CN111678478B - A kind of detection method of oxide film thickness of high-strength steel galvanizing production line - Google Patents
A kind of detection method of oxide film thickness of high-strength steel galvanizing production line Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 60
- 239000010959 steel Substances 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000005246 galvanizing Methods 0.000 title claims abstract description 13
- 238000001514 detection method Methods 0.000 title claims 3
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 82
- 230000003647 oxidation Effects 0.000 claims abstract description 81
- 230000005855 radiation Effects 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- 239000001301 oxygen Substances 0.000 claims description 24
- 238000005259 measurement Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005275 alloying Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
- G01B21/085—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness using thermal means
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Abstract
Description
技术领域technical field
本发明属于于轧钢技术领域，具体涉及一种高强钢镀锌产线氧化膜厚度检测方法。The invention belongs to the technical field of steel rolling, and particularly relates to a method for detecting the thickness of an oxide film of a high-strength steel galvanizing production line.
背景技术Background technique
近年来，各大先进钢铁企业逐步建成专门应用于高强钢生产的热镀锌机组。高强钢由于Si、Mn、Cr等合金元素含量较多，易于发生选择性氧化现象，造成带钢表面浸润性下降，产生漏镀问题。为应对该问题，在高强钢产线加热段往往配备有预氧化仓，在生产过程中，在预氧化仓内部通入空气或水蒸气，在预氧化仓内部实现氧化气氛，从而实现带钢表面合金元素的内氧化。带钢经过预氧化后，带钢表面氧化膜的厚度对于在炉区后段是否能够有效还原成为海绵铁有重要影响，而目前，尚未有有效手段对预氧化层出口位置的带钢表面氧化膜厚度进行测量。In recent years, major advanced iron and steel enterprises have gradually built hot-dip galvanizing units specially used in the production of high-strength steel. Due to the high content of alloying elements such as Si, Mn, and Cr, high-strength steel is prone to selective oxidation, resulting in a decrease in the wettability of the strip surface and the problem of leakage plating. In order to deal with this problem, the heating section of the high-strength steel production line is often equipped with a pre-oxidation chamber. During the production process, air or water vapor is introduced into the pre-oxidation chamber to realize an oxidizing atmosphere inside the pre-oxidation chamber, so as to realize the surface of the strip steel. Internal oxidation of alloying elements. After the strip is pre-oxidized, the thickness of the oxide film on the surface of the strip has an important influence on whether it can be effectively reduced to sponge iron in the latter part of the furnace area. At present, there is no effective means to remove the oxide film on the surface of the strip at the exit of the pre-oxidation layer. thickness is measured.
发明内容SUMMARY OF THE INVENTION
本发明提供一种高强钢镀锌产线氧化膜厚度检测方法，解决了现有技术中尚未有有效手段对预氧化仓出口位置的带钢表面氧化膜厚度进行测量的问题。The invention provides a method for detecting the oxide film thickness of a high-strength steel galvanizing production line, which solves the problem that there is no effective means in the prior art to measure the thickness of the oxide film on the surface of the strip steel at the outlet of the pre-oxidation bin.
为解决上述技术问题，本发明提供了一种高强钢镀锌产线氧化膜厚度检测方法，所述方法包括步骤：In order to solve the above-mentioned technical problems, the present invention provides a method for detecting the thickness of an oxide film of a high-strength steel galvanizing production line, the method comprising the steps of:
在高强钢预氧化仓入口配备楔形高温计，在高强钢预氧化仓出口配备单波长辐射高温计；Equipped with a wedge-shaped pyrometer at the entrance of the high-strength steel pre-oxidation chamber, and equipped with a single-wavelength radiation pyrometer at the outlet of the high-strength steel pre-oxidation chamber;
分别使用所述楔形高温计和所述单波长辐射高温计测量高强钢预氧化仓入口和高强钢预氧化仓出口的温度；Using the wedge pyrometer and the single-wavelength radiation pyrometer to measure the temperature at the inlet of the high-strength steel pre-oxidation bin and the outlet of the high-strength steel pre-oxidation bin;
保持带钢运动速度及预氧化仓入口温度固定；Keep the speed of the strip steel and the inlet temperature of the pre-oxidation chamber fixed;
保证氧化温度及氧化时间固定，逐步提高预氧化仓的露点或氧含量；Ensure that the oxidation temperature and oxidation time are fixed, and gradually increase the dew point or oxygen content of the pre-oxidation chamber;
记录所述楔形高温计和所述单波长辐射高温计的测温值；Record the temperature measurement values of the wedge pyrometer and the single-wavelength radiation pyrometer;
根据所述单波长高温计测温值的极值点，确定带钢预氧化仓出口位置的氧化膜厚度。According to the extreme point of the temperature measured by the single-wavelength pyrometer, determine the thickness of the oxide film at the outlet of the strip steel pre-oxidation chamber.
