CN115255357A - 一种用于激光复合制造锌锅轴套的粉末材料及其制造方法 - Google Patents
一种用于激光复合制造锌锅轴套的粉末材料及其制造方法 Download PDFInfo
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- 229910052719 titanium Inorganic materials 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明专利属于激光熔覆技术领域,具体涉及一种用于激光复合制造锌锅轴套的粉末材料及其制造方法。本发明提供一种用于激光复合制造锌锅轴套的粉末材料,所述材料组分包括TiB2粉末和钴基合金粉末,所述的钴基合金成份按质量百分比计:C:0.5%~0.9%,Cr:19.00%~23.75%,Si:0.50%~0.8%,W:6.65%~9.50%,Fe:2.00%~3.00%,Mo:1.50%~3.00%,Al:0.50%~0.9%,B:0.50%~1.50%,Ti:0.5‑1.0,Co余量。本发明提高轴套的防腐性与耐磨性,保证产品质量,延长辊套使用寿命。
Description
技术领域
本发明专利属于激光熔覆技术领域,具体涉及一种用于激光复合制造锌锅轴套的粉末材料及其制造方法。
背景技术
热镀锌也称热浸镀锌,是钢板、带自退火炉出来后,进入高温熔融的液态金属的锌锅中,经由锌锅辊系(一般包括沉没辊、矫正辊和稳定辊)获得金属覆盖层的一种方法。根据镀层的种类不同,锌锅内液态金属的成分和工作温度也不同,一般在440-460℃范围。通常,沉没辊实现带钢的转向,因此辊径较大;矫正辊在实际生产中,可以前后移动,以实现带钢的张紧功能,防止带钢和辊系打滑;稳定辊的位置通常固定,起到固定带钢上行通板轨迹线的目的。沉没辊,矫正辊和稳定辊整体浸入到锌锅中,这些辊子的两端均安装在辊架上,辊架是悬臂梁结构。辊子在辊架的安装通过滑动轴承付来实现,滑动轴承的摩擦副,内圈称为轴套,外圈称为轴瓦,依靠两者之间的滑动摩擦实现辊体转动。由于锌锅辊系整体浸入到锌锅中,在腐蚀、磨损、高温和高机械力等的同时作用下,随着工作时间的增加造成轴套轴瓦失配,辊系出现大幅度抖动,进而影响产品质量。沉没辊系统在线寿命短是影响热镀锌在线使用寿命的主要因素,而轴套、衬瓦的快速磨损失效是制约热镀锌在周期提高的关键因素,严重影响了企业的生产效率与效益。因此,液态金属锌锅用的轴套轴瓦须具备高的耐磨损,耐腐蚀性等。
现有技术的轴套的材料选型和结构设计,有单一结构的,如不锈钢316L、钴基合金系列,如司太立合金等、也有复合结构,如不锈钢316L上通过热喷涂的方法来提供轴套的耐磨性,还有整体结构的,例如申请号CN202010129801.3的中国发明专利,采用碳化钛硬质合金材质通过粉末冶金烧结工艺烧制成形的锌锅辊用整体轴套等,上述技术在工业实践中,由于存在残余应力导致在腐蚀过程中有裂纹产生,存在使用寿命短或者成本高的不足。
因此,亟需提供一种激光复合制造的锌锅轴套,提高锌锅轴套使用寿命,解决轴套不耐高温锌液腐蚀及磨损的问题。
发明内容
本发明的目的在于提供一种激光复合制造锌锅轴套的合金材料,并用激光熔覆的方法制备在轴套的工作面上。本发明目的在于解决现有技术存在的上述问题,提高轴套的防腐性与耐磨性,保证产品质量,延长辊套使用寿命。
为了实现上述目的,本发明采用了如下技术方案
一种用于激光复合制造锌锅轴套的粉末材料,所述材料组分包括TiB2粉末和钴基合金粉末,所述的钴基合金成份按质量百分比计:C:0.5%~0.9%,Cr:19.00%~23.75%,Si:0.50%~0.8%,W:6.65%~9.50%,Fe:2.00%~3.00%,Mo:1.50%~3.00%,Al:0.50%~0.9%,B:0.50%~1.50%,Ti:0.5-1.0,Co余量。
