CN115821088A - Induction smelting intermittent ingot-pulling type semi-continuous casting titanium alloy ingot casting method - Google Patents
Induction smelting intermittent ingot-pulling type semi-continuous casting titanium alloy ingot casting method Download PDFInfo
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- 230000006698 induction Effects 0.000 title claims abstract description 119
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 62
- 238000005266 casting Methods 0.000 title claims abstract description 26
- 238000009749 continuous casting Methods 0.000 title claims abstract description 16
- 238000003723 Smelting Methods 0.000 title claims description 49
- 239000000498 cooling water Substances 0.000 claims abstract description 69
- 238000002844 melting Methods 0.000 claims abstract description 63
- 230000008018 melting Effects 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims description 63
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 46
- 229910052802 copper Inorganic materials 0.000 claims description 46
- 239000010949 copper Substances 0.000 claims description 46
- 230000008569 process Effects 0.000 claims description 31
- 238000005242 forging Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005304 joining Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 73
- 239000000126 substance Substances 0.000 description 47
- 239000000155 melt Substances 0.000 description 19
- 230000007246 mechanism Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 11
- 238000009616 inductively coupled plasma Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910001093 Zr alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
Description
技术领域technical field
本发明涉及金属材料加工领域，特别是指一种改善钛合金铸锭成分均匀性的感应熔炼间歇拉锭式半连续铸造的钛合金铸锭方法。The invention relates to the field of metal material processing, in particular to a titanium alloy ingot casting method for induction melting intermittent ingot drawing semi-continuous casting which improves the composition uniformity of titanium alloy ingots.
背景技术Background technique
钛合金因其比强度高、耐腐蚀性好，在航空航天领域有广阔的应用前景，可用于生产大型复杂薄壁锻件。锻造用钛合金铸锭要求铸锭成分均匀、致密度高、组织均匀。目前钛合金铸锭基本采用真空自耗电弧(VAR)炉进行熔炼，一般经过3次以上VAR熔炼才能达到航空航天级锻造用钛合金铸锭要求。然而VAR法不仅生产周期长，对熔炼原料要求高，而且部分原料容易未充分熔化直接与铸锭基体熔合，导致铸锭局部偏析严重，即使采用多次VAR法熔炼也不易消除，因而导致VAR法无法满足钛合金铸锭的高质量熔炼要求。Due to its high specific strength and good corrosion resistance, titanium alloy has broad application prospects in the aerospace field, and can be used to produce large complex thin-walled forgings. Titanium alloy ingots for forging require uniform composition, high density and uniform structure. At present, titanium alloy ingots are basically smelted in a vacuum consumable arc (VAR) furnace. Generally, more than 3 times of VAR smelting can be used to meet the requirements of titanium alloy ingots for aerospace grade forging. However, the VAR method not only has a long production cycle, but also has high requirements for smelting raw materials, and some raw materials are easily not fully melted and directly fused with the ingot matrix, resulting in serious local segregation of the ingot, which is not easy to eliminate even if multiple VAR methods are used. It cannot meet the high-quality smelting requirements of titanium alloy ingots.
