带氧化工序的气体氮碳共渗工艺,介绍如下,能耐盐雾试验240小时。请熟悉的朋友作进一步介绍。我们用QPQ处理达到了要求,没有使用美国的专利和Bodycote的专利。
PROCESSSEQUENCE Gaseousnitrocarburising followedby oxidation The basic heat treatmentprocess sequence is as follows. ALKALINE CLEANING LOADING PRE-HEATING ANDPURGING (3 hours to temperature) NITROCARBURISING (3– 5 hours at 570 ±10°C) PLASMA ACTIVATION(30 minutes at 520 ±10°C) OXIDATION (1 hourat 480-500°C) FURNACE COOL TO200°C (depending on batch size) UNLOADING Polish if necessary Some variations on the aboveprocess may be permissible depending on the component geometry and function. After treatment components shall be capable of meeting 240 hours withoutshowing red corrosion when salt spray tested to ASTM B117 or DIN 50021 SS.
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