进一步的,所述粉料按重量百分比计TiB2粉末为20-30%,钴基合金粉末为70-80%。
一种用于激光复合制造锌锅轴套的粉末材料的制备方法,包括以下具体步骤:
(1)轴套表面清洁:去除待熔覆表面的油污,氧化物,疲劳层等影响熔覆质量的因素;
(2)将清洁后的轴套放入加热炉加热200-300℃;
(3)按照比例称量合理的各组分用于激光复合制造锌锅轴套的粉末备用;
(4)待加热至所需温度后用半导体光纤输出激光器采用合金粉末材料同步送粉的方式进行激光熔覆;
(5)将熔覆完的轴套探伤,进行消除残余应力处理;
(6)成品进行加工,保留激光熔覆层厚度0.5-0.7mm。
进一步的,步骤4)中激光熔覆工艺参数为:功率:2000~3000W,光斑直径:3~4mm,焦距300~400mm,扫描速度:1200-1500mm/min,单层熔覆厚度:0.8-1.0mm,搭接率:40%~60%,保护气氛:氩气。
进一步的,所述粉末按质量百分比计:C:0.5%~0.9%,Cr:19.00%~23.75%,Si:0.50%~0.8%,W:6.65%~9.50%,Fe:2.00%~3.00%,Mo:1.50%~3.00%,Al:0.50%~0.9%,B:0.50%~1.50%,Ti:0.5-1.0,Co余量;所述粉料按重量百分比计TiB2粉末为20-30%,钴基合金粉末为70-80%,TiB2粉末粒度范围为-800目至+325目;钴基合金粉末粒度范围为为-100目至+270目。
进一步的,步骤5)中消除残余应力处理方法为回火热处理500℃保温2小时缓冷。
与现有技术相比,本发明的有益效果在于。
(1)采用合适的激光熔覆工艺,使熔覆后的合金层稀释率控制在小于10%,从而保证熔覆层的使用效果。
(2)本发明中加入TiB2粉末,在熔覆过程中,TIB2经激光工艺后溶解析出小颗粒状额硬质相能够很好的润湿于钴基基体中并均匀分布在其中,形成第二相强化相,一方面能够充当耐磨支撑相,提高耐磨性能;另一方面均匀分布TiB2耐熔融锌液腐蚀,进一步增大原先laves相耐腐蚀区域,进一步提高耐锌腐蚀性能;同时还能强化基体硬度,硬度能够提高2-3HRC。Ti的加入有利于TiB2在钴基基体中的均匀分布,当添加Ti含量过量时,会加剧TiB2硬质相的聚集,恶化钴基基体强韧性能。
(3)合金中加入一定量的Al、Ti可以在服役过程中生成致密的Al2O3、TiO2等致密的氧化膜,该氧化膜化学惰性高,可以有效阻止锌液对金属的腐蚀;同时形成的Al2O3、TiO2具有优异的耐磨性能,能够减少锌渣对于轴套的磨粒磨损。有脱氧元素Ti,能够降低熔覆层内的氧含量,减少钴基合金熔覆易产生气孔的问题,能够减少熔融Zn扩散通道,从而增加轴套的使用寿命。
(4)由于加入了一比例的Ni元素进一步提高了塑性,适当增加合金层内的B含量,能够形成Fe-B相,提高耐冲蚀性能;适当增加Si的含量,提高熔覆层在450℃下的抗氧化性能。但过多的B,Si含量会使熔覆层的脆性增加,不利于激光的快冷熔覆。
(5)通过回火热处理法消除残余应力,延长使用寿命短及降低生产成本。
具体实施方式
实施例1。
用上述工艺激光复合制造模拟轴套件,对比耐熔融锌蚀性能。
(1)轴套表面清洁,去除待熔覆表面的油污,氧化物,疲劳层等影响熔覆质量的因素;将清洁后的轴套放入加热炉加热至200℃。
(2)待加热至所需温度后用半导体光纤输出激光器采用合金粉末材料同步送粉的方式进行激光熔覆。合金材料成份为:20%TiB2粉末,80%钴基合金粉末;
合金成份按质量百分比计:C:0.5%,Cr:20%,Si:0.6%,W:7.0%,Fe:2.5%,Mo:2.8%,Al:0.5%,B:1.0%,Ti:0.9,Co余量。
TiB2粒度范围为-800目至+325目;钴基合金粉末为-100目至+270目;