真空感应熔炼法可以在真空条件下，通过感应加热、电磁搅拌使熔池温度分布和成分均匀化，减少宏观、微观偏析，且真空感应熔炼对原料要求较低，可确保熔炼原料充分熔化，有效去除低、高密度夹杂，通过一次熔炼即可实现对钛、锆等高化学活性合金的高质量熔炼。但目前真空感应熔炼法熔炼高化学活性合金所采用的水冷铜坩埚透磁率及电源功率有限，可用水冷铜坩埚内径尺寸受限，单批次熔炼无法生产大型铸锭，最大铸锭重量单批次约为50kg。中国专利202010743280.0公开了一种钛及钛合金铸锭的真空感应熔炼方法，该方法实现了单批次熔炼最大100kg重量的钛及钛合金铸锭，且通过真空连续加料、感应熔炼、连续拉锭实现了重量大于100kg、直径可达
采用感应熔炼间歇拉锭式半连续铸造的钛合金铸锭方法，在感应熔炼过程中对不同熔体量的凝固铸锭移动相同的下行距离，容易使前一批次原料熔炼的铸锭,因感应加热而发生原子扩散甚至发生重熔，使铸锭衔接区产生成分不均匀分布，造成铸锭衔接区形成局部成分偏析缺陷。此外，若感应加热的功率与水冷铜坩埚的冷却效果没有搭配得当，尤其随着铸锭直径增大，铸锭内部沿径向极易产生成分分布的不均匀性，形成难以控制的偏析缺陷，在后处理中也不易消除，严重影响零件的性能。The titanium alloy ingot casting method adopts the induction melting intermittent ingot drawing semi-continuous casting method. During the induction melting process, the solidified ingots with different melt amounts move the same downward distance, which is easy to melt the ingots from the previous batch of raw materials. Atom diffusion or even remelting occurs due to induction heating, resulting in uneven distribution of components in the joint area of ingots, resulting in local composition segregation defects in the joint area of ingots. In addition, if the power of induction heating is not properly matched with the cooling effect of the water-cooled copper crucible, especially as the diameter of the ingot increases, the inhomogeneity of the composition distribution along the radial direction will easily occur inside the ingot, forming segregation defects that are difficult to control. It is also not easy to eliminate in post-processing, which seriously affects the performance of parts.
为了改善感应熔炼间歇拉锭钛合金铸锭衔接区和铸锭径向的成分均匀性，本领域亟待研发一种新的工艺控制方法，实现对感应熔炼间歇拉锭式半连续铸造的钛合金铸锭的高质量熔炼，更好的满足航空航天级钛合金锻件的生产要求。In order to improve the compositional uniformity of the ingot joint area and the radial direction of the ingot in the induction melting intermittent ingot drawing titanium alloy ingot, it is urgent to develop a new process control method in this field to realize the titanium alloy casting of the induction melting intermittent ingot drawing semi-continuous casting. The high-quality smelting of ingots can better meet the production requirements of aerospace-grade titanium alloy forgings.
发明内容Contents of the invention
本发明的目的在于通过精确工艺控制，改善感应熔炼间歇拉锭钛合金铸锭整体的成分均匀性，重点改善大型钛合金铸锭衔接区的成分均匀性，提供一种感应熔炼间歇拉锭式半连续铸造的钛合金铸锭方法。The purpose of the present invention is to improve the overall compositional uniformity of the induction melting intermittent ingot-drawing titanium alloy ingot through precise process control, focusing on improving the compositional uniformity of the large-scale titanium alloy ingot joint area, and to provide an induction melting intermittent ingot-drawing semi- Titanium alloy ingot casting method for continuous casting.
本发明的目的通过下述技术方案实现：The object of the present invention is achieved through the following technical solutions:
一种感应熔炼间歇拉锭式半连续铸造的钛合金铸锭方法，采用间歇拉锭式感应熔炼炉及其熔炼工艺，其特征在于：该方法是指精准控制关键熔炼工艺参数，包括每批次熔炼熔体量、感应加热功率、冷却水流量、凝固铸锭下行距离的设定及其优化组合，具体包括以下工艺条件：A titanium alloy ingot casting method for induction smelting intermittent ingot-drawing semi-continuous casting, using an intermittent ingot-drawing induction melting furnace and its smelting process, characterized in that: the method refers to the precise control of key smelting process parameters, including each batch The setting and optimal combination of smelting melt volume, induction heating power, cooling water flow rate, and downlink distance of solidified ingots specifically include the following process conditions:
