CN102876963A

CN102876963A - Anti-fatigue cast iron alloy

Info

Publication number: CN102876963A
Application number: CN2012103273779A
Authority: CN
Inventors: 忻峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-05
Filing date: 2012-09-05
Publication date: 2013-01-16

Abstract

The invention relates to an anti-fatigue cast iron alloy. The anti-fatigue cast iron alloy comprises the following components by weight: 3.35-3.38 percent of carbon, 1.8-2.0 percent of silicon, 0.45-0.57 percent of manganese, 0.2-0.3 percent of molybdenum, 0.08-0.15 percent of vanadium, 0.5-0.8 percent of copper, 0.003-0.08 percent of niobium, 0.08-0.3 percent of titanium, 0.005-0.012 percent of nitrogen, less than 0.15 percent of phosphorus and sulfur, less than 0.01 percent of aluminum and the balance of iron and inevitable impurities.

Description

The antifatigue cast iron alloy

Technical field

The present invention relates to a kind of iron alloy field, refer to specifically a kind of grey cast iron alloy with highly anti-fatigue intensity.

Background technology

Grey cast iron is because cost is relatively low, functional, so the wide range of using.But the compositing range of existing known grey cast iron is quite wide, yet as replenishing of existing performance, what need raising is fatigue strength, and the purposes of the existing grey cast iron of expansion.

Summary of the invention

The purpose of this invention is to provide a kind of grey cast iron, it has good processing characteristics and internal structure is arranged, and this cast iron alloy is compared the fatigue resistance with advantage with existing standard.

The present invention is achieved by the following technical solutions:

The antifatigue cast iron alloy, its composition of percentage composition comprises by weight: the carbon of 3.35-3.38%, the silicon of 1.8-2.0%, the manganese of 0.45-0.57%, the molybdenum of 0.2-0.3%, the vanadium of 0.08-0.15%, the copper of 0.5-0.8%, the 0.003-0.08% niobium, the titanium of 0.08-0.3%, the nitrogen of 0.005-0.012%, the p and s less than 0.15%, aluminium less than 0.01%, surplus are iron and inevitable impurity.

Described alloy is when refining, and chromium, titanium, v element will add at first, and then adds iron and carbon, is other element more afterwards.

Described chromium, titanium, v element are to add with ferrochrome, ferrotianium, ferrovanadium mode.

The invention has the beneficial effects as follows,

By technical scheme of the present invention, have good processing characteristics and internal structure when realizing the fatigue resistance of this cast iron alloy.

Embodiment

Below describe technical scheme of the present invention in detail by embodiment.

In the following description, all per-cents of each element in the concrete grey cast iron alloy are weight percentage.

Alloy body in technical scheme of the present invention mainly is to form the grey cast iron with pearlitic texture, its carbon content is 3.35-3.38%, certain carbon content outside this scope also can realize the grey pearlitic texture, but when carbon content during in the scope of the technical program, pearlitic density is very low, the fracture of cast iron is white in color, when carbon content is higher than the scope of the technical program, pearlitic content can increase, but it is inhomogeneous that pearlitic texture can become, although can be by increasing other element such as chromium, copper, niobium, titanium, molybdenum etc., but the amount that needs adding is greater than the amount of the technical program, although can realize pearlitic even structure, can change the performance of cast iron and increase production cost.

The molybdenum that adds 0.2-0.3%, the vanadium of 0.08-0.15%, the titanium of 0.08-0.3%, the niobium of 0.003-0.08%, it has the nuclear core of refined pearl-like body structure and flake graphite structure, and molybdenum also has the effect of high temperatures pearlitic texture simultaneously.

The content of aluminium is lower than 0.01%, adds the manganese of 0.45-0.57% as the stablizer of pearlitic texture; The copper of 0.5-0.8% promotes perlite to form and stable and control pearlitic texture; The content of nitrogen is 0.005-0.012%, has the flake graphite of compression and promotes perlite to form; P and s in the alloy body is less than 0.15%, and surplus is iron and inevitable impurity.

When refining, chromium, titanium, v element will add at first with ferrochrome, ferrotianium, ferrovanadium mode, and then add iron and carbon, are other element more afterwards.

Claims

1. antifatigue cast iron alloy, it is characterized in that: its composition of percentage composition comprises by weight: the carbon of 3.35-3.38%, the silicon of 1.8-2.0%, the manganese of 0.45-0.57%, the molybdenum of 0.2-0.3%, the vanadium of 0.08-0.15%, the copper of 0.5-0.8%, the 0.003-0.08% niobium, the titanium of 0.08-0.3%, the nitrogen of 0.005-0.012%, the p and s less than 0.15%, aluminium less than 0.01%, surplus are iron and inevitable impurity.

2. antifatigue cast iron alloy according to claim 1 is characterized in that: described alloy is when refining, and chromium, titanium, v element will add at first, and then adds iron and carbon, is other element more afterwards.

3. antifatigue cast iron alloy according to claim 2, it is characterized in that: described chromium, titanium, v element are to add with ferrochrome, ferrotianium, ferrovanadium mode.