(a) salt bath (liquid) nitriding, where the source of nitrogen (and also carbon) is molten salt. Also known as salt bath nitriding,Thermex Metal Treating provides the QPQ liquid nitriding service with little to no distortion to the affected part. Salt Bath Nitriding. Iron and steel are nitrided in a salt bath in a process favorable to the environment. Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. It is a thermochemical diffusion process whereby nitrogen-bearing salts generate a controlled release of nitrogen at the interface of a ferrous part. Salt bath nitriding. The process may also be used as a part of liquid Nitriding treatment. Surface cleaning. There are several different nitriding processes such as gas, plasma, and salt bath nitriding. The salt bath process itself is relatively simple. Application & materials. in diameter or 107 in. Nitriding is a surface-hardening treatment. Numerous improvements and design enhancements have occurred over the years. Salt bath nitriding. The process is carried out at 750-1050°F, making it faster than gas nitriding. The operation is simple and the processing time is faster than the … Figure 1: Typical case depths achieved by QPQ ® salt bath nitriding on three representative materials, 1018 mild steel, 4140 alloy steel, and H13 tool steel. 6). The temperature used is typical of all nitrocarburizing processes: 550–590 °C (1022–1094 °F). Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. Mission Statement. Tools and small components are often liquid-nitrided. Salt bath nitriding / liquid nitriding is a subcritical surface enhancement process holding the longest track record of success over any case hardening technology. Liquid nitriding uses a cyanide salt mixture in a bath. Providing consistent high quality products and services to our customers at competitive prices, while being in strict compliance with all environmental, safety and health regulations. In these services the nitrogen donating medium is a nitrogen-containing salt. It is mandatory that the salt-bath chemistry is checked at the commencement of each shift and that the appropriate additions of salt are made to return the bath to its operational strength. Salt Bath Basics. Moreover the salts used also donate carbon to the work piece surface making salt bath a nitrocarburizing process. Salt bath nitriding can be an economical method of nitriding providing that both the salt bath chemistry and the salt bath cleanliness are maintained. In salt bath nitriding the nitrogen donating medium is a nitrogen containing salt such as cyanide salt. In salt bath nitriding, the nitrogen-donating medium is a nitrogen-containing salt such as cyanides or cyanates. The salts used also donate carbon to the workpiece surface making salt bath a nitrocarburizing process. Salt bath nitriding. The salts used also donate carbon to the workpiece surface making salt bath a nitrocarburizing process. The steel part is dipped in a salt bath solution at a very high temperature. The client can avail from us the high grade salt bath Nitriding services. The following table lists the typical properties produced by CST’s standard Ni-Surf process. In salt bath nitriding the nitrogen donating medium is a nitrogen-containing salt such as cyanide salt. Houston Unlimited, Inc. offers a salt bath nitriding process, also referred to as liquid salt bath ferritic nitrocarburizing. Unlike nitriding methods using a salt bath, gas nitriding is a more flexible process with easier disposal of the nitriding agent. Preferably, air flows through the bath. 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