9 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 3.10 |