优选地，所述带钢预氧化仓出口位置的氧化膜厚度的计算公式为：Preferably, the formula for calculating the thickness of the oxide film at the outlet of the strip pre-oxidation bin is:
其中，d为所述带钢预氧化仓出口位置的氧化膜厚度，λ为所述单波长高温计的辐射波长。Wherein, d is the thickness of the oxide film at the outlet of the strip pre-oxidation chamber, and λ is the radiation wavelength of the single-wavelength pyrometer.
优选地，所述在高强钢预氧化仓出口配备单波长辐射高温计包括：在高强钢预氧化仓出口配备第一单波长辐射高温计和第二单波长辐射高温计。Preferably, the step of disposing a single-wavelength radiation pyrometer at the outlet of the high-strength steel pre-oxidation chamber includes: configuring a first single-wavelength radiation pyrometer and a second single-wavelength radiation pyrometer at the outlet of the high-strength steel pre-oxidation chamber.
优选地，所述第一单波长辐射高温计和所述第二单波长辐射高温计采用不同的辐射波长。Preferably, the first single-wavelength radiation pyrometer and the second single-wavelength radiation pyrometer employ different radiation wavelengths.
优选地，所述逐步提高预氧化仓的露点包括步骤：Preferably, the step of gradually increasing the dew point of the pre-oxidation chamber comprises the steps of:
确定单位露点差值；Determine the unit dew point difference;
在前一个露点数值上增加所述单位露点差值，以得到相邻的后一个露点数值。The unit dew point difference value is added to the previous dew point value to obtain the next adjacent dew point value.
优选地，所述逐步提高预氧化仓的氧含量包括步骤：Preferably, the step of gradually increasing the oxygen content of the pre-oxidation chamber comprises the steps of:
确定单位氧含量差值；Determine the difference in unit oxygen content;
在前一个氧含量数值上增加所述单位氧含量差值，以得到相邻的后一个氧含量数值。The unit oxygen content difference value is added to the previous oxygen content value to obtain the adjacent subsequent oxygen content value.
优选地，在所述确定带钢预氧化仓出口位置的氧化膜厚度之后还包括步骤：Preferably, after the determination of the thickness of the oxide film at the outlet of the strip steel pre-oxidation chamber, the following steps are further included:
获取所述带钢预氧化仓出口位置的氧化膜厚度；Obtain the thickness of the oxide film at the outlet of the strip pre-oxidation chamber;
采用插值法确定带钢其他位置的氧化膜厚度。Use interpolation to determine the thickness of the oxide film at other locations on the strip.
本发明实施例中的一个或多个技术方案，至少具有如下技术效果或优点：One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
本申请提供的一种高强钢镀锌产线氧化膜厚度检测方法，利用氧化膜生长对带钢表面辐射率变化的影响规律，通过温度测温值反应出氧化膜厚度变化情况；利用带钢表面氧化膜对辐射波的干涉原理，通过测量温度值的极值点对应的波程差，估算出带钢表面氧化膜的厚度数值。通过该方式，可对预氧化仓出口位置氧化膜厚度进行测量，以保证高强钢表面质量，此方法简单，易于操作，成本低廉。The present application provides a method for detecting the oxide film thickness of a high-strength steel galvanizing production line, which utilizes the influence law of oxide film growth on the change of the surface emissivity of the strip steel, and reflects the change in the thickness of the oxide film through the temperature measurement value; Based on the interference principle of the oxide film on the radiation wave, the thickness value of the oxide film on the surface of the strip steel is estimated by measuring the wave path difference corresponding to the extreme point of the temperature value. In this way, the thickness of the oxide film at the outlet of the pre-oxidation bin can be measured to ensure the surface quality of the high-strength steel. This method is simple, easy to operate, and low in cost.