(1)根据铸锭重量和每批次熔炼熔体量，设定批次，按铸锭重量均分确定每批次熔炼的钛合金原料重量，并将第一批次熔炼的钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚中，设定感应加热功率为300-1200kW，冷却水流量为0.5-3.0m3/h，原料完全熔化后关闭感应电源，继续控制水冷铜坩埚内的冷却水流量至铸锭凝固；(1) According to the weight of the ingot and the amount of smelted melt in each batch, set the batch, determine the weight of the titanium alloy raw material smelted in each batch according to the weight of the ingot, and place the titanium alloy raw material smelted in the first batch In the water-cooled copper crucible in the intermittent ingot-pulling induction melting furnace, set the induction heating power to 300-1200kW, and the cooling water flow to 0.5-3.0m 3 /h. After the raw materials are completely melted, turn off the induction power supply and continue to control the water-cooled copper crucible. The cooling water flow in the ingot is solidified;
(2)根据每批次熔炼的钛合金铸锭高度设定间歇拉锭工艺的凝固铸锭下行距离，所述凝固铸锭下行距离为180-300mm，同时完成第二批次熔炼的钛合金原料的加料过程；打开感应电源，设定感应加热功率为300-1200kW，冷却水流量为0.5-3.0m3/h，待钛合金原料完全熔化后关闭感应电源，继续控制水冷铜坩埚内的冷却水流量至铸锭凝固；(2) Set the descending distance of the solidified ingot in the intermittent ingot drawing process according to the height of the titanium alloy ingots smelted in each batch. The descending distance of the solidified ingots is 180-300mm, and the second batch of smelted titanium alloy raw materials is completed at the same time The feeding process; turn on the induction power supply, set the induction heating power to 300-1200kW, and the cooling water flow rate to 0.5-3.0m 3 /h, turn off the induction power supply after the titanium alloy raw material is completely melted, and continue to control the cooling water in the water-cooled copper crucible flow until the ingot solidifies;
(3)重复若干次(2)，直至均分成多批次熔炼的钛合金原料全部加入坩埚，并完成熔炼，得到钛合金铸锭。(3) Repeat (2) several times until all the titanium alloy raw materials that are divided into multiple batches for melting are added to the crucible, and the melting is completed to obtain a titanium alloy ingot.
进一步，所述每批次熔炼熔体量控制范围在50-100kg，凝固铸锭下行距离控制范围在220-280mm之间，所述感应热源功率控制范围在500-1000kW，所述冷却水流量控制范围在1.0-2.5m3/h。Further, the control range of each batch of smelting melt amount is 50-100kg, the control range of the downlink distance of the solidified ingot is between 220-280mm, the control range of the induction heat source power is 500-1000kW, and the cooling water flow control The range is 1.0-2.5m 3 /h.
进一步，所述每批次熔炼熔体量控制范围在90-100kg，凝固铸锭下行距离控制范围在235-260mm之间，所述感应热源功率控制范围在900-1000kW，所述冷却水流量控制范围在2.2-2.5m3/h。Further, the control range of the amount of smelting melt per batch is 90-100kg, the control range of the downlink distance of the solidified ingot is between 235-260mm, the power control range of the induction heat source is 900-1000kW, and the cooling water flow control The range is 2.2-2.5m 3 /h.
最佳优化组合，所述每批次熔炼熔体量控制在100kg，凝固铸锭下行距离控制范围在260mm，所述感应热源功率控制范围在1000kW，所述冷却水流量控制范围在2.5m3/h。The best optimized combination, the amount of smelting melt in each batch is controlled at 100kg, the control range of the downlink distance of the solidified ingot is 260mm, the power control range of the induction heat source is 1000kW, and the flow control range of the cooling water is 2.5m 3 / h.
本发明相对于现有技术具有如下的突出优点及效果：Compared with the prior art, the present invention has the following outstanding advantages and effects:
1、本发明在感应熔炼间歇拉锭式半连续铸造钛合金铸锭的过程中，根据设定的每批次熔炼相同的熔体量，确定感应加热功率和冷却水流量的配合参数及对应的凝固铸锭下行距离，通过优化组合工艺参数并精确控制，可以规范每批次原料熔炼过程中感应加热功率、冷却水流量及凝固铸锭下行距离关键生产参数，提高每批次原料熔炼质量的稳定性。1. In the process of induction smelting intermittent ingot-drawing semi-continuous casting of titanium alloy ingots, the present invention determines the matching parameters of induction heating power and cooling water flow rate and the corresponding Downward distance of solidified ingots, by optimizing the combination of process parameters and precise control, the key production parameters of induction heating power, cooling water flow rate and the downward distance of solidified ingots during the smelting process of each batch of raw materials can be regulated, and the stability of smelting quality of each batch of raw materials can be improved sex.
