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A hot forging method of stainless steel casting having ferrite-austenite dual phase

机译：具有铁氧体 - 奥氏体双相的不锈钢铸件的热锻造方法

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摘要

The present invention relates to a hot forging method of 2507 grade super duplex stainless steel used for parts requiring high corrosion resistance, such as ships, petrochemicals, and power generation facilities. The present invention, by weight %, C: 0.03% or less, Si: 0.8% or less, Mn: 1.2% or less, Ni: 6.0 to 8.0%, Cr: 24.0 to 26.0%, Mo: 3.0 to 5.0%, N: 0.24 Hot forging at a molding speed of ^{3s -1} or less until cooled to 1150℃ after heating a stainless steel cast material with a ferrite-austenite abnormal structure composed of ~0.32%, remaining Fe and other inevitable impurities at 1200~1250℃ It is characterized by hot forging press at a molding speed of ^{2s -1} or less until it is cooled to 1100℃, and hot forging press at a molding speed of ^{1s -1 or less until it is cooled to 1050℃.} According to the present invention, it is possible to minimize molding defects during hot forging by efficiently pressing the hard-to-process 2507-class super duplex stainless steel cast material, as well as to manufacture a molded part having an excellent microstructure.

机译：本发明涉及用于2507级超级双相不锈钢的热锻造方法，用于需要高耐腐蚀性的零件，如船舶，石化和发电设施。本发明，重量％，C：0.03％或更低，Si：0.8％或更低，Mn：1.2％或更低，Ni：6.0至8.0％，Cr：24.0至26.0％，Mo：3.0至5.0％， N：0.24在加热不锈钢浇铸材料后冷却至1150℃的模塑速度以0.24的模塑速度，直至1150℃，用铁氧体 - 奥氏体异常结构组成〜0.32％，剩余的Fe和在1200〜1250℃的其他不可避免的杂质，其特点是热锻压力机以 2s -1 -1 / sop>或更少的成型速度，直到它被冷却至1100℃，并且热锻锻压在成型速度< Sup> 1S -1或更低，直到将其冷却至1050℃。根据本发明，通过有效地按压淬火到工艺2507级超级双链式不锈钢，可以最大限度地减少在热锻期间的模塑缺陷钢铸造材料，以及制造具有优异组织的模塑部件。

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公开/公告号KR20210049536A

专利类型
公开/公告日2021-05-06

原文格式PDF
申请/专利权人 박혜미;
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申请/专利号KR1020190133954
发明设计人 박혜미;
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申请日2019-10-25
分类号B21J5;B21J1;B21J1/06;C21D1/02;C22C38;C22C38/44;
国家 KR
入库时间 2022-08-24 18:46:30

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