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Q/BQB 110-2023: Rolled square blank Q/BQB 110: Evolution and historical versions
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| Q/BQB 110-2018 | English | 190 |
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PDF similar to Q/BQB 110-2023
Standard similar to Q/BQB 110-2023 NMPA RULES66 Q/BQB 111 Q/BQB 113 Basic data | Standard ID | Q/BQB 110-2023 (Q/BQB110-2023) | | Description (Translated English) | Rolled square blank | | Sector / Industry | Chinese Industry Standard | | Classification of Chinese Standard | QBQ | | Word Count Estimation | 8,881 | | Date of Issue | 2023-04-09 | | Date of Implementation | 2023-07-01 | | Issuing agency(ies) | Baoshan Iron & Steel Co., Ltd. | Q/BQB 110-2018: Rolled square blank---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rolled square blank
Q/BQB 110-2018
Replace Q/BQB 110-2014
Rolling billet
Published on.2018-01-15
2018-04-10 implementation
release
Foreword
This standard is written in accordance with the requirements and format of GB/T 1.1-2009 "Standardization Work Guide Part I. Standard Structure and Compilation".
This standard is based on the characteristics of the company's products and processes.
Please note that some elements of this standard may involve patents. The issuing organization of this standard does not assume responsibility for identifying these patents.
This standard replaces Q/BQB 110-2014. Compared with Q/BQB 110-2014, the main changes of this standard are as follows.
- The normative reference document is modified to the latest version applicable, and the chemical composition analysis test method is deleted;
--Increase the specifications of the side lengths of 160 mm and 215 mm and their technical requirements, and remove the side lengths of 90 mm and 134 mm;
-- The side length of Table 1 allows for a tighter deviation;
-- Clause 5.1.1, "Steel grades and chemical composition (except for the welding rod and the steel for the welding wire are the finished components of the billet, the rest are smelting components)
It should comply with the relevant Baosteel enterprise standards or other standards. "" changed to "steel grade and chemical composition (except for welding rod and wire)
Steel is the finished component of the billet, the rest are smelting components) should meet the corresponding Baosteel enterprise standards, GB/T 669, GB/T 1591,
GB/T 3077, GB/T 1222, GB/T 6478 or other standards. ”
-- "In addition to the steel for the electrode and the low carbon steel billet, the billet should be inspected at low magnification. There should be no naked eye on the acid immersion low-power test piece.
See bubbles, white spots, cracks, skins, inclusions, residual shrinkage. "Change to "Besides boiling steel, billet should be low-profiled
an examination. There shall be no visible bubbles, white spots, cracks, tumbling, inclusions, residual shrinkage, gold on the acid immersion low-magnification test piece.
It is a foreign body. ", increase "central segregation is not greater than 2.5; general speckle segregation is not greater than 2.0; edge speckle segregation is not
Greater than 2.0";
-- Added requirements for non-metallic inclusions;
--The surface quality requirements are tightened. "The surface defects of the billet are allowed to be removed. The cleaning place should be smooth and angular, and the cleaning depth (in the same section)
Top) shall not be greater than 10% of the side length" modified to "the billet surface defect is allowed to be removed. The cleaning place should be smooth and without corners, cleaning depth
(on the same section) should be no more than 6% of the side length";
-- Modify packaging and marking requirements.
This standard was proposed by the Manufacturing Management Department of Baoshan Iron and Steel Co., Ltd.
This standard is under the jurisdiction of the Manufacturing Management Department of Baoshan Iron and Steel Co., Ltd.
This standard was drafted by the Manufacturing Management Department of Baoshan Iron and Steel Co., Ltd.
The main drafters of this standard. Xu Qing.
The previous versions of Q/BQB 110-2014 were released as follows.
--Q/BQB 110-1985, Q/BQB 110-1986, Q/BQB 110-1994, Q/BQB 110-1999, Q/BQB 110-2003,
Q/BQB 110-2009.
