CN110238210A - A method for removing titanium oxide skin on the surface of hot-rolled titanium plate - Google Patents
A method for removing titanium oxide skin on the surface of hot-rolled titanium plate Download PDFInfo
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- CN110238210A CN110238210A CN201910576000.9A CN201910576000A CN110238210A CN 110238210 A CN110238210 A CN 110238210A CN 201910576000 A CN201910576000 A CN 201910576000A CN 110238210 A CN110238210 A CN 110238210A
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000010936 titanium Substances 0.000 title claims abstract description 85
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 85
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 32
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005098 hot rolling Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims abstract 11
- 230000003647 oxidation Effects 0.000 claims abstract 2
- 238000007254 oxidation reaction Methods 0.000 claims abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 2
- 238000004381 surface treatment Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011163 secondary particle Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- -1 silver-white transition metal Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
Description
技术领域technical field
本发明涉及一种除去热轧钛板表面氧化钛皮的方法，属于材料加工领域。The invention relates to a method for removing titanium oxide skin on the surface of a hot-rolled titanium plate, belonging to the field of material processing.
背景技术Background technique
钛是一种银白色的过渡金属，具有重量轻、强度高、金属光泽、耐腐蚀性强的特征。化学性质极其稳定，良好的耐高温、耐低温、抗强酸、抗强碱、以及高强度、低密度，被誉为“太空金属”。金属钛优异的性能，通过热轧或冷轧得到不同厚度的薄材，应用于航空航天、石油化工、发电、制药和医疗器械、海水淡化等领域。Titanium is a silver-white transition metal with the characteristics of light weight, high strength, metallic luster and strong corrosion resistance. It has extremely stable chemical properties, good high temperature resistance, low temperature resistance, strong acid resistance, strong alkali resistance, high strength and low density, and is known as "space metal". Due to the excellent properties of titanium metal, thin materials of different thicknesses can be obtained by hot rolling or cold rolling, which are used in aerospace, petrochemical, power generation, pharmaceutical and medical equipment, seawater desalination and other fields.
通过热轧生产钛板，由于钛元素活跃，在大气环境下高温加热后会在表面产生氧化钛皮，钛坯表面的氧化钛皮清除干净与否是衡量除鳞效果好坏的标志，也是衡量热轧钛板质量的标准。实际生产中会通过高压水除去氧化钛皮，但是由于高压水不能始终覆盖整个钛坯表面以及高压水对钛坯表面氧化钛皮的打击力度不够，导致实际除鳞效果不佳，高压水除鳞后在钛坯表面仍然会存在残余氧化钛皮，残余的氧化铁皮在钛坯表面呈现两种分布状况：一是带状分布，这种分布一般比较规则，有一定规律性；二是离散状分布，这种分布一般不规则，没有规律性，反映出来的现象是没有清除干净。氧化钛皮去除不干净，残留在表面会使后续工序的成品率下降，降低钛板轧制质量。综上所述，采用合适的方法完全去除热轧钛板表面氧化钛皮很关键，直接影响钛板轧制质量。Titanium plate is produced by hot rolling. Due to the active titanium element, titanium oxide skin will be formed on the surface after high temperature heating in the atmosphere. Whether the titanium oxide skin on the surface of the titanium billet is cleaned is a sign to measure the effect of descaling The standard of hot-rolled titanium plate quality. In actual production, the titanium oxide skin will be removed by high-pressure water, but because the high-pressure water cannot always cover the entire surface of the titanium billet and the impact of the high-pressure water on the titanium oxide skin on the titanium billet surface is not strong enough, the actual descaling effect is not good. High-pressure water descaling Finally, there will still be residual titanium oxide scale on the surface of the titanium billet, and the residual iron oxide scale presents two distribution conditions on the surface of the titanium billet: one is a banded distribution, which is generally regular and has a certain regularity; the other is a discrete distribution. , this kind of distribution is generally irregular and irregular, and the phenomenon reflected is that it has not been cleaned up. If the titanium oxide skin is not removed cleanly, remaining on the surface will reduce the yield of the subsequent process and reduce the rolling quality of the titanium plate. To sum up, it is very important to completely remove the titanium oxide skin on the surface of the hot-rolled titanium plate with a suitable method, which directly affects the rolling quality of the titanium plate.