附图说明Description of drawings
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图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获得其它的附图。In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.
图1是现有技术中氧化膜对波的干涉作用示意图；1 is a schematic diagram of the interference effect of oxide film on waves in the prior art;
图2是本发明实施例提供的一种高强钢镀锌产线氧化膜厚度检测方法中氧化膜对辐射波的干涉作用示意图。2 is a schematic diagram of the interference effect of the oxide film on the radiation wave in a method for detecting the oxide film thickness of a high-strength steel galvanizing production line provided by an embodiment of the present invention.
具体实施方式Detailed ways
下文将结合具体实施方式和实施例，具体阐述本发明，本发明的优点和各种效果将由此更加清楚地呈现。本领域技术人员应理解，这些具体实施方式和实施例是用于说明本发明，而非限制本发明。The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly presented therefrom. It should be understood by those skilled in the art that these specific embodiments and examples are used to illustrate the present invention, but not to limit the present invention.
在整个说明书中，除非另有特别说明，本文使用的术语应理解为如本领域中通常所使用的含义。因此，除非另有定义，本文使用的所有技术和科学术语具有与本发明所属领域技术人员的一般理解相同的含义。若存在矛盾，本说明书优先。Throughout the specification, unless specifically stated otherwise, terms used herein are to be understood as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification takes precedence.
除非另有特别说明，本发明中用到的各种原材料、试剂、仪器和设备等，均可通过市场购买得到或者可通过现有方法制备得到。Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or can be prepared by existing methods.
参见图1和2，本发明提供了一种高强钢镀锌产线氧化膜厚度检测方法，所述方法包括步骤：Referring to Figures 1 and 2, the present invention provides a method for detecting oxide film thickness of a high-strength steel galvanizing production line, the method comprising the steps of:
在高强钢预氧化仓入口配备楔形高温计，在高强钢预氧化仓出口配备单波长辐射高温计；Equipped with a wedge-shaped pyrometer at the entrance of the high-strength steel pre-oxidation chamber, and equipped with a single-wavelength radiation pyrometer at the outlet of the high-strength steel pre-oxidation chamber;
分别使用所述楔形高温计和所述单波长辐射高温计测量高强钢预氧化仓入口和高强钢预氧化仓出口的温度；Using the wedge pyrometer and the single-wavelength radiation pyrometer to measure the temperature at the inlet of the high-strength steel pre-oxidation bin and the outlet of the high-strength steel pre-oxidation bin;
保持带钢运动速度及预氧化仓入口温度固定；Keep the speed of the strip steel and the inlet temperature of the pre-oxidation chamber fixed;
保证氧化温度及氧化时间固定，逐步提高预氧化仓的露点或氧含量；Ensure that the oxidation temperature and oxidation time are fixed, and gradually increase the dew point or oxygen content of the pre-oxidation chamber;
记录所述楔形高温计和所述单波长辐射高温计的测温值；Record the temperature measurement values of the wedge pyrometer and the single-wavelength radiation pyrometer;
根据所述单波长高温计测温值的极值点，确定带钢预氧化仓出口位置的氧化膜厚度。According to the extreme point of the temperature measured by the single-wavelength pyrometer, determine the thickness of the oxide film at the outlet of the strip steel pre-oxidation chamber.
参见图1和2，在本申请实施例中，可以认为氧化膜厚度的2倍近似等于光程差，故可得，所述带钢预氧化仓出口位置的氧化膜厚度的计算公式为：1 and 2, in the embodiment of the present application, it can be considered that twice the thickness of the oxide film is approximately equal to the optical path difference, so it can be obtained that the calculation formula of the thickness of the oxide film at the outlet of the strip steel pre-oxidation chamber is:
其中，d为所述带钢预氧化仓出口位置的氧化膜厚度，λ为所述单波长高温计的辐射波长。Wherein, d is the thickness of the oxide film at the outlet of the strip pre-oxidation chamber, and λ is the radiation wavelength of the single-wavelength pyrometer.
