JBT 6048-1992 Salt bath heat treatment热处理盐浴

QJ / Z 124 Wrought aluminum alloy heat treatment 3、 Terms 3.1 neutral salt baths Neutral salt (e.g., alkali metal salts and alkaline earth metal chloride, an alkali metal carbonate salt or mixtures) after heating a liquid medium formed by melting. 3.2 nitrate bath Nitrate, nitrite or mixtures after heating a liquid medium formed by melting 3.3 high-temperature salt bath Above 950 ℃ bath use. 3.4 medium temperature salt baths The salt bath temperature between 650℃ and 950℃ 3.5 Low Temperature salt baths Below 650 ℃ used 3.6 Salt baths adjustment By Salt baths correction, clean and adding a new salt slag or other operations that meet the technical requirements of the salt bath with performance. 3.7 Salt baths correction Correction solvent was added into the salt bath to remove the oxide, the operation of prevent or reduce oxidation of the part, decarburization.
JBT 6048-1992 Salt bath heat treaΒιβλιοθήκη Baidument
1、 Subject Matter and Scope This standard specifies the salt bath heat treating equipment requirements, bath requirements, process operation and safety, and environmental protection. This standard applies to metal parts for heating and cooling in a neutral salt bath or nitrate bath. 2、Reference Standard GB 223.1 Analysis of the carbon content in Steel and Alloys GB 1298 Carbon tool steel Technical conditions
JB 3814 Normalizing and annealing processing for steel JB 3877 Quenched and tempered processing for steel JB 4390 Salt bath calibrator for high temperature and medium temperature heat treatment JB 4406 General requirements of safety technology during heat treatment JB 5266 Indirect resistance furnaces furnace JB / T 5093 Limit of Harmful substances in the gas of Heat treatment shop ZB J36 007 Heat treatment salt ZB J71 001 General provisions of controlling hazardous solid waste pollution of salt bath heat treatment Part 12 RY series electric bath
3.8 Foil decarburization rate The ratio of the difference between original carbon content of the sample and residual carbon content and original carbon content of the sample 4 、Commonly used metal materials Carbon tool steel, alloy tool steel, high speed tool steel, high-quality carbon steel, alloy structural steel, spring steel, chromium bearing steel, Martensite stainless steel, deformation aluminum and so on. Technical condition of the material should comply with the relevant standards. 5、 Equipment 5.1 Salt bath furnace 5.1.1 According to the conditions， salt bath furnace heated by electric or fuel. 5.1.2 Electrical heating salt bath furnace shall comply with the relevant provisions of JB 5266. 5.1.3 Salt bath furnace heating zone effective insulation accuracy should meet the technical requirements, generally should not exceed ± 15 ℃ (for steel heating) or ± 5 ℃ (suitable for heating deformation of aluminum alloy). 5.1.4 Bipolar silver electrodes salt bath furnace, recommended the use of embedded electrode structure, melting