This standard specifies methods to reduce the sensitivity or degree of hydrogen embrittlement that may occur during surface finishing. The heat treatment processes specified in this standard can effectively reduce the sensitivity to hydrogen embrittlement. These heat treatment processes are carried out after surface finishing but before any secondary conversion coating process. Stress relief heat treatment processes used after machining but before surface finishing are specified in GB/T 19349. GB/T 19350-2003 Treatment of coated steel with metallic and other inorganic coatings to reduce the risk of hydrogen embrittlement GB/T19350-2003 Standard download decompression password: www.bzxz.net
This standard specifies methods to reduce the sensitivity or degree of hydrogen embrittlement that may occur during surface finishing. The heat treatment processes specified in this standard can effectively reduce the sensitivity to hydrogen embrittlement. These heat treatment processes are carried out after surface finishing but before any secondary conversion coating process. Stress relief heat treatment processes used after machining but before surface finishing are specified in GB/T 19349.

GB/T193502003/1S09588:1999
This standard is equivalent to 1S0958:1992 Metallic and other inorganic coatings for the treatment of alkali-free and low-ammonia hazardous composite steel (English version).
This standard is based on 1S9588:1S99 and is revised as follows: The previous international standard is cancelled:
In order to facilitate use, the Chinese standard that adopts the international standard is cited! The introduction of the normative reference document is added; "This standard\Gao glycoside" "This international standard", this standard is issued by the China Machinery Industry Federation: This standard is under the jurisdiction of the National Metallurgical and Non-metallic Coating Standardization Technical Committee, and the drafting unit of this standard is Wuhan Institute of Materials Protection. The main person in charge of this standard is: Yu Chang, Shangye Rongqiu, Zhang Ping, and the stable landing, GA/T19350-2003/1SO 95B8:1999 Introduction
Atomic hydrogen can enter and break aluminum and solid alloys, causing a reduction in their load-bearing capacity or cracking (usually microscopic cracks), or the alloy may become brittle when the applied stress is far below the alloy's service strength or even below the alloy's design strength. This process occurs when the alloy does not show any significant loss of toughness when subjected to conventional tensile tests. This phenomenon is usually called hydrogen embrittlement, hydrogen brittleness or hydrogen embrittlement. Cleaning, pickling, calcining, electroplating, autocatalytic treatment and corrosion reactions in material service can cause hydrogen to form in the alloy during processing, such as rolling. In forming, machining and drilling, the wrong selection of the right ingredients may lead to certain metal development: welding or over-heating can also cause you to be dissatisfied. Heat treatment reduces the atomic efficiency and (sensitivity) of the steel caused by tensile stresses generated by processing and subsequent surface finishing: the relationship between heat treatment and moisture resistance depends on the composition, structure, coating type and coating method. For most high-strength steels, the heat treatment effect decreases with the reduction of treatment time and the decrease of temperature. This standard applies to the requirements of the production method or processing technology, which are not included in the specification. 1 Scope GA/T 19350—2003/ISO 958A, 1999 Metallic and other inorganic coatings
Treatment of steel after coating to reduce the risk of hydrogen embrittlement This standard specifies methods for reducing the degree of oxygen susceptibility or insensitivity that may be introduced during surface treatment. Heat treatment processes specified in this standard are effective in reducing hydrogen susceptibility. These heat treatment processes are performed after surface finishing but before any secondary conversion coating process.
Stress relief heat treatment processes used after the coating process but before surface finishing are specified in Table B, Table 49. This standard does not apply to steel.
Note that the treatment does not necessarily have the beneficial effect of completely removing the fat. 2 Normative references
The following references contain the following references: The clauses become clauses of this standard through reference in this standard. For referenced documents with a date, all subsequent amendments (including the contents or revisions) are not applicable to this standard. However, the versions of these documents shall apply to all parts of this standard. For undated referenced documents, the latest version shall apply: CB: 313 Terminology related to residual rust and chemical treatment (S02079:198 and 1502080:1981) GB/29313-2003 Calcium iron pretreatment of gold base and other inorganic coatings to reduce the risk of ammonia embrittlement 3 Terms and definitions
This standard uses the definitions listed in GB/T 3138 and 9. 3.1 Except for the prospective heat treatment, the heat treatment that does not change the basic metal structure (re-repair and eliminate the film properties of the auxiliary parts) shall be carried out within a certain period of time without changing the basic metal structure. 4 Requirements: Heat treatment should be carried out to reduce the risk of the occurrence of layered metal development. Under any circumstances, each component should be heat treated only when the entire component reaches the specified temperature and the actual tensile strength or 1MMP should be achieved. (Corresponding hardness values ​​3HV10303HH or 31HR> should be heat treated, unless their elimination of virtual heat treatment is specified as ER core group: industry avoids the top treatment containing alkali or liquid cattle for cathodic treatment process. In addition, for the tensile strength higher than 140MP< corresponding hardness value 425HV _0. (HH or 43HRC) of the required film design, the anode rate of the electroplating liquid is selected, the table [listed in the mountain to eliminate the wax non-heat treatment, etc., can be specified by the purchaser according to Table 1 on the parts drawing or on the order, the supplier for the processing party to make provisions for the general and the party does not specify the elimination of the normative treatment, the industry shall use ER-1. 1, the treatment level of the evaluation should be based on the parts of the production process and the monthly experience of the sharing platform to determine the test, because the price and the station, the sales rate has changed due to the change of the effectiveness of the volume, the effectiveness of the parts, the average damage distance theorem includes the two modified performance of the service number of the parts treated by the customer is determined as EIR-G, Note 3: When the purchaser is not regular equivalent, the use of the longest thickness of the treatment limit - that is, a defect, can be currently, the bottom force or the second force is generally not controlled. Correct information about the correct elimination of some necessary processing effects, such as design-related stress reduction, etc., and treatments specified by the purchaser on the part drawing or material sheet. The unreasonable reasoning that causes the production of additional costs will lead to poor quality.
