CN115041675A - Composite water gap and preparation process thereof - Google Patents
Composite water gap and preparation process thereof Download PDFInfo
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- CN115041675A CN115041675A CN202210960664.7A CN202210960664A CN115041675A CN 115041675 A CN115041675 A CN 115041675A CN 202210960664 A CN202210960664 A CN 202210960664A CN 115041675 A CN115041675 A CN 115041675A
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- 239000002131 composite material Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims 3
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 230000003746 surface roughness Effects 0.000 claims description 5
- 238000004512 die casting Methods 0.000 claims description 3
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 claims description 2
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 claims description 2
- -1 aluminum zirconium carbon Chemical compound 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 2
- 238000005266 casting Methods 0.000 abstract description 6
- 238000005058 metal casting Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000003749 cleanliness Effects 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 238000004901 spalling Methods 0.000 abstract 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229910018516 Al—O Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
本发明属于金属铸造技术领域，具体为一种复合水口及其制备工艺，通过在水口本体内镶嵌一块壁面光滑的熔点高于钢液浇铸温度的金属，其表面光滑度在浇铸过程中不会发生变化，光滑的壁面状态不利于钢中夹杂物在其壁面沉积，因此不会形成水口结瘤物，从根本上杜绝了水口结瘤物的形成。其设计原理简单，浇铸结束后的金属可以重复使用，一方面减少了水口结瘤对连铸生产的影响，另一方面消除了铸坯内剥落大颗粒结瘤物，提高铸坯洁净度水平和质量。
The invention belongs to the technical field of metal casting, in particular to a composite nozzle and a preparation process thereof. By inserting a metal with a smooth wall surface and a melting point higher than the molten steel casting temperature in the nozzle body, the surface smoothness will not occur during the casting process. Changes, the smooth wall state is not conducive to the deposition of inclusions in the steel on the wall surface, so it will not form nozzle nodules, and fundamentally prevent the formation of nozzle nodules. Its design principle is simple, and the metal after casting can be reused. On the one hand, it reduces the influence of nozzle nodules on continuous casting production, on the other hand, it eliminates the spalling of large particle nodules in the billet, and improves the cleanliness level of the billet. quality.
Description
技术领域technical field
本发明涉及金属铸造技术领域，具体为一种复合水口及其制备工艺。The invention relates to the technical field of metal casting, in particular to a composite nozzle and a preparation process thereof.
背景技术Background technique
金属铸造领域中的水口承担着钢液由钢包进入中间包以及由中间包或钢包进入到结晶器或模具中的作用，常见的水口包括浸入式水口和大包长水口。钢液中Al-O等类型夹杂物会在水口内壁沉积导致水口堵塞，影响连铸生产顺行。剥落的结瘤物形成大颗粒夹杂，该大颗粒夹杂物会进入到铸坯内，影响铸坯内部洁净度和铸坯质量。该大颗粒夹杂物会在铸坯轧制过程形成产品缺陷，严重影响钢材质量。The nozzle in the field of metal casting undertakes the role of molten steel entering the tundish from the ladle and entering the mold or mold from the tundish or ladle. Common nozzles include submerged nozzles and large ladle long nozzles. Inclusions such as Al-O in the molten steel will deposit on the inner wall of the nozzle and cause the nozzle to block, affecting the continuous casting production. The exfoliated nodules form large-grain inclusions, which will enter the slab and affect the internal cleanliness of the slab and the quality of the slab. The large-grained inclusions will form product defects during the billet rolling process, which will seriously affect the quality of the steel.
现阶段水口防堵采用设计新型水口形状、水口内壁涂有涂层、钢液钙处理、或减少钢中Al-O等类型夹杂物来减轻水口堵塞，但以上现有技术存在以下问题：At this stage, the nozzle blocking prevention adopts the design of a new nozzle shape, the inner wall of the nozzle is coated with a coating, the molten steel is calcium treated, or the inclusion of Al-O in the steel is reduced to reduce the nozzle blockage. However, the above existing technologies have the following problems:
通过设计新型水口形状以改善钢液在水口内流场来减轻水口堵塞收效甚微，仍不能有效减轻水口结瘤问题；By designing a new shape of the nozzle to improve the flow field of the molten steel in the nozzle, the effect of reducing the blockage of the nozzle is very small, and the problem of nozzle nodules cannot be effectively alleviated;
水口内壁涂有涂层，在使用过程中，随着钢液浇铸的进行，水口内壁涂层在钢液冲刷和反应下变薄，水口内壁侵蚀变快，水口使用寿命较低；The inner wall of the nozzle is coated with a coating. During the use process, with the progress of molten steel casting, the coating on the inner wall of the nozzle becomes thinner under the scouring and reaction of the molten steel, the corrosion of the inner wall of the nozzle becomes faster, and the service life of the nozzle is low;
钙处理时钙加入量需要严格把控，工业生产过程存在一定难度。有相当一部分钢种不允许使用钙处理，例如轴承钢和汽车板等，其水口结瘤问题仍然存在。The amount of calcium added during calcium treatment needs to be strictly controlled, and there are certain difficulties in the industrial production process. There are quite a few steel grades that are not allowed to use calcium treatment, such as bearing steel and automobile plates, and the problem of nozzle nodules still exists.