熔覆工艺为:功率:2800W,光斑直径:3mm,焦距400mm,扫描速度:1200mm/min,单层熔覆厚度:0.8mm,搭接率:50%。
(3)将熔覆完的轴套进行着色探伤,进行去应力热处理,消除残余应力。
(4)热处理后进行成品加工,保留激光熔覆层厚度0.5mm。
将制得模拟轴套试验件与316L,WC-12Co喷涂工艺样件同等耐锌蚀实验条件下,进行7天、15天、30天试验,轴套失重量均优于其他两种,整个试验过程中未产生裂纹,能够减缓熔融锌的进一步腐蚀,耐锌蚀能力优异。
实施例2。
用上述工艺激光复合制造模拟轴套件,对比耐熔融锌蚀性能。
(1)轴套表面清洁,去除待熔覆表面的油污,氧化物,疲劳层等影响熔覆质量的因素;将清洁后的轴套放入加热炉加热至200℃。
(2)待加热至所需温度后用半导体光纤输出激光器采用合金粉末材料同步送粉的方式进行激光熔覆。合金材料成份为:20%TiB2粉末,80%钴基合金粉末;
合金成份按质量百分比计:C:0.9%,Cr:22%,Si:0.8%,W:8.0%,Fe:2.5%,Mo:1.8%,Al:0.9%,B:1.2%,Ti:0.5,Co余量。
TiB2粒度范围为-800目至+325目;钴基合金粉末为-100目至+270目;
熔覆工艺为:功率:2800W,光斑直径:3mm,焦距400mm,扫描速度:1500mm/min,单层熔覆厚度:1.0mm,搭接率:50%。
(3)将熔覆完的轴套进行着色探伤,进行去应力处理,消除残余应力。
(4)热处理后进行成品加工,保留激光熔覆层厚度0.7mm。
将制得模拟轴套试验件与316L,WC-12Co喷涂工艺样件同等耐锌蚀实验条件下,进行7天、15天、30天试验,轴套失重量均优于其他两种,整个试验过程中未产生裂纹,能够减缓熔融锌的进一步腐蚀,耐锌蚀能力优异。
Claims (6)
1.一种用于激光复合制造锌锅轴套的粉末材料,其特征在于,所述材料组分包括TiB2粉末和钴基合金粉末,所述的钴基合金成份按质量百分比计:C:0.5%~0.9%,Cr:19.00%~23.75%,Si:0.50%~0.8%,W:6.65%~9.50%,Fe:2.00%~3.00%,Mo:1.50%~3.00%,Al:0.50%~0.9%,B:0.50%~1.50%,Ti:0.5-1.0,Co余量。
2.根据权利要求1所述的一种一种用于激光复合制造锌锅轴套的粉末材料,其特征在于,所述粉料按重量百分比计TiB2粉末为20-30%,钴基合金粉末为70-80%。
3.一种用于激光复合制造锌锅轴套的粉末材料的制备方法,其特征在于,包括以下具体步骤:
(1)轴套表面清洁:去除待熔覆表面的油污,氧化物,疲劳层;
(2)将清洁后的轴套放入加热炉加热200-300℃;
(3)按照比例称量合理的各组分用于激光复合制造锌锅轴套的粉末备用;
(4)待加热至所需温度后用半导体光纤输出激光器采用合金粉末材料同步送粉的方式进行激光熔覆;
(5)将熔覆完的轴套探伤,进行消除残余应力处理;
(6)成品进行加工,保留激光熔覆层厚度0.5-0.7mm。
4.根据权利要3所述的一种用于激光复合制造锌锅轴套的粉末材料的制备方法,其特征在于,步骤3)中所述粉末,其中TiB2粒度范围为-800目至+325目;钴基合金粉末为-100目至+270目。
5.根据权利要求3所述的一种用于激光复合制造锌锅轴套的粉末材料的制备方法,其特征在于,步骤4)中激光熔覆工艺参数为:功率:2000~3000W,光斑直径:3~4mm,焦距300~400mm,扫描速度:1200-1500mm/min,单层熔覆厚度:0.8-1.0mm,搭接率:40%~60%,保护气氛:氩气。
6.根据权利要3所述的一种用于激光复合制造锌锅轴套的粉末材料的制备方法,其特征在于,步骤5)中消除残余应力处理方法为回火热处理。
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