Correction 3: When the tablet can not be placed deep enough to reduce the absorption of the chest to the minimum GB/T19350-2003/1509588:19995 Elimination of empirical treatments, etc.
5.1 Except for surface-treated parts, the heat treatment process should be selected according to the actual tensile strength: If only the minimum tensile strength is given, or the tensile strength is not specified, the heat treatment process should be selected based on the actual tensile strength calculated from the relevant known or measured strength values. Strength or The torsion and tensile strength values ​​obtained by direct screening of known values ​​shall also be provided. Copper which has been completely or partially case hardened shall be classified according to the value of the carbonization of the surface. 5.2 If any test is required to verify the effectiveness of the treatment to eliminate the deterioration, the sampling and test methods to be used shall be specified. 6 Heat treatment after processing
6.1 Heat treatment shall be carried out as soon as possible (not more than 3 h) after surface finishing, preferably within 1 h after surface finishing: This heat treatment shall be carried out after surface finishing and before any cutting or other processing. For coatings requiring salt treatment, zinc and their alloys or any other coatings shall be heat treated before salt treatment: the exception is zinc-cobalt alloy coatings, which shall be subjected to deterioration heat treatment in the chemical shop. Note 1: When the humidity is greater than 66%, the formaldehyde-free layer will be changed from the steel body to the steel body, and will no longer have the "self-healing" characteristic. The single-sensitivity product can provide satisfactory blood protection in most human environments. Its specification will not be adjusted with adverse effects or tests. Note 2: 5. The time limit for the electrical selection and replacement of the corresponding protection items will be handled at the time of installation. 6.2 The process system listed in Table 1 and Figure 1 will be used to eliminate the intensity of the radiation. For the actual strength of the steel bar is less than 100MPa, no reverse heat treatment is required after the electric hook.
6.3 If the steel bar or the zinc-sensitive steel bar has any sharp or sharp edges or the steel bar thickness exceeds 25mm, the steel bar shall be heat treated immediately after the electric hook and the minimum heat treatment time shall be 25mm.
6.4 For the steel bar with actual tensile strength exceeding 18CDMP, the minimum duration of the heat treatment can be determined from Figure 1, [ = 0.02R.. -12
Where:
Shortest duration, hour (h); R.—internal tensile strength, unit is MPa. 6.5 For copper, copper or bearing copper, which is electroless plated or galvanized (partial or partial surface treatment), the heat treatment at a relatively high temperature will cause the surface to be unacceptably hard. However, the heat treatment time should not be less than 13 hours. This heat treatment should only be used for steel parts with actual tensile strength less than 1MPa. For parts of microstructured, electroless plated, zinc or its alloys, when the tensile strength is less than 1100MPa, the heat treatment time should be S51. The hardness of the steel is in the range of 1400MFa-120℃, which may have an adverse effect on the steel. Heat treatment at 440-483℃ will reduce the hardness of the steel layer. If this temperature has an adverse effect on the performance of the steel, such steel should not be treated in this way. The surface should be treated with a low temperature of 1SC-220℃. The heat treatment temperature of tempered steel parts is lower than that of solidification. Table 1 High-strength steel (except for heat treatment of 4, 5 and 6) Grades H, MPn, etc. are not as good as those required for heat treatment. See Note 1. I Fu: sR s.1 s00 tt 160.R.1700
: 60K,e*1 6on
1 4n R, *:1 500
I 3u.sRs1 dou
120R1300
1 1mR1 nn
190·~22U
190--220
150~-22c
192 201
19·-22c
153--22cwwW.bzxz.Net
177--205
1:--22
Most group time rate 1:/ h
KN-16A
ER-12-
ER-14*
HR-: E
cyst1()
Tensile strength of steel Hm/MPa
dsR_, Ic
I 25RI 523
1450≤Rs1 J00
1 000R.1500
Not sprayed Large-scale design and workpiece
U0USRSI 800
Surface hardening parts of 1101R.800
chain, reading, or their alloys Modern sample R1 4X
learning piece thickness 25m.
and abandoned in the production of account pattern or iron called trace
. Quoted from some countries' standards emperor recommended professional Just process, CB/T19350—2003/ISO9588:1999 wakefulness:
[--223
177.~26.5
196--225
177-- 205
1143~155
136-162
13 6~165
1535881990(K) In the middle and northern forecast h, the value is mostly 6.5 and compared with R-6, the item should be 22h24
1...·non-strict example;||tt ||2-Mandatory:
Real resistance control library
The most timetable is shown in 4)/
Figure 1 Heat treatment time at treatment temperature of 190℃～220℃-tensile Strength bending load
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.