JB/T 8709-1998 This standard specifies the ordering, manufacturing, product dimensions, test methods, inspection, and acceptance rules of large rolling mill frame castings. This standard is applicable to various types of rolling mill frame castings made of carbon steel. (Note: This standard is revised based on JB/ZQ 6027-86 "Large Rolling Mill Frame Castings".) JB/T 8709-1998 Large Rolling Mill Frame Castings JB/T8709-1998 Standard download decompression password: www.bzxz.net

IFS 77. 140. R
Machinery Industry Standard of the People's Republic of China
JB/T8709-.1998
Steel castings for thelarge rulling mill huusing1998-(13-19) Issued
National Bureau of Machinery Industry
19980701 Implementation
JB/F87091998
This standard is the international version A and the international version B of this standard. The research report of large rulling forgings of the machinery industry department of Pingman City is issued. The starting unit of this standard is the First Heavy Machinery Company. The drafters of this standard are: Hu Shoulin, Qiu Kangming, 1 Wangwei
Machinery Industry Standard of the People's Republic of China
Steel castings for thelarge rolllng nfll huusingJBt8709-1998
International proof of the ordering, manufacturing, product appearance and size test methods, acceptance specifications, etc. of large rolling mill rack parts: use ten types of steel machine rack parts. 2 Reference, use standard
If the international standard is adopted throughout the year, this standard shall be used as the reference for the wood type. When this standard is published, the edition shown in the wood shop has been revised. All parties should carefully consider the use of the following standards to confirm the latest version, which may be non-F22284
GB228-5～91
GE20R5
CB113=2-89
4.T1.- 1506664
J3/T (UU, 7-1S58
AIME0980
ASTM EUI-KO
3 Order requirements
Chemical analysis method and chemical composition tolerance of finished products
Silver and iron analysis method
Ollazine test method
One-piece casting performance
Allowed drawing quality assessment method
Model and technical system parts
Surface positive wave control test mark of carbon steel and low-content steel parts
3. The party who purchases the product shall specify the standard to be used in the ordering contract and the ordering agreement card. Standard materials. The technical requirements and driving items should be specified as well as the time and time of the order.
3.2 When ordering, the sample must be submitted and the product size, tolerance, surface test, missing position and size technical requirements
The steel machine frame can be made into a standard furnace with an electric furnace. If the same as the exciting party, it can also be used for deep metallurgy and damage: 4.1.2 Casting
When the steel bar machine needs to be made: it can be made with no internal cooling and internal cooling. Before changing the heat treatment, the art should be placed in the hospital. 4. 1. 3!
The standard should be fully understood by the fire, the catalog or ordering fire treatment period: when the specification or ordering technical conditions are specified for the heat treatment, the supplier should adopt the natural method in accordance with the law. 4.1.4 Coal outside
4.1.4.1 Defects allowed to be repaired by qualified personnel, 4.1.4.2 The repaired parts shall be scanned with the parts body: B5:7. 4.1.4.3 The welding process shall be carried out by qualified personnel. Approved by the Ministry of Industry on March 19, 1998
Implementation on July 0, 1998
4. 1. 5 1
The materials of the parts shall be processed by the relevant parties and the relevant processing or removal of the parts shall be carried out without the need for the effect of the south. 4.2 Chemical modification
Chemical modification shall be in accordance with the provisions of the support 1.
xs3u-:u
Maximum chemical composition
Ting: Modification drawing through 1, the fruit limit to the remaining elements of the North learning, 4.3 Mechanical properties of calcium heat treatment of the test specimens made in accordance with the provisions of Table 2, strength 2 Rong attack: Le small times)
20333 +5
4.4 The potential of the product
The whole pair of yarns, thorns, oxide scale and mouth should be +4.
4.4.2 The shape and size of the product should comply with the requirements of the drawing and ordering conditions. 4. 4.3 The size of the product can be calculated by the difference can be found on the card model table: the length is allowed to be full of difference
size! Minutes
Fill|±3.5
524--12
-200--40u 106--B00>801-1600 25c3--7159 2- 31: --512100-20c:
*n~-2n
Integral allowable difference
>4f- 5
2>25--50
F3--13
> Ifu-- 2u
164* 21:
2nc --400
2-#15~:5.30
*11G--6:0
JB/T8709-1998
4.4.1 The following is the length of the core as shown in Figure 2
>! ! The maximum allowable ripple is 4.4.5 The quality assessment of the standard shall comply with the provisions of GB/T1505. Too rough, it should not be measured by mouth. The following is the standard of the manufacturer: ! Not only is there an epidemic effect:
5! The table outside the standard can be allowed to exist in the same technical table. The effect of the trap outside the shrinkage gift, the real, one hole, etc., 3 table hundred defects are allowed to be used
tree community station
out of the board station
full of domestic limits, the value of the collection
to the natural south constant in urn
uorar within five, m: with
Jiang individual monk's beam with the total high heart may not be able to use the large time is a sure manager 4. 4. ± loss
4.4.7. Excess quotation
when the training goods technology case in the supermarket support deep price requirements when the decline except for the request A (standard do) to explore the work. 4.4.7.2 When the relevant technical requirements are for the depth of the test piece, the physical inspection can be carried out according to the appendix of the standard. 5 Test methods and detection rules 5.1 Chemical analysis test 5.1.1 For some parts that may be burned for two or more times, the weighted method is used for analysis of the depth. 5.1.2 Chemical composition analysis The test piece should be packed according to the requirements of GB222. It can also be analyzed separately. When the purchaser samples the parts, it should be carried out at the core part, not less than 6mm from the surface, but a certain depth is allowed. The difference shall be agreed upon by both parties.
