CN1904112A

CN1904112A - dh ductile iron antiwear form relieved tooth

Info

Publication number: CN1904112A
Application number: CN 200510089290
Authority: CN
Inventors: 彭怀春
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-29
Filing date: 2005-07-29
Publication date: 2007-01-31

Abstract

This invention relates to a type of dh nodular cast iron abrasion resistance shovel teeth. Alloy element is mainly added with type of compound mineral material power at first. Alloy materials includes (%) CaC2 (carbide)/Ca 0.03-0.05,MgO(magnesia power)/Mg 0.01-0.02,Al0.40-0.50,[co(NH2)2]( urea)/N0.20-0.25, N2B4O7(boron sand)/B0.60-0.80,Al2O3(emery sand)/Al2O30.02- 0.03,TiO2(rutile)Ti0.03-0.04,ZrO2/Zr0.02-0.03, V2O5/V0.06-0.08,Nb2O5 .Ta2O5(tantalite power)/Nb .Ta 0.02-0.03,Cr2O3(chromite power)/Cr0.50-0.80,MoS2(molybdenite power)/Mo0.02-0.03,MnO2(pyrolusite power)/Mn0.20-0.30,REO(rare earth power)/RE0.50-0.60. After pre-heat, adding above alloy materials to hot metal which contain nodular cast iron in the ordinary smelting furnace, and using ordinary sand mold or metal mold to forming shaping. High antifriction property, low breakage rate, good impelling strength, and high corrosion stability.

Description

The dh ductile iron antiwear form relieved tooth

The present invention relates to a kind of cast iron alloy antiwear form relieved tooth.

Existing ball mill white cast iron anti-wear teeth, though use properties is preferably arranged, but it is expensive that appointed condition height, complex manufacturing, alloy material are worth, alloy material as the white cast iron anti-wear teeth of chromium 15% molybdenum 30% and chromium 18% manganese 2.8% is to join steel scrap melting in basic electric arc furnace with " ferrochrome ", " ferro-molybdenum ", " manganeseirom " with the GB pig iron, also will carry out oxidation, reduction and adjustment Chemical Composition, particularly chromium 18% manganese 2.8% also needs rotten processing repeatedly after melting.Casting mold needs special sand, sand mold or heating resisting metal type, and chromium content height, special molybdenum is the alloy material of rare costliness.

Purpose of the present invention: be exactly to utilize common smelting furnace, simple technology, cheap alloy material to add in the iron liquid of common spheroidal graphite composition, can be cast as the higher ductile iron antiwear form relieved tooth of resistance to abrasion.

The present invention is by (%) CaC ₂(calcium carbide) Ca (calcium) 0.03～0.05, MgO (magnesia powder) Mg (magnesium) 0.01～0.02, Al (aluminium) 0.40～0.50, [co (NH ₂) ₂] (urea) N (nitrogen) 0.20～0.25, N ₂B ₄O ₇(borax) B (boron) 0.60～0.80, Al ₂O ₃(emergy powder) Al ₂O ₃(alundum (Al2O3)) 0.02～0.03, TiO ₂(golden red stone flour) Ti (titanium) 0.03～0.04, ZrO ₂(zirconium English powder) Zr (zirconium) 0.02～0.03, V ₂O ₅(vanadic sulfide tantalite power) V (vanadium) 0.06～0.08, Nb ₂O ₅Ta ₂O ₅(tantalite power) NbTa (niobium tantalum) 0.02～0.03, Cr ₂O ₃(chromite powder) Cr (chromium) 0.50～0.80, MoS ₂(the smart powder of molybdenite) Mo (molybdenum) 0.02～0.03, MnO ₂(refined pyrolusite mineral powder) Mn (manganese) 0.20～0.30, REO (rare earth power) RE (rare earth) 0.50～0.60.

Add in the casting ladle after the above alloy material preheating and pour at common smelting furnace (tilting cupola, medium-frequency induction furnace), the molten iron of the common spheroidal graphite composition of melting gets final product casting.

Technical characterictic: the alloy material of adding is with the smart powder of the mineral substance of chemical combination attitude substantially, and is nitride forming element.

Through manufacturing experimently its performance: HRC (Rockwell hardness number) 55～60, J/cm ²7～8 (notched bar impact strengths), rupture rate＜1%, corrosion resistance height, particularly wet mill use.

Claims

A kind of cast-iron alloy antiwear form relieved tooth, existing white cast iron anti-wear teeth, the alloy material of chromium 15% molybdenum 3% and chromium 18% manganese 2.8% joins steel scrap with " ferrochrome ", " ferro-molybdenum ", " manganeisen " with the GB pig iron and found moulding in basic electric arc furnace, and the present invention is by (%) CaC ₂(calcium carbide) Ca (calcium) 0.03～0.05, MgO (magnesia powder) Mg (magnesium) 0.01～0.02, Al (aluminium) 0.40～0.50, [co (NH ₂) ₂] (urea) N (nitrogen) 0.20～0.25, N ₂B ₄O ₇(borax) B (boron) 0.60～0.80, Al ₂O ₃(emergy powder) Al ₂O ₃(alundum (Al2O3)) 0.02～0.03, TiO ₂(rutile) Ti (titanium) 0.03～0.04, ZrO ₂(zirconium English powder) Zr (zirconium) 0.02～0.03, V ₂O ₅(vanadic sulfide tantalite power) V (vanadium) 0.06～0.08, Nb ₂O ₅Ta ₂O ₅(tantalite power) NbTa (niobium tantalum) 0.02～0.03, Cr ₂O ₃(chromite powder) Cr (chromium) 0.50～0.80, MoS ₂(the smart powder of molybdenite) Mo (molybdenum) 0.02～0.03, MnO ₂(refined pyrolusite mineral powder) Mn (manganese) 0.20～0.30, REO (rare earth power) RE (rare earth) 0.50～0.60, add in the casting ladle after the alloy material preheating and pour common smelting furnace (tilting cupola, medium-frequency induction furnace), moulding by casting in the iron liquid of the common spheroidal graphite composition of melting, its technical characterictic is: the alloy material of adding is with the smart powder of the mineral matter of chemical combination attitude substantially, and is nitride forming element.