Use orthogonal experimental method to study, the mass fraction ofboron from 1.5% to 2.5%, the mass fraction of carbon change and its impact onthe hardness and impact toughness of high boron iron-based alloy from 0.2% to0.5%, the studies provided the basis of the materials.Boron as an alloying element in steelapplications did not have a long time, the first industrial application ofboron as an alloying element in 1934, aims to increase the steel hardenability.
People study found that trace amounts of boron powder can greatlyimprove the hardenability of steel and other precious elements such aschromium, nickel, manganese, etc want to achieve the same effect, the contentmust be several times or even a hundred times than boron. Boron as alloyingelements to improve the hardenability, the content in the steel is low. Whenthe mass fraction of boron exceeds 0.01%, the tissue appears in the brittleborides, the toughness of the steel is lower. Boron is relatively rich contentof an element in the earth’s crust, as an alloying element to apply, you cansave a lot of precious elements, have a positive meaning in industrialproduction.High-boron-iron-base alloy is a newwear-resistant material, which contains a wear-resistant phase boride, similarto material is a white cast iron. Currently, the researches aboutwear-resistant materials containing carbide wear-resistant phase is more, butrelatively little research on containing borides wearable phase ofwear-resistant materials. On the basis of such material, it is also desirableto be able to reduce precious elements added in the case of wear resistancedoes not drop, reducing material costs. Such materials in design ideas is thecontent of boron in the steel is controlled at between 0.5% to 3.8%. Due to theextremely low solubility of boron in iron (boron is less than 0.0004% of thesolubility of the ±-Fe, ³-Fe a solubility of only 0.02%, so most of the addedboron formed borides, borides, having a very high hardness (such as boron andiron generated Fe2B hardness HV1400 ~ 1500) and thermal stability and istherefore a good wear phase by adjusting the carbon content at the same time tocontrol the microstructure and properties of the matrix, to obtain a goodoverall performance of wear-resistant materials.The mass fraction of the high boroniron-based alloy of boron is generally in the range of 0.5% to 3.8%, ahypoeutectic alloy. In cast condition, Organization composed of borides ferriteand pearlite three-phase. In the organization ferrite with the form ofirregular lumps, distributed around the boride that this distributioncharacteristics may be related with the alloy 910 peritectoid reaction; the boride was continuous network ledeburite morphology,the base body is divided; pearlite in the boride and the ferrite between thetwo phases, the number of the carbon content and the type and content of otheralloying elements. Studies by metal powder supplier suggest that forthe wear-resistant material having a wear-resistant phase, the volume fractionof its abrasion should be within the range from 20% to 30% to have a betterabrasion resistance.
Borides content is determined by the content of the boronin the alloy, macro-hardness of the material is determined by the hardness ofthe hardness of the China tungsten carbide suppliers matrix and borides content. Boride is a compound of therigid substrate, is the source of the material toughness, the properties of thematrix by the carbon content of the greatest impact, while the number anddistribution state of the boride will also have an important impact toughnessof the material, therefore boron, carbon are the two most important elementsthat determine the basic performance of the high-boron iron-based alloys, itscontent to the organization and performance of high-boron iron-based alloys is thebasis of researching this material.
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