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GB/T 48046-2026Silica-based ceramic cores for investment casting (English PDF)

熔模精密铸造硅基陶瓷型芯

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 48046-2026 is the English-translated version of 熔模精密铸造硅基陶瓷型芯.

GB/T 48046-2026 is the Chinese standard "Silica-based ceramic cores for investment casting". Its scope clause reads: This document specifies the structural design and technical requirements for investment casting silicon-based ceramic cores (hereinafter referred to as "ceramic cores"), and describes the phase...

The corresponding test methods, inspection rules, and requirements for packaging, labeling, transportation, and storage are specified.

This document applies to the manufacture of ceramic cores for investment castings of high-temperature alloys, stainless steel, titanium alloys, etc. Its clauses include terms and definitions; ceramic core structure design requirements.

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Document preview — GB/T 48046-2026

National Standard of the People's Republic of China

ICS: 81.060.99
Classification: J 31

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Ceramic core structure design requirements
5.Technical Requirements
6.Test methods
7 Inspection Rules
8 Packaging, labeling, transportation and storage
Appendix A (Informative) Core Mold Design Requirements

1 Scope

This document specifies the structural design and technical requirements for investment casting silicon-based ceramic cores (hereinafter referred to as "ceramic cores"), and describes the phase...

The corresponding test methods, inspection rules, and requirements for packaging, labeling, transportation, and storage are specified.

This document applies to the manufacture of ceramic cores for investment castings of high-temperature alloys, stainless steel, titanium alloys, etc.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 5611 Casting Terminology

GB/T 15056 Method for evaluating the surface roughness of castings

GB/T 42124.3 Product Geometric Specification (GPS) - Dimensions and Geometric Tolerances of Molded Parts - Part 3.Dimensional Tolerances of Castings

Geometric tolerances and machining allowances

HB5353.2 Test methods for the properties of investment casting ceramic cores - Part 2.Determination of firing shrinkage

HB5353.3 Test methods for the properties of investment casting ceramic cores - Part 3.Determination of flexural strength

HB5353.4 Test methods for the properties of investment casting ceramic cores - Part 4.Determination of thermal deformation

3 Terms and Definitions

The terms and definitions defined in GB/T 5611 and the following terms and definitions apply to this document.

3.1 Core

Removable parts.

3.2 silicon-based ceramic core

A ceramic core with silicon dioxide as the main material and fused silica or cristobalite as the main phase.

3.3 Ceramic core firing

The ceramic blank is heated to a certain high temperature and held at that temperature, causing the particles to bond through solid-phase diffusion and becoming appropriately dense, thus enabling the material to achieve a specific force.

The thermal processing of strength and phase structure state.

4 Ceramic core structure design requirements

4.1 Thinnest Wall

The thinnest wall thickness of the ceramic core is not less than 0.3 mm, as shown in Figure 1.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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