Rolling billet
1 Scope
This standard specifies the dimensions, shape, weight and allowable deviation of initial rolled billet and hot rolled billet, technical requirements, inspection and testing, packaging,
Signs and inspection documents, etc.
This standard applies to the primary rolled billet and hot rolled billet produced by Baoshan Iron and Steel Co., Ltd. for re-rolling or forging.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document.
For undated references, the latest edition (including all amendments) applies to this document.
GB/T 222-2006 steel finished product chemical composition tolerance
GB/T 226-2015 steel low-magnification structure and defect acid etching test method
GB/T 699-2015 high quality carbon structural steel
GB/T 1222-2016 spring steel
GB/T 1591 low alloy high strength structural steel
GB/T 1979-2001 structural steel low-fold tissue defect rating map
GB/T 3077-2015 alloy structural steel
GB/T 6478-2015 cold and cold extrusion steel
GB/T 10561-2005 Determination of non-metallic inclusions in steels - Standard s
GB/T.20066-2006 Sampling and sample preparation method for samples for determination of chemical composition of steel and iron
3 Information required for ordering
The user must provide the following information when ordering.
a) the company's standard number;
b) the brand number;
c) specifications;
d) weight;
e) Other special requirements.
4 size, shape, weight and tolerance
4.1 Dimensions and tolerances
4.1.1 The section size and allowable deviation of billet shall comply with the requirements of Table 1.
4.1.2 The billet with a side length of less than or equal to 140 mm has a normal length of 2 000 mm to 19 000 mm; the billet has a side length of 160 mm or more.
The billet has a typical length of 2 000 mm to 10 000 mm. Billets can also be delivered in fixed lengths and multiple lengths, and their length should be in the usual length range.
Within the enclosure, the allowable deviation is 0 to 70 mm.
Table 1 is in millimeters
Side length 100 120 130 140 160.200 210 215 225 230 250 260 280 300 320
Bian Changyun
Deviation
±2.0 ±2.0 ±2.0 ±4.0 ±4.0 ±5.0 ±5.0
diagonal
Length difference
≤3.5 ≤4.0 ≤4.5 ≤6.5 ≤8.0 ≤10 ≤14
Fillet radius 15 18 20 30 35 40 40
Note. The fillet radius is for hole design only.
4.2 Shape
4.2.1 The total curvature of the billet should not exceed 2.0% of the total length. The billet should not exceed the bend per meter.
Square side length ≤140 mm15 mm
Square side length ≥160 mm20 mm
4.2.2 The local width of the end of the billet due to shear deformation shall not be greater than 10% of the side length.
4.2.3 The billet shall not be significantly twisted.
4.2.4 The width of the billet at the maximum recess or maximum bulge shall not exceed the allowable deviation of the side length.
4.3 weight
The billet is delivered in actual weight.
5 Technical requirements
5.1 Brand and chemical composition
5.1.1 The grade and chemical composition of the steel (except for the welding rod and the steel for the welding wire are the finished components of the billet, the rest are smelting components) should meet the corresponding treasure
Steel enterprise standards, GB/T 669, GB/T 1591, GB/T 3077, GB/T 1222, GB/T 6478 or other standards.
5.1.2 Except for steel billets for welding wire, the allowable deviation of chemical composition of finished steel billet shall comply with the provisions of GB/T 222.
5.2 Smelting method
The steel is smelted by an oxygen converter or an electric furnace.
5.3 Delivery status
The billet is delivered in a hot rolled condition.
5.4 low-fold organization
In addition to boiling steel, billet should be inspected at low magnification. There shall be no visible bubbles, white spots, cracks, or visible on the acid-leached low-power test piece.
Flip, inclusions, residual shrinkage, metal foreign matter. The qualification level according to GB/T 1979 shall be. general looseness is not more than 2.5;
The center looseness is not more than 2.5; the ingot type segregation is not more than 2.5; the center segregation is not more than 2.5; the general spotted segregation is not more than 2.0.
Grade; edge spotted segregation is no more than 2.0.