发明内容Contents of the invention
本发明目的在于提供一种除去热轧钛板表面氧化钛皮的方法，在轧辊前设置高压气体除鳞装置，除去高压水除鳞后残余的氧化钛皮，提高钛板轧制质量，具体包括以下步骤：The purpose of the present invention is to provide a method for removing the titanium oxide skin on the surface of the hot-rolled titanium plate. A high-pressure gas descaling device is installed before the roll to remove the residual titanium oxide skin after the high-pressure water descaling, so as to improve the rolling quality of the titanium plate. The following steps:
（1）对钛板坯料进行表面处理，将表面处理好的钛板坯料进行加热处理，最终加热温度为开轧温度。(1) Surface treatment is carried out on the titanium plate blank, and the surface-treated titanium plate blank is subjected to heat treatment, and the final heating temperature is the rolling start temperature.
（2）高压水除鳞：在轧机输入辊道上和轧机机架间设置高压除鳞水箱，通过高压水以清除依附在步骤（1）所得钛板表面产生的原始的和二次氧化钛皮。(2) High-pressure water descaling: Set up a high-pressure descaling water tank on the input roller table of the rolling mill and between the rolling mill stands, and use high-pressure water to remove the original and secondary titanium oxide skin attached to the surface of the titanium plate obtained in step (1).
（3）高压气体除鳞：在轧辊前设置高压气体装置，其产生的高压气体冲击步骤（2）得到钛板表面，除去高压水除鳞后残余的氧化钛皮，然后进行后续的轧制过程，每道次轧制前都进行一次高压水除鳞和一次高压气体除鳞。(3) High-pressure gas descaling: Install a high-pressure gas device in front of the roll, and the high-pressure gas generated by it impacts step (2) to obtain the surface of the titanium plate, remove the residual titanium oxide skin after high-pressure water descaling, and then carry out the subsequent rolling process , one high-pressure water descaling and one high-pressure gas descaling are carried out before each rolling pass.
优选的，本发明所述高压水除鳞过程中水压为18~30 Mpa。Preferably, the water pressure in the high-pressure water descaling process of the present invention is 18-30 Mpa.
优选的，本发明通过采用“高压气体”对在大气环境下加热后经高压除鳞后的钛坯进行二次除鳞，除去依附在钛坯表面残余的氧化钛皮，高压气体装置设置在高压水除鳞后，轧辊前，高压气体装置喷嘴距轧制钛板表面的高度H为200~500 mm；单个喷嘴喷射在钛板表面上的气体的覆盖长度I大于等于喷嘴间距L，即IL；高压气体压力P为15~20MPa；冲击力F大于等于氧化钛皮与钛板表面的粘附力f，即Ff；喷嘴体积流量Q为120~165 cm3/s；喷嘴当量直径d为10~20 mm；喷射角。Preferably, the present invention uses "high-pressure gas" to perform secondary descaling on the titanium billet that has been heated in the atmosphere and undergoes high-pressure descaling to remove the remaining titanium oxide skin attached to the surface of the titanium billet. The high-pressure gas device is set at a high-pressure After water descaling and before the roll, the height H of the nozzle of the high-pressure gas device from the surface of the rolled titanium plate is 200-500 mm; the coverage length I of the gas sprayed by a single nozzle on the surface of the titanium plate is greater than or equal to the nozzle distance L, that is, I L; the high pressure gas pressure P is 15~20MPa; the impact force F is greater than or equal to the adhesion force f between the titanium oxide skin and the surface of the titanium plate, that is, F f; nozzle volume flow Q is 120~165 cm 3 /s; nozzle equivalent diameter d is 10~20 mm; spray angle .
本发明所述热处理过程，以及后续的轧制过程均为本领域技术的常规方法。The heat treatment process of the present invention, and the subsequent rolling process are conventional methods in the art.