2、本发明有效控制了径向上及铸锭衔接区的成分均匀性，改善感应熔炼间歇拉锭式半连续铸造的钛合金铸锭整体成分均匀性，尤其适用于随着铸锭直径增大，控制钛合金铸锭径向上的成分均匀性难度增大的大直径钛合金铸锭的制备，有望实现对感应熔炼间歇拉锭式半连续铸造的钛合金铸锭的高质量熔炼，以进一步满足航空航天级钛合金锻件的生产要求。2. The present invention effectively controls the uniformity of composition in the radial direction and in the joint area of the ingot, and improves the uniformity of the overall composition of the titanium alloy ingot for induction melting intermittent ingot-drawing semi-continuous casting, and is especially suitable for increasing the diameter of the ingot. The preparation of large-diameter titanium alloy ingots, which is more difficult to control the composition uniformity in the radial direction of titanium alloy ingots, is expected to achieve high-quality smelting of titanium alloy ingots for induction melting intermittent ingot-drawing semi-continuous casting, so as to further meet the needs of aviation industry. Production requirements for aerospace grade titanium alloy forgings.
附图说明Description of drawings
图1是间歇拉锭式感应熔炼炉内结构描述两批次原料熔炼的钛合金铸锭铸造工艺过程示意图；Fig. 1 is a schematic diagram of the titanium alloy ingot casting process for the internal structure description of two batches of raw material smelting in an intermittent ingot-drawing induction melting furnace;
图中：1为冷却水管道，2为感应线圈，3为水冷铜坩埚，4为第二批次熔炼铸锭，5为铸锭衔接区，6为间歇拉锭前第一批次熔炼的铸锭(指虚线框内区域)，7为间歇拉锭后第一批次熔炼的铸锭，8为间歇拉锭机构引锭头。In the figure: 1 is the cooling water pipeline, 2 is the induction coil, 3 is the water-cooled copper crucible, 4 is the second batch of ingot melting, 5 is the ingot connecting area, and 6 is the first batch of ingot melting before the intermittent ingot drawing. Ingot (referring to the area in the dotted line frame), 7 is the first batch of smelted ingots after the intermittent ingot drawing, and 8 is the dummy head of the intermittent ingot drawing mechanism.
具体实施方式Detailed ways
下面结合实施例及附图对本发明作进一步详细的描述，但本发明的实施方式不限于此。The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
实施例1Example 1
如图1所示，本发明用间歇拉锭式感应熔炼炉内结构示意图描述两批次原料熔炼的钛合金铸锭铸造工艺过程示意图。采用图1所示的间歇拉锭式感应熔炼炉，其间歇拉锭机构引锭头8和内径尺寸为
步骤一：50kg的TC4钛合金原料在水冷铜坩埚内完全熔化的熔体高度约为400mm，为防止熔体溢出，将原料均分为两批次进行熔炼，每批次熔炼熔体量为25kg，将间歇拉锭式感应熔炼炉的真空度抽至0.5Pa，并将第一批次熔炼的25kgTC4钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚3中；设定感应线圈2的感应加热功率为300kW，冷却水管道1的冷却水流量为0.5m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水管道1内的冷却水流量维持在0.5m3/h，使铸锭凝固，得到第一批次熔炼铸锭6，即指图1的虚线框内区域。Step 1: The melt height of 50kg of TC4 titanium alloy raw material completely melted in the water-cooled copper crucible is about 400mm. In order to prevent the melt from overflowing, the raw material is divided into two batches for smelting, and the melt volume of each batch is 25kg , the vacuum degree of the intermittent ingot-drawing induction melting furnace is evacuated to 0.5Pa, and the 25kgTC4 titanium alloy raw material melted in the first batch is placed in the water-cooled
步骤二：每25kg熔体量的TC4钛合金在
步骤三：设定感应线圈2的感应加热功率为300kW，冷却水管道1的冷却水流量为0.5m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水流量维持在0.5m3/h使第二批次熔炼铸锭4凝固，即完成本实施例的全部熔炼，得到直径约为
本实施例中，采用电感耦合等离子体发射光谱仪在铸锭不同位置测定化学成分，得到表1的50kgTC4钛合金铸锭不同位置的成分测定结果，结果显示实施例1的铸锭轴向的最大化学成分偏差为0.04％，径向的最大化学成分偏差为0.03％，铸锭衔接区5的化学成分与非衔接区最大化学成分为0.06％，50kg的TC4钛合金铸锭的轴向、径向以及衔接区的化学成分基本一致。In the present embodiment, the inductively coupled plasma emission spectrometer is used to measure the chemical composition at different positions of the ingot, and the composition measurement results of the different positions of the 50kgTC4 titanium alloy ingot in Table 1 are obtained. The results show that the axial maximum chemical composition of the ingot in Example 1 is The composition deviation is 0.04%, the maximum chemical composition deviation in the radial direction is 0.03%, the chemical composition of the ingot joint zone 5 and the maximum chemical composition of the non-cohesion zone are 0.06%, the axial, radial and radial directions of the 50kg TC4 titanium alloy ingot The chemical composition of the linking region is basically the same.
