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液压零件中油缸的缸筒设计要求采用35、45钢调质处理,薄壁的筒状零件采用常规的调质处理易变形或者开裂。在生产实践中,我们经多次验试采用了亚温淬火新工艺,新工艺实施后取得了显著效果。一、亚温淬火基本原理亚温淬火亦称两相区加热淬火,或称临界区淬火,是将亚共析钢加热至奥氏体和铁素体两相区后进行淬火,随后回火。这种工艺方法可以提高钢的韧性,降低脆性转变温度以及抑制可逆回火脆性。目前有这样的解释:由于亚温淬火加
Hydraulic cylinder parts cylinder design requires the use of 35,45 steel quenched and tempered, thin-walled cylindrical parts with conventional quenching and tempering deformation or cracking. In the production practice, we have adopted several tests of sub-temperature quenching new technology, the new technology has achieved remarkable results. First, the basic principles of sub-temperature quenching Sub-temperature quenching, also known as two-phase heating quenching, or critical quenching, sub-eutectoid steel is heated to austenite and ferritic two-phase quenching, followed by tempering. This process method can improve the toughness of steel, reduce the brittle transition temperature and inhibit the reversible temper brittleness. There is such an explanation: due to sub-temperature quenching plus