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目前盛行的各种气体软氧化法都有渗碳性气体(CO)和氨气(NH_3)在炉内都会产生氰酸气体。如果炉子密封不好或废气燃烧不完全,带有氰根的气体就会外泄,污染环境和损害健康。因此氰根的存在是影响这一工艺发展的最大障碍。为此,需要寻找一种既能消除氰根污染,又能保证软氮化层耐磨性好、疲劳强度高的方法,而加氧氮化法基本上达到了上述要求。一、生产设备及工艺我厂现有软氮化炉两台。一台为25千瓦井式电炉,炉膛尺寸为φ450×560毫米;另一台为135千瓦并式电炉,炉膛尺寸为φ1100×2700毫来。风
At present, all kinds of soft gas oxidation methods have carburizing gas (CO) and ammonia (NH3) in the furnace will produce cyanate gas. If the furnace is not properly sealed or the exhaust gas is not completely combusted, the cyanide-laden gas leaks out, polluting the environment and impairing health. Therefore, the existence of cyanide is the biggest obstacle to the development of this process. Therefore, it is necessary to find a way to eliminate both cyanide pollution, but also to ensure that the soft nitrided layer wear resistance, high fatigue strength, and the method of oxygen and nitrogen basically meet the above requirements. First, the production equipment and technology I plant two existing soft nitriding furnace. One for the 25 kilowatts pit furnace, the furnace size is φ450 × 560 mm; the other is 135 kilowatts and electric furnace, the furnace size is φ1100 × 2700 milli. wind