CN111575608A - 一种高强度耐腐蚀钢管及其制备方法 - Google Patents
一种高强度耐腐蚀钢管及其制备方法 Download PDFInfo
- Publication number
- CN111575608A CN111575608A CN202010481227.8A CN202010481227A CN111575608A CN 111575608 A CN111575608 A CN 111575608A CN 202010481227 A CN202010481227 A CN 202010481227A CN 111575608 A CN111575608 A CN 111575608A
- Authority
- CN
- China
- Prior art keywords
- pipe
- blank
- outer pipe
- resistant steel
- inner pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
本发明公开了一种高强度耐腐蚀钢管,包括相互匹配的内管和外管,所述外管套设于所述内管的外侧,所述外管由以下重量份数的原料组成:C:0.15‑0.35;Mn:0.4‑1.6;Si:0.18‑0.4;P<0.03;S<0.004;Al:0.01‑0.04;B:0.001‑0.005;Ti:0.01‑0.05;Ni:0.01‑0.05;Cr:0.1‑0.3;Mo:0.001‑0.003;余量为Fe;所述内管由以下重量份数的原料组成:C:0.10‑0.20;Mn:0.2‑1.0;Si:0.1‑0.2;B:0.001‑0.002;Ni:0.01‑0.02;Cr:0.1‑0.2;Mo:0.001‑0.003;V:0.1‑0.3,N:0.0008‑0.001;余量为Fe;本发明通过设计特定成分的内管和外管,并将外管管坯单独加热后,套于内管管坯外侧,再将套管管坯整体进行水淬,可以大幅度地提高成品套管的力学性能以及耐腐蚀性能,并且,相对于通过在钢管上电镀或热浸镀铝等方式进行的防腐处理来说,管径更易于控制,精度更高。
Description
技术领域
本发明属于管件技术领域,特别涉及一种高强度耐腐蚀钢管及其制备方法。
背景技术
在钢管的生产过程中,大多数的生产厂家会选择通过热浸镀铝或电镀抗氧化层的方 式,来增强钢管的耐腐蚀性,而热浸镀铝过程中,镀层厚度较难控制,因此,会影响钢管管径的精度,电镀耗时较长,花费较高。
发明内容
本发明的目的是提供一种高强度耐腐蚀钢管及其制备方法,以解决上述背景技术中提 出的问题。
为实现上述目的,本发明提供如下技术方案:
一种高强度耐腐蚀钢管,包括相互匹配的内管和外管,所述外管套设于所述内管的外 侧,所述外管由以下重量份数的原料组成:C:0.15-0.35;Mn:0.4-1.6;Si:0.18-0.4;P<0.03; S<0.004;Al:0.01-0.04;B:0.001-0.005;Ti:0.01-0.05;Ni:0.01-0.05;Cr:0.1-0.3; Mo:0.001-0.003;余量为Fe;所述内管由以下重量份数的原料组成:C:0.10-0.20;Mn:0.2-1.0;Si:0.1-0.2;B:0.001-0.002;Ni:0.01-0.02;Cr:0.1-0.2;Mo:0.001-0.003;V:0.1-0.3,N:0.0008-0.001;余量为Fe。
所述外管由以下重量份数的原料组成:C:0.23;Mn:1.0;Si:0.29;P<0.03;S<0.004; Al:0.25;B:0.003;Ti:0.03;Ni:0.03;Cr:0.2;Mo:0.002;余量为Fe;所述内管由 以下重量份数的原料组成:C:0.15;Mn:0.6;Si:0.15;B:0.0015;Ni:0.015;Cr:0.15; Mo:0.002;V:0.2,N:0.0009;余量为Fe。
制备所述的一种高强度耐腐蚀钢管的方法,包括以下步骤,
(1)将外管和内管的坯料分别进行酸洗;锻造斜轧穿孔,热扩变形定径,得外管管坯和内管管坯;
(2)将外管管坯加热至920℃-1100℃,保温5min;
(3)将步骤(2)中的外管管坯,套在内管管坯外侧,得套管管坯;
(4)将套管管坯整体进行水淬,冷却至200℃以下;
(5)室温晾干或在50℃的温度下烘干;
(6)对外管的外侧面进行静电喷涂防腐涂料。
所述的步骤(5)和步骤(6)之间还包括回火工序,所述的回火工序的工艺参数 为:温度为150℃-400℃,保温时间为0.5-3min,然后随炉冷却。
