High chromium alloy hammer head of stone hammer crusher related knowledge details introduction:
The alloy block is cast on the working surface of the hammer head, and the alloy block and the hammer head are combined together to achieve better wear resistance and toughness. This greatly improves the work efficiency, the service life is 3-5 times higher than that of high manganese steel, and the production output and quality are improved to a certain extent.
The main feature of the alloy casting wear-resistant hammer is that several pieces of steel and gold are embedded in the working part, which greatly improves the wear resistance of the hammer. After the utility model is embedded with several alloy blocks, the service life of the hammer head is more than five times longer than that of the original product. Crushing efficiency increased by more than 30%, the hammer is widely used in cement plant limestone, clinker, brick plant shale, coal gangue, coke, metallurgy, glass, coal, mining ore crushing industry!

At present, most of the domestic hammer crusher hammer head uses high manganese steel material. The traditional high manganese steel hammer head has poor wear resistance, short service life and large consumables. To this end, Shandong Sanxiang Heavy Industry Co., Ltd. will design the hammer into the hammer handle and the hammer end are manufactured respectively, of which the hammer handle part is made of high manganese steel or carbon steel, so that it has enough strength and toughness, and the hammer part is made of high chromium cast iron. The high chromium cast iron is a material with excellent wear resistance, so the hammer end will have enough wear resistance, at the same time because the high chromium cast iron toughness is low, easy to brittle fracture, so the hammer handle choose high toughness of high manganese steel or carbon steel material, to overcome the shortcomings of a single material. The impact force of the hammer in the work is not large, so that the work hardening effect of the high manganese steel hammer is not significant, and its anti-erosion and wear ability is poor. Since Cr can strengthen austenite and improve the hardness, strength and wear resistance of steel, adding Cr element to high manganese steel can greatly strengthen the hammer. When crushing iron ore, the service life of the alloy hammer head of the stone crusher is 50% higher than that of ordinary high manganese steel.

According to the need of the abrasion resistance of the hammer head of the sand making machine, it is advantageous to increase the carbon content appropriately, but the increase of carbon content reduces the toughness of the hammer head of the sand making machine, and the carbon content should be controlled at 2.46% ~ 2.88%.
Chromium is the main alloying element in the hammer of the sand making machine, which can be combined with carbon to form (Cr,Fe) 7C3 type eutectic carbide, which is the main anti-wear phase in the alloy. In addition, the chromium solidly dissolved in the matrix can improve the thermal strength and oxidation resistance of the hammer of the sand making machine, but the excessive chromium content will dramatically increase the residual austenite and produce low hardness (Cr, Fe) 23C6 carbides, so that the anti-wear performance of the hammer of the sand making machine is reduced, so the chromium content is controlled at 14% ~ 18%.
Silicon and manganese are conducive to deoxidation, silicon excess will lead to a decrease in mechanical properties, manganese will increase the amount of residual austenite in the quench tissue, reduce the abrasion resistance of the hammer head of the sand making machine, so silicon is generally controlled in 0.42% ~ 0.86%, manganese control in 0.62% ~ 1.2%.
Adding an appropriate amount of molybdenum and nickel is to improve the hardenability, molybdenum content is controlled in 0.03% ~ 1.26%, nickel control in 0.057% ~ 1.6%. Rare earth has the effect of deoxidation, desulfurization and elimination of other harmful impurities, but excessive lead to the increase of inclusions, reduce the strength and toughness of the sand making machine hammer, rare earth is generally controlled in 0.06% ~ 0.021%.
The hammer head is a key part of the hammer crusher used in building materials, mining, chemical and other industries, and it is also a wearing part. The traditional hammer is mostly cast with high manganese steel, which uses the characteristics of work hardening of high manganese steel under impact load to improve the wear resistance, but its wear resistance is far from suitable for the modern production needs of high efficiency and low consumption.

Due to the short life of the hammer head and frequent shutdown and replacement, reducing the equipment operating rate, it is necessary to seek a new material and new process to improve the performance and service life of the hammer head of the stone crusher.
High chromium wear-resistant alloy hammer head hammer handle adopts good toughness material, hammer end adopts good wear resistance material, and adopts certain production technology to organically combine the two, so that the hammer head meets the requirements of toughness and wear resistance at the same time.
Bimetal hammer generally refers to the hammer handle and hammer head selection of two kinds of alloys, the hammer handle selection of hammer with impact toughness, hammer head selection of high hardness hammer, but the hammer handle and hammer is combined in two ways, one is mechanical composite, also known as cold composite, the other is metallurgical combination in casting is selected at the same time double liquid composite casting, bimetal hammer selection or double liquid composite hammer, Because the hammer and the hammer handle will not break, it can resist strong impact, especially when the material crushing feed is large, the mechanical composite hammer is generally the hammer handle cast out first, and then the hammer head of high chromium iron poured into the wrap the hammer handle, but the inside is still not to achieve metallurgical composite, and in the heat treatment is easy to burst, the hammer head is also easy to damage when broken.

The high chromium alloy composite hammer produced by Shandong Sanxiang Heavy Industry Co., Ltd. has a high service life, but its casting and heat treatment process is complicated. To this end, in recent years, Shandong Sanxiang stone crusher mill machine factory has developed a variety of low alloy steel hammer, steel alloy element content is small, low production cost, simple process, through the appropriate heat treatment can obtain the required mechanical strength. After the analysis of the operating condition of the hammer head and the experiment on the crusher, it is confirmed that the material conforms to the performance indicators of the hammer head, and can be used as a good hammer head material, which is the low carbon alloy steel hammer head of the hammer crusher.