CN114749510A - 一种民用不锈钢无缝水管制备工艺 - Google Patents
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000010935 stainless steel Substances 0.000 title claims abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 26
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- 239000011265 semifinished product Substances 0.000 claims abstract description 21
- 238000005097 cold rolling Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000047 product Substances 0.000 claims abstract description 11
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- 238000000137 annealing Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
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- 238000001816 cooling Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000005238 degreasing Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 239000006223 plastic coating Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- FGHSTPNOXKDLKU-UHFFFAOYSA-N nitric acid;hydrate Chemical compound O.O[N+]([O-])=O FGHSTPNOXKDLKU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 2
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 2
- 239000004571 lime Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000010731 rolling oil Substances 0.000 claims description 2
- 238000007865 diluting Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 239000002436 steel type Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
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- 238000002791 soaking Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
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- B21C37/15—Making tubes of special shape; Making tube fittings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
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Abstract
本发明公开了一种民用不锈钢无缝水管制备工艺,采用钢种:TP304、TP304L、TP316,规格为φ32×2mm的荒管作为原料;经一次冷拉、一次冷轧得中间半成品,再经二次连轧至所需管外径和壁厚的成品直管,使用打波设备生产出螺旋形波纹管。本发明生产道次少,大大降低了水管的制造成本,使不锈钢无缝管成为可普及推广的民用产品。
Description
技术领域
本发明属于无缝不锈钢管制造技术领域,具体地说是涉及一种民用不锈钢无缝水管制备工艺。
背景技术
随着我国经济的不断发展和人民生活水平的提高,人们对于饮用水的质量越来越重视,不锈钢管有着众所周知的耐腐蚀性,清洁、安全、长寿命的优点,非常适合用于民用供水管道。
现有技术中生产不锈钢入户水管使用的是不锈钢焊管,多采用环波形式。生产过程为:钢带、焊接、收卷、放卷、打波、热处理、收卷、放卷、包塑、喷码、收卷、包装、贴标签,入库。采用钢带焊接后打波,焊缝受力,产生两个质量不可靠点,焊接过程钢带质量、焊接方法等均会影响焊缝质量,焊缝受力后存在焊缝缺陷进一步扩大的可能,波纹管可靠性大幅降低。
传统冷拔工艺、有氧热处理和酸洗工艺生产的无缝不锈钢管因为管粗、壁厚、粗糙、成本高、连接安装工序复杂等原因,一直未能批量用于民用供水领域。
发明内容
本发明目的是针对以上现有技术存在的问题,提供一种民用不锈钢无缝水管制备工艺,解决细径薄壁钢管的加工难题,要求工艺简单,制造成本低。
本发明解决以上技术问题的技术方案是:一种民用不锈钢无缝水管制备工艺,包括以下步骤:
1、采用钢种:TP304、TP304L、TP316,规格为φ32×2mm的荒管作为原料;
