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TA的每日心情 | 开心 2013-6-27 11:19 |
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签到天数: 1 天 [LV.1]初来乍到
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朋友剛剛進了一些S90V的鋼條,準備要作熱處理,想要請教一下有經驗的前輩,要怎樣作熱處理會比較好!
下面是該公司的數據原文:我翻譯了一下,請指正!
Hardening:
Austenitize: 2100-2150°F (1150-1175°C) Hold time at temperature: 10-30 minutes
沃斯田鐵化:首先加熱至1150-1175°C,維持10-30分鐘。
Quench: Salt quench, interrupted oil quench, positive pressure gas quench or air cool at a minimum cooling rate of 150°F/min (80°C)/min) to below 1000°F (540°C) followed by still air or moderately forced air cooling to below 125°F (50°C). For optimum vacuum heat treatment response, a minimum 4 bar gas quench is recommended.
淬火:可以直接在鹽水、分級油淬。如果是要用氣冷,要用正氣壓空氣(比較強的風)或是直接在空氣中冷卻,但要注意的是,空氣冷卻的速率要達到(80°C)/min,以這個速率一直降溫到540°C,然後再用穩定或比較溫和的風,一直冷卻到50°C。如果是用真空爐熱處理,為了得到最佳的效果,推薦最小真空度4bar。
Temper: For an optimum combination of hardness, wear resistance and corrosion resistance, double temper at 400-750°F (200-400°C). Hold for a minimum of 2 hours each temper. For optimum stress relieving and dimensional stability, S90V may be double tempered at 1000-1025°F (540-550°C), but tempering above 800°F (425°C) may result in some loss of corrosion resistance. A freezing treatment may be employed between the first and second tempers, if desired. Freezing treatments should always be followed by at least one temper.
PLEASE NOTE: Tempering between about 800 and 1000°F (425 and 540°C) is not recommended. All martensitic stainless steels suffer from embrittlement when tempered in this range.
回火:如果是要在硬度、耐磨耗度、耐蝕性三者中取得最佳的平衡,必須在200-400°C作2次回火,每次回火至少2小時。如果要得到最佳的應力釋放與尺寸穩定度,可以在540-550°C間作2次回火,但是在425°C以上作回火可能會降低對抗鏽蝕的抵抗力。如果需要的話,在第一次與第二次回火之間,可以作深冷處理(浸液態氮)。深冷處理必須是在回火之後進行。
請注意:不建議在425 - 540°C之間作回火。所有麻田散鐵系不銹鋼在此溫度區間作回火可能會導致脆化。
Aim Hardness: HRC 56-59
目標硬度:HRC 56-59
[ 本帖最后由 chungming 于 2008-9-12 21:17 编辑 ] |
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