CN105648321A - 一种制桶用热镀锌钢带生产工艺 - Google Patents
一种制桶用热镀锌钢带生产工艺 Download PDFInfo
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
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Abstract
本发明涉及一种制桶用热镀锌钢带生产工艺,属于冶金行业镀锌钢带技术领域。技术方案是:化学成分质量百分比:C:≤0.07%,Si:≤0.025%,Mn:≤0.25%,P≤0.025%,S≤0.020%,Als:0.015~0.065%,T[O]:≤30ppm,T[N]:≤30ppm,其余为铁和不可避免的夹杂,工艺步骤:(1)转炉冶炼终点质量百分比:C:0.03~0.07%、P≤0.020%、S≤0.015%;(2)热轧终轧温度885~905℃,卷取温度685~725℃;(3)冷轧总压下率控制在70%~85%;(4)连续退火炉炉内板温670~700℃。本发明的有益效果是:降低生产成本,提高产品性能,满足使用要求。
Description
技术领域
本发明涉及一种制桶用热镀锌钢带生产工艺,属于冶金行业镀锌钢带生产技术领域。
背景技术
目前,镀锌钢带产品中并没有专门用于生产镀锌桶料的钢种,热镀锌钢带制桶加工过程中,需要接受冲环和弯曲折边变形,要求材料具有良好的冲压及变形能力。
常规桶料普遍采用DQ级镀锌产品,该产品作为制桶料存在如下问题:
(1)该产品成分质量百分比C:≤0.03%,Si:≤0.020%,Mn:≤0.20%,P≤0.020%,S≤0.020%,其中C元素含量较低,炼钢生产成本相对CQ级产品高50-100元;
(2)镀锌工序退火温度高,生产成本约提高50元;
(3)DQ级镀锌产品主要用于冲压,用于制桶无法完全利用DQ级产品的性能优势,造成材料的性能浪费,材料利用率低。
因此,镀锌桶料市场急需一种专效用钢,在保证产品质量的前提下,最大限度的利用镀锌桶料的材料性能,提高材料利用率,降低生产成本。
发明内容
本发明目的是提供一种制桶用热镀锌钢带生产工艺,在满足产品性能的前提下,通过优化化学成分质量百分比以及生产工艺,降低生产成本,提高性价比,解决背景技术中存在的问题。
本发明的技术方案是:
一种制桶用热镀锌钢带生产工艺,该产品化学成分质量百分比:C:≤0.07%,Si:≤0.025%,Mn:≤0.25%,P≤0.025%,S≤0.020%,Als:0.015~0.065%,T[O]:≤30ppm,T[N]:≤30ppm,其余为铁和不可避免的夹杂,生产工艺包含如下工艺步骤:
(1)冶炼:转炉冶炼终点质量百分比:C:0.03~0.07%、P≤0.020%、S≤0.015%;连浇温度:1594~1604℃;
(2)热轧:铸坯开轧温度为1080~1130℃,终轧温度885~905℃,卷取温度685~725℃;
(3)冷轧:冷轧总压下率控制在70%~85%;
(4)镀锌:①刷洗段脱脂剂浓度8~10g/L,电解段脱脂剂浓度15~20g/L;②连续退火炉炉内氢气含量9%~11%;③连续退火炉炉内板温:670~700℃,炉鼻子:440~450℃,炉区温差:≤20℃,机组速度为70-90m/min;④光整轧制力:160~240t,光整边控制在5mm以内,光整延伸率:0.8~1.5%。
上述生产工艺步骤(4)镀锌:续退火炉炉内板温包括加热1段:670~690℃,加热2段:680~700℃,均热段:670~690℃。
本发明的创新点是:
1、针对制桶用途,单独设计化学成分,在满足制桶生产的同时,降低炼钢工序生产成本;常规镀锌桶料普遍选用DQ级原料,C含量一般小于0.03%,炼钢生产成本较高,本发明C含量一般控制在0.05-0.07%,生产成本相对较低。
2、为保证热轧原料性能,热轧工序采用高温卷取,卷取温度控制在685~725℃,促使铁素体晶粒长大,晶粒度级别控制在7.5-9级,以便配合镀锌退火工序降低生产成本。
3、冷轧总压下率控制在70%-85%,是为了确保产品的总体性能,为下一步镀锌退火产生织构,改善镀锌工艺及力学性能创造条件。
