千万别买厉害国出的炒菜锅，铅含量超标好多倍

[huangchong]

这件事，也很典型。

起因是小镇换了水源，然后居民抱怨新水味道怪。最后查出来有铅，还有军团菌。

最后说铅的来源是旧的水管。

我看这事，实际上是换了水源以后，有严重的有机污染，导致小镇居民警惕引起调查。然后调查的副产物是发现原来还有铅污染。

我看很可能他们喝了100年铅水，但是因为铅水没味道，谁也不知道。

所以不查就是没问题。以美国这种因循守旧的个性，很可能在使用中的铅管还挺普遍的，远不止这种上了新闻的个案。

There are an estimated 43,000 service lines in the city; when the crisis began, these included 3,500 lead lines, 9,000 known galvanized steel lines, and 9,000 unknown service lines.

[xiaoju]

炼钢时加更贵的金属干什么？

纯度低，便宜

[fangkuuaih]

中国有没有品牌的铁锅，就像十八子菜刀这样的品牌。

[fangkuuaih]

唐人街傻逼文盲，别脑补，铁的熔沸点远远高于铅，温度超过400℃时就会有大量铅蒸气。炼铁的那温度，铅是少之又少了。

尼玛又是个文盲。铅的气化温度1740度，铁的熔点1535度。
更何况打铁锅就是稍微熔化就敲打，即使超过铅的沸点也是很短的时间，内部的铅根本不会除掉。

[omniscience]

尼玛又是个文盲。铅的气化温度1740度，铁的熔点1535度。
更何况打铁锅就是稍微熔化就敲打，即使超过铅的沸点也是很短的时间，内部的铅根本不会除掉。

唐人街二逼，听好了，一加热铅就迅速与氧、硫、卤素反应，加热到400摄氏度以上时有大量铅蒸汽逸出

你麻痹的又从烧开水那里脑补，沸点到后才变成气态。

一看到你习惯性脑补就想笑

[fangkuuaih]

唐人街二逼，听好了，一加热铅就迅速与氧、硫、卤素反应，加热到400摄氏度以上时有大量铅蒸汽逸出

你麻痹的又从烧开水那里脑补，沸点到后才变成气态。

一看到你习惯性脑补就想笑

嘎嘎响，又尼玛在胡搅蛮缠。
氧化铅1470 ℃才蒸发。

最重要的是，锻打铁锅的温度只要700-1000度，铁锅有一点软即可，远远不用铁的熔化温度。
尼玛打造铁锅家加硫，加卤素？

你就是纯煞笔玩意。

[lsheng]

光谱仪万物皆可测！某宝买的销量前五，全军覆没！另外... https://v.douyin.com/i2mPUGPm

光谱仪万物皆可测！日本进口的锅，可惜是不锈钢的！#... https://v.douyin.com/i2mP3w87

信了一个标点符号，全输。看到标题，输一半。总是赢系列。

[omniscience]

嘎嘎响，又尼玛在胡搅蛮缠。
氧化铅1470 ℃才蒸发。

最重要的是，锻打铁锅的温度只要700-1000度，铁锅有一点软即可，远远不用铁的熔化温度。
尼玛打造铁锅家加硫，加卤素？

你就是纯煞笔玩意。

唐人街脑残二逼，连生铁中含铅量极其微小这等基本常识都不懂，对世界的认知不是靠学习，而是充分自己发挥“主观能动性”

把烧开水脑补到炼铁上来，还鸡巴恬不知耻的和人争

看好了

Lead in cast iron
Solubility of lead in cast iron is very low; however, some types of pig iron may contain up to 0.003 % Pb. Due to lead-containing raw materials in the furnace charge, the lead content may be increased to 0.02 %.

Lead contents of more than 0.003 % in nodular graphite cast iron cause formation of Widmanstätten graphite and drastically reduce resistance against formation of cracks. Lead contents of this extent stabilize the pearlite phase (see also Pearlite stabilization).

If only magnesium is added to cast iron to promote the formation of nodular graphite (s. Nodular graphite cast iron), lead contents of more than 0.003 % have a rather negative effect. However, this effect is reversed if low Cer quantities are added together with the magnesium.



如果要铁中含铅也可以，要特意添加，这个可不叫“杂质”，而是为了提高工艺。但添加铅显然不算是铸铁了

目的是：

Lead is insoluble in molten iron and usually does not bond with the accompanying and alloy elements present in steel, either. In the solid materials, lead is present in the form of metal particles of sub-microscopic size and finest distribution. The most types of iron ore only contain very low quantities of lead. Usually, the contents in steel are less than 0.01 %.

However, lead is frequently used for steel production to achieve improvement of the material’s machinability at high cutting speeds. The element is added in metal form in quantities of around 0.25% during casting of the steel into ingots. The addition of lead improves the workability of unalloyed or low-alloyed steels even if the machinability of such types of steel is already very good due to relatively high sulfur and phosphorous contents. The improved machinability properties are attributed to the fact that the finely distributed lead particles have a chip-breaking effect. This prevents excessive generation of heat, which would otherwise develop due to friction between the cutting tool and the long, spiral-shaped chips.
Steels treated with lead can be processed at cutting speeds that are around 30% higher than for lead-free steels. These types of free-cutting steels can be soldered and welded without problems and are perfectly suitable for heat treatment and surface finishing

By the addition of lead, hardenability is slightly decreased, while it has hardly any influence on mechanical properties, for example. The latter is in contrast with sulfur- and phosphorous-containing free-cutting steels, with which improved machinability entails embrittlement.