在本申请实施例中，所述在高强钢预氧化仓出口配备单波长辐射高温计包括：在高强钢预氧化仓出口配备第一单波长辐射高温计和第二单波长辐射高温计。In the embodiment of the present application, the step of configuring a single-wavelength radiation pyrometer at the outlet of the high-strength steel pre-oxidation bin includes: configuring a first single-wavelength radiation pyrometer and a second single-wavelength radiation pyrometer at the outlet of the high-strength steel pre-oxidation chamber.
在本申请实施例中，为了提高对带钢预氧化仓出口位置的氧化膜厚度的计算精准度，可以采用两个单波长辐射高温计对带钢预氧化仓出口位置的温度进行测量，从而可以分别计算出两个带钢预氧化仓出口位置的氧化膜厚度数值，并对这两个数据进行对比，若数据相等或者相差数值处于误差范围内，则认为计算得出的氧化膜厚度准确；若相差数值超过误差范围，可以再次进行测量，从而避免了只采用一个单波长辐射高温计时所得出的数据可能存在错误的情况发生。In the embodiment of the present application, in order to improve the calculation accuracy of the thickness of the oxide film at the outlet of the strip pre-oxidation chamber, two single-wavelength radiation pyrometers can be used to measure the temperature at the outlet of the strip pre-oxidation chamber, so that the Calculate the thickness of the oxide film at the outlet of the two strip pre-oxidation bins respectively, and compare the two data. If the data are equal or the difference is within the error range, the calculated oxide film thickness is considered accurate; if If the difference value exceeds the error range, the measurement can be repeated, thus avoiding the possibility of error in the data obtained by using only a single wavelength radiation pyrometer.
在本申请实施例中，所述第一单波长辐射高温计和所述第二单波长辐射高温计采用不同的辐射波长。当第一单波长辐射高温计和第二单波长辐射高温计采用不同的辐射波长λ1和λ2时，可以根据带钢预氧化仓出口位置的氧化膜厚度的计算公式分别计算出带钢预氧化仓出口位置的氧化膜厚度，即为：In the embodiment of the present application, the first single-wavelength radiation pyrometer and the second single-wavelength radiation pyrometer use different radiation wavelengths. When the first single-wavelength radiation pyrometer and the second single-wavelength radiation pyrometer use different radiation wavelengths λ 1 and λ 2 , the strip pre-oxidation chamber can be calculated according to the formula for calculating the thickness of the oxide film at the outlet of the strip pre-oxidation chamber. The thickness of the oxide film at the outlet of the oxidation chamber is:
理论上，在相同时刻计算的带钢预氧化仓出口位置的氧化膜厚度为唯一确定值，也即d1＝d2。而实际中，由于测量误差的存在，d1和d2可能相等，也可能存在一定的差值，若此差值处于误差范围内，则认为计算得出的氧化膜厚度准确；若此差值超过误差范围，可以再次进行测量，从而避免了采用两个辐射波长相等的单波长辐射高温计时所得出的数据可能存在错误的情况发生。Theoretically, the thickness of the oxide film at the outlet of the strip pre-oxidation chamber calculated at the same time is the only determined value, that is, d 1 =d 2 . In practice, due to the existence of measurement error, d 1 and d 2 may be equal, or there may be a certain difference. If the difference is within the error range, the calculated oxide film thickness is considered accurate; Beyond the margin of error, the measurement can be repeated, thus avoiding possible errors in data obtained from two single-wavelength radiation pyrometers with equal radiation wavelengths.
在本申请实施例中，所述逐步提高预氧化仓的露点包括步骤：In the embodiment of the present application, the step of gradually increasing the dew point of the pre-oxidation tank includes the steps:
确定单位露点差值；Determine the unit dew point difference;
在前一个露点数值上增加所述单位露点差值，以得到相邻的后一个露点数值。The unit dew point difference value is added to the previous dew point value to obtain the next adjacent dew point value.
