热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2009年
24期
33-35
,共3页
胡宽辉%胡树兵%田德新%冯冠文
鬍寬輝%鬍樹兵%田德新%馮冠文
호관휘%호수병%전덕신%풍관문
组织%轧后冷却%力学性能%超高强度钢
組織%軋後冷卻%力學性能%超高彊度鋼
조직%알후냉각%역학성능%초고강도강
microstructure%cooling after rolling%mechanical property%ultra high strength steel
通过对比两种不同的轧后冷却工艺对汽车用含硼超高强度钢组织与性能的影响,得出此类钢轧制后喷水快速冷却到450℃,然后空冷至室温,可以获得贝氏体+铁素体组织,从而使实验钢获得较高的屈服强度和抗拉强度;而轧制后直接空冷至室温,获得的组织为铁素体+细珠光体+少量贝氏体,实验钢的抗拉强度较前者低260MPa.
通過對比兩種不同的軋後冷卻工藝對汽車用含硼超高彊度鋼組織與性能的影響,得齣此類鋼軋製後噴水快速冷卻到450℃,然後空冷至室溫,可以穫得貝氏體+鐵素體組織,從而使實驗鋼穫得較高的屈服彊度和抗拉彊度;而軋製後直接空冷至室溫,穫得的組織為鐵素體+細珠光體+少量貝氏體,實驗鋼的抗拉彊度較前者低260MPa.
통과대비량충불동적알후냉각공예대기차용함붕초고강도강조직여성능적영향,득출차류강알제후분수쾌속냉각도450℃,연후공랭지실온,가이획득패씨체+철소체조직,종이사실험강획득교고적굴복강도화항랍강도;이알제후직접공랭지실온,획득적조직위철소체+세주광체+소량패씨체,실험강적항랍강도교전자저260MPa.
Comparing the influences of two different kinds of cooling after rolling on microstructure and properties of ultra strength steel with boron, the bainite + ferrite microstructure could be gained by spray water cooling to 450℃ and then natural cooling to room-temperature, therefore, the high yield strength and tensile strength of the testing steel could be gained. Ferrite + fine pearlite + little bainite microstructure could be gained by natural cooling to room-temperature after rolling, the tensile strength of the testing steel is lower 260 MPa than that of the former.