表1实施例1制备的50kgTC4钛合金铸锭不同位置的成分测定The composition determination of the different positions of the 50kgTC4 titanium alloy ingot prepared by the
实施例2Example 2
如图1所示，本发明用间歇拉锭式感应熔炼炉内结构示意图描述两批次原料熔炼的钛合金铸锭铸造工艺过程示意图。采用图1所示的间歇拉锭式感应熔炼炉，其间歇拉锭机构引锭头8和内径尺寸为
步骤一：200kg的TC4钛合金原料在水冷铜坩埚内完全熔化的熔体高度约为400mm，为了防止熔体溢出，将原料均分为两批次进行熔炼，每批次熔炼熔体量为100kg，将间歇拉锭式感应熔炼炉的真空度抽至0.5Pa，并将第一批次熔炼的100kgTC4钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚3中；设定感应线圈2的感应加热功率为1200kW，冷却水管道1的冷却水流量为3.0m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水管道1内的冷却水流量维持在3.0m3/h，使铸锭凝固，得到第一批次熔炼铸锭6，即指图1的虚线框内区域。Step 1: The melt height of 200kg of TC4 titanium alloy raw material completely melted in the water-cooled copper crucible is about 400mm. In order to prevent the melt from overflowing, the raw material is divided into two batches for smelting, and the melt volume of each batch is 100kg , the vacuum degree of the intermittent ingot-drawing induction melting furnace is evacuated to 0.5Pa, and the 100kgTC4 titanium alloy raw material melted in the first batch is placed in the water-cooled
步骤二：每100kg熔体量的TC4钛合金在
步骤三：设定感应线圈2的感应加热功率为1200kW，冷却水管道1的冷却水流量为3.0m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水流量维持在3.0m3/h使第二批次熔炼铸锭4凝固，即完成本实施例的全部熔炼，得到直径约为
本实施例中，采用电感耦合等离子体发射光谱仪在铸锭不同位置测定化学成分，得到表2的200kg TC4钛合金铸锭不同位置的成分测定结果，结果显示实施例2的铸锭轴向的最大化学成分偏差为0.04％，径向的最大化学成分偏差为0.09％，铸锭衔接区5的化学成分与非衔接区最大化学成分偏差为0.08％，200kg的TC4钛合金铸锭的轴向、径向以及衔接区的化学成分基本一致。In the present embodiment, adopt inductively coupled plasma emission spectrometer to measure chemical composition at different positions of the ingot, obtain the composition measurement results of the different positions of the 200kg TC4 titanium alloy ingot of Table 2, the result shows that the axial maximum of the ingot of
表2实施例2制备的200kgTC4钛合金铸锭不同位置的成分测定The composition determination of the different positions of the 200kgTC4 titanium alloy ingot prepared by the
实施例3Example 3
如图1所示，本发明用间歇拉锭式感应熔炼炉内结构示意图描述两批次原料熔炼的钛合金铸锭铸造工艺过程示意图。采用图1所示的间歇拉锭式感应熔炼炉，其间歇拉锭机构引锭头8和内径尺寸为
步骤一：100kg的TC4钛合金原料在水冷铜坩埚内完全熔化的熔体高度约为550mm，水冷铜坩埚无法一批次全部承接，须将原料均分为两批次进行熔炼，每批次熔炼熔体量为50kg，将间歇拉锭式感应熔炼炉的真空度抽至0.5Pa，并将第一批次熔炼的50kgTC4钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚3中；设定感应线圈2的感应加热功率为500kW，冷却水管道1的冷却水流量为1.0m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水管道1内的冷却水流量维持在1.0m3/h，使铸锭凝固，得到第一批次熔炼铸锭6，即指图1的虚线框内区域。Step 1: The melt height of 100kg of TC4 titanium alloy raw material completely melted in the water-cooled copper crucible is about 550mm. The water-cooled copper crucible cannot undertake all batches, and the raw materials must be divided into two batches for melting. The amount of melt is 50kg, the vacuum of the intermittent ingot-drawing induction melting furnace is evacuated to 0.5Pa, and the 50kg TC4 titanium alloy raw material melted in the first batch is placed in the water-cooled