具体地，单位露点差值为每次提高露点数值时所增加的变化值，此单位露点差值可以根据实际需要选择。比如，为了提高氧化膜厚度计算的精度，降低由于所选择的露点之间间距过大而带来的过大误差，可以选择比较小的单位露点差值，如此可以得到更准确的单波长辐射高温计测温值变化曲线，从而可以更准确的判断其极值点，进而计算出在此极值点下的氧化膜厚度。Specifically, the unit dew point difference value is the change value that increases each time the dew point value is increased, and the unit dew point difference value can be selected according to actual needs. For example, in order to improve the accuracy of the calculation of the thickness of the oxide film and reduce the excessive error caused by the excessive spacing between the selected dew points, a relatively small unit dew point difference can be selected, so that a more accurate single-wavelength radiation high temperature can be obtained. The temperature value change curve is measured, so that the extreme value point can be judged more accurately, and the oxide film thickness at this extreme value point can be calculated.
在本申请实施例中，所述逐步提高预氧化仓的氧含量包括步骤：In the embodiment of the present application, the step of gradually increasing the oxygen content of the pre-oxidation chamber includes the steps:
确定单位氧含量差值；Determine the difference in unit oxygen content;
在前一个氧含量数值上增加所述单位氧含量差值，以得到相邻的后一个氧含量数值。The unit oxygen content difference value is added to the previous oxygen content value to obtain the adjacent subsequent oxygen content value.
具体地，单位氧含量差值为每次提高氧含量数值时所增加的变化值，此单位氧含量差值可以根据实际需要选择。比如，为了提高氧化膜厚度计算的精度，降低由于所选择的氧含量之间间距过大而带来的过大误差，可以选择比较小的单位氧含量差值，如此可以得到更准确的单波长辐射高温计测温值变化曲线，从而可以更准确的判断其极值点，进而计算出在此极值点下的氧化膜厚度。Specifically, the unit oxygen content difference is a change value that is increased each time the oxygen content value is increased, and the unit oxygen content difference can be selected according to actual needs. For example, in order to improve the accuracy of the calculation of the thickness of the oxide film and reduce the excessive error caused by the excessive spacing between the selected oxygen contents, a relatively small difference in the unit oxygen content can be selected, so that a more accurate single wavelength can be obtained. The temperature value change curve of the radiation pyrometer can be determined more accurately, and the oxide film thickness at this extreme point can be calculated.
在本申请实施例中，在所述确定带钢预氧化仓出口位置的氧化膜厚度之后还包括步骤：In the embodiment of the present application, after the determination of the thickness of the oxide film at the outlet of the strip steel pre-oxidation bin, the following steps are further included:
获取所述带钢预氧化仓出口位置的氧化膜厚度；Obtain the thickness of the oxide film at the outlet of the strip pre-oxidation chamber;
采用插值法确定带钢其他位置的氧化膜厚度。Use interpolation to determine the thickness of the oxide film at other locations on the strip.
在本申请实施例中，当计算出带钢预氧化仓出口位置的氧化膜厚度时，由于带钢预氧化仓入口位置的氧化膜厚度为0(预氧化仓入口位置还未发生氧化反应，故氧化膜厚度近似等于0)，且带钢运动速度恒定，预氧化仓入口温度恒定，氧化温度及氧化时间恒定，露点或者氧含量也为线性均匀增加，故而带钢表面的氧化膜厚度也为线性均匀增加，带钢预氧化仓入口位置的氧化膜厚度为0，而在预氧化仓出口位置的氧化膜厚度为d，此时可以根据插值法计算出带钢表面其他位置的氧化膜厚度。In the embodiment of the present application, when calculating the thickness of the oxide film at the outlet of the strip pre-oxidation chamber, since the thickness of the oxide film at the inlet of the strip pre-oxidation chamber is 0 (the oxidation reaction has not yet occurred at the inlet of the pre-oxidation chamber, so The thickness of the oxide film is approximately equal to 0), and the moving speed of the strip is constant, the inlet temperature of the pre-oxidation chamber is constant, the oxidation temperature and oxidation time are constant, and the dew point or oxygen content also increases linearly and uniformly, so the thickness of the oxide film on the surface of the strip is also linear. The thickness of the oxide film at the entrance of the strip pre-oxidation chamber is 0, and the thickness of the oxide film at the outlet of the pre-oxidation chamber is d. At this time, the thickness of the oxide film at other positions on the strip surface can be calculated according to the interpolation method.
下面以具体实施例对本申请进行详细描述。The present application will be described in detail below with specific embodiments.
