江苏11选5走势图

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    冶金★知识

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    38CrMoAL合金★钢板38CrMoAL正火回火38CrMoAL现货定轧

    作者:李成13733919801 发布时间:2020/03/03 点击量:

    江苏11选5走势图
    38CrMoAl合金★结构钢板技术条件
    1、 本技术条件对应的工▲艺方案号为WKZ588-2013。
    2、 适用范围:本技术条件适用于厚度不大于80mm的合金★结构38CrMoAl钢板。
    3、 尺寸、外形、重量及允许偏差
    3.1、钢板的厚度偏差应符合GB/T709标准中B类规定 ,即限制厚度负偏差;-0.3mm ,厚度附加▆值为(正偏差+0.3)/2。
    3.2、钢板的尺寸、外形、重量及允许偏差应符合GB/T709的规定。
    4、技术要求
    4.1、冶炼方法:电炉+炉外精炼 ,钢液必须经过真空处理。
    4.2、化学成分(熔炼分析%)
        钢的化学成分应符合表1的规定。
    表1

    C Si Mn P S Cr Mo Al
    0.35~
    0.42
    0.20~
    0.45
    0.30~
    0.60
    ≤0.020 ≤0.015 1.35~
    1.65
    0.15~
    0.25
    0.70~
    1.10
    4.3、交货状态:高温回火。
    4.4、力学性能〓
    4.4.1、钢板高温回火状态下:HB≤260。
    4.4.2、检验ζ试样下料调质后的力学性能〓 ,性能〓指标应符合表2的要求。
    表2
    屈服强度 ,MPa 抗拉强度 ,MPa 延伸率 ,% 断面收缩率 ,% 常温AKU,J
    ≥835 ≥980 ≥14 ≥50 ≥71
    注:(1)拉伸性能〓检验ζ为横向;
       (2)冲击检验ζ为纵向。
     
    4.4.3、根据需方要求(并在合同中注明) ,钢板可检验ζ脱碳层深度 ,全脱碳层(铁素体)深度每面不得超过钢板公称厚度的2.5% ,两面之№和不超过4%。
    4.5、表面质量
    钢板的表面质量应符合GB/T11251-1989的规定。
    4.6、内部质量
    根据用户要求 ,钢板可按GJB1663A-2005进行探伤检验ζ并合格。
    5、取▓样方法、试样方法应符合GB/T11251-1989的规定。
    6、检验ζ规则:钢板应按批检查№和验ζ收 ,每批钢板由同一炉号、同一厚度、同一热处理制度的钢板组成。
    7、复验ζ规则:钢板的复验ζ规则应符合GB/T247-1997的规定。
    8、包装、标志及质量证明书
    钢板的包装、标志及质量证明书应符合GB/T247-1997的规定。
    Product Description:
    I. specification range of available steel plate: thickness: 8-650mm, width: 1500-4020mm, length: 4000mm-17000mm, single weight: 30.00t at most. Larger specifications of steel plates are also available as required.
    II. Types of steel plates available: carbon structural steel plate, low-alloy high-strength steel plate, steel plate for bridge, steel plate for building structure, steel plate for shipbuilding and offshore platform, steel plate for boiler and pressure vessel, steel plate for mould, steel plate for alloy structure, steel plate for oil and gas transmission pipeline, high-strength high toughness steel plate, corrosion-resistant steel plate, composite steel plate, wear-resistant steel plate, etc. more than 300 domestic and foreign Brand name.
    III. flaw detection standard: it can be produced and inspected in accordance with flaw detection standards at home and abroad, such as China (JB4730, GB / t2970, nb47013), the United States (a435, a577, a588), Japan (jisg0801, jisg0901), Germany (sel072), the United Kingdom (bs5996), France (nfs04-305).
    IV. it can be supplied according to GB / T, MCC, AISI / ASME / ASTM, JIS, DIN, NF, BS, en, ISO and other standards.
    V. heat treatment process: controlled rolling, normalizing, tempering, normalizing plus tempering, tempering, TMCP thermomechanical rolling, etc.
    Vi. the ship plate has been certified by DNV, ABC, GL, LR, BV, CCS, Rina, NK, Kr and other nine classification societies. The quality assurance system has passed the ISO9001-2000 standard certification.
    VII. Quality level: A, B, C, D, e, F and thickness directions z15, z25, Z35.

     

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