通过工艺改进措施，减少钢液中夹杂物的数量，但钢液内的夹杂物不可能完全去除，只能在一定程度上减少钢中夹杂物，但夹杂物导致的水口结瘤问题仍然存在。Through process improvement measures, the number of inclusions in the molten steel can be reduced, but the inclusions in the molten steel cannot be completely removed, and the inclusions in the steel can only be reduced to a certain extent, but the problem of nozzle nodules caused by inclusions still exists.
发明内容SUMMARY OF THE INVENTION
本发明的主要目的是提出一种复合水口及其制备工艺，根据流体力学原理和夹杂物运动分析，可以减轻水口堵塞结瘤。The main purpose of the present invention is to propose a composite nozzle and its preparation process, which can reduce nozzle blockage and nodule according to the principle of fluid mechanics and the analysis of movement of inclusions.
为解决上述技术问题，根据本发明的一个方面，本发明提供了如下技术方案：In order to solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:
一种复合水口，包括水口本体和金属内衬，且金属的熔点高于复合水口流经的钢液的温度。A composite nozzle includes a nozzle body and a metal lining, and the melting point of the metal is higher than the temperature of molten steel through which the composite nozzle flows.
作为本发明所述的一种复合水口的优选方案，其中：所述复合水口包括大包长水口、浸入式水口。As a preferred solution of the composite nozzle of the present invention, wherein: the composite nozzle includes a large-package long nozzle and a submerged nozzle.
作为本发明所述的一种复合水口的优选方案，其中：所述金属内衬位于水口本体内壁渣线以下区域。As a preferred solution of the composite nozzle of the present invention, wherein: the metal lining is located in the area below the slag line of the inner wall of the nozzle body.
作为本发明所述的一种复合水口的优选方案，其中：所述金属为纯金属或金属合金。As a preferred solution of the composite nozzle of the present invention, wherein: the metal is pure metal or metal alloy.
作为本发明所述的一种复合水口的优选方案，其中：所述水口本体材质采用本领域常用耐火材质，包括但不限于铝碳质、铝锆碳质、镁碳质等。As a preferred solution of the composite nozzle of the present invention, the nozzle body is made of refractory materials commonly used in the field, including but not limited to aluminum carbon, aluminum zirconium carbon, magnesium carbon, and the like.
作为本发明所述的一种复合水口的优选方案，其中：所述金属内衬的表面粗糙度Ra≤12.5μm，所述表面是指与钢液接触的一面，对与水口本体接触的一面不做要求。As a preferred solution of the composite nozzle according to the present invention, wherein: the surface roughness Ra of the metal lining is less than or equal to 12.5 μm, the surface refers to the side in contact with the molten steel, and the surface in contact with the nozzle body is not do request.
作为本发明所述的一种复合水口的优选方案，其中：所述金属内衬和水口本体采用机械结合的方式固定；优选的，所述金属内衬镶嵌于水口本体内壁。As a preferred solution of the composite nozzle of the present invention, wherein: the metal lining and the nozzle body are fixed by mechanical combination; preferably, the metal lining is embedded in the inner wall of the nozzle body.
为解决上述技术问题，根据本发明的另一个方面，本发明提供了如下技术方案：In order to solve the above-mentioned technical problems, according to another aspect of the present invention, the present invention provides the following technical solutions:
一种上述复合水口的制备工艺，对水口本体内壁进行加工，将金属内衬镶嵌于水口本体内壁上。In a preparation process of the above-mentioned composite nozzle, the inner wall of the nozzle body is processed, and the metal inner lining is inlaid on the inner wall of the nozzle body.
作为本发明所述的一种复合水口的优选方案，其中：对水口本体内壁进行加工的区域为水口本体内壁渣线以下区域。As a preferred solution of the composite nozzle of the present invention, wherein: the area where the inner wall of the nozzle body is processed is the area below the slag line of the inner wall of the nozzle body.
本发明还提供了一种上述复合水口在钢液连铸或模铸工艺中的应用。The present invention also provides an application of the above-mentioned composite nozzle in molten steel continuous casting or die casting process.