在所述的步骤(5)和步骤(6)之间还包括调直、调圆处理工序。
本发明相对于现有技术的有益技术效果是,
本发明通过设计特定成分的内管和外管,并将外管管坯单独加热后,套于内管管坯外 侧,再将套管管坯整体进行水淬,可以大幅度地提高成品套管的力学性能以及耐腐蚀性能, 并且,相对于通过在钢管上电镀或热浸镀铝等方式进行的防腐处理来说,管径更易于控制, 精度更高。
具体实施方式
下面结合具体实施例对本发明作进一步的说明。
实施例一:
一种高强度耐腐蚀钢管,包括相互匹配的内管和外管,所述外管套设于所述内管的外 侧,所述外管由以下重量份数的原料组成:C:0.23;Mn:1.0;Si:0.29;P<0.03;S<0.004; Al:0.25;B:0.003;Ti:0.03;Ni:0.03;Cr:0.2;Mo:0.002;余量为Fe;
所述内管由以下重量份数的原料组成:C:0.15;Mn:0.6;Si:0.15;B:0.0015;Ni:0.015;Cr:0.15;Mo:0.002;V:0.2,N:0.0009;余量为Fe。。
制备所述的一种高强度耐腐蚀钢管的方法,
包括以下步骤,
(1)将外管和内管的坯料分别进行酸洗;锻造斜轧穿孔,热扩变形定径,得外管管坯和内管管坯;
(2)将外管管坯加热至920℃-1100℃,保温5min;
(3)将步骤(2)中的外管管坯,套在内管管坯外侧,得套管管坯;
(4)将套管管坯整体进行水淬,冷却至200℃以下;
(5)室温晾干或在50℃的温度下烘干;
(6)对外管的外侧面进行静电喷涂防腐涂料;得成品套管。该防腐涂料由以下重量分数的原料组成:醇酸树脂35份,环氧树脂4份,萜烯树脂12份,
烃类溶剂40份,防腐蚀剂6份,催干剂2份;
其中所述的防腐蚀剂为石油磺酸钡,石油磺酸钠,十七烯基咪唑啉烯基丁二酸盐,环 烷酸锌,二壬基萘磺酸钡,苯骈三氮唑,甲基苯骈三氮唑,甲基苯骈三氮唑钠盐,氧 化石油脂钡皂中的一种或几种;所述的烃类溶剂为二甲苯和甲苯的混合物。
所述的步骤(5)和步骤(6)之间还包括回火工序,所述的回火工序的工艺参数 为:温度为150℃-400℃,保温时间为0.5-3min,然后随炉冷却。
在所述的步骤(5)和步骤(6)之间还包括调直、调圆处理工序。
该实施例中,外径为8cm,内径为6cm的成品套管的力学性能以及耐腐蚀性能如下表 所示:
实施例二:
为了简便起见,下文仅对本实施例与实施例一的不同之处进行说明,本实施例中与实 施例一中的不同点仅在于:内管管坯为304不锈钢。
该实施例中,外径为8cm,内径为6cm的成品套管的力学性能以及耐腐蚀性能如下表 所示:
实施例三:
为了简便起见,下文仅对本实施例与实施例一的不同之处进行说明,本实施例中与实 施例一中的不同点仅在于:内管管坯为45号钢。
该实施例中,外径为8cm,内径为6cm的成品套管的力学性能以及耐腐蚀性能如下表 所示:
对比上述三个实施例中的数据可知,本发明通过设计特定成分的内管和外管,并将外 管管坯单独加热后,套于内管管坯外侧,再将套管管坯整体进行水淬,可以使外管和内管 紧密地连接在一起,并且大幅度地提高成品套管的力学性能以及耐腐蚀性能,此外,相对 于通过在钢管上电镀或热浸镀铝等方式进行的防腐处理来说,本发明还具有耗时短,管径 更易于控制,精度更高的优点。
以上所述仅为本发明的较佳实施例,并不用于限制本发明,凡在本发明的精神和原则之内,所作的任何修改,等同替换、改进等,均应包括在本发明的保护范围之内。
Claims (5)
1.一种高强度耐腐蚀钢管,其特征在于,包括相互匹配的内管和外管,所述外管套设于所述内管的外侧,所述外管由以下重量份数的原料组成:C:0.15-0.35;Mn:0.4-1.6;Si:0.18-0.4;P<0.03;S<0.004;Al:0.01-0.04;B:0.001-0.005;Ti:0.01-0.05;Ni:0.01-0.05;Cr:0.1-0.3;Mo:0.001-0.003;余量为Fe;所述内管由以下重量份数的原料组成:C:0.10-0.20;Mn:0.2-1.0;Si:0.1-0.2;B:0.001-0.002;Ni:0.01-0.02;Cr:0.1-0.2;Mo:0.001-0.003;V:0.1-0.3,N:0.0008-0.001;余量为Fe。
2.如权利要求1所述的一种高强度耐腐蚀钢管,其特征在于,所述外管由以下重量份数的原料组成:C:0.23;Mn:1.0;Si:0.29;P<0.03;S<0.004;Al:0.25;B:0.003;Ti:0.03;Ni:0.03;Cr:0.2;Mo:0.002;余量为Fe;所述内管由以下重量份数的原料组成:C:0.15;Mn:0.6;Si:0.15;B:0.0015;Ni:0.015;Cr:0.15;Mo:0.002;V:0.2,N:0.0009;余量为Fe。
