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funthing金虫 (小有名气)
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【求助】均匀化处理 已有4人参与
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均匀化处理的概念是什么？主要起什么作用？ 跟预处理有什么区别？如果有区别的话，预处理主要起什么作用？ 谢谢各位虫友啦！~~ |
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zhaochong85
铁杆木虫 (正式写手)
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2楼2010-12-02 22:50:08
3楼2010-12-03 11:12:23
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小木虫(金币+0.5):给个红包，谢谢回帖交流
jic8417(金币+1):谢谢参与 2010-12-03 17:10:20
小木虫(金币+0.5):给个红包，谢谢回帖交流
jic8417(金币+1):谢谢参与 2010-12-03 17:10:20
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Homogenization is a heat treatment at a high temperature that enables fast diffusion while no local melting occurs. During homogenization, three things occur: (i) elimination or reduction of micro-segregation, (ii) phase transformation and/or phase modification of coarse intermetallic particles (constituents), and (iii) coarsening of fine intermetallic particles (dispersoids). Homogenization is normally followed by hot rolling. However, in rare cases ingots are homogenized in one place, cooled down and transported to another place for hot rolling, or, some materials, usually relatively pure alloys, need not homogenization. In these two cases, ingots are heated up to hot rolling entrance temperature then hot rolled. This heat treatment is termed pre-treatment. Pre-treatment temperature is equal to or lower than homogenization temperature. To summarize: (1) Homogenization is a heat treatment to homogenize material, meanwhile, it may also be (usually is) the pre-treatment for hot rolling. (2) Pre-treatment is a heat treatment for hot rolling, it may or may not (usually not) have homogenization effect. |
4楼2010-12-03 14:16:30
funthing
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5楼2010-12-03 19:53:40
funthing
金虫 (小有名气)
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6楼2010-12-03 19:55:25
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小木虫(金币+0.5):给个红包，谢谢回帖交流
xucz(金币+2):辛苦了 2010-12-04 01:07:29
小木虫(金币+0.5):给个红包，谢谢回帖交流
xucz(金币+2):辛苦了 2010-12-04 01:07:29
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Two more things: (1) Homogenization temperature is normally higher than pre-treatment temperature, and homogenization time (soaking time) is often longer than pre-treatment time. If hot rolling is immediately after homogenization, usually we have to cool the ingot slightly down to the hot rolling entrance temperature (pre-treatment temperature). (2) In industry, people often use words like pre-treatment or preheat to indicate homogenization, although they have slightly different meanings. [ Last edited by 金教授 on 2010-12-3 at 20:06 ] |
7楼2010-12-03 20:03:06