步骤二：每50kg熔体量的TC4钛合金在
步骤三：设定感应线圈2的感应加热功率为500kW，冷却水管道1的冷却水流量为1.0m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水流量维持在1.0m3/h使第二批次熔炼铸锭4凝固，即完成本实施例的全部熔炼，得到直径约为
本实施例中，采用电感耦合等离子体发射光谱仪在铸锭不同位置测定化学成分，得到表3的100kg TC4钛合金铸锭不同位置的成分测定结果，结果显示实施例3的铸锭轴向的最大化学成分偏差为0.04％，径向的最大化学成分偏差为0.03％，铸锭衔接区5的化学成分与非衔接区最大化学成分偏差为0.07％，100kg的TC4钛合金铸锭的轴向、径向以及衔接区的化学成分基本一致。In the present embodiment, adopt inductively coupled plasma emission spectrometer to measure chemical composition at different positions of the ingot, obtain the composition measurement results of the different positions of the 100kg TC4 titanium alloy ingot of Table 3, the result shows that the axial maximum of the ingot of
表3实施例3制备的100kgTC4钛合金铸锭不同位置的成分测定The composition determination of the different positions of the 100kgTC4 titanium alloy ingot prepared by the
实施例4Example 4
如图1所示，本发明用间歇拉锭式感应熔炼炉内结构示意图描述两批次原料熔炼的钛合金铸锭铸造工艺过程示意图。采用图1所示的间歇拉锭式感应熔炼炉，其间歇拉锭机构引锭头8和内径尺寸为
步骤一：110kg的TC4钛合金原料在水冷铜坩埚内完全熔化的熔体高度约为450mm，水冷铜坩埚无法一批次全部承接，须将原料均分为两批次进行熔炼，每批次熔炼熔体量为55kg，将间歇拉锭式感应熔炼炉的真空度抽至0.5Pa，并将第一批次熔炼的55kgTC4钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚3中；设定感应线圈2的感应加热功率为650kW，冷却水管道1的冷却水流量为1.5m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水管道1内的冷却水流量维持在1.5m3/h，使铸锭凝固，得到第一批次熔炼铸锭6，即指图1的虚线框内区域。Step 1: The melt height of 110kg of TC4 titanium alloy raw material completely melted in the water-cooled copper crucible is about 450mm. The water-cooled copper crucible cannot undertake all batches, and the raw materials must be divided into two batches for melting. The amount of melt is 55kg, the vacuum of the intermittent ingot-drawing induction melting furnace is evacuated to 0.5Pa, and the 55kg TC4 titanium alloy raw material melted in the first batch is placed in the water-cooled
步骤二：每55kg熔体量的TC4钛合金在
步骤三：设定感应线圈2的感应加热功率为650kW，冷却水管道1的冷却水流量为1.5m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水流量维持在1.5m3/h使第二批次熔炼铸锭4凝固，即完成本实施例的全部熔炼，得到直径约为