本发明还提供了一种上述制备工艺制备的复合水口在钢液连铸或模铸工艺中的应用。The invention also provides an application of the composite nozzle prepared by the above preparation process in the continuous casting or die casting process of molten steel.
本发明的有益效果如下：The beneficial effects of the present invention are as follows:
本发明提供一种复合水口及其制备工艺，通过在水口本体内镶嵌一块壁面光滑的且熔点高于复合水口流经的钢液的金属，其表面光滑度在浇铸过程中不会发生变化，光滑的壁面状态不利于钢中夹杂物在其壁面沉积，因此不会形成水口结瘤物，从根本上杜绝了水口结瘤物的形成。其设计原理简单，浇铸结束后的金属可以重复使用，一方面减少了水口结瘤对连铸生产的影响，另一方面消除了铸坯内剥落大颗粒结瘤物，提高铸坯洁净度水平和质量。The invention provides a composite nozzle and a preparation process thereof. By embedding a metal with a smooth wall surface and a melting point higher than the molten steel flowing through the composite nozzle in the nozzle body, the surface smoothness will not change during the casting process, and the smoothness of the surface will not change. The state of the wall surface is not conducive to the deposition of inclusions in the steel on the wall surface, so no nodule at the nozzle will be formed, and the formation of nodule at the nozzle is fundamentally prevented. Its design principle is simple, and the metal after casting can be reused. On the one hand, it reduces the influence of nozzle nodules on continuous casting production. quality.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.
图1为本发明实施例1复合水口示意图；1 is a schematic diagram of a composite nozzle in
图2为本发明实施例2复合水口示意图。FIG. 2 is a schematic diagram of a composite nozzle in Example 2 of the present invention.
附图标号说明：Description of reference numbers:
1-水口本体，2-金属内衬，3-渣线。1- Nozzle body, 2- Metal lining, 3- Slag line.
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.
具体实施方式Detailed ways
下面将结合实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
本发明提供一种复合水口及其制备工艺，与传统水口相比，与钢液接触的渣线以下水口内壁部分由金属代替，金属表面粗糙程度远小于水口本体材质，且随着浇铸过程，其壁面粗糙度不会发生明显改变，根据流体力学原理，光滑壁面水口结瘤倾向性较小，可提高其使用寿命；水口结构简单，易于批量化生产，金属内衬可在使用后进行回收重复利用，节约生产成本。The invention provides a composite nozzle and a preparation process thereof. Compared with the traditional nozzle, the inner wall part of the nozzle below the slag line in contact with the molten steel is replaced by metal, and the roughness of the metal surface is much smaller than the material of the nozzle body. The wall surface roughness will not change significantly. According to the principle of fluid mechanics, the nozzle on the smooth wall has a small tendency to nodulate, which can improve its service life; the nozzle structure is simple and easy to mass produce, and the metal lining can be recycled and reused after use. , saving production costs.
以下结合具体实施例对本发明技术方案进行进一步说明。The technical solution of the present invention will be further described below with reference to specific embodiments.
实施例1Example 1
如图1所示，本实施例提供一种复合水口，所述复合水口为大包长水口，包括水口本体1和金属内衬2；该水口本体1内壁渣线3附近以下区域镶嵌有金属内衬2。本实施例中，金属为钛金属，其表面粗糙程度Ra≤12.5μm。本实施例中，金属内衬的形状及其安装位置如图1所示。本实施例中水口本体内光滑的金属内衬，可以避免钢液由钢包进入中间包以及由钢包进入到结晶器或模具过程中夹杂物的影响，减少钢中夹杂物在钢包长水口内壁的粘结。As shown in FIG. 1 , this embodiment provides a composite nozzle. The composite nozzle is a large-package long nozzle, including a
实施例2Example 2
如图2所示，本实施例提供一种复合水口，所述复合水口为浸入式水口，包括水口本体1和金属内衬2；该水口本体1内壁渣线3附近以下区域镶嵌有金属内衬2。金属为钛合金，其表面粗糙程度Ra≤12.5μm，本实施例中，金属内衬的形状及其安装位置如图2所示。本实施例中水口本体内光滑的金属内衬，可以避免钢液由中间包进入到结晶器或模具过程中夹杂物带来的影响，减少钢中夹杂物在浸入式水口内壁的粘结，从而减轻浸入式水口结瘤。As shown in FIG. 2 , this embodiment provides a composite nozzle, which is an immersed nozzle, including a
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by the content of the present invention is used, or the direct/indirect application in other related All technical fields are included in the scope of patent protection of the present invention.
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2022
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