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12Cr1MoVG高压合金管热变形缺点

网址:www.buxiugangw.cn  2019-08-02  作者:admin    阅读:

热变形的缺点是:预先加热12Cr1MoVG高压合金管耗能大、费用高,有时还需要多次重新加热(如锻造),以便保持12Cr1MoVG高压合金管能在合适的温度范围内进行热加工;大尺寸坯料的均匀加热也较困难;由此产生的坯料力学性能的差异和变形状态的不均一;坯料在高温下长时加热产生的烧损也影响材料的成材率;金属氧化引起表面化学成分的偏析和脆化,也是造成热变形产品表面质量不佳以及裂纹、破损的根源之一。
The disadvantage of thermal deformation is that pre-heating 12Cr1MoVG high pressure alloy tube consumes a lot of energy and costs, and sometimes it needs to be reheated several times (such as forging) in order to keep 12Cr1MoVG high pressure alloy tube hot-working in a suitable temperature range; uniform heating of large size billet is also difficult; the resulting mechanical properties of billet are poor. Variation and non-uniformity of shape change; burning of billet at high temperature for a long time also affects the yield of material; segregation and embrittlement of surface chemical composition caused by metal oxidation is also one of the causes of poor surface quality, cracks and breakage of hot-deformed products.

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