鋼板BW400寶鋼供應薄規格耐磨鋼

Q/BQB 613—2018 Q/BQB 613－2018 Supersedes BZJ 613－2013 English Version Abrasion resistant steel plates for engineering machine Q/BQB 613—2018 I Foreword This standard is drafted in accordance with the rules given in the GB/T 1.1—2009 (Directives for standardization-Part1: Structure and drafting of standards). This standard is drafted according to the market demand and considering the practical condition of Baosteel. This standard replaces BZJ 613－2013 in whole. In addition to a number of editorial changes, the following technical deviations have been made with respects to the BZJ 613－2013 (the previous edition). ——Add reference GB / T 20125 and the dated GB/T 2975 in normative references; ——Change ”BHARDY” to ”B-HARD” of the steel grade; ——Modify the requirements of the flatness; ——Strengthen the upper limit of the surface Brinell Hardness for B-HARD500; ——Clarify the sampling position of impact specimens; ——Adjust the grouping mass of mechanical property and process performance. The annex A is informative. This standard was jointly proposed by Manufacturing Management Department. This standard was jointly prepared by Manufacturing Management Department. This standard is under the jurisdiction of Manufacturing Management Department,this standard is the direct responsibility of Manufacturing Management Department. This standard was drafted by: Huang jinhua. This edition has been approved on Jan.15, 2018, and validated on Apr.10, 2018. The Chinese text of this standard shall be deemed the original. The English version is only for information. In the event of any dispute or misunderstanding as to the interpretation of the language or terms of this specification, the Chinese language version shall be prevail. Q/BQB 613—2018 1 Abrasion resistant steel plates for engineering machine 1 Scope This standard specifies dimensions, shape, technical requirements, testing and inspection, marking, and inspection certificate of abrasion resistant steel plates for engineering machine. This standard is applicable to the abrasion resistant steel plates for engineering machine manufactured by BAOSTEEL. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy GB/T 229 Metallic materials – Charpy pendulum impact test GB/T 231.1 Metallic materials – Brinell hardness test – Part 1: Test method GB/T 2970 Method for ultrasonic testing of thicker steel plates GB/T 2975-1998 Steel and Steel Products-Location and Preparation of Test Pieces for Mechanical Testing GB/T 4336 Carbon and Low-Alloy Steel - Determination of Multi-Element Contents - Spark Discharge Atomic Emission Spectrometric Method (Routine Method) GB/T 20066 Steel and Iron: Sampling and Preparation of Samples for the Determination of Chemical Composition GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method) GB/T 20125 Low-Alloy Steel - Determination of Multi-Element Contents - Inductively Coupled Plasma Atomic Emission Spectrometric Method Q/BQB 600 General technical requirements for steel plates 3 General technical requirements Unless there have other specifications by this standard, the steel plates delivered by this standard shall comply with the corresponding requirements of Q/BQB 600. 4 Classification and Code The steel grade, quality class, nominal thickness and application of the steel plates are shown in Table 1. Table 1 Steel grade Quality class Nominal thickness mm Application B-HARD360 A B C D E ≤100 Applied in mining, construction, and agricultural engineering machines that require high strength and high wear resistance, such as bulldozers, loaders, excavators, dump trucks and various mining machinery. B-HARD400 B-HARD450 B-HARD500 5 Dimensions, shapes, mass The flatness tolerances of steel plate shall comply with the requirement in Table 2. Dimensions shapes, mass Q/BQB 613—2018 2 and permissible tolerance shall be in accordance with the requirements of Q/BQB 600. Table 2 Nominal thickness mm The flatness tolerances for the length measured as 1000, not more than mm ≤15 12 ＞15 to 20 9 ＞20 6 6 Technical requirements 6.1 Steel grade and chemical composition 6.1.1 The steel grade and the chemical composition (heat analysis) shall comply with the requirement in Table 3. 6.1.2 The permissible deviations of chemical composition shall be in accordance with the requirement given in GB/T 222. Table 3 Steel grade Chemical composition a (heat analysis) % C Si Mn P S Cr Ni Ti Mo Alt B B-HARD360 ≤0.20 ≤0.60 ≤1.60 ≤0.025 ≤0.015 ≤0.80 ≤0.50 ≤0.05 ≤0.50 ≥0.015 ≤0.005 B-HARD400 ≤0.22 ≤0.70 ≤1.60 ≤0.025 ≤0.010 ≤1.00 ≤0.70 ≤0.05 ≤0.50 ≥0.015 ≤0.005 B-HARD450 ≤0.26 ≤0.70 ≤1.60 ≤0.020 ≤0.010 ≤1.10 ≤0.80 ≤0.05 ≤0.55 ≥0.015 ≤0.005 B-HARD500 ≤0.30 ≤0.70 ≤1.60 ≤0.020 ≤0.010 ≤1.20 ≤1.00 ≤0.05 ≤0.60 ≥0.015 ≤0.005 A Other alloying elements can be added if required. When Cu and As are treated as residual elements, they should meet Cu ≤ 0.30% and As ≤ 0.08%. The analysis is not necessary if the results can be guaranteed by the manufacturer . 