3.制备如权利要求1或2所述的一种高强度耐腐蚀钢管的方法,其特征在于,包括以下步骤,
(1)将外管和内管的坯料分别进行酸洗;锻造斜轧穿孔,热扩变形定径,得外管管坯和内管管坯;
(2)将外管管坯加热至920℃-1100℃,保温5min;
(3)将步骤(2)中的外管管坯,套在内管管坯外侧,得套管管坯;
(4)将套管管坯整体进行水淬,冷却至200℃以下;
(5)室温晾干或在50℃的温度下烘干;
(6)对外管的外侧面进行静电喷涂防腐涂料。
4.如权利要求3所述的一种高强度耐腐蚀钢管的制备方法,其特征在于,所述的步骤(5)和步骤(6)之间还包括回火工序,所述的回火工序的工艺参数为:温度为150℃-400℃,保温时间为0.5-3min,然后随炉冷却。
5.如权利要求4所述的一种高强度耐腐蚀钢管的制备方法,其特征在于,在所述的步骤(5)和步骤(6)之间还包括调直、调圆处理工序。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010481227.8A CN111575608A (zh) | 2020-05-31 | 2020-05-31 | 一种高强度耐腐蚀钢管及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010481227.8A CN111575608A (zh) | 2020-05-31 | 2020-05-31 | 一种高强度耐腐蚀钢管及其制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111575608A true CN111575608A (zh) | 2020-08-25 |
Family
ID=72119723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010481227.8A Withdrawn CN111575608A (zh) | 2020-05-31 | 2020-05-31 | 一种高强度耐腐蚀钢管及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111575608A (zh) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0015712A1 (en) * | 1979-02-28 | 1980-09-17 | Kawasaki Jukogyo Kabushiki Kaisha | Method of producing multiple-wall composite pipes |
DE19718897A1 (de) * | 1997-05-03 | 1998-11-05 | Pumpenboese Stahl Gmbh & Co Kg | Doppelwandgestänge für das Herstellen von geologischen Bohrungen |
CN103697244A (zh) * | 2013-12-12 | 2014-04-02 | 四川鑫鼎新材料有限公司 | 一种双金属耐磨无缝复合钢管及其制备方法 |
CN104114730A (zh) * | 2012-02-08 | 2014-10-22 | 新日铁住金株式会社 | 双层管及使用其的焊接结构体 |
CN110117751A (zh) * | 2019-06-18 | 2019-08-13 | 山东远大锅炉配件制造有限公司 | 一种耐磨耐腐蚀双金属复合管材料及其制备方法 |
CN110983185A (zh) * | 2019-12-23 | 2020-04-10 | 天津威尔朗科技有限公司 | 一种高硬度、高耐磨复合钢管 |
-
2020
- 2020-05-31 CN CN202010481227.8A patent/CN111575608A/zh not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0015712A1 (en) * | 1979-02-28 | 1980-09-17 | Kawasaki Jukogyo Kabushiki Kaisha | Method of producing multiple-wall composite pipes |
