added carbon and superfluous tungsten may generate WC，W2C，M6C and other carbides. The hard materials distribute in the cobalt base and strengthen the separation process, thus the alloy can maintain excellent intension and rigidity under high temperature of 800℃. Thus, the cobalt, chrome, tungsten and carbon alloy have integrated performance of preventing the high temperature wear, oxidation and thermal fatigue. 　　鈷在417℃溫度以下，為密排六方結(jié)構(gòu)，具有低的摩擦系數(shù)，而具有很好的耐磨性。在417℃溫度時發(fā)生由密排六方晶體，向面心立方晶體的轉(zhuǎn)變，而產(chǎn)生體積應(yīng)力。因此在噴焊時一般均需將被焊工件預(yù)熱到500℃～600℃，以防鈷基焊層開裂。 　　Below 417℃,cobalt is in dense-hexagonal structure,it has lower frictional coefficient and sound wear resistance. The structure of cobalt will change from dense-hexagonal crystal into face-center-cubic structure under 417℃. The volume stress may appear. Therefore, the welding pieces should be warmed up to 500℃～600℃ to avoid the crack for cobalt-base welding layers. 　　我公司生產(chǎn)的鈷基合金粉，既有適合等離子堆焊的、激光熔敷的，也有適合氧乙炔焰噴焊的，下面介紹的鈷基噴焊合金粉，采用塑料桶和鐵桶封裝，但由于粉末顆粒較細(xì)，極易吸潮，建議用戶在使用前經(jīng)120℃保溫兩小時烘干后使用為佳。 　　Our company has different types of cobalt-base alloy powder, which can meet the requirements of laser cladding for plasma surfacing and oxyacetylene flame welding. The following cobalt-base sprayed welding alloy powder produced by our company is packaged and sealed in the plastic or metal pail. However, for the thin granularity and humidity-absorbing characteristic of the product, it’s recommended that the customer should dry the products under 120℃ for two hours before useing.型號 相當(dāng)于 規(guī)格(μm) 特性簡述 主要用途 物理性能 應(yīng)用工藝 Co1 Stellite1 -150/ 53 -200/ 73 -73/ 45 合金中碳和鎢含量高，抗磨粒磨損性能極優(yōu)，具有耐熱，耐蝕高紅硬性等優(yōu)良性能，但沖擊強(qiáng)度差，開裂傾向敏感。 應(yīng)用于耐磨料磨損及固狀料沖刷磨損場合。螺旋推進(jìn)器,泵閥座等。 ①HRC50-57②熔點1265℃③流動性17s/50g④松裝密度4.7g/cm3 等離子堆焊 Co2 Stellite6 -150/ 53 -200/ 90 -75/ 25 在Srellire合金系列中應(yīng)用為廣泛一種。韌性較好，在800℃以下溫度范圍內(nèi)具有優(yōu)良的耐蝕、耐高溫、抗沖擊等綜合性。 氣門進(jìn)排氣閥、閥座、閘板閥閥板。 ①HRC38-42 ②熔點1280℃ ③流動性18s/50g ④松裝密度4.7g/cm3 等離子堆焊 Co2F Stellite6 -106/ 45-200/ 90 為適用氧乙炔焊加入B、Si元素的Stelllite6改型的粉末，其性能與上述相同。 氣門、閥門、閥座等密封面堆焊。 ①HRC40-44②熔點1180℃③流動性16s/50g④松裝密度4.7g/cm3 等離子堆焊氧乙炔噴焊 Co3 Stellite12 -150/ 53-200/ 90 該合金含鎢高，故基體硬度高，耐磨料磨損性能較強(qiáng)，在800℃高溫下焊層仍具有良好的耐蝕、耐磨、耐熱性能。 閥門密封面，紙張塑料等刀刃口的預(yù)保護(hù)，排氣閥。 ①HRC47-50 ②熔點1300℃ ③流動性18s/50g ④松裝密度4.7g/cm3 等離子堆