6.2 Delivery condition The steel plate is delivered in a quenched condition or a quenched and tempered condition. 6.3 Mechanical property and process performance 6.3.1 The impact property and the surface hardness of steel plate shall be in accordance with the reqiurement given in Table 4. 6.3.2 The value of Charpy absorption energy shall be taken from the average of three test pieces. It is acceptable that one out of three test values is lower than the specified value but not less than 70% of the specified value. 6.3.3 Charpy impact test is only applicable to the steel plate with thickness not less than 6 mm. When the impact test is made on the steel plate with thickness not less than 12 mm, the standard specimen of test shall be 10.0 mm×10.0 mm×55 mm , and the test results shall comply with the specified values in the table; When the impact test is carried out on steel plate with thickness not less than 6 mm but less than 12.0 mm, the auxiliary specimen shall be 7.5 mm×10.0 mm×55 mm or 5.0 mm×10.0 mm×55 mm , and the test results shall not be less than 75% or 50% of the specified values given in the table, respectively. 6.3.4 If the result of Charpy impact test does not meet the specified requirements, three other test pieces may be taken on the same sampled product for testing. At this time, the average value of these six test pieces should not be less than the specified value. No more than two out of six values are allowed to be less Q/BQB 613—2018 3 than the specified value, and only one value is allowed to be less than 70% of the specified value. Table 4 Steel grade Quality class Impact test a Surface Brinell hardness b HBW Temperature ℃ Impact absorption energy KV2 , J B-HARD360 A - - 330 to 390 B +20 ≥20 C 0 D -20 E -40 B-HARD400 A - - 370 to 430 B +20 ≥20 C 0 D -20 E -40 B-HARD450 A - - 420 to 480 B +20 ≥20 C 0 D -20 E -40 B-HARD500 A - - 470 to 530 B +20 ≥20 C 0 D -20 E -40 a Longitudinal specimen is taken for the impact test. b The hardness value is the average of three test results in one group. 6.4 Special requirements 6.4.1 According to the requirement of purchaser, upon agreement between the manufacturer and the purchaser indicated in the order, the steel plate may be examined by ultrasonic test to each sheet individually. The ultrasonic examination method shall be in accordance with GB/T 2970, and the qualification level shall be agreed in the contract. 6.4.2 According to the requirement of purchaser, upon agreement between the manufacturer and the purchaser indicated in the order, carbon equivalent and tensile test or other requirements can be requested for the steel plate. 7 Inspection and testing 7.1 When selecting the specification of inspection and test, the type of inspection documents shall comply with the requirements from 7.2 to 7.4. 7.2 The number of test pieces, the sampling method and the test method required by the inspection items Q/BQB 613—2018 4 for each test unit of steel plate shall comply with the requirements of Table 5. Table 5 No. Test item Number of specimen Sampling method b Test method 1 Chemical analysis a 1 per heat GB/T 20066 GB/T 223, GB/T 4336, GB/T 20123, GB/T 20125 or general method 2 Impact test 1 set (3 pieces) Thickness ≤40mm, see Figure A11 a） Thickness ＞40mm, see Figure A11 b） GB/T 229 3 Hardness test 1 (Measure 3 points) The sampling position is the 1/4 width of the steel plate.The measurement shall be carried out on the surface with the removal of 0.5 to 2 mm. GB/T 231.1 a At the time of arbitration, the test method shall comply with GB/T 223. b The sampling shall be as close as possible to the specified sampling position when the sampling at the position is not feasible. 7.3 Sampling frequency 7.3.1 Sampling frequency for chemical analysis Heat analysis shall be adopted for the chemical analysis to each heat individually. 7.3.2 Sampling frequency of impact test and hardness test Each test unit shall consist of the steel plates of the same heat number, same grade, same thickness, and same delivery condition with a weight of no more than 50 tons. 7.3.3 Upon agreement between the manufacturer and the purchaser, the rule of setting test unit may be additionally determined. 7.4 Re-inspection of impact test If the results of the impact test do not meet the specified requirements, the single steel plate that has been tested but failed cannot be accepted, but the other steel plates with the same thickness as the sampled product shall be subjected to impact test and accepted individually. The steel plate with other thicknesses shall be set as a new test unit and submitted for the impact test and acceptance. 8 Annex The comparison table of steel grades between this standard and the previous version is given in Annex A (informative). Q/BQB 613—2018 5 Annex A (informative) The comparison table of steel grades between this standard and the previous version Table A.1 Q/BQB 613－2018 BZJ 613－2013 B-HARD360 BHARDY360 B-HARD400 BHARDY400 B-HARD450 BHARDY450 B-HARD500 BHARDY500