5.5 Non-metallic inclusions
In addition to boiling steel, non-metallic inclusions should be inspected. Non-metallic inclusions shall be subjected to the A method according to the rating chart in GB 10561.
Inspection, the level should meet the requirements of Table 2.
Table 2
Inclusion type
Class A, Class B, Class C, Class D
Coarse fine series, fine line, fine line, fine line, fine line
Qualification level ≤2.0 ≤2.5 ≤2.0 ≤2.5 ≤2.0 ≤2.5 ≤2.0 ≤2.5
5.6 Surface quality
5.6.1 The end face of the billet shall not have shrinkage cavities, airbags, delamination and tail holes. The surface of the billet shall be free from cracks, crusting, inclusions, folding, cracking and
Ears.
5.6.2 The maximum depth of scratches, roll marks, pits, and pittings on the surface of the billet is 2 mm when the side length is ≤140 mm; the side length is ≥160 mm.
When 3 mm, the maximum depth of the surface of the billet is allowed to be 1 mm for side length ≤140 mm and 2 mm for side length ≥160 mm.
5.6.3 Surface defects on the billet are allowed to be removed. The cleaning place should be smooth and angular, and the cleaning depth (on the same section) should not be greater than the side length
6%, the cleaning width should be no less than five times the cleaning depth.
5.7 Other special requirements
According to the requirements of the purchaser, other projects can be inspected through agreement between the supplier and the buyer. The indicators are stipulated by the agreement between the supplier and the buyer.
6 Inspection and test
6.1 Dimensions and shape inspection
6.1.1 The size and shape of the billet shall be measured from the root with the appropriate gauge.
6.1.2 Measurement of side length. measure with the measuring tool at a distance of not less than 150 mm from the end of the billet along the vertical direction of the billet length, with the most
The large size is the side length value.
6.1.3 Length measurement. The distance between the end faces of the billet is measured along the side center line of the billet as the actual length of the billet.
6.2 Surface quality inspection
The surface quality of the billet is inspected with the naked eye.
6.3 Other inspection items
Other inspection items, sampling quantities, sampling methods and test methods for billet shall comply with the requirements of Table 3.
6.4 Batch rule
Billet should be inspected and accepted in batches. The gland steel billet is batched by the same brand and the product of the same section size. The calming steel billet is made of the same grade and the same
Product batch of furnace number and same section size.
table 3
Serial number test item sampling quantity sampling method test method
1 chemical composition 1/furnace GB/T.20066
Analysis according to the relevant product standards
method
2 low-fold organization 2/batch
Corresponding to different root billets of the ingot head;
Different billets for slab rolling
GB/T 226, GB/T 1979
3 non-metallic inclusions 2/batch of different steel billets GB/T 10561
6.5 Re-inspection and decision rules
If a test result does not meet the standard requirements, then double samples can be taken from the same batch for re-inspection of the unqualified item (if white)
Point, no retest). If the re-inspection result is unqualified, the whole batch may not be delivered.
7 Packaging, marking and inspection documents
7.1 Packaging
Billets with side lengths < 160 mm are bundled and delivered with packaging steel strips. Billets with a side length of ≥160 mm are not bundled and delivered one by one.
7.2 mark
Billets with a side length of < 160 mm in bundles are marked with a furnace number on each billet head, and the grades and bundle numbers are indicated at the end of the two billets in each bundle;
Square billets with side lengths ≥ 160 mm are marked with the grade at one end of each billet and the furnace number and billet segment number are indicated at the other end.
7.3 Inspection documents (quality certificate)
Each batch of billet must be issued with inspection documents proving that the batch meets the standard requirements and the order contract. The inspection documents should indicate the following.
content.
a) supplier name - Baoshan Iron and Steel Co., Ltd.;
b) the name of the buyer;
c) the date of issue of the inspection document;
d) the contract number;
e) brand;
f) standard number;
g) furnace number, number of roots, weight;
h) product name and specifications;
i) the test results specified in this standard;
j) Signature of the person in charge of the quality management department.
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