2、冷拉:将荒管焊头、表面涂料,冷拔到所需外径的中间管坯;
3、退火:将冷拉的中间管坯装入箱式热处理炉进行固溶处理;
4、冷轧:将中间管坯表面涂油,冷轧至所需外径的中间半成品;
5、去油:采用有机溶剂溶解中间半成品内外表面残余冷轧油,之后清洗内外表面;
6、退火:将中间半成品装入箱式热处理炉进行固溶处理;
7、冷轧:将中间半成品经冷轧、二次连轧至所需管外径和壁厚的成品直管;
8、退火:使用氮气保护,将成品直管装入光亮退火炉固溶处理;
9、打波:使用打波设备生产螺旋形波纹;
10、退火:对成品波纹管进行固溶处理;
11、检测合格后包塑、切割、包装入库。
步骤2中,表面涂料使用12~15%的120目精滤水石灰,8~10%工业脂混合稀释后过滤,均匀地涂在荒管内外表面,中间管坯规格:φ26.9×2mm;
步骤4中,中间半成品规格:φ24.5×2mm;
步骤5中,去油溶液为15~25%硝酸水溶液,浸泡20~40min后吊出,使用高压水枪将内外表面冲洗干净,干燥。
步骤7中,将φ24.5*2mm中间半成品冷轧至φ22*1.5mm,二次连轧至φ20*0.8mm成品直管。
相比现有技术,本发明突出且有益的技术效果是:
1、利用本发明的制造工艺生产的不锈钢无缝水管具有口径小、管壁薄且尺寸精度高等特点,解决了细薄钢管的加工难题,成功生产出φ20*0.8mm的成品管材,填补了国内空白,性能上完全符合国家规定的生活饮用水、净水管使用要求。
2、本发明采用不锈钢无缝管替代传统不锈钢焊管作为民用水管,制备工艺采用大变形量的冷轧工艺减少了冷变形的道次,由传统的6-8道次减少到4个道次,连轧工艺不用上油、去油,大大降低了水管的制造成本,使不锈钢无缝管成为可普及推广的民用产品。
附图说明
图1为本发明的工艺流程图。
具体实施方式
本实施例目标产品为钢牌号TP316,成品规格φ20×0.8mm的民用不锈钢无缝水管直管, 20mm为外径,0.8mm为壁厚。
如图1所示,一种民用不锈钢无缝水管制备工艺,包括以下步骤:
1、采用钢种:TP304、TP304L、TP316,规格为φ32×2mm,长度为2500mm的荒管作为原料。
2、使用12~15%120目精滤水石灰,8~10%工业脂混合稀释后过滤,均匀的涂在荒管内外表面。涂料结束后风干,上L-40冷拔机进行冷拉操作,冷拉成的中间管坯规格:φ26.9 ×2mm。
3、冷拉后装炉,采用箱式炉退火,升温至1050℃,保温15min,出炉后水套冷却。
4、中间管坯表面涂油,使用30轧机进行冷轧变形后的中间半成品规格φ24.5×2mm。
5、冷轧后将中间半成品浸入去油池去油,去油溶液为15~25%硝酸水溶液,浸泡20~ 40min后吊出,使用高压水枪将内外表面冲洗干净,干燥。
6、去油清洗后的中间半成品装入箱式热处理炉进行固溶处理,升温至1050℃,保温时间15~20min,出炉后水套冷却。
7、使用30轧机将φ24.5×2mm中间半成品冷轧至φ22×1.5mm,二次连轧至φ20×0.8mm 成品直管。
8、将成品直管装入光亮退火炉,使用氮气作为保护气氛,1050℃保温时间15~20min,出炉后水套冷却。
9、使用打波设备加工出螺旋形波纹。
10、波形打完后使用热处理生产线进行波纹管热处理,温度1050℃,连续热处理,控制波纹管行进速度,确保固溶时间达15min,出炉后水套冷却。
11、根据企标进行水压试验等成品检测,满足相关要求。
12、根据冷热水使用要求,使用包塑机对波纹管进行包塑,红色为热水管,蓝色为冷水管。包塑后的管子每隔1m进行喷码标识。
13、采用激光切割机将管子分切成3m/支,保证端部与轴向垂直无毛刺,成捆包装后贴标签入库。
上述实施例仅为本发明的较佳实施例,并非依此限制本发明的保护范围,凡采用同等替换或等效变换形成的技术方案,均落在本发明要求保护的范围之内。
Claims (7)
1.一种民用不锈钢无缝水管制备工艺,其特征在于,包括以下步骤:
(1)采用钢种:TP304、TP304L、TP316,规格为φ32×2mm的荒管作为原料;
(2)冷拉:将荒管焊头、表面涂料,冷拔到所需外径的中间管坯;
(3)退火:将冷拉的中间管坯装入箱式热处理炉进行固溶处理;
(4)冷轧:将中间管坯表面涂油,冷轧至所需外径的中间半成品;
(5)去油:利用有机溶剂溶解中间半成品内外表面残余冷轧油,之后使用高压水枪清洗内外表面;
(6)退火:将中间半成品装入箱式热处理炉进行固溶处理;
(7)冷轧:将中间半成品经冷轧、二次连轧至所需管外径和壁厚的成品直管;
(8)退火:使用氮气保护,将成品直管装入光亮退火炉固溶处理;
(9)打波:使用打波设备生产螺旋形波纹;
(10)退火:对成品波纹管进行固溶处理;
(11)检测合格后包塑、切割、包装入库。
2.如权利要求1所述的民用不锈钢无缝水管制备工艺,其特征在于,所述步骤2中的表面涂料使用12~15%的120目精滤水石灰,8~10%工业脂混合稀释后过滤,均匀地涂在荒管内外表面。
3.如权利要求1所述的民用不锈钢无缝水管制备工艺,其特征在于,所述步骤2中,中间管坯规格为φ26.9×2mm。
4.如权利要求1所述的民用不锈钢无缝水管制备工艺,其特征在于,所述步骤4中,中间半成品规格:φ24.5×2mm。
5.如权利要求1所述的民用不锈钢无缝水管制备工艺,其特征在于,所述步骤5中,去油溶液为15~25%硝酸水溶液,浸泡20~40min后吊出,使用高压水枪将内外表面冲洗干净,干燥。
6.如权利要求1所述的民用不锈钢无缝水管制备工艺,其特征在于,所述步骤7中,将φ24.5*2mm中间半成品冷轧至φ22*1.5mm,二次连轧至φ20*0.8mm成品直管。
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