CN116254450A - 一种低成本结构用钢的生产方法 - Google Patents
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- C22C33/04—Making ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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Abstract
本发明公开了一种低成本结构用钢的生产方法，涉及钢铁生产技术领域，采用转炉冶炼、LF脱硫合金化，RH真空处理，经连铸浇铸得到低倍组织满足曼标2级或更好的铝镇静钢；通过高温奥氏体化技术，充分发挥合金强化作用，采用轧制冷却技术，得到以铁素体珠光体、贝氏体为主的混合组织类型，产品经性能检验，强度与韧性匹配良好，满足了客户性能要求，降低了生产成本。
Description
技术领域
本发明涉及钢铁生产技术领域，特别是涉及一种低成本结构用钢的生产方法。
背景技术
随着我国经济发展，钢材用量日益增加，钢厂规模也日益壮大。目前，我国粗钢产量达到10亿吨以上，约占世界钢产量的60%，钢铁业的发展也促进了我国钢厂之间的激烈竞争，同时钢材质量也稳定提升。
处于长江经济带区域的钢厂，地理优势明显，但缺乏矿山，原料进口，出口运输成本给企业对外竞争带来巨大压力。发展低成本高质量的品种合金钢出口，对企业站稳世界供应链中重要环节至关重要。
发明内容
本发明针对上述技术问题，克服现有技术的缺点，提供一种低成本结构用钢的生产方法，包括以下步骤：
S1、铁水出铁后导入铁水罐中进行运输，加入活性石灰800～1000kg进行脱硫；
S2、铁水扒渣后入转炉冶炼，转炉温度1640～1680℃，终点C：0.050%～0.12%，终点P≤0.030%，进行出钢作业；
S3、LF炉进行测温、取样后，采用碳化硅脱氧，脱氧8～10min，达到白渣要求进行合金化；
S4、合金化后钢水吊运至连铸进行浇铸，过热度20～30度，浇铸速度0.6～1.3m/min；
S5、坯料表检合格送至加热炉，奥氏体化温度1200～1250度，采用常规轧制，终轧温度780～850度，返红温度550～650度；
S6、钢板剪切、标识、表检合格后入库发货。
本发明进一步限定的技术方案是：
前所述的一种低成本结构用钢的生产方法，铁水罐最大容量300吨。
前所述的一种低成本结构用钢的生产方法，钢的化学成分及质量百分比如下：C：0.15%～0.20%，Si：0.15%～0.35%，Mn：0.80%～1.10%，P：0.030%，S：0.020%，Nb≤0.060%，Ti：0.020%～0.030%，余量为Fe和不可避免的杂质。
前所述的一种低成本结构用钢的生产方法，钢的化学成分及质量百分比如下：C：0.15%～0.18%，Si：0.25%～0.35%，Mn：0.90%～1.10%，P：0.030%，S：0.020%，Nb≤0.060%，Ti：0.020%～0.026%，余量为Fe和不可避免的杂质。
前所述的一种低成本结构用钢的生产方法，钢的化学成分及质量百分比如下：C：0.17%～0.20%，Si：0.15%～0.25%，Mn：0.90%～1.10%，P：0.030%，S：0.020%，Nb≤0.060%，Ti：0.023%～0.030%，余量为Fe和不可避免的杂质。
前所述的一种低成本结构用钢的生产方法，产品金相组织为以铁素体珠光体、贝氏体为主的混合组织类型。
本发明的有益效果是：采用转炉冶炼、LF脱硫合金化，RH真空处理，经连铸浇铸得到低倍组织满足曼标2级或更好的铝镇静钢；通过高温奥氏体化技术，充分发挥合金强化作用，采用轧制冷却技术，得到以铁素体珠光体为主的组织类型，满足产品的强度与韧性匹配，满足客户产品的性能要求。钛元素在合金中属于价格最便宜的元素，采用高钛元素设计出口产品成本最低，对钛退税的超低本制造进行不断研发生产高质量含钛薄规格的合金钢，能够为企业在国际钢铁行业的进一步发展提供强有力的保障。
附图说明
图1为实施例1产品的厚度方向金相组织图。