DE19718897A1 (de) * | 1997-05-03 | 1998-11-05 | Pumpenboese Stahl Gmbh & Co Kg | Doppelwandgestänge für das Herstellen von geologischen Bohrungen |
CN104114730A (zh) * | 2012-02-08 | 2014-10-22 | 新日铁住金株式会社 | 双层管及使用其的焊接结构体 |
CN103697244A (zh) * | 2013-12-12 | 2014-04-02 | 四川鑫鼎新材料有限公司 | 一种双金属耐磨无缝复合钢管及其制备方法 |
CN110117751A (zh) * | 2019-06-18 | 2019-08-13 | 山东远大锅炉配件制造有限公司 | 一种耐磨耐腐蚀双金属复合管材料及其制备方法 |
CN110983185A (zh) * | 2019-12-23 | 2020-04-10 | 天津威尔朗科技有限公司 | 一种高硬度、高耐磨复合钢管 |
Non-Patent Citations (1)
Title |
---|
全国二级造价工程师职业资格考试培训教材编委会编: "《建设工程计量与计价实务安装工程》", 30 April 2019, 江苏凤凰科学技术出版社 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN103205668B (zh) | Qpq盐浴复合处理工艺在板牙架及绞杠架两端手柄杆中的应用 | |
CN107570552B (zh) | 一种钛合金tc4铸坯热轧无缝管的生产方法 | |
CN106216957B (zh) | 汽车扭力梁用焊接钢管的制造方法 | |
CN102796965B (zh) | 一种轧机支承辊钢材及其热处理工艺 | |
CN107227427B (zh) | Φ7.0mm2000MPa级镀锌钢丝及其制造方法 | |
CN201684708U (zh) | 一种涂塑复合钢管生产设备 | |
CN103320745A (zh) | 一种渗铝钢及制备方法 | |
CN109082510A (zh) | 一种适合气门弹簧用近圆扁钢丝的制备工艺 | |
CN111575608A (zh) | 一种高强度耐腐蚀钢管及其制备方法 | |
CN110340148A (zh) | 一种海洋用两相钛合金无缝管坯的斜轧穿孔方法 | |
US20220134488A1 (en) | Flux-cored welding wire and preparation method and use thereof, porous coating and preparation method thereof | |
CN108219825A (zh) | 一种燃料裂解炉碳钢内壁抗结焦涂层的制备方法 | |
CN104313554B (zh) | 面向生物油应用的汽车发动机缸套表面抗腐耐磨复合涂层 | |
WO2008134958A1 (fr) | Procédé de dépôt métallique de cuivre pour élément tubulaire en acier | |
CN110438483A (zh) | 精密钢管钝化防腐工艺 | |
CN109763064A (zh) | 一种高强度低合金钢hx420lad+z热基无锌花镀锌板 | |
CN107164751B (zh) | 一种钢材表面防锈剂组合产品及其应用 | |
CN104762454A (zh) | 一种50Mn钢专用淬火液的制备方法及其应用 | |
CN103101275A (zh) | 一种耐刮伤铝合金板及制备方法 | |
CN208853469U (zh) | 一种草酸冷墩线结构及加工其的拉丝机 | |
CN106216955B (zh) | 特殊钢传动轴管制造工艺 | |
CN112080668A (zh) | 一种智能温控生产钛合金无缝管的方法 | |
CN109536856B (zh) | 一种小直径无缝高压不锈钢油管 | |
CN109967590B (zh) | 一种钛合金u型波纹管差温连续成形方法 | |
CN2258876Y (zh) | 阶梯轴中频感应连续式加热炉 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200825 |
|
WW01 | Invention patent application withdrawn after publication |