本发明的有益效果：Beneficial effects of the present invention:
本发明所述方法操作简单方便，成本低，改进了高压水除鳞效果不佳的现象，通过在轧辊前设置高压气体装置，选择合适的气体，通过高压冲击钛板表面，有效除去高压水除鳞后依附在钛坯表面呈带状和离散分布的残余氧化钛皮，改善预轧钛板的表面质量，最终获得高质量的热轧钛板材，提高钛板轧制的成品率。The method of the present invention is simple and convenient to operate, low in cost, and improves the phenomenon that the high-pressure water descaling effect is not good. By installing a high-pressure gas device in front of the roll, selecting a suitable gas, and impacting the surface of the titanium plate through high pressure, the high-pressure water descaling effect can be effectively removed. After scaling, the remaining titanium oxide scales attached to the surface of the titanium billet in the form of bands and discretely distributed can improve the surface quality of the pre-rolled titanium plate, finally obtain high-quality hot-rolled titanium plates, and improve the yield of titanium plate rolling.
附图说明Description of drawings
图1为本发明所述高压气体除鳞的原理图。Fig. 1 is a principle diagram of high-pressure gas descaling according to the present invention.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明作进一步详细说明，但本发明的保护范围并不限于所述内容。The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the content described.
实施例1Example 1
本实施例以钛板为处理对象：具体选用TA1，其厚度为80 mm，长度为5000mm，宽度为500mm。In this embodiment, the titanium plate is used as the processing object: specifically, TA1 is selected, and its thickness is 80 mm, its length is 5000 mm, and its width is 500 mm.
本实施例所述除去热轧钛板表面氧化钛皮的方法，如图1所示，具体包括以下步骤：The method for removing the titanium oxide skin on the surface of the hot-rolled titanium plate described in this embodiment, as shown in Figure 1, specifically comprises the following steps:
（1）轧制钛坯的准备：对钛板坯料进行表面处理，清除氧化层、污渍，并对坯料各个面的毛刺进行打磨，保证光滑平整。(1) Preparation of rolled titanium billet: surface treatment of titanium plate billet, removal of oxide layer and stains, and grinding of burrs on each surface of the billet to ensure smoothness.
（2）加热处理：大气环境下，将表面处理好的钛板坯放在步进式加热炉内，以5 ℃/s的速度加热到开轧温度820℃。(2) Heat treatment: In the atmospheric environment, place the titanium slab with the surface treatment in a walking heating furnace, and heat it to the rolling start temperature of 820°C at a speed of 5°C/s.
（3）高压水除鳞：在轧机输入辊道上和轧机机架间装备高压除鳞水箱，通过水压为18 MPa的高压水击打表面，以清除依附在钛板表面产生的原始的和二次氧化钛皮。(3) High-pressure water descaling: Equip a high-pressure descaling water tank on the input roller table of the rolling mill and between the rolling mill stands, and hit the surface with high-pressure water with a water pressure of 18 MPa to remove the original and secondary particles attached to the surface of the titanium plate. Titanium oxide skin.
（4）高压气体除鳞：通过轧辊前设置的高压气体装置（设置在高压除鳞水箱后，轧辊前），除去高压水除鳞后残余的氧化钛皮；高压气体装置喷嘴距轧制钛板表面的高度H为300 mm；单个喷嘴喷射在钛板表面上的气体的覆盖长度500 mm，喷嘴间距为350 mm；高压气体压力为15MPa，喷射角为89，喷嘴体积流量Q为120cm3/s；喷嘴当量直径d为10 mm。(4) High-pressure gas descaling: through the high-pressure gas device installed in front of the roll (set behind the high-pressure descaling water tank and in front of the roll), remove the remaining titanium oxide skin after high-pressure water descaling; the distance between the nozzle of the high-pressure gas device and the rolled titanium plate The height H of the surface is 300 mm; the coverage length of the gas sprayed on the surface of the titanium plate by a single nozzle is 500 mm, and the distance between the nozzles is 350 mm; the pressure of the high-pressure gas is 15 MPa, and the spray angle is 89 , the nozzle volume flow Q is 120cm 3 /s; the nozzle equivalent diameter d is 10 mm.
（5）除鳞后的钛板进行4道次轧制，通过粗轧和精轧获得最终所需厚度的钛板，每道次轧制前都进行一次高压水除鳞和一次高压气体除鳞。(5) The descaled titanium plate is rolled for 4 passes, and the titanium plate with the final required thickness is obtained through rough rolling and finish rolling. Before each rolling pass, a high-pressure water descaling and a high-pressure gas descaling are carried out .
