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High-Strength Cold Rolled Steel Plate and Steel Strip with Phase Change Induced Plasticity
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Q/BQB 417-2009
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Basic data | Standard_ID | Q/BQB 417-2009 (Q/BQB417-2009; QBQB 417-2009; QBQB417-2009) | | Description (Translated English) | High-Strength Cold Rolled Steel Plate and Steel Strip with Phase Change Induced Plasticity | | Sector / Industry | Chinese Industry Standard | | Word Count Estimation | 4,000 | | Drafting Organization | BaoSteel Group | | Administrative Organization | BaoSteel Group | Q/BQB 417-2009: High-Strength Cold Rolled Steel Plate and Steel Strip with Phase Change Induced Plasticity
---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.
High-Strength Cold Rolled Steel Plate and Steel Strip with Phase Change Induced Plasticity
Baoshan Iron & Steel Co., Ltd. Enterprise Standard
TRIP cold rolled high strength steel sheet and strip
1 Scope
This standard specifies the cold forming cold transformation induced plasticity steel sheet and strip (hereinafter referred to as steel sheet and strip) the size of the outer
Shape, technical requirements, inspection and testing, packaging, marking and inspection documents.
This standard applies to Baoshan Iron & Steel Co., Ltd. manufactures a thickness of 0.50mm ~ 2.3mm cold-forming transformation induced
Plastic guide cold steel sheet and strip.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
All amendments (not including errata content) or revisions do not apply to this standard, however, encourage up according to the standard
Research into whether the parties to the agreement to use the latest versions of these documents. For undated references, the latest edition
Apply to this standard.
GB/T 222-2006 finished steel chemical composition and permissible variations
GB/T 223 steel and alloy chemical analysis method
GB/T 228-2002 metallic materials at room temperature tensile test method
GB/T 2975-1998 steel and steel products for mechanical testing and sample preparation position
GB/T 4336-2002 carbon steel and low alloy steel spark source atomic emission spectrometry method (conventional method)
Determination of GB/T 5028-2008 Metallic materials - Sheet and strip tensile strain hardening exponent (n value)
GB/T 8170-2008 revised value represents about rules and limit values and judgment
GB/T 20066-2006 Steel and iron - Sampling and determination of the chemical composition of the sample with a sample preparation method
GB/T 20123-2006 Steel - Determination of total carbon and sulfur content of the high-frequency induction furnace combustion infrared absorption method (often
Conventional methods)
GB/T 20125-2006 Determination of low-alloy steel by inductively coupled plasma atomic emission light multi-element content
Spectroscopy
GB/T 20126-2006 Determination of non-alloy steel of low carbon content - Part 2. induction furnace (preheated)
After the internal combustion infrared absorption method
Q/BQB 400 cold-rolled products, packaging, labeling and inspection documents
Size Q/BQB 401 cold rolling steel sheet and strip, shape, weight and tolerance
3 Terms and Definitions
3.1 transformation induced plasticity steel transformation induced plasticity steels (TR)
The microstructure of the steel is ferrite, bainite and retained austenite, wherein the content of residual austenite less than 5%. In a
Forming process, the retained austenite phase to the martensite can, because of its high rate of hardening, this steel has a higher
Uniform elongation and high tensile strength, tensile strength at the same level compared with duplex steels have higher elongation.
4 Classification and designation
4.1 steel grades and use shall comply with the requirements in Table 1.
Table 1
Trademark use
HC380/590TR
HC400/690TR
HC420/780TR
HC450/980TR
Structural parts, stiffeners, etc.
4.2 steel sheet and strip by surface quality distinction should meet the requirements of Table 2.
Table 2
Level code
More advanced surface finishing FB
Advanced surface finishing FC
5 Ordering information required
The user must provide the following information when ordering 5.1.
a) Product Name (steel or steel);
Baoshan Iron & Steel Co. 2009-01-08 Posted 2009-06-30 before implementation
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b) The product standards;
c) grades;
d) Product specifications and dimensions, roughness accuracy;
e) the edge of the state;
f) the level of surface quality;
g) packaging;
h) use;
i) Other.
5.2 If the contract does not indicate the order dimensional accuracy, surface quality level, the edge state and packaging, the product according to this standard
Common dimensional accuracy, FB-class surface quality trimming and trimming strip steel supply, according to the supplier to provide a packaging bag
Loading.
6. The size, shape, weight and tolerance
Steel sheet and strip size, shape, weight and tolerances shall comply with Q/BQB 401 of.
7 Technical Requirements
7.1 Designation and chemical composition
Designation and chemical composition of steel (melting analysis) shall meet the requirements of Table 3. Finished steel chemical composition tolerances shall comply
GB/T 222 requirements.
table 3
Chemical composition of a (Heat analysis)% (mass fraction)
Grade C
no greater than
Si
no greater than
Mn
no greater than
no greater than
Not more than Alt
HC380/590TR 0.30 2.2 2.5
HC400/690TR 0.28 2.0 2.0
HC420/780TR
HC450/980TR
0.30 2.2 2.5
0.090 0.015 0.015 - 2.00
a permit to add other alloying elements, but Ni Cr Mo < 1.5%, Cu < 0.20%.
