Impact crusher is generally used as secondary crusher, and by changing rotor and crushing cavity, it can also be used as primary crusher according to the customer's requirements. It is widely used in highway, power & water, railway, airport and other fields that need rock with high quality standard. It features high performance, high reduction ratio, cubic shape, etc. Its biggest disadvantage is that the blow bar and impact plate is particularly easy to wear, especially broken hard ore and abrasion, it often need to change. To solve these problems, we Shanghai Longyang Machinery Factory adopt the high quality wear-resistant materials which has been applied in many metal concentrator.