CN106498147B - 一种轧钢加热炉滑块的制备工艺 - Google Patents

一种轧钢加热炉滑块的制备工艺 Download PDF

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CN106498147B
CN106498147B CN201611155972.3A CN201611155972A CN106498147B CN 106498147 B CN106498147 B CN 106498147B CN 201611155972 A CN201611155972 A CN 201611155972A CN 106498147 B CN106498147 B CN 106498147B
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罗新生
林世文
李峨永
罗清明
麦吉昌
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Sichuan Desheng Group Vanadium Titanium Co Ltd
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Abstract

本发明公开一种轧钢加热炉滑块的制备工艺，包括：制备所述滑块的底部组件和顶部组件；将所述底部组件和所述顶部组件通过耐热螺栓连接后经喷丸处理后与所述加热炉的水冷管连接；所述底部组件材料为耐热合金，所述顶部组件材料为复合陶瓷；以重量份计，所述耐热合金组分包括：C0.1～0.3份、Si 0.2～1份、Mn1～3份、Cr25～32份、Co36～38份、Ni 14～18份、W 2～5份、Mo1～3份Ce 0.02～0.2份、Fe20～30份。所述工艺制得的滑块耐热性、抗压好。

Description

一种轧钢加热炉滑块的制备工艺
技术领域
本发明涉及冶金技术领域，具体涉及一种轧钢加热炉滑块的制备工艺。
背景技术
加热炉是轧钢厂中重要的设备，其作用是将钢锭或钢坯加热到轧制的温度，在推钢式加热炉中，钢锭或钢坯放在装有耐热滑块的纵水梁(即纵水管)上，由推钢机将钢锭或钢坯从加热炉尾部推送到加热炉炉头部完成加热。
现有的加热炉的耐热滑块一般尺寸为200×70×50mm，由耐热钢制成，且耐热滑块焊接在纵水梁上。存在生产过程中，耐热滑块受热后纵向膨胀力过大，导致纵水梁和耐热滑块焊接部位横向断裂的现象，导致纵水梁内的水外泄导致停炉，影响正常生产。
发明内容
有鉴于此，本申请提供了一种轧钢加热炉滑块的制备工艺，所述工艺制得的滑块耐热性、抗压好。
为解决上述技术问题，本发明提供的技术方案是一种轧钢加热炉滑块的制备工艺，包括：制备所述滑块的底部组件和顶部组件；将所述底部组件和所述顶部组件通过耐热螺栓连接后经喷丸处理后与所述加热炉的水冷管连接；所述底部组件材料为耐热合金，所述顶部组件材料为复合陶瓷；优选的，以重量份计，所述耐热合金组分包括：C0.1～0.3份、Si 0.2～1份、Mn1～3份、Cr 25～32份、Co36～38份、Ni 14～18份、W 2～5份、Mo1～3份Ce0.02～0.2份、Fe20～30份。
优选的，以重量份计，所述耐热合金组分包括：C0.1～0.15份、Si 0.2～0.5份、Mn1～2份、Cr 28～32份、Co36～38份、Ni 14～18份、W 2～3份、Mo 1～3份、Ce 0.02～0.1份、Fe20～30份。
优选的，以重量份计，所述耐热合金组分包括：C 0.15份、Si 0.5份、Mn 2份、Cr 28份、Co 36份、Ni17份、W3份、Mo 3份、Ce 0.1份、Fe25份。
优选的，以重量份计，所述耐热合金组还包括：S 0～0.005份、P 0～0.01份。
优选的，以重量份计，所述复合陶瓷组分包括：：Al2O3 85～95份、TiC 1～5份、WO31～5份、Ti0 1～8份、BeO 0.1～0.2份、Si 1～5份。
优选的，以重量份计，所述复合陶瓷组分包括：Al2O3 85～90份、TiC 1～5份、WO3 1～5份、Ti0 1～8份、BeO 0.1～0.2份、Si 3～5份。
优选的，以重量份计，所述复合陶瓷组分包括：Al2O3 90份、TiC 3份、WO3 3份、Ti05份、BeO 0.2份、Si 3份。
优选的，所述底部组件制备工艺包括：将含所述耐热合金组分的原料在氮气保护电阻炉中熔炼后浇筑得到铸件，所述铸件经固熔处理得到所述耐热合金。
优选的，所述固熔处理包括第一步固熔处理、第二步固熔处理、第三步固熔处理和第四步固熔处理，所述第一步固熔处理、所述第二步固熔处理、所述第三步固熔处理和所述第四步固熔处理均包括：升温至400～460℃，保温12～14h，炉冷至300～320℃后出炉水淬至23～28℃。
优选的，所述顶部组件制备工艺包括：将含所述复合陶瓷组分的原料造粒、压制成型、干燥和烧结制得所述复合陶瓷。
优选的，所述压制成型压力为220～240MPa，保压时间为30～35s。
优选的，所述干燥温度为80℃～90℃，干燥时间为1～2h。
优选的，所述烧结温度为1300℃～1400℃、烧结真空度为1.0×1.0-2～1.0×1.0- 3Pa。
本申请所述耐热合金加入固熔元素Cr、Mo、W，使所述耐热合金具有具有多元固熔强化效应，提高了所述滑块的使用温度；加入Co，保证了所述耐热合金的高温抗蠕变强度；加入适量的Ni，提高了基体面心立方γ相的稳定性，改善了所述耐热合金析出各种有害相的倾向，使所述耐热合金氧化膜与基体的结合强度提高，提高抗氧化性能，且不会明显降低所述耐热合金的耐磨性；加入了适量的Si，有助于增加所述耐热合金的流动性并作为脱氧剂，且低所述耐热合金的韧性；加入了适量的C，可形成骨架状的碳化物和共晶碳化物，提高了所述耐热合金高温强度具有积极作用；加入了适量的Ce的加入，提高了所述耐热合金的纯净度；控制S、P的含量，避免影响所述耐热合金的高温持久性能，加入适量的Fe，保证了所述耐热合金的热传导性。
本申请所述复合陶瓷，加入适量的TiC、WO3、TiO、BO，使所述复合陶瓷具有良好的强度和韧性，提高所述复合陶瓷耐高温和耐磨性能。加入了适量Si，降低所述复合陶瓷显气孔率，提高了常温强度、高温强度，改善了热震性。
本申请与现有技术相比，其详细说明如下：
本申请底部组件材料选择经多步固熔处理耐热合金，提高了加热炉滑块耐热性，热传导性和使用寿命；
本申请顶部组件材料选择经压制成型、干燥和烧结制得复合陶瓷，提高了加热炉滑块的耐高温，耐压性；
本申请底部组件与顶部组件组合加热炉滑块的稳定性和耐冲击性能。
具体实施方式
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合具体实施例对本发明作进一步的详细说明。
实施例1～3
制备底部组件：以重量份计，控制耐热合金原料组分中S 0～0.005份、P 0～0.01份，所示耐热合金原料还包括的组分如表1所示，所述份以克计；将耐热合金原料在氮气保护电阻炉中熔炼后浇筑得到铸件，所述铸件经固熔处理得到耐热合金；所述固熔处理包括第一步固熔处理、第二步固熔处理、第三步固熔处理和第四步固熔处理；所述第一步固熔处理、所述第二步固熔处理、所述第三步固熔处理和所述第四步固熔处理均包括：升温至400～460℃，保温12～14h，炉冷至300～320℃后出炉水淬至23～28℃。
表1
实施例4～6
制备顶部组件：将含表2所示复合陶瓷组分的原料造粒；压力为220～240MPa，保压时间为30～35s压制成型；干燥温度为80℃～90℃，条件下干燥1～2h；烧结温度为1300℃～1400℃、烧结真空度为1.0×1.0-2～1.0×1.0-3Pa条件下烧结制得所述复合陶瓷，所述份以克计。
表2
实施例7
将实施例1～3得到的底部组件编号A～C和将实施例4～6得到的顶部组件部编号a～c，将底部组件，顶部组件按表3～4通过耐热螺栓连接后经喷丸处理后与加热炉的水冷管连接得到加热炉滑块，测定得到的加热炉滑块不同使用温度下的性能参数，结果见表3。
表3
表4
以上仅是本发明的优选实施方式，应当指出的是，上述优选实施方式不应视为对本发明的限制，本发明的保护范围应当以权利要求所限定的范围为准。对于本技术领域的普通技术人员来说，在不脱离本发明的精神和范围内，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。