7.2 Melting Method
Oxygen steel-killed steel smelting.
7.3 Delivery Status
7.3.1 After the steel sheet and strip cold rolling after annealing and smooth delivery.
7.3.2 usually coated steel sheet and strip oil supply, the film of oil should be used to remove an aqueous alkali solution. In conventional packaging, transportation, loading
By unloading and storage conditions, the supplier shall ensure that from the date of manufacture is completed within six months, the surface of the stainless steel sheet and strip. according to
The demand side, the agreement by both parties and specified in the contract, but also may not be coated with oil supply.
7.4 Mechanical Properties
Mechanical properties of the steel sheet and strip shall comply with the requirements of Table 4.
Table 4
Tensile tests a, b, c
Grade Yield Strength
RP0.2
MPa
tensile strength
R m
MPa
not less than
The Elongation
A80mm
not less than
n90
not less than
HC380/590TR 380 ~ 480 590 26 0.20
HC400/690TR 400 ~ 520 690 24 0.19
HC420/780TR 420 ~ 580 780 20 0.15
HC450/980TR 450 ~ 700 980 14 0.14
When using RP0.2 yield a clear no, otherwise use ReL.
b specimen of GB/sample, a sample of 228 T P6 direction to landscape.
c When the product is greater than the nominal thickness of 0.50mm, but less than or equal 0.70mm, allows the Elongation down 2 percent; nominal thickness when the product is not
Greater than 0.50mm, the Elongation allow fell 4%.
7.5 surface quality
7.5.1 steel sheet and strip surface may not have scars, cracks, inclusions and other use of harmful defects, steel sheet and strip not be partakers
Floor.
7.5.2 Each steel strip surface quality level characteristics and should meet the requirements of Table 5.
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table 5
Level code feature
More advanced surface finishing FB surface allows a small amount does not affect the moldability and coating, plating adhesion defects, such as minor scratches, indentation, pitting, roll mark and oxidation stains and other.
FC advanced surface finishing products in two faces better side no visible obvious defect, the other side must reach at least the requirements of FB.
7.5.3 For steel, because there is no opportunity to cut with a defective part, it allows a number of unusual part with, but there is lack of
The trap shall not exceed 6% of the total length of each volume.
8 inspection and testing
8.1 steel sheet and strip appearance was visually inspected.
8.2 steel sheet and strip size and shape suitable measuring tool application inspection.
8.3 n values within 10% to 20% strain range obtained by calculation, when the uniform elongation is less than 20%, the calculated strain region
Around 10% to the end of uniform elongation.
8.4 steel sheet and strip shall grant acceptance, the weight of each lot shall be not more than 30 tons in the same furnace number, same brand, same thickness specifications,
With steel sheet and strip heat treatment system components.
8.5 Number of samples of each batch of test items required for steel sheet and strip, and sampling methods, test methods shall be in accordance with Table 6.
8.6 For the tensile test and the strain hardening exponent (n - values), if a particular test results do not meet the standard requirements,
Then either take double the number of samples from the same batch retest the failed project. Retest results (including the project tests
All the indicators required) qualified, then the whole batch is qualified. Retest results (including all indicators of the project test required) even
There is an indicator of failure, then retest failed. As retest failed, already a test and the test results can not be a single piece of substandard
Acceptance, but a single piece of material without making the batch test may be resubmitted by piece and acceptance tests.
Table 6
Number of test specimens item (a) Test Method for Sampling method
Chemical analysis 1/each furnace GB/T 20066 GB/T 223, GB/T 4336, GB/T 20123, GB/T 20125, GB/T 20126
Tensile test 1/batch GB/T 228
Strain hardening exponent (n) 1/batch GB/T 2975 GB/T 5028
9 packaging, marking and inspection documents
Steel sheet and strip for packaging, labeling and inspection documents shall comply with Q/BQB 400's. For a party to have special packaging
Seeking, should be specified in the contract.
10 numerical rounding rules
Numerical rounding rules should comply with GB/T 8170's.
11 grades approximation control
The Standard Grade and Standard Grade abroad approximate comparison in Appendix A.
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Appendix A
(Informative)
The Standard Grade and Standard Grade abroad approximate table
Table A.1
Standard Q/BQB
417-2009
prEN
10338.2007
GMW
3399-2008
SAE
J2745-2007
HC380/590TR - CR 590T/380Y-TR TRIP 590T/380Y
HC400/690TR HCT690T CR 690T/410Y-TR TRIP 690T/400Y
HC420/780TR HCT780T CR 780T/440Y-TR TRIP 780T/420Y
HC450/980TR - - -
Additional information.
The reference standard SAE J2745-2007, GMW3399-2008, prEN10338.2007 establishment.
Appendix A of this standard is an informative annex.
The standard proposed by Baoshan Iron & Steel Co., Ltd. of technical quality.
This standard was drafted by the Baoshan Iron and Steel Co., Ltd. of technical quality.
Sun Zhongming drafters of this standard.
This standard is the first release.
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