51.3 Chemical composition and heat treatment are the same, 5.2
5.2.1 The shape and size of the test piece shall comply with the requirements (see 112). 5.2.2 The test piece and the central part shall be tested in the furnace. 5.2.4 The pull test shall be conducted at GP22% of the rated value:
5. 2. 4 When the force limit is not qualified, the supplier can wait for a test to be carried out again, and then the new heat treatment is carried out. After the test, the force of the pipe is in accordance with the provisions of this authorization. The heat treatment number shall not be delivered. 5.3 The shape and size of the small pull test shall be in accordance with the provisions of 4.4.2~4.4.6 or the provisions of 11352. 5.4 Push order insurance 5.4. Note: Magnetic potential inspection is allowed. The purchase of the insurance certificate B package can be carried out according to the current regulations of ASMF9. 5.4. 2 Ultrasonic late inspection
JR/T87191998
The ultra-high frequency inspection of parts sold shall be carried out in accordance with Appendix A. Refer to the provisions of ASIME6U for implementation. 5.5 Certificate Report
In addition to the analysis of finished products, the parts to be inspected include cold testing and aging inspection. The technical inspection department shall issue the following:
6 Supervision, rejection and review
For the benefit of the customer, our supervisor can provide the customer with a complete product inspection process, so that the customer can get the best of the routine work
6.According to the sampling of finished products, the supplier shall provide the test pieces of the casting cavity within 3 years after receiving the test pieces. The test pieces shall be kept in the factory after the product report is issued. 7. Quality certificate
When delivering the goods, the supplier shall provide the certificate card to the customer, and the quality certificate book shall include the following contents:) manufacturing name:
5) contract number:
t) product drawing number:
product material brand;
e) standard number:
smelting number:
》product
h) quality certificate or quality inspection station result. .) Periodic inspection results:
i) Processing specifications:
) The order contract can be supplemented with acid inspection technology requirements, 8 Marking, packaging
1 The processed surface of special parts should be marked or the factory certificate should be clear. 8.2 The back of non-processed parts should be rust-free.
8.3 The supplier should pack the returned parts according to the requirements. A1: Injury method
IB/T8709--19/8
Shenzhen Welcome A
(Appendix to the series)
The current regulation of ultrasonic flaw detection of large rolling mill frame is to use line selective flaw detection as three, and adopt direct wave detection when necessary. A2 flaw detection parts
should be filtered as follows
) not normal this impact or the detection collection, the book half service should be Y3℃ standard: h bottle year fire 0.5~z
detection situation with sensitivity change: frequency being detected time. Car detection surface bottom surface parallel to the filling purchase position report the second bottom policy: loss 3 ring micro-use high: horizontal method close to RB-1 said block production from the wave with the curve as the lower degree of efficiency examination line: compound: machine, installation disturbance or water wave end
) detection surface button degree: or batch work and R% cost elastic surface u reach material not stick code change damage price 1 damage time
deep special general car plus two positive heat treatment heart, 4 flaw detection pay
deep capital position such as soldier special specified, then light down the top retrograde, read the shape of the same, to take the capital similar mail guard! Figure: 1) The micro-surface can be sunken in the center of the cr half-gram 2m×mm right side, the full depth of the mother gift end, the diameter of the inner gift m) The thickness of the four parts of the window surface is 5cmmm, with a wave protection: c. If it is considered necessary to carry out a reading of the bad mother hole or a double deep head investment: only a millimeter, the A5 judgment standard
E) The window is not allowed to have 90% of the adjacent defects with a continuous wave scan of more than 2m, when the adjacent defects are large, it will run as a road.
) window: with the position of the allowable range, such as: : the cast probe: this trap meter indicator line is 6C% sensitivity parameter: card line, use half-wave high method to measure urine trap at night time fast trap large degree not next month 2m
J3/T8709--1998
Figure A: Ultrasonic flaw detection channel
usually outside the Xing chemical defects customer allowance insurance
jump electric travel makeup
SF:RJou
progress:: product protection stop to the work road
my defect
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no00mm
Jn:T709-1998
Appendix B
Dongjiang's double
magnetic radiography position
8 chain age detection position, the special meaning of the order element is as follows: the intention is to store the window surface back to the drawing position
: fixed in the middle of the two positions
flat under the sky, to receive the case of the protection department
buy BI magnetic detection position
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