本实施例采用热镀锌高强钢产线预氧化仓出口位置带钢表面氧化膜厚度的测定为例。在本发明实施例中，提供了厚度为0.8mm、宽度为0300mm的热镀锌DP780+Z热镀锌双相钢产品的生产：This embodiment takes the measurement of the thickness of the oxide film on the surface of the strip steel at the outlet of the pre-oxidation bin of the hot-dip galvanizing high-strength steel production line as an example. In the embodiment of the present invention, the production of hot-dip galvanized DP780+Z hot-dip galvanized dual-phase steel product with a thickness of 0.8 mm and a width of 0,300 mm is provided:
在生产过程中，设定预氧化仓入口温度为650℃(也即楔形高温计的测温值恒定为650℃)，带钢运动速度为90m/min，预氧化仓内部电阻丝功率恒定控制为120KW/h。预氧化仓内部初始成分包括4％H2和96％N2，之后，逐步将H2含量降低至1％，并将蒸汽发生器开启，将预氧化层内部露点分别稳定在-50℃，-45℃，-40℃，-35℃，-30℃，-25℃，-20℃，-15℃，-10℃，-5℃，0℃，5℃，10℃，并记录单波长高温计1(测温值为T1)及单波长高温计2(测温值为T2)分别显示的温度值，具体如下表：In the production process, the inlet temperature of the pre-oxidation chamber is set to 650°C (that is, the temperature measurement value of the wedge-shaped pyrometer is constant at 650°C), the speed of the strip steel is 90m/min, and the power of the resistance wire inside the pre-oxidation chamber is controlled to be constant as 120KW/h. The initial composition in the pre-oxidation chamber includes 4% H2 and 96% N2. After that, the H2 content is gradually reduced to 1%, and the steam generator is turned on to stabilize the internal dew point of the pre-oxidation layer at -50°C, -45°C, respectively. -40°C, -35°C, -30°C, -25°C, -20°C, -15°C, -10°C, -5°C, 0°C, 5°C, 10°C, and record the single wavelength pyrometer 1 (measured The temperature value is T1) and the temperature value displayed by the single-wavelength pyrometer 2 (the temperature measurement value is T2), as shown in the following table:
1号高温计测量温度T1对应极值点为-15℃，在该露点下预氧化仓出口位置氧化膜厚度达到高温计波长的一半，即
2号高温计测量温度T2对应极值点位-0℃，在该露点下预氧化仓出口位置氧化膜厚度达到高温计波长的一半，即
-60℃露点时，近似认为预氧化仓内部完全为还原性气氛，带钢表面氧化膜近似认为为0，之后采用插值法近似确定各个露点条件下氧化膜的厚度。When the dew point is -60 °C, it is approximately considered that the interior of the pre-oxidation chamber is completely reducing atmosphere, and the oxide film on the surface of the strip is approximately considered to be 0. After that, the thickness of the oxide film at each dew point is approximately determined by interpolation method.
本申请提供的一种高强钢镀锌产线氧化膜厚度检测方法，利用氧化膜生长对带钢表面辐射率变化的影响规律，通过温度测温值反应出氧化膜厚度变化情况；利用带钢表面氧化膜对辐射波的干涉原理，通过测量温度值的极值点对应的波程差，估算出带钢表面氧化膜的厚度数值。通过该方式，可对预氧化仓出口位置氧化膜厚度进行测量，以保证高强钢表面质量，此方法简单，易于操作，成本低廉。The present application provides a method for detecting the oxide film thickness of a high-strength steel galvanizing production line, which utilizes the influence law of oxide film growth on the change of the surface emissivity of the strip steel, and reflects the change in the thickness of the oxide film through the temperature measurement value; Based on the interference principle of the oxide film on the radiation wave, the thickness value of the oxide film on the surface of the strip steel is estimated by measuring the wave path difference corresponding to the extreme point of the temperature value. In this way, the thickness of the oxide film at the outlet of the pre-oxidation bin can be measured to ensure the surface quality of the high-strength steel. This method is simple, easy to operate, and low in cost.
最后，还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。Finally, it should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Also included are other elements not expressly listed or inherent to such a process, method, article or apparatus.
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
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