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在钢丝热处理工艺中,氧化铁皮影响产品质量。多年来沿用的钢丝在马弗炉内加热、然后在酸洗车间去除氧化铁皮的工艺过程缺点很多。国外从50年代末期提出敞焰无氧化加热原理,到60年代末已在许多国家推广使用。近年来国内也开始研究使用。由金属和炉气的化学反应可知:要防止钢的氧化,在炉气中不允许有氧存在,而且必须增加炉气中还原性气体CO和H_2的含量,即控制不同温度下的平衡常数(温度为950℃时K_1=(P_(CO’))/(P_(CO’_2))=2.38;K_2=(P_(H’_2))/(P_(H’_2O))=1.6)。如以天然气为燃料时,采用空
In the wire heat treatment process, the scale affects the product quality. Over the years the use of steel wire in the muffle furnace heating, and then remove the scale in the pickling process has many shortcomings. Abroad from the late 50’s proposed open-flame non-oxidation heating principle, to the late 1960s has been promoted in many countries. In recent years, China has also begun to study the use of. From the chemical reaction between metal and furnace gas, it can be seen that to prevent the oxidation of steel, the presence of oxygen in the furnace gas is not allowed, and the content of reducing gases CO and H_2 in the furnace gas must be increased, ie, the equilibrium constant under different temperatures K_1 = (P_ (CO ’)) / (P_ (CO’_2)) = 2.38; K_2 = (P_ (H’_2)) / (P_ (H’_2O)) = 1.6 at a temperature of 950 ° C. If using natural gas as fuel, adopt empty