This page contains a Flash digital edition of a book.
Electric Arc Furnace Smelting


电弧炉炼钢


the higher blasting speed, the bigger the mass ejec- tion strength for the castings. Cleaning strength also is higher, and the surface roughness is bigger, so only with suitable blasting speed can the ideal cleaning efficiency and surface quality be achieved. 2. Blasting period: The period of casting blasting is


determined by many elements, including the structure of castings, surface condition, condition of blasting ma- chines and the property of abrasives, based on the surface quality. Metalcasters should blast for as little time as possible to ensure higher cleaning efficiency. 3.Condition of blasting machines: For efficient opera-


tion, aspects of the blasting equipment must be in good working order, including the head mass ejection angle, condition of shot-sand separator, and the wearing part level. The equipment should be checked and adjusted often. 4. Abrasives control: The flux of abrasives when blast-


ing can affect cleaning efficiency, besides adjusting the electric current to make the abrasive flux bigger, met- alcasters also should pay attention to the condition of the abrasives used in machine, including abrasives type, size and distribution . Metalcasters should inspect the condi- tion of abrasives regularly and frequently add reasonable new abrasives. To help casting facialities find and reduce casting


cleaning cost and reassure the factory about the abrasive quality, shot blasting process, equipment adjustment and maintenance, TAA Metal offers part or full contracts for shot blasting, polishing, cleaning, finishing, paint spray- ing, equipment maintenance including manual work etc., to help foundries reduce abrasive consumption, resolve the human resource shortage problem and reduce the cost of social security, safety, and logistics. TAA Metal is one of the world’s five largest supplier of metal abrasive. Its LCB steel shot has been developed at its advanced melting facility based on its patent tech- nology of banite steel shot and mixed abrasive to help metalcasters reduce cost and improve efficiency Unique production technologies are adopted to im-


prove its high performance: 1. Material: Electric arc furnaces are used for steel liquid smelting which ensure the LCB steel shot has the


Direct-Read Spectrometer


光谱仪


此,应经常对设备进行检查和调整。 4. 磨料的状态和流量的控制:抛丸时磨料的流量大小 影响着清理效率的高低,除了通过调整电流来加大磨料流量 外,还应关注机器内使用中的磨料的状况,包括:磨料类 型的搭配、磨料的粒度大小和分布,因此应定期检查磨料状 态,并制定合理的新磨料添加频率。 5. 为了帮助铸造厂锁定并降低铸件清理成本,并消除 厂家对磨料质量、抛丸工艺、设备调整和维护等方面的顾 虑,我们可对铸造厂的抛丸、打磨、清砂、精整、喷漆、设 备维护包括人工等实行部分或全部工序承包,有利于帮助铸 造企业降低磨料消耗,解决劳务人力资源匮乏问题,降低社 保、安全、后勤成本。目前我们已为国内许多知名铸造厂提 供此项服务,受到一致认可和好评。


在竞争日益激烈的市场环境下,铸造企业也在关注每一 个生产环节的成本降低,我们在关注原材料、造型、成品率 等大宗物资和关键环节的同时,更要多关注铸件清理这一 环节的控制,选用高性能的磨料无疑是铸件清理降本增效最 便捷的方法,大多铸造企业也在磨料供应商的选择上从单纯 的比较价格上,转变为更关注磨料的性价比、技术支持能力 等,这一转变无论对铸件清理的应用技术,还是对金属磨料 行业的技术提升都会有所促进,从而更好地帮助铸造企业真 正做到降本增效!


低贝混合磨料是我们经过多年的应用实践积累,依托我 们先进的冶炼装备,


结合我们“贝氏体钢丸”、“清理铸件专用混合磨料” 等多项专利产品和技术研发而成。


在生产过程中,我们采用了多项独特的技术工艺来提高 磨料的性能:


1、材质:我们采用电弧炉炼钢,利用电弧炉可调节成分 的特性,通过脱碳、脱硫、脱磷以及增加铁合金使其具备优 质低碳合金钢的材质,并通过造渣——除渣来净化钢水,减 少钢水内杂质含量,从而使磨料获得最佳的材质。 2、外形:根据钢丸、钢砂的生产工艺,决定了其会含有 少量的缺陷颗粒,例如钢丸中的空心、裂纹,钢砂中的裂 纹、片状颗粒等,这些缺陷都是造成磨料消耗过大的直接因 素。我们采用了高速离心成形,加上我们在浇铸时对成形工 艺、冷却速度的把握,使形成的钢丸颗粒大幅降低了缺陷的 比例,同时形成了贝氏体的金相组织,避免了钢丸在使用过 程中产生破碎现象。


78 | FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION September 2014


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82