（6）轧制完成后对钛坯进行冷却处理，冷却处理后将轧制好的钛坯进行切边、拉矫平整处理得到所需产品。(6) After the rolling is completed, the titanium billet is cooled. After the cooling treatment, the rolled titanium billet is trimmed, stretched and leveled to obtain the desired product.
实施例2Example 2
本实施例以钛板为处理对象：具体选用TA1，其厚度为80 mm，长度为5000mm，宽度为500mm。In this embodiment, the titanium plate is used as the processing object: specifically, TA1 is selected, and its thickness is 80 mm, its length is 5000 mm, and its width is 500 mm.
本实施例所述除去热轧钛板表面氧化钛皮的方法，如图1所示，具体包括以下步骤：The method for removing the titanium oxide skin on the surface of the hot-rolled titanium plate described in this embodiment, as shown in Figure 1, specifically comprises the following steps:
（1）轧制钛坯的准备：对钛板坯料进行表面处理，清除氧化层、污渍，并对坯料各个面的毛刺进行打磨，保证光滑平整。(1) Preparation of rolled titanium billet: surface treatment of titanium plate billet, removal of oxide layer and stains, and grinding of burrs on each surface of the billet to ensure smoothness.
（2）加热处理：大气环境下，将表面处理好的钛板坯放在步进式加热炉内，以5 ℃/s的速度加热到开轧温度820℃。(2) Heat treatment: In the atmospheric environment, place the titanium slab with the surface treatment in a walking heating furnace, and heat it to the rolling start temperature of 820°C at a speed of 5°C/s.
（3）高压水除鳞：在轧机输入辊道上和轧机机架间装备高压除鳞水箱，通过水压为25MPa的高压水击打表面，以清除依附在钛板表面产生的原始的和二次氧化钛皮。(3) High-pressure water descaling: Equip a high-pressure descaling water tank on the input roller table of the rolling mill and between the rolling mill stands, and hit the surface with high-pressure water with a water pressure of 25MPa to remove the original and secondary scale attached to the surface of the titanium plate. Titanium oxide skin.
（4）高压气体除鳞：通过轧辊前设置的高压气体装置（设置在高压除鳞水箱后，轧辊前），除去高压水除鳞后残余的氧化钛皮；高压气体装置喷嘴距轧制钛板表面的高度H为400 mm；单个喷嘴喷射在钛板表面上的气体的覆盖长度500 mm，喷嘴间距为350 mm；高压气体压力为18MPa，喷射角为89，喷嘴体积流量Q为140 cm3/s；喷嘴当量直径d为15 mm。(4) High-pressure gas descaling: through the high-pressure gas device installed in front of the roll (set behind the high-pressure descaling water tank and in front of the roll), remove the remaining titanium oxide skin after high-pressure water descaling; the distance between the nozzle of the high-pressure gas device and the rolled titanium plate The height H of the surface is 400 mm; the coverage length of the gas sprayed on the surface of the titanium plate by a single nozzle is 500 mm, and the distance between the nozzles is 350 mm; the pressure of the high-pressure gas is 18 MPa, and the spray angle is 89 , the nozzle volume flow Q is 140 cm 3 /s; the nozzle equivalent diameter d is 15 mm.
（5）除鳞后的钛板进行4道次轧制，通过粗轧和精轧获得最终所需厚度的钛板，每道次轧制前都进行一次高压水除鳞和一次高压气体除鳞。(5) The descaled titanium plate is rolled for 4 passes, and the titanium plate with the final required thickness is obtained through rough rolling and finish rolling. Before each rolling pass, a high-pressure water descaling and a high-pressure gas descaling are carried out .
（6）轧制完成后对钛坯进行冷却处理，冷却处理后将轧制好的钛坯进行切边、拉矫平整处理得到所需产品。(6) After the rolling is completed, the titanium billet is cooled. After the cooling treatment, the rolled titanium billet is trimmed, stretched and leveled to obtain the desired product.
实施例3Example 3
本实施例以钛板为处理对象：具体选用TA1，其厚度为80 mm，长度为5000mm，宽度为500mm。In this embodiment, the titanium plate is used as the processing object: specifically, TA1 is selected, and its thickness is 80 mm, its length is 5000 mm, and its width is 500 mm.
