【正文】 ors. 77 Other benefits include: ? No Hydrogen Embrittlement No base metal hydrogen embrittlement problems. ? No Post Heat Treatment No post heattreatment or stress relief required. ? No Fatigue Debit Chrome plating reduces the fatigue life of parts it is applied to, whereas, some thermal spray coatings can increase it. ? Finish With Conventional Grinding Thermal spray coatings can be finished with conventional grinding and polishing technologies, some can even be single point machined. ? Process Time The decreased number of process steps, and high application rate can dramatically reduce turnaround time, which is increasingly a factor in repair applications. 78 Performance parison between Chrome Plate and various thermal spray coatings 79 Limitations of Thermal Spraying ? Line of Sight Process Some capability to coat inside diameters, and difficult geometry can mean significant automation programming. ? Noise Thermal spray processes vary in their sound output, some are as high as 135dB, this requires noise attenuation. ? Dust All of the thermal spray processes produce dust particles as waste or overspray which needs to be collected by dust collection for disposal, and also as a means of keeping the spray area clean. ? Process Parameters A thorough understanding of the thermal spray process is required to produce the optimum results. As with any technology, there is an associated learning curve. 80 Thermal Spraying vs. Hard Chrome Plating Overview ? Capital Cost The relative capital expenditure for establishing facilities with the same production capability is much greater for chrome plating than thermal spraying. ? Space A thermal spray facility requires significantly less floor space than an equivalent plating facility. ? Energy Cost For plating, approximately 15 watts of energy are required per square inch. As part size increases, so do the energy costs. For thermal spraying, part size affects coating application time, and depending on the process used, energy costs are similar. ? Waste Disposal Disposing of effluents from the plating process is being more and more costly. State and Federal regulations on pollution control require that each facility make substantial investments to adequately provide for waste treatment. Thermal spraying produces hazardous waste in the form of metallic dust, whose disposal is relatively easy. ? Materials Diversity A chromium plating facility is a total mitment to one coating, whereas a thermal spray facility provides the capability of producing a broad range of coatings. 81 82 Some Examples From Industry 83 噴涂層的性能測(cè)試與質(zhì)量檢驗(yàn) 工藝性能： 物理性能： 化學(xué)性能： 84 第五節(jié) 電火花表面涂敷 電火花表面涂敷 85 電火花表面涂敷的原理 10Hz~1000Hz10s~5s 100s~6s8000 ~25000 86 機(jī)械零件電火花表面強(qiáng)化的應(yīng)用實(shí)例 87 第六節(jié) 熔結(jié) 一、 熔結(jié) 二、 兩種方法： 88 第七節(jié) 熱浸鍍 一、 熱浸鍍 鋅（熔點(diǎn) ℃ ）、鋁（熔點(diǎn)℃ ）、錫（ ℃ ）、鉛（熔點(diǎn) ℃ ） 89 二、 熱浸鍍工藝 → → 90 三、 熱浸鍍鋅 熱浸鍍鋅原理 ZnO Zn(OH)2 ZnCO3ZnO3?Zn(OH) ( ) 91 熱浸鍍鋅鋼材的性能與用 92 四、 熱浸鍍鋁 特點(diǎn) 660 性能和應(yīng)用 500 93 第八節(jié) 搪瓷涂 敷 一、概念 搪瓷： 瓷釉 釉漿 94 二、 瓷釉得基本成分－玻璃料 RO2 SiO2, TiO2, ZrO2 R2O3 B2O3, Al2O3 RO BaO, CaO, ZnO R2O Na2O, K2O, LiO 95 第九節(jié) 陶瓷涂層 陶瓷涂層 陶瓷涂層工藝方法 Detonation spraying CVD 300 96 第十節(jié) 塑料涂敷（又稱涂塑或噴塑） 一、 塑料粉末分類 熱固性粉末－不能再重熔 熱塑性粉末－可以重熔 97 二、 塑料粉末涂敷方法 1 30kV~90kV 流動(dòng)浸塑法 其它涂敷方法。 98 三、 塑料涂敷的優(yōu)點(diǎn)及前景 優(yōu)點(diǎn) 100%。 缺點(diǎn) 9 2023/4/22023/4/2Sunday, April 2, 2023 10 2023/4/22023/4/22023/4/24/2/2023 3:06:17 AM 11 2023/4/22023/4/22023/4/2Apr232Apr23 12 2023/4/22023/4/22023/4/2Sunday, April 2, 2023 13 2023/4/22023/4/22023/4/22023/4/24/2/2023 14 2023 4 2 2023/4/22023/4/22023/4/2 15 2023 4 2023/4/22023/4/22023/4/24/2/2023 16 2023/4/22023/4/2April 2, 2023 17 2023/4/22023/4/22023/4/22023/4/2 9 2023/4/22023/4/2Sunday, April 2, 2023 10 2023/4/22023/4/22023/4/24/2/2023 3:06:17 AM 11 2023/4/22023/4/22023/4/2Apr232Apr23 12 2023/4/22023/4/22023/4/2Sunday, April 2, 2023 13 2023/4/22023/4/22023/4/22023/4/24/2/2023 14 2023 4 2 2023/4/22023/4/22023/4/2 15 2023 4 2023/4/22023/4/22023/4/24/2/2023 16 2023/4/22023/4/2April 2, 2023 17 2023/4/22023/4/22023/4/22023/4/2 9 2023/4/22023/4/2Sunday, April 2, 2023 10 2023/4/22023/4/22023/4/24/2/2023 3:06:17 AM 11 2023/4/22023/4/22023/4/2Apr232Apr23 12 2023/4/22023/4/22023/4/2Sunday, April 2, 2023 13 2023/4/22023/4/22023/4/22023/4/24/2/2023 14 2023 4 2 2023/4/22023/4/22023/4/2 15 2023 4 2023/4/22023/4/22023/4/24/2/2023 16 2023/4/22023/4/2April 2, 2023 17 2023/4/22023/4/22023/4/22023/4/2 MOMODA POWERPOINT Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce id urna blandit, eleifend nulla ac, fringilla purus. Nulla iaculis tempor felis ut cursus.