[omniscience]

嘎嘎响，又尼玛在胡搅蛮缠。
氧化铅1470 ℃才蒸发。

最重要的是，锻打铁锅的温度只要700-1000度，铁锅有一点软即可，远远不用铁的熔化温度。
尼玛打造铁锅家加硫，加卤素？

你就是纯煞笔玩意。

你这个二逼最大的特点就是脑补，其内容滑稽感堪比老邱的自我认知

[fangkuuaih]

唐人街脑残二逼，连生铁中含铅量极其微小这等基本常识都不懂，对世界的认知不是靠学习，而是充分自己发挥“主观能动性”

把烧开水脑补到炼铁上来，还鸡巴恬不知耻的和人争

看好了

Lead in cast iron
Solubility of lead in cast iron is very low; however, some types of pig iron may contain up to 0.003 % Pb. Due to lead-containing raw materials in the furnace charge, the lead content may be increased to 0.02 %.

Lead contents of more than 0.003 % in nodular graphite cast iron cause formation of Widmanstätten graphite and drastically reduce resistance against formation of cracks. Lead contents of this extent stabilize the pearlite phase (see also Pearlite stabilization).

If only magnesium is added to cast iron to promote the formation of nodular graphite (s. Nodular graphite cast iron), lead contents of more than 0.003 % have a rather negative effect. However, this effect is reversed if low Cer quantities are added together with the magnesium.



如果要铁中含铅也可以，要特意添加，这个可不叫“杂质”，而是为了提高工艺。但添加铅显然不算是铸铁了

目的是：

Lead is insoluble in molten iron and usually does not bond with the accompanying and alloy elements present in steel, either. In the solid materials, lead is present in the form of metal particles of sub-microscopic size and finest distribution. The most types of iron ore only contain very low quantities of lead. Usually, the contents in steel are less than 0.01 %.

However, lead is frequently used for steel production to achieve improvement of the material’s machinability at high cutting speeds. The element is added in metal form in quantities of around 0.25% during casting of the steel into ingots. The addition of lead improves the workability of unalloyed or low-alloyed steels even if the machinability of such types of steel is already very good due to relatively high sulfur and phosphorous contents. The improved machinability properties are attributed to the fact that the finely distributed lead particles have a chip-breaking effect. This prevents excessive generation of heat, which would otherwise develop due to friction between the cutting tool and the long, spiral-shaped chips.
Steels treated with lead can be processed at cutting speeds that are around 30% higher than for lead-free steels. These types of free-cutting steels can be soldered and welded without problems and are perfectly suitable for heat treatment and surface finishing

By the addition of lead, hardenability is slightly decreased, while it has hardly any influence on mechanical properties, for example. The latter is in contrast with sulfur- and phosphorous-containing free-cutting steels, with which improved machinability entails embrittlement.

煞笔。这种铁锅用的是装化学试剂化学危险品的废铁桶为原料。

[omniscience]

煞笔。这种铁锅用的是装化学试剂化学危险品的废铁桶为原料。

我操，又脑补了

你就因为看了网友贴了个视频，然后就脑补出这种是用汽油桶做的锅？

总之，你记着，生铁极难含铅，在冶炼中，石头变焦块的时候，铅就被干掉了。

[sjtuvincent]

光谱仪万物皆可测！某宝买的销量前五，全军覆没！另外... https://v.douyin.com/i2mPUGPm

光谱仪万物皆可测！日本进口的锅，可惜是不锈钢的！#... https://v.douyin.com/i2mP3w87

中国菜那么不健康，你都吃了

而且日本制造的神话早就没有了，就别太迷信日本了

[sjtuvincent]

光谱仪万物皆可测！某宝买的销量前五，全军覆没！另外... https://v.douyin.com/i2mPUGPm

光谱仪万物皆可测！日本进口的锅，可惜是不锈钢的！#... https://v.douyin.com/i2mP3w87

中国菜那么不健康，你都吃了

而且日本制造的神话早就没有了，就别太迷信日本了

[woaibainiu]

中国菜那么不健康，你都吃了

而且日本制造的神话早就没有了，就别太迷信日本了

事实是日本的铅含量很低，你鳖黑作坊就是毒锅，淘宝拼多多打价格战，只能拼命压低成本，可劲卷，卷的就是老百姓的寿命

就算你不买，厉害国饭店也会用

[woaibainiu]

什么牌子的锅也没说，就是给光谱仪做广告的，骗大家去买光谱仪

你觉得他这个小破博主，有胆说出品牌吗？

[verdelite]

唐人街傻逼文盲，别脑补，铁的熔沸点远远高于铅，温度超过400℃时就会有大量铅蒸气。炼铁的那温度，铅是少之又少了。

物理知识没用，事实是炼钢炉爆裂的主要原因是铅。

[verdelite]

你觉得他这个小破博主，有胆说出品牌吗？

南方小作坊用回收铁桶做锅又快又好，啥品牌都不重要了。

[xiaoju]

炼铁需要高炉，温度2000度

尼玛又是个文盲。铅的气化温度1740度，铁的熔点1535度。
更何况打铁锅就是稍微熔化就敲打，即使超过铅的沸点也是很短的时间，内部的铅根本不会除掉。

[xiaoju]

铅是哪里来的？

我怎么觉得焦炭里藏的雷管威力更大？

物理知识没用，事实是炼钢炉爆裂的主要原因是铅。

[verdelite]

炼钢时加更贵的金属干什么？

是杂质