4、优化镀锌工艺,加热1:670~690℃、加热2:680~700℃、均热:670~690℃、炉鼻子:440~450℃,炉区温差:≤20℃,机组速度为70-90m/min,保证了铁素体晶粒充分还原,确保产品的最终性能满足需求。光整轧制力控制在160~240t范围内,光整边控制在5mm以内,光整延伸率:0.8~1.5%,改善产品板形及表面质量。
5、产品冲压深度可达15mm,屈服强度240MPa~290MPa,伸长率35%~39%,可满足零梯冷弯变形。
6、通过化学成分、热轧工艺、冷轧工艺、镀锌工艺的整体优化配合,满足产品的制桶用途,最大限度的发挥钢材的性能,提高材料利用率,降低生产成本。
本发明的有益效果是:产品化学成分设计合理,降低生产成本,工艺优化,提高了产品性能,能够满足使用要求。
具体实施方式
以下通过实例对本发明作进一步说明。
一种制桶用热镀锌钢带生产工艺,热镀锌钢带化学成分质量百分比:C:≤0.07%,Si:≤0.025%,Mn:≤0.25%,P≤0.025%,S≤0.020%,Als:0.015~0.065%,T[O]:≤30ppm,T[N]:≤30ppm,其余为铁和不可避免的夹杂,该热镀锌钢带的生产工艺包含如下工艺步骤:
(1)冶炼:转炉冶炼终点质量百分比:C:0.03~0.07%、P≤0.020%、S≤0.015%;连浇温度:1594~1604℃;
(2)热轧:铸坯开轧温度为1080~1130℃,终轧温度885~905℃,卷取温度685~725℃;
(3)冷轧:冷轧总压下率控制在70%~85%;
(4)镀锌:①刷洗段脱脂剂浓度8~10g/L,电解段脱脂剂浓度15~20g/L;②连续退火炉炉内氢气含量9%~11%;③连续退火炉炉内板温:670~700℃,炉鼻子:440~450℃,炉区温差:≤20℃,机组速度为70-90m/min;④光整轧制力:160~240t,光整边控制在5mm以内,光整延伸率:0.8~1.5%。
上述生产工艺步骤(4)镀锌:续退火炉炉内板温包括加热1段:670~690℃、加热2段:680~700℃、均热段:670~690℃。
上述工艺步骤中工艺参数控制表1
从上表可以看出,本发明的制桶用热镀锌钢带与现有镀锌桶料相比,(1)生产灵活、成本低、材料利用率高;(2)制桶用镀锌钢带性能优于现有产品。
本产品能够满足制桶需求,产品冷弯合格率达99.23%。
Claims (1)
1.一种制桶用热镀锌钢带生产工艺,其特征在于:该产品化学成分质量百分比:C:≤0.07%,Si:≤0.025%,Mn:≤0.25%,P≤0.025%,S≤0.020%,Als:0.015~0.065%,T[O]:≤30ppm,T[N]:≤30ppm,其余为铁和不可避免的夹杂,生产工艺包含如下工艺步骤:
(1)冶炼:转炉冶炼终点质量百分比:C:0.03~0.07%、P≤0.020%、S≤0.015%;连浇温度:1594~1604℃;
(2)热轧:铸坯开轧温度为1080~1130℃,终轧温度885~905℃,卷取温度685~725℃;
(3)冷轧:冷轧总压下率控制在70%~85%;
(4)镀锌:①刷洗段脱脂剂浓度8~10g/L,电解段脱脂剂浓度15~20g/L;②连续退火炉炉内氢气含量9%~11%;③连续退火炉炉内板温:670~700℃,炉鼻子:440~450℃,炉区温差:≤20℃,机组速度为70-90m/min;④光整轧制力:160~240t,光整边控制在5mm以内,光整延伸率:0.8~1.5%。
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Cited By (2)
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CN106893932A (zh) * | 2017-03-08 | 2017-06-27 | 唐山国丰钢铁有限公司 | 一种家电板用热镀锌钢带的生产工艺 |
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CN106893932A (zh) * | 2017-03-08 | 2017-06-27 | 唐山国丰钢铁有限公司 | 一种家电板用热镀锌钢带的生产工艺 |
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