本实施例中，采用电感耦合等离子体发射光谱仪在铸锭不同位置测定化学成分，得到表4的110kg TC4钛合金铸锭不同位置的成分测定结果，结果显示实施例4的铸锭轴向的最大化学成分偏差为0.05％，径向的最大化学成分偏差为0.05％，铸锭衔接区5的化学成分与非衔接区最大化学成分偏差为0.08％，110kg的TC4钛合金铸锭的轴向、径向以及衔接区的化学成分基本一致。In the present embodiment, adopt inductively coupled plasma emission spectrometer to measure chemical composition at different positions of the ingot, obtain the composition measurement results of the different positions of the 110kg TC4 titanium alloy ingot of Table 4, the result shows that the axial maximum of the ingot of
表4实施例4制备的110kgTC4钛合金铸锭不同位置的成分测定The composition determination of the different positions of the 110kgTC4 titanium alloy ingot prepared by the
实施例5Example 5
如图1所示，本发明用间歇拉锭式感应熔炼炉内结构示意图描述两批次原料熔炼的钛合金铸锭铸造工艺过程示意图。采用图1所示的间歇拉锭式感应熔炼炉，其间歇拉锭机构引锭头8和内径尺寸为
步骤一：200kg的TC4钛合金原料在水冷铜坩埚内完全熔化的熔体高度约为520mm，水冷铜坩埚无法一批次全部承接，须将原料均分为两批次进行熔炼，每批次熔炼熔体量为100kg，将间歇拉锭式感应熔炼炉的真空度抽至0.5Pa，并将第一批次熔炼的100kgTC4钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚3中；设定感应线圈2的感应加热功率为1000kW，冷却水管道1的冷却水流量为2.5m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水管道1内的冷却水流量维持在2.5m3/h，使铸锭凝固，得到第一批次熔炼铸锭6，即指图1的虚线框内区域。Step 1: The melt height of 200kg of TC4 titanium alloy raw material completely melted in the water-cooled copper crucible is about 520mm. The water-cooled copper crucible cannot undertake all batches, so the raw materials must be divided into two batches for melting, and each batch of melting The amount of melt is 100kg, the vacuum degree of the intermittent ingot-drawing induction melting furnace is evacuated to 0.5Pa, and the 100kg TC4 titanium alloy raw material melted in the first batch is placed in the water-cooled
步骤二：每100kg熔体量的TC4钛合金在
步骤三：设定感应线圈2的感应加热功率为1000kW，冷却水管道1的冷却水流量为2.5m3/h，原料完全熔化后关闭感应线圈2电源，控制冷却水流量维持在2.5m3/h使第二批次熔炼铸锭4凝固，即完成本实施例的全部熔炼，得到直径约为
本实施例中，采用电感耦合等离子体发射光谱仪在铸锭不同位置测定化学成分，得到表5的200kg TC4钛合金铸锭不同位置的成分测定结果，结果显示实施例5的铸锭轴向的最大化学成分偏差为0.04％，径向的最大化学成分偏差为0.06％，铸锭衔接区5的化学成分与非衔接区最大化学成分为0.08％，200kg的TC4钛合金铸锭的轴向、径向以及衔接区的化学成分基本一致。In the present embodiment, adopt inductively coupled plasma emission spectrometer to measure chemical composition at different positions of ingot, obtain the composition measurement result of different positions of 200kg TC4 titanium alloy ingot of table 5, the result shows that the axial maximum of the ingot of embodiment 5 The chemical composition deviation is 0.04%, the maximum radial chemical composition deviation is 0.06%, the chemical composition of the ingot joint zone 5 and the maximum chemical composition of the non-cohesion zone are 0.08%, the axial and radial direction of the 200kg TC4 titanium alloy ingot And the chemical composition of the connecting region is basically the same.