Claims (9)

1.一种轧钢加热炉滑块的制备工艺，其特征在于，包括：制备所述滑块的底部组件和顶部组件；将所述底部组件和所述顶部组件通过耐热螺栓连接后经喷丸处理后与所述加热炉的水冷管连接；所述底部组件材料为耐热合金，所述顶部组件材料为复合陶瓷；以重量份计，所述耐热合金组分由C0.1～0.3份、Si0.2～1份、Mn1～3份、Cr25～32份、Co36～38份、Ni14～18份、W2～5份、Mo1～3份Ce0.02～0.2份、Fe20～30份、S 0～0.005份、P0～0.01份组成。
2.根据权利要求1所述的制备工艺，其特征在于，以重量份计，所述耐热合金组分中C0.1～0.15份、Si0.2～0.5份、Mn1～2份、Cr28～32份、Co36～38份、Ni 14～18份、W2～3份、Mo 1～3份、Ce0.02～0.1份、Fe20～30份。
3.根据权利要求1所述的制备工艺，其特征在于，以重量份计，所述复合陶瓷组分包括：Al2O385～95份、TiC 1～5份、WO31～5份、TiO 1～8份、BeO0.1～0.2份、Si 1～5份。
4.根据权利要求1所述的制备工艺，其特征在于，以重量份计，所述复合陶瓷组分包括：Al2O385～90份、TiC 1～5份、WO31～5份、TiO 1～8份、BeO 0.1～0.2份、Si3～5份。
5.根据权利要求1所述的制备工艺，其特征在于，所述底部组件制备工艺包括：将含所述耐热合金组分的原料在氮气保护电阻炉中熔炼后浇筑得到铸件，所述铸件经固熔处理得到所述耐热合金。
6.根据权利要求5所述的制备工艺，其特征在于，所述固熔处理包括第一步固熔处理、第二步固熔处理、第三步固熔处理和第四步固熔处理，所述第一步固熔处理、所述第二步固熔处理、所述第三步固熔处理和所述第四步固熔处理均包括：升温至400～460℃，保温12～14h，炉冷至300～320℃后出炉水淬至23～28℃。
7.根据权利要求1所述的制备工艺，其特征在于，所述顶部组件制备工艺包括：将含所述复合陶瓷组分的原料造粒、压制成型、干燥和烧结制得所述复合陶瓷。
8.根据权利要求7所述的制备工艺，其特征在于，所述压制成型压力为220～240MPa，保压时间为30～35s。
9.根据权利要求7所述的制备工艺，其特征在于，所述烧结温度为1300℃～1400℃、烧结真空度为1.0×1.0-2～1.0×1.0-3Pa。
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