CN1687476A

CN1687476A - Laminae made of high chromium cast iron and manufacturing technique

Info

Publication number: CN1687476A
Application number: CN 200510013528
Authority: CN
Inventors: 石卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-19
Filing date: 2005-05-19
Publication date: 2005-10-26

Abstract

The present invention relates to high chromium cast iron for vane of paver, and provides manufacture of the vane. The component of the vane is: C 2.1 - 3.6, Si 0.9, Mn 1.1 - 1.5, P 0.03, S 0.03, Cr 12 - 17, Mo is less than or equal to 1.5, Cu is less than or equal to 1.0 and rare-earth alloy and rare alloy are equal to or less than 1.5. The rest is iron. The production craft is to use molding machines in the mechanized streamlined production. The craft uses resin granulated substance and coal silt, two bosseyed board, spiral vane tile mouth is made of ferrite core and ferrite core is found before. Compare with the invention and existing technology, rare-earth and rare alloy are added in the vane which can increase the toughness of high chromium cast iron. So it decreases the dosage of expensive metal like Cr and so on, it also decreases the production cost. Manufacture craft is simple because we coagulate simultaneously.

Description

A kind of rich chromium cast iron blade and production technique thereof

Technical field

The present invention relates to a kind of paver blade, concrete pump blade, concrete and asphaltic concrete mixer liner plate blade, Stabilized Soil blade of stirrer rich chromium cast iron.

Background technology

Present paver blade, concrete pump blade, concrete and asphaltic concrete mixer liner plate blade, the Stabilized Soil blade of stirrer rich chromium cast iron that uses, because the construction environment of above-mentioned machinery is very abominable, blade is subjected to resistance big again in addition, the easy fracture of blade, work-ing life is shorter, need frequently to change, and normally used rich chromium cast iron is owing to contain a lot of alloying elements, the production cost height, and wear resistance and toughness are also not enough.

Summary of the invention

The purpose of this invention is to provide a kind of wear resistance and good toughness, long service life, low, the simple paver blade of manufacture craft of production cost, and the production technique of this blade is provided.

The object of the present invention is achieved like this, the weight percent of this leaf chemical ingredient is C2.1-3.6, Si0.9, Mn1.1-1.5, P0.03, S0.03, Cr12-17, Mo smaller or equal to 1.5, Cu smaller or equal to 1.0, rare earth alloy and rare alloy smaller or equal to 1.5, all the other are iron.

The production technique of this rich chromium cast iron blade is, adopt the production of molding machine mechanized continuous productive process, with resin sand or coal dust sand molding process, two of single-sided pattern plates one case, helical blade tile edging is become by iron core, iron core is cast in advance that blank processes from strand and was placed in the die cavity before the moulding mould assembling, iron liquid injects from cavity bottom during cast, teeming temperature 1300-1480 degree centigrade, little riser runner is established in the die cavity top, and iron core is worked as chill simultaneously, solidifies with simultaneous solidification behind the iron liquid casting, when being 800-900 degree centigrade for the garnet temperature, foundry goods unpacks, place air to naturally cool to room temperature, with heat-treating behind the foundry goods process ball blast polishing burr, foundry goods is heated to the austenitizing temperature interval then, be incubated 1-8 hour, be cooled to room temperature again and get final product.

The present invention compared with prior art, add rare earth and rare alloy in the leaf chemical ingredient, because rare earth has very strong avidity in oxygen, nitrogen, sulphur etc., play the effect that desulfurization is degassed after adding iron liquid, can improve the toughness of ferrochrome significantly, thereby can reduce the usage quantity of noble metals such as chromium, reduce production costs, because adopt simultaneous solidification to solidify, manufacture craft is simple.

Description of drawings

The present invention does not have accompanying drawing

Embodiment

The weight percent of embodiment 1 this rich chromium cast iron leaf chemical ingredient is C2.1-3.6, Si0.9, Mn1.1-1.5, P0.03, S0.03, Cr12-17, Mo smaller or equal to 1.5, Cu smaller or equal to 1.0, rare earth alloy and rare alloy smaller or equal to 1.5, all the other are iron.

The production technique of this rich chromium cast iron blade is, adopt coal dust sand molding machine modeling, two of single-sided pattern plates one case, helical blade tile edging is become by iron core, iron core is cast in advance that blank processes from strand and was placed in the die cavity before the moulding mould assembling, iron liquid injects from cavity bottom during cast, little riser runner is established in the top, the iron liquid temp is 1300-1480 degree centigrade during cast, little riser runner is established in the die cavity top, and iron core is worked as chill simultaneously, solidifies with simultaneous solidification behind the iron liquid casting, when being 800-900 degree centigrade for the garnet temperature, foundry goods unpacks, place air to naturally cool to room temperature, with heat-treating behind the foundry goods process ball blast polishing burr, foundry goods is heated to the austenitizing temperature interval then, be incubated 1-8 hour, be cooled to room temperature again and get final product.

The weight percent of embodiment 2 these rich chromium cast iron leaf chemical ingredients is C2.1-3.6, Si0.9, Mn1.1-1.5, P0.03, S0.03, Cr12-17, Mo smaller or equal to 1.5, Cu smaller or equal to 1.0, rare earth alloy and rare alloy smaller or equal to 1.5, all the other are iron.

Adopt phenolic sand molding, two of single-sided pattern plates one case, helical blade tile edging is become by iron core, iron core is cast in advance that blank processes from strand and was placed in the die cavity before the moulding mould assembling, iron liquid injects from cavity bottom during cast, little riser runner is established in the top, the iron liquid temp is 1300-1480 degree centigrade during cast, little riser runner is established in the die cavity top, iron core is worked as chill simultaneously, solidify with simultaneous solidification behind the iron liquid casting, when foundry goods is 800-900 degree centigrade for the garnet temperature, unpack, place air to naturally cool to room temperature, to heat-treat behind the foundry goods process ball blast polishing burr then, foundry goods is heated to the austenitizing temperature interval, is incubated 1-8 hour, be cooled to room temperature again and get final product.

Claims

1, a kind of paver blade rich chromium cast iron is characterized in that: the weight percent of this leaf chemical ingredient is C2.1-3.6, Si0.9, Mn1.1-1.5, P0.03, S0.03, Cr12-17, Mo smaller or equal to 1.5, Cu smaller or equal to 1.0, rare earth alloy and rare alloy smaller or equal to 1.5, all the other are iron.

2, a kind of paver blade rich chromium cast iron according to claim 1 regulation, it is characterized in that: its production technique is, adopt the production of molding machine mechanized continuous productive process, with resin sand or coal dust sand molding process, two of single-sided pattern plates one case, helical blade tile edging is become by iron core, iron core is cast in advance that blank processes from strand and was placed in the die cavity before the moulding mould assembling, iron liquid injects from cavity bottom during cast, and teeming temperature 1300-1480 degree centigrade, little riser runner is established in the die cavity top, iron core is worked as chill simultaneously, solidify with simultaneous solidification behind the iron liquid casting, when foundry goods is 800-900 degree centigrade for the garnet temperature, unpack, place air to naturally cool to room temperature, to heat-treat behind the foundry goods process ball blast polishing burr then, foundry goods is heated to the austenitizing temperature interval, is incubated 1-8 hour, be cooled to room temperature again and get final product.