实施方式
实施例
本实施例提供的一种低成本结构用钢的生产方法，具体包括以下步骤：
S1、铁水出铁后导入铁水罐中进行运输，铁水罐最大容量300吨，加入活性石灰900kg进行脱硫；
S2、铁水扒渣后入转炉冶炼，转炉温度1668℃，终点C：0.090%，终点P：0.023%，进行出钢作业；
S3、LF炉进行测温、取样后，采用碳化硅脱氧，脱氧9min，达到白渣要求进行合金化；
S4、合金化后钢水吊运至连铸进行浇铸，过热度26度，浇铸速度0.9m/min；
S5、坯料表检合格送至加热炉，奥氏体化温度1210度，采用常规轧制，终轧温度798度，返红温度590度；
S6、钢板剪切、标识、表检合格后入库发货。
实施例
本实施例提供的一种低成本结构用钢的生产方法，具体包括以下步骤：
S1、铁水出铁后导入铁水罐中进行运输，铁水罐最大容量300吨，加入活性石灰950kg进行脱硫；
S2、铁水扒渣后入转炉冶炼，转炉温度1672℃，终点C：0.11%，终点P：0.023%，进行出钢作业；
S3、LF炉进行测温、取样后，采用碳化硅脱氧，脱氧10min，达到白渣要求进行合金化；
S4、合金化后钢水吊运至连铸进行浇铸，过热度22度，浇铸速度1.1 m/min；
S5、坯料表检合格送至加热炉，奥氏体化温度1242度，采用常规轧制，终轧温度840度，返红温度570度；
S6、钢板剪切、标识、表检合格后入库发货。
将实施例1、实施例2获得的产品进行力学性能测试，结果如下表：
采用钛合金替代铌铁进行细化组织晶粒的设计思路，通过洁净钢冶炼工艺及常规轧制技术，获得了以铁素体珠光体、贝氏体为主的混合组织类型，产品经性能检验，强度与韧性匹配良好，满足了客户性能要求，降低了生产成本。
除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本发明要求的保护范围。
Claims (6)
1.一种低成本结构用钢的生产方法，其特征在于：包括以下步骤：
S1、铁水出铁后导入铁水罐中进行运输，加入活性石灰800～1000kg进行脱硫；
S2、铁水扒渣后入转炉冶炼，转炉温度1640～1680℃，终点C：0.050%～0.12%，终点P≤0.030%，进行出钢作业；
S3、LF炉进行测温、取样后，采用碳化硅脱氧，脱氧8～10min，达到白渣要求进行合金化；
S4、合金化后钢水吊运至连铸进行浇铸，过热度20～30度，浇铸速度0.6～1.3m/min；
S5、坯料表检合格送至加热炉，奥氏体化温度1200～1250度，采用常规轧制，终轧温度780～850度，返红温度550～650度；
S6、钢板剪切、标识、表检合格后入库发货。
2.根据权利要求1所述的一种低成本结构用钢的生产方法，其特征在于：铁水罐最大容量300吨。
3.根据权利要求1所述的一种低成本结构用钢的生产方法，其特征在于：钢的化学成分及质量百分比如下：C：0.15%～0.20%，Si：0.15%～0.35%，Mn：0.80%～1.10%，P：0.030%，S：0.020%，Nb≤0.060%，Ti：0.020%～0.030%，余量为Fe和不可避免的杂质。
4.根据权利要求3所述的一种低成本结构用钢的生产方法，其特征在于：钢的化学成分及质量百分比如下：C：0.15%～0.18%，Si：0.25%～0.35%，Mn：0.90%～1.10%，P：0.030%，S：0.020%，Nb≤0.060%，Ti：0.020%～0.026%，余量为Fe和不可避免的杂质。
5.根据权利要求3所述的一种低成本结构用钢的生产方法，其特征在于：钢的化学成分及质量百分比如下：C：0.17%～0.20%，Si：0.15%～0.25%，Mn：0.90%～1.10%，P：0.030%，S：0.020%，Nb≤0.060%，Ti：0.023%～0.030%，余量为Fe和不可避免的杂质。
6.根据权利要求1所述的一种低成本结构用钢的生产方法，其特征在于：产品金相组织为以铁素体珠光体、贝氏体为主的混合组织类型。
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