TPT March 2011

的零部件，单件或批量达到2公吨。根据尺寸大小，部件通常在油里或熔盐里淬火来最小化变形，硬化深度 在0.15 和4mm+之间。密封淬火炉处理也在保护环境下可用于尺寸485毫米 x 355毫米以及最大重量达250 千克较小零部件的热处理。 感应淬火包含使用高频电场对零部件进行更快的加热和淬火，可用于局部表面硬化，无需加热整个产品。该 方法通常用于硬化1.5米长的轴与销，处理直径达4米的内孔和钻孔以及单个齿轮齿或整个齿轮的轮廓硬化。 软氮化处理，或盐基铁素体氮碳共渗是一个比较低温、低失真盐浴过程，适用于大多数黑色金属，而且通过 增加疲劳强度、耐磨损、抗腐蚀，最大化硬度以及普遍增强外观来提高零部件质量。通过接下来的氧化处理 以及促进黑色氧化表面处理，防腐性能能够进一步提高，同时淬火、抛光、淬火（QPQ）过程使有光泽的黑 色涂层具有高耐蚀性。 奥氏体等温淬火是一个较不不寻常的淬火过程，用于铁合金、钢和铸铁，包括ADI（奥氏体等温淬火球墨铸 铁），在这里，材料在熔盐浴里以硬化温度淬火，可以产生更大的耐久性，增加耐磨性以及更高的冲击和疲 劳强度。能处理最大400千克的负载，零部件尺寸为715毫米直径 x 1320毫米深度，该过程能提供低失真和 预期稳定性，使部件能铸造成接近成品的形状，以及最小化后续加工。 马氏体等温淬火是另一种等温过程，涉及熔盐浴，可以同时有效地执行硬化和回火，保持最低限度的变形。 用来实现最常在市场上销售的钢材硬度、强度和韧度的最优结合的普通硬化和回火过程是在Keighley Labs的 均热炉和密封淬火炉里完成的，可处理的零部件长度达1.71米，淬火剂可以根据客户规程来选用。其他热处 理工艺包括为接下来的加工降低材料硬度的退火，精炼用于进一步加工的现有颗粒大小和创造一个更均匀的 结构的正火，以及去除由先前制造过程产生的残留应力的应力释放。 Keighley Laboratories为所有热处理工艺提供证明书，UKAS认可的冶金检查选择，以及内部测试设备；金相 试件和记录至少应存档6年，确保为广大客户提供可追溯性。由Keith Blower的技术总监支持的热处理团队能 进行故障模式及影响分析(FMEA)研究，用来识别和消除潜在的零部件可靠性问题，而且能够协助金属材料、 热处理工艺和测试的规程形成。 New brochure highlights expanded product range SAINT-GOBAIN PAM UK, a supplier of ductile iron pipes, fittings, valves, and cast iron above and below ground drainage systems, has produced an updated brochure highlighting its Ensign Eezi-Fit push-fit range of above ground drainage systems. The 2010/11 brochure features the 150mm range which was launched in 2010 to complement the 100mm products. This has enabled the company to offer products to cater for virtually all soil stacks, of which the majority in the UK are either 100mm or 150mm in diameter. The brochure also contains an extensive techni- cal section giving detailed installation advice. Since its launch in late 2007, Ensign Eezi-Fit has been specified for a variety of high-profile projects based on its ability to combine the advantages of cast iron – appearance, durability, strength, sustainability, fire resist- ance and acoustic performance – with rapid installation. This was highlighted in a recent study carried out at the Building Research Establishment (BRE) where, under strictly monitored conditions, Ensign Eezi-Fit was shown to be faster to install for vertical soil risers than HDPE using fusion welded joints. The company states that Ensign is the only cast iron system kitemarked to BS EN 877. Ensign Eezi-Fit is also kitemarked to the standard for gravity applications of 0.5 bar performance, although it has been successfully tested to higher pressures. Mike Rawlings, marketing manager – soil & drain at Saint-Gobain PAM UK, commented, “We have continued to develop and expand the Ensign Eezi-Fit range and the latest brochure brings together all the latest innova- tions with simple step-by-step guides on cutting, jointing and fitting.” Новая брошюра с расширенным сортаментом продукции Компания Saint-Gobain PAM UK, поставщик труб, фитингов, трубопроводной арматуры из чугуна с шаровидным графитом и подземных и надземных дренажных систем из чугуна, выпустила новую Keighley Laboratories Ltd – UK Fax: +44 1535 680604 Email: info@keighleylabs.co.uk Website: www.keighleylabs.co.uk - - - - - - - - - - - - - - - - - - -