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CN1208142C - 铜管坯的三辊旋轧加工方法 - Google Patents

铜管坯的三辊旋轧加工方法 Download PDF

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CN1208142C
CN1208142C CN 03148162 CN03148162A CN1208142C CN 1208142 C CN1208142 C CN 1208142C CN 03148162 CN03148162 CN 03148162 CN 03148162 A CN03148162 A CN 03148162A CN 1208142 C CN1208142 C CN 1208142C
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rolling
copper pipe
processing method
pipe blank
cold
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CN1468670A (zh
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张习刚
王智斌
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Chongqing Pinghu Jinlong Precision Copper Pipe Co ltd
Golden Dragon Precise Copper Tube Group Inc
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XINXIANG NON OXYGEN COPPER MAT
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Abstract

本发明铜管坯的三辊旋轧加工方法，涉及水平连铸坯料的冷加工工艺领域，在CN1019750B专利文件公开的工艺中明确规定用PSW三辊行星轧机加工时，单一轧制道次冷轧面积缩减率应保持至少为70%，但试验表明该范围太宽，在该范围内不可能都能达到晶粒细化，达不到良好的轧制效果，本发明提出了单一轧制道次冷轧面积缩减率应为91-95%，轧制速度为13-16m/min，得到的晶粒度为0.005-0.050mm，在节约大量能源的条件下本发明具有轧制效果好，生产率高的特点。

Description

铜管坯的三辊旋轧加工方法
                        技术领域
本发明涉及金属材料冷加工领域，尤其是水平连铸坯件的轧制工艺领域。
                        技术背景
随着工业的发展，对有色金属小口径薄壁管的需求越来越大，尤其是在电冰箱、空调机等领域对脱氧铜合金管的需求更是成倍地增长。对于铜、铝及其合金的传统加工方法是热加工法，这可以解决因铸造造成的不均匀的晶格结构，在热加工过程中金属会发生再结晶，从而避免晶格的不均匀性，但是对于连续铸造的小横截面坯料，这种工艺是极不经济的。为此芬兰的奥托库姆普联合股份公司发明了一种采用行星轧制技术的冷加工工艺，在加工有色金属时由于材料本身面积的高度缩小与内摩擦的作用，材料的温度能升高到再结晶的温度，即使没有预热处理或中间退火处理，在材料的微观结构方面也能取得良好的结果。在他们的专利申请文件(申请号88101739，审定号CN1019750B，审定公告日1992年12月30日)中指出：用PSW行星斜辊轧制方法对铜或铜合金材料的管坯进行冷轧，在单一轧制道次中冷轧的面积缩减率应保持至少为70％，其面积缩减和材料变形所产生的内摩擦可使管坯的温度升至250-700℃，冷轧后管子的晶粒度可保持在0.005-0.050mm，从而得到良好的轧制效果。
但是在我们的试验过程中发现，对直径为80/40mm的水平连续铸造的脱氧磷铜(Cu-DHP)铸坯在三辊行星轧机上进行轧制时，轧制成直径为46/40mm的铜管是非常困难的，在以后的拉拔机上拉拔时，拉断率达50％以上，即单一轧制道次冷轧面积缩减率为89％，仍不能达到良好的轧制效果，这说明上述专利文件所公开的冷轧工艺条件、范围太宽，在给出的范围内不可能都能达到晶粒细化的要求，达不到良好的轧制效果。有必要作进一步的研究，以便寻找合适的轧制工艺。
                         发明内容
本发明的目的是提供一种用三辊行星轧机对脱氧铜及铜合金管轧制时，能得到良好轧制效果的铜管坯的三辊旋轧加工方法。
经研究，用三辊行星轧机进行对水平连铸的脱氧铜及铜合金管坯轧制时，仅仅控制单一轧制道次面积缩减率不易获得良好的轧制效果，即使面积减缩率达到89％时，仍不能达到良好的效果，还应同时控制坯料的轧制速度，在两者同时控制的情况下才能获得良好效果。试验证明能得到良好轧制效果的冷轧条件是单一轧制道次面积缩减率应为91-95％，管坯轧制速度为13-16米/分钟。优先选用的面积缩减率为94％。
用以上工艺条件轧制后得到的管材晶粒度为0.020-0.040mm，轧制管坯状态为软态，只需较小的能量就能进行后道拉拔工序，提高了加工效率；而且管壁厚度均匀；由于轧制生产率得到了很大提高，每小时成品可达2.5吨，所以本发明在节省大量能源的条件下仍能取得良好的轧制效果。
                         具体实施方式
实施例1：用PSW轧机将管径为80/40mm的脱氧磷铜铸坯轧制为48.5/44mm，壁厚为2.3-0.20 +0.15mm，轧制面积缩减率91％，轧制速度为13m/min。
实施例2：用PSW轧机将管径为90/40mm的脱氧磷铜铸坯轧制为48.5/44mm，壁厚为2.3-0.20 +0.15mm，轧制面积缩减率94％，轧制速度为16m/min。
实施例3：用PSW轧机将管径为100/50mm的脱氧磷铜铸坯轧制为60/55mm，壁厚为2.5-0.30 +0.30mm，轧制面积缩减率92.3％，轧制速度为16m/min。
以上三个实施例轧制的铜管晶粒度为0.02-0.04mm，经后道拉拔工序，壁厚均匀性好，各批次之间质量稳定。

Claims (2)

1.铜管坯的三辊旋轧加工方法，用三辊行星轧机进行轧制，其特征为在单一道次轧制时面积缩减率应达到91-95％，管坯轧制速度为13-16米/分钟。
2.根据权利要求1所述的铜管坯的三辊旋轧加工方法，其特征为优先选用的单一道次轧制时面积缩减率为94％。
CN 03148162 2003-07-04 2003-07-04 铜管坯的三辊旋轧加工方法 Expired - Lifetime CN1208142C (zh)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1695839B (zh) * 2004-08-17 2010-07-07 江苏包罗铜材集团股份有限公司 铸锭冷穿、冷扩孔的三辊斜轧方法
CN100372621C (zh) * 2006-04-24 2008-03-05 江苏兴荣高新科技股份有限公司 一种铜铝复合管材的制造方法及该方法制造的铜铝复合管材
CN101569893B (zh) * 2009-05-11 2012-10-24 金龙精密铜管集团股份有限公司 铝或铝合金无缝管的制造方法
JP4869415B2 (ja) * 2010-02-09 2012-02-08 三菱伸銅株式会社 純銅板の製造方法及び純銅板
CN104550310A (zh) * 2014-10-17 2015-04-29 江西鸥迪铜业有限公司 一种水平连铸黄铜管轧制工艺

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