本实施例所述除去热轧钛板表面氧化钛皮的方法，如图1所示，具体包括以下步骤：The method for removing the titanium oxide skin on the surface of the hot-rolled titanium plate described in this embodiment, as shown in Figure 1, specifically comprises the following steps:
（1）轧制钛坯的准备：对钛板坯料进行表面处理，清除氧化层、污渍，并对坯料各个面的毛刺进行打磨，保证光滑平整。(1) Preparation of rolled titanium billet: surface treatment of titanium plate billet, removal of oxide layer and stains, and grinding of burrs on each surface of the billet to ensure smoothness.
（2）加热处理：大气环境下，将表面处理好的钛板坯放在步进式加热炉内，以5 ℃/s的速度加热到开轧温度820℃。(2) Heat treatment: In the atmospheric environment, place the titanium slab with the surface treatment in a walking heating furnace, and heat it to the rolling start temperature of 820°C at a speed of 5°C/s.
（3）高压水除鳞：在轧机输入辊道上和轧机机架间装备高压除鳞水箱，通过水压为30 MPa的高压水击打表面，以清除依附在钛板表面产生的原始的和二次氧化钛皮。(3) High-pressure water descaling: Equip a high-pressure descaling water tank on the input roller table of the rolling mill and between the rolling mill stands, and hit the surface with high-pressure water with a water pressure of 30 MPa to remove the original and secondary particles attached to the surface of the titanium plate. Titanium oxide skin.
（4）高压气体除鳞：通过轧辊前设置的高压气体装置（设置在高压除鳞水箱后，轧辊前），除去高压水除鳞后残余的氧化钛皮；高压气体装置喷嘴距轧制钛板表面的高度H为500 mm；单个喷嘴喷射在钛板表面上的气体的覆盖长度500 mm，喷嘴间距为350 mm；高压气体压力为20MPa，喷射角为89，喷嘴体积流量Q为160 cm3/s；喷嘴当量直径d为20 mm。(4) High-pressure gas descaling: through the high-pressure gas device installed in front of the roll (set behind the high-pressure descaling water tank and in front of the roll), remove the remaining titanium oxide skin after high-pressure water descaling; the distance between the nozzle of the high-pressure gas device and the rolled titanium plate The height H of the surface is 500 mm; the coverage length of the gas sprayed on the surface of the titanium plate by a single nozzle is 500 mm, and the distance between the nozzles is 350 mm; the pressure of the high-pressure gas is 20 MPa, and the spray angle is 89 , the nozzle volume flow Q is 160 cm 3 /s; the nozzle equivalent diameter d is 20 mm.
（5）除鳞后的钛板进行4道次轧制，通过粗轧和精轧获得最终所需厚度的钛板，每道次轧制前都进行一次高压水除鳞和一次高压气体除鳞。(5) The descaled titanium plate is rolled for 4 passes, and the titanium plate with the final required thickness is obtained through rough rolling and finish rolling. Before each rolling pass, a high-pressure water descaling and a high-pressure gas descaling are carried out .
（6）轧制完成后对钛坯进行冷却处理，冷却处理后将轧制好的钛坯进行切边、拉矫平整处理得到所需产品。(6) After the rolling is completed, the titanium billet is cooled. After the cooling treatment, the rolled titanium billet is trimmed, stretched and leveled to obtain the desired product.
本发明实施例1~3制备得到的产品表面质量优越，改善轧制钛坯表面质量，减少轧制缺陷。传统除鳞都是采用高压水除鳞法，效果不佳，表面易粘附带状氧化皮或离散分布的残余氧化皮，在后续轧制过程中容易造成轧制缺陷，降低产品质量。在高压水除鳞后增加高压气体除鳞过程，有效除去残余氧化皮，提高产品轧制质量。The products prepared in Examples 1 to 3 of the present invention have superior surface quality, improve the surface quality of rolled titanium billets, and reduce rolling defects. The traditional descaling method uses high-pressure water descaling method, which is not effective, and the surface is easy to adhere to banded scale or discretely distributed residual scale, which is likely to cause rolling defects in the subsequent rolling process and reduce product quality. After the high-pressure water descaling, the high-pressure gas descaling process is added to effectively remove the residual scale and improve the rolling quality of the product.
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Application publication date: 20190917 |