700mpa grade austenitic ferritic dual-phase low-density cast steel and its preparation method
An austenitic ferrite, low-density technology, applied in the direction of casting molding equipment, casting mold, casting mold composition, etc., can solve the problems of limited application scope of automobile lightweight, unsuitable for large-scale promotion and application, complex material characteristics and other problems , to achieve the effect of good application prospect, high strength plasticity and wide sources
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0027] The present invention also provides a preparation method of 700MPa-grade austenitic-ferritic dual-phase low-density cast steel, the method comprising the following steps:
[0028] a. Ingredients: use high-purity iron, electrolytic manganese, ferrosilicon, ferro-titanium, ferro-vanadium, ferro-niobium, aluminum particles, and carburizers as raw materials, and make ingredients according to the above ratio; the carburizers are artificial graphite, natural graphite or Any one of coke;
[0029] b. Molding: Use sodium silicate sand for molding, and blow carbon dioxide to harden the sand mold, then paint the inner wall of the sand mold, dry it, and wait for pouring;
[0030] c. Smelting: After adding high-purity iron into the medium-frequency induction furnace, the temperature is raised to above 1300°C. After the high-purity iron is completely melted, electrolytic manganese, ferrosilicon, ferro-titanium, ferro-vanadium, ferro-niobium, aluminum particles, and recarburizer are add...
Embodiment 1
[0041] Ingredients: Calculate the mass of each material according to the mass percentages of target components C: 0.82%, Mn: 18%, Si: 0.2%, V: 0.08%, Ti: 0.11%, Al: 12%, and Nb: 0.12%. Large pieces of charge such as high-purity iron are weighed with a 100kg electronic scale, and charges with a small amount of carburant, ferroniobium, and ferrovanadium are weighed with a 200g electronic scale. Dry processing, each furnace batching 100kg.
[0042] Table 1 Master alloy material list (unit wt%)
[0043] mn Si Ti V Nb C S P Al High purity iron 0.04 0.012 0 0 0 0.003 0.005 0.004 0 Electrolytic manganese 99.58 0.015 0 0 0 0 0.100 0.010 0 Ferrosilicon 0 72.10 0 0 0 0.100 0.016 0.034 1.50 Titanium Sponge 0 0.06 99.3 0 0 0 0.010 0.050 0 Ferrovanadium 0.29 1.76 0 49.35 0 0.330 0.001 0.045 0.50 Ferroniobium 0 2.81 0 0 65.50 0.100 0.060 0.190 0.42 Aluminum particles 0 0 0 0 ...
Embodiment 2
[0052] Calculate the mass of each material (high-purity iron, electrolytic manganese , ferrosilicon, titanium sponge, ferrovanadium, ferroniobium, aluminum particles, recarburizer). The batching, molding, smelting and pouring methods are as shown in Example 1, the difference is: in the heat treatment step, the casting is solid solutioned at 1000°C for 2 hours, cooled to room temperature with water, then aged at 500°C for 6.5 hours, and air cooled to room temperature. The austenitic-ferritic dual-phase low-density cast steel with the composition shown in Example 2 in Table 3 was obtained.
PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More