不同材料的破碎机锤头各有什么特点? - 移动式碎石机租赁

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不同材料的破碎机锤头各有什么特点?
网址:http://www.danricelaw.com    发布时间:2019-08-14
锤头是破碎机中的重要作业部件,高质量的耐磨锤头是保证破碎机正常工作的基础,锤头的寿命取决于锤头的质量与破碎物料的特性,这也决定了破碎机的工作效率。移动碎石机租赁厂家介绍,矿山机械行业常见破碎机锤头材质主要有以下几种:高锰钢、中锰钢、高铬铸铁、低碳合金钢。这几种材质铸造的锤头各有特色,也各有优缺点:
Hammer head is an important working part of crusher. High-quality wear-resistant hammer head is the basis to ensure the normal operation of crusher. The life of hammer head depends on the quality of hammer head and the characteristics of crushing materials, which also determines the working efficiency of crusher. Mobile gravel crusher leasing manufacturer introduced that the common materials of hammer of crusher in mining machinery industry are as follows: high manganese steel, medium manganese steel, high chromium cast iron, low carbon alloy steel. The hammers made of these materials have their own characteristics and advantages and disadvantages.
1、高锰钢是锤头传统材质,是抗冲击磨损的典型耐磨钢,具有很好的韧性和很强的加工硬化倾向,在冲击条件下显示出优越的耐磨性。在较大的冲击或接触应力的作用下,表面层将迅速产生加工硬化,其加工硬化指数比其它材料高5-7倍,耐磨性得到较大的提高。但高锰钢的耐磨性只是在具备足以形成加工硬化的条件下才表现出其优越性,其他情况下如物理冲击力不够或接触应力小不能使表面迅速产生加工硬化,则耐磨性很差。
1. High manganese steel is the traditional material of hammer head. It is a typical wear-resistant steel against impact wear. It has good toughness and strong work-hardening tendency. It shows excellent wear resistance under impact conditions. Under the action of larger impact or contact stress, the surface layer will produce work hardening rapidly, and its work hardening index is 5-7 times higher than other materials, and its wear resistance is greatly improved. However, the wear resistance of high manganese steel shows its superiority only when it has enough working hardening conditions. In other cases, if the physical impact force is not enough or the contact stress is small, the wear resistance of high manganese steel is very poor.
2、中锰钢既不增加锤头的价格、又能达到筑造高锰钢锤头使用效果,实际使用寿命比筑造高锰钢提高了50%以上。铸态中锰钢锤头的优点在于其有磁性,可以通过磁选除去矿石中的铁屑,而高锰钢则没有这个优点。
2. Medium manganese steel not only does not increase the price of hammers, but also achieves the use effect of building high manganese steel hammers. The actual service life of high manganese steel hammers is more than 50% higher than that of building high manganese steel hammers. The advantage of as-cast medium manganese steel hammer is its magnetism, which can be removed by magnetic separation, while high manganese steel has no such advantage.
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3、高铬铸铁是一种具有优良抗耐磨性能的耐磨材料,但韧性较低,易发生脆性断裂,为使高铬铸铁锤头安全运行,人们在此基础上开发了复合锤头,即将高铬铸镶铸在高锰钢或低合金钢锤头头部,或者锤头工作部分采用高铬铸铁,锤柄部分采用碳钢,将两者复合起来,使锤头头部具有高硬度,高耐磨性,而锤柄部具有高韧性。
3. High chromium cast iron is a kind of wear-resistant material with excellent wear resistance, but its toughness is low and brittle fracture is easy to occur. In order to make the hammer of high chromium cast iron run safely, people have developed a composite hammer on this basis, that is, high chromium cast-in-place in the hammer head of high manganese steel or low alloy steel, or high chromium cast in the working part of the hammer head. Iron and hammer handle are made of carbon steel, which are combined to make the head of hammer have high hardness, high wear resistance and high toughness.
4、高铬铸铁主要为含铬、钼等种元素的合金结构钢,硬度高、韧性好,符合锤头具有较高的使用寿命。在同等工况条件下,其使用寿命至少比高锰钢锤头提高1倍以上。但其制造工艺复杂,工艺要求严格,且锤头的调质热处理很关键,调质热处理后不仅要求整体抗拉强度达850MPa以上,而且要求有相当的塑性和韧性,同时严禁铁块进入破碎机,要求在喂料前端有二级吸铁装置。
4. High chromium cast iron is mainly alloy structural steel containing chromium, molybdenum and other elements. It has high hardness and good toughness, and accords with the high service life of hammer head. Under the same working conditions, its service life is at least 1 times longer than that of high manganese steel hammers. However, its manufacturing process is complex, the process requirements are strict, and the quenching and tempering heat treatment of hammer head is crucial. After quenching and tempering heat treatment, not only the overall tensile strength is over 850 MPa, but also considerable plasticity and toughness are required. At the same time, it is strictly forbidden for iron blocks to enter the crusher, and secondary iron absorption devices are required at the front end of the feed.
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Today's wonderful content will be introduced here for the time being. Welcome to Baidu Search: Mobile gravel rental, so that we can find us, we will regularly release more relevant information, you can also directly collect our official website: http://www.danricelaw.com! Thank you for your long-standing support!

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