表5实施例5制备的200kgTC4钛合金铸锭不同位置的成分测定The composition determination of the different positions of the 200kgTC4 titanium alloy ingot prepared by the embodiment 5 of table 5
实施例6Example 6
采用同实施例5的间歇拉锭式感应熔炼炉，其间歇拉锭机构引锭头和内径尺寸为
步骤一：360kg的TC4钛合金原料在水冷铜坩埚内完全熔化的熔体高度约为940mm，水冷铜坩埚无法一批次全部承接，须将原料均分为四批次进行熔炼，每批次熔炼熔体量为90kg，将间歇拉锭式感应熔炼炉的真空度抽至0.5Pa，并将第一批次熔炼的90kgTC4钛合金原料置于间歇拉锭式感应熔炼炉内的水冷铜坩埚中；设定感应线圈的感应加热功率为900kW，冷却水管道的冷却水流量为2.2m3/h，原料完全熔化后关闭感应线圈电源，控制冷却水管道内的冷却水流量维持在2.2m3/h，使铸锭凝固，得到第一批次熔炼铸锭。Step 1: The melt height of 360kg of TC4 titanium alloy raw material completely melted in the water-cooled copper crucible is about 940mm. The water-cooled copper crucible cannot undertake all batches, and the raw materials must be divided into four batches for smelting. Each batch of smelting The amount of melt is 90kg, the vacuum of the intermittent ingot-drawing induction melting furnace is evacuated to 0.5Pa, and the 90kg TC4 titanium alloy raw material melted in the first batch is placed in the water-cooled copper crucible in the intermittent ingot-drawing induction melting furnace; Set the induction heating power of the induction coil to 900kW, the cooling water flow rate of the cooling water pipe to 2.2m 3 /h, turn off the power supply of the induction coil after the raw material is completely melted, and control the cooling water flow rate in the cooling water pipe to maintain at 2.2m 3 /h, The ingot is allowed to solidify to obtain the first batch of smelted ingots.
步骤二：每90kg熔体量的TC4钛合金在
步骤三：设定感应线圈的感应加热功率为900kW，冷却水管道的冷却水流量为2.2m3/h，原料完全熔化后关闭感应线圈电源，控制冷却水流量维持在2.2m3/h使铸锭凝固，得到第二批次熔炼铸锭。Step 3: Set the induction heating power of the induction coil to 900kW, the cooling water flow rate of the cooling water pipe to 2.2m 3 /h, turn off the power supply of the induction coil after the raw material is completely melted, and control the cooling water flow rate to maintain at 2.2m 3 /h to make the casting The ingot solidifies and a second batch of smelted ingots is obtained.
步骤四：重复两次步骤三，直至均分成四批次熔炼的钛合金原料全部加入坩埚进行熔炼，得到直径约为
本实施例中，采用电感耦合等离子体发射光谱仪在铸锭不同位置测定化学成分，得到表6的360kg TC4钛合金铸锭不同位置的成分测定结果，结果显示实施例6的铸锭轴向的最大化学成分偏差为0.05％，径向的最大化学成分偏差为0.07％，铸锭衔接区5的化学成分与非衔接区最大化学成分偏差为0.08％，360kg的TC4钛合金铸锭的轴向、径向以及衔接区的化学成分基本一致。In the present embodiment, adopt inductively coupled plasma emission spectrometer to measure chemical composition at different positions of the ingot, obtain the composition measurement results of the different positions of the 360kg TC4 titanium alloy ingot of Table 6, the result shows that the axial maximum of the ingot of
表6实施例6制备的360kg TC4钛合金铸锭不同位置的成分测定The composition determination of the different positions of the 360kg TC4 titanium alloy ingot prepared by the
综上，实施例1-6制备的TC4钛合金铸锭的不同位置的化学成分基本一致，铸锭轴向的最大化学成分偏差为0.05％，径向的最大化学成分偏差为0.09％，铸锭衔接区的化学成分与非衔接区最大化学成分偏差为0.08％，此方法制备的感应熔炼间歇拉锭式半连续铸造TC4钛合金铸锭不仅在轴向上保持成分基本一致，而且在径向以及衔接区的成分均基本一致。In summary, the chemical compositions of the TC4 titanium alloy ingots prepared in Examples 1-6 are basically the same at different positions, the maximum chemical composition deviation in the axial direction of the ingot is 0.05%, and the maximum chemical composition deviation in the radial direction is 0.09%. The chemical composition of the joint zone and the maximum chemical composition deviation of the non-cohesion zone is 0.08%. The induction melting intermittent ingot-drawing semi-continuous casting TC4 titanium alloy ingot prepared by this method not only maintains the same composition in the axial direction, but also maintains the same composition in the radial direction and The components of the connecting